/* ── Override main-content for solve page (fill viewport, like study room) ── */
.main-content,
#main-content {
    min-height: unset !important;
    padding-bottom: 0 !important;
    padding-top: 0 !important;
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    overscroll-behavior: none;
    animation: none;
}

/* On mobile the 60px header is a DOM sibling of #main-content, not a child.
   Without this correction, #main-content overflows by 60px and the pill bar
   sits below the visible viewport. */
@media (max-width: 1023px) {
    .main-content,
    #main-content {
        height: calc(100vh - 60px);
        height: calc(100dvh - 60px);
    }
    .qz-summary {
        margin: auto;
        padding: 40px 24px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-align: center;
    }
    .qz-scroll {
        display: flex;
        flex-direction: column;
    }
    .qz-header {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        z-index: 10;
        background: var(--bg-page, #0e0e0e);
    }
    .qz-map-section {
        padding-top: 48px;
    }
    .qz-map-box {
        border-radius: 50% !important;
    }
    .qz-progress {
        display: none;
    }
    .qz-nav-counter {
        display: none !important;
    }
    .qz-nav-center {
        display: none !important;
    }
    .qz-nav {
        flex-direction: row;
        justify-content: space-between;
    }
    .qz-nav .qz-nav-btn {
        flex: 1;
    }
    .qz-share-btn {
        padding: 5px 10px;
    }
}

/* ─── Page shell ──────────────────────────────────────────────────────────── */
.solve-page {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

/* ─── Idle state ──────────────────────────────────────────────────────────── */
.solve-idle {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    overflow-y: auto;
    min-height: 0;
    padding-top: min(18vh, 160px);
    padding-left: 32px;
    padding-right: 32px;
    padding-bottom: 36px;
}

.solve-headline {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 700;
    font-family: var(--font-display, inherit);
    text-align: center;
    margin: 0 0 32px;
    color: var(--text-primary, inherit);
    letter-spacing: -0.025em;
}

/* ── Subject pills with chevrons ────────────────────────────────────────── */
.solve-subjects-outer {
    display: flex;
    align-items: center;
    gap: 4px;
    width: 100%;
    max-width: 760px;
    margin-bottom: 24px;
}

.solve-chevron {
    flex-shrink: 0;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--text-muted, #9ca3af);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: color 0.15s, background 0.15s;
    padding: 0;
}
.solve-chevron:hover {
    color: var(--text-primary, inherit);
    background: var(--bg-hover, rgba(255,255,255,0.06));
}

.solve-subjects-wrap {
    position: relative;
    flex: 1;
    min-width: 0;
    overflow: hidden;
}
.solve-subjects-wrap::before,
.solve-subjects-wrap::after {
    content: '';
    position: absolute;
    top: 0; bottom: 0;
    width: 32px;
    z-index: 1;
    pointer-events: none;
}
.solve-subjects-wrap::before {
    left: 0;
    background: linear-gradient(to right, var(--bg-base, #0d0d0d), transparent);
}
.solve-subjects-wrap::after {
    right: 0;
    background: linear-gradient(to left, var(--bg-base, #0d0d0d), transparent);
}

.solve-subjects {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    scrollbar-width: none;
    padding: 4px 8px;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}
.solve-subjects::-webkit-scrollbar { display: none; }

.solve-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    padding: 8px 16px;
    border-radius: 12px;
    border: 1px solid var(--border-subtle, #2c2c2c);
    background: var(--bg-card, #171717);
    color: var(--text-muted, #9ca3af);
    font-size: 0.83rem;
    font-weight: 500;
    font-family: var(--font-body, inherit);
    cursor: pointer;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
    flex-shrink: 0;
    line-height: 1;
}
.solve-pill:hover { background: var(--bg-hover, #1e1e1e); color: var(--text-primary, inherit); }
.solve-pill.active {
    border-color: var(--pill-color, var(--primary, #7c6cfa));
    color: var(--pill-color, var(--primary, #7c6cfa));
    background: color-mix(in srgb, var(--pill-color, var(--primary, #7c6cfa)) 10%, transparent);
}

/* ── Drop zone ──────────────────────────────────────────────────────────── */
.solve-drop-zone {
    width: min(76%, 720px);
    height: 110px;
    border: 2px dashed var(--border-subtle, #2c2c2c);
    border-radius: 22px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--text-muted, #9ca3af);
    cursor: pointer;
    transition: border-color 0.18s, background 0.18s, color 0.18s;
    background: var(--bg-card, #171717);
    user-select: none;
    margin-bottom: 25px;
}
.solve-drop-zone:hover, .solve-drop-zone.dragover {
    border-color: var(--primary, #7c6cfa);
    background: color-mix(in srgb, var(--primary, #7c6cfa) 6%, transparent);
    color: var(--primary, #7c6cfa);
}
.solve-drop-zone p { font-size: 0.82rem; margin: 0; }

/* ── Stacked input card ─────────────────────────────────────────────────── */
.solve-input-card {
    width: min(76%, 760px);
    margin-top: -48px;
    border-radius: 22px;
    border: 1px solid var(--border-subtle, #2c2c2c);
    background: var(--bg-card, #171717);
    overflow: hidden;
    position: relative;
    z-index: 2;
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.3);
}

.solve-textarea {
    width: 100%;
    min-height: 62px;
    max-height: 140px;
    resize: none;
    background: transparent;
    border: none;
    padding: 18px 20px 8px;
    font-size: 0.92rem;
    font-family: var(--font-body, inherit);
    color: var(--text-primary, inherit);
    outline: none;
    box-sizing: border-box;
    line-height: 1.55;
}
.solve-textarea::placeholder { color: var(--text-muted, #6b7280); }

.solve-input-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 14px 12px;
    gap: 8px;
}

/* ── Thinking toggle ────────────────────────────────────────────────────── */
.solve-thinking-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.76rem;
    color: var(--text-muted, #9ca3af);
    cursor: pointer;
    user-select: none;
}
.solve-thinking-toggle {
    position: relative;
    width: 36px;
    height: 20px;
    border-radius: 10px;
    background: var(--bg-hover, #3a3a3a);
    border: none;
    cursor: pointer;
    transition: background 0.2s;
    flex-shrink: 0;
    padding: 0;
}
.solve-thinking-toggle.on { background: var(--primary, #7c6cfa); }
.solve-thinking-knob {
    position: absolute;
    left: 2px; top: 2px;
    width: 16px; height: 16px;
    border-radius: 50%;
    background: #fff;
    transition: transform 0.2s;
    pointer-events: none;
}
.solve-thinking-toggle.on .solve-thinking-knob { transform: translateX(16px); }

/* ── Send button (shared) ───────────────────────────────────────────────── */
.solve-send-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary, #7c6cfa);
    border: none;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: opacity 0.15s, transform 0.15s;
    flex-shrink: 0;
    padding: 0;
}
.solve-send-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.solve-send-btn:not(:disabled):hover { transform: translateY(-1px); opacity: 0.9; }

/* ─── Chat state ──────────────────────────────────────────────────────────── */
.solve-chat {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

/* ── Chat header (subject label + New button in same row) ── */
.solve-chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    padding: 14px 18px;
    position: relative;
    z-index: 2;
}

.solve-chat-header .sv-subject-label {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 13px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--sv-subj-color, var(--primary));
    background: color-mix(in srgb, var(--sv-subj-color, var(--primary)) 14%, transparent);
    border: 1px solid color-mix(in srgb, var(--sv-subj-color, var(--primary)) 28%, transparent);
    flex-shrink: 0;
}

/* "New" button (in header, not absolute) */
.solve-float-new {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    border-radius: 20px;
    border: 1px solid var(--border-subtle, #2c2c2c);
    background: var(--bg-card, #171717);
    color: var(--text-muted, #9ca3af);
    font-size: 0.74rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    font-family: var(--font-body, inherit);
    flex-shrink: 0;
}
.solve-float-new:hover { background: var(--bg-hover, #1e1e1e); color: var(--text-primary, inherit); }

/* Thread */
.solve-thread-wrap {
    flex: 1;
    overflow-y: auto;
    min-height: 0;
    padding: 16px 270px 80px;
    display: flex;
    flex-direction: column;
    scrollbar-width: none;
    overflow-anchor: auto;
}
.solve-thread {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 760px;
    width: 100%;
    overflow-anchor: auto;
    margin: 0 auto;
}

/* ── User bubble ── */
.sv-bubble--user {
    align-self: flex-end;
    max-width: 78%;
    background: #2a2a2a;
    color: var(--text-primary, #e5e7eb);
    padding: 10px 14px;
    border-radius: 18px 18px 4px 18px;
    font-size: 1rem;
    font-family: var(--font-body);
    line-height: 1.55;
    word-break: break-word;
}
html[data-theme="light"] .sv-bubble--user {
    background: #e9eaec;
    color: #0f172a;
}

/* ── File chip inside user bubble (matches study room cmsg-context-chip) ── */
.sv-file-chip {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.62rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: color-mix(in srgb, var(--primary, #7c6cfa) 80%, currentColor);
    opacity: 0.8;
    margin-bottom: 5px;
    line-height: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.sv-file-chip svg { flex-shrink: 0; }

/* ── AI text output (no bubble — matches study room cmsg-text--ai) ── */
.sv-text--ai {
    max-width: 92%;
    font-size: 0.875rem;
    line-height: 1.65;
    font-family: var(--font-body);
    color: #d4d4d4;
    word-break: break-word;
    user-select: text;
    -webkit-user-select: text;
}

.sv-tw-cursor {
    display: inline-block;
    width: 2px;
    height: 1.1em;
    background: var(--primary, #7c6cfa);
    margin-left: 1px;
    vertical-align: text-bottom;
    animation: svTwBlink 0.6s step-end infinite;
}

@keyframes svTwBlink {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0; }
}

.sv-text--ai mjx-container,
.sv-text--ai .MathJax,
.sv-text--ai .MathJax_SVG {
    user-select: text;
    -webkit-user-select: text;
}

.sv-text--ai mjx-container[display="true"],
.sq-question mjx-container[display="true"],
.sq-solution mjx-container[display="true"],
.sq-opt-text mjx-container[display="true"] {
    display: block;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    padding: 2px 0;
    max-width: 100%;
    scrollbar-width: thin;
    scrollbar-color: transparent transparent;
    transition: scrollbar-color .2s;
}
.sq-question mjx-container[display="true"]:hover,
.sq-solution mjx-container[display="true"]:hover,
.sq-opt-text mjx-container[display="true"]:hover {
    scrollbar-color: var(--border) transparent;
}
.sq-question mjx-container[display="true"]::-webkit-scrollbar,
.sq-solution mjx-container[display="true"]::-webkit-scrollbar,
.sq-opt-text mjx-container[display="true"]::-webkit-scrollbar {
    height: 3px;
    background: transparent;
}
.sq-question mjx-container[display="true"]::-webkit-scrollbar-thumb,
.sq-solution mjx-container[display="true"]::-webkit-scrollbar-thumb,
.sq-opt-text mjx-container[display="true"]::-webkit-scrollbar-thumb {
    background: transparent;
    border-radius: 2px;
}
.sq-question mjx-container[display="true"]:hover::-webkit-scrollbar-thumb,
.sq-solution mjx-container[display="true"]:hover::-webkit-scrollbar-thumb,
.sq-opt-text mjx-container[display="true"]:hover::-webkit-scrollbar-thumb {
    background: var(--border);
}
.sv-text--ai mjx-container[display="true"] {
    padding: 4px 0;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
.sv-text--ai mjx-container[display="true"]::-webkit-scrollbar { display: none; }

.sv-text--ai .prose { line-height: 1.65; font-size: 1rem; font-family: var(--font-body); }

.sv-text--ai .prose p { margin: 0.8em 0; }
.sv-text--ai .prose p:first-child { margin-top: 0; }
.sv-text--ai .prose p:last-child { margin-bottom: 0; }
.sv-text--ai .prose ul { margin: 0.7em 0; padding-left: 1.3em; list-style: disc; }
.sv-text--ai .prose li { margin: 0.35em 0.95rem; }
.sv-text--ai .prose h2 { font-size: 1.1rem; font-weight: 700; margin: 1em 0 0.35em; color: #ffffff; }
.sv-text--ai .prose h3 { font-size: 1rem; font-weight: 700; margin: 0.9em 0 0.3em; color: #ffffff; }
.sv-text--ai .prose h4 { font-size: 0.92rem; font-weight: 600; margin: 0.8em 0 0.25em; color: #ffffff; }

.sv-text--ai .prose h2,
.sv-text--ai .prose h3,
.sv-text--ai .prose h4 {font-family: 'DM Sans'}
.sv-text--ai strong { font-weight: 700; color: #ffffff; }

.sv-text--ai code {
    background: rgba(255,255,255,0.08);
    padding: 1px 5px;
    border-radius: 4px;
    font-size: 0.82em;
    font-family: 'Courier New', monospace;
    color: var(--primary,#4ecdc4);
}
.sv-text--ai pre {
    background: #0d0d0d;
    border: 1px solid #2a2a2a;
    border-radius: 8px;
    padding: 10px 12px;
    overflow-x: auto;
    margin: 0.5em 0;
}
.sv-text--ai pre code { background: none; padding: 0; color: #e2e8f0; }

.sv-text--ai hr { border: none; border-top: 1px solid #333; margin: 1.2em 0; }
.sv-text--ai blockquote {
    border-left: 3px solid var(--primary,#7c6cfa);
    padding: 0.4em 0 0.4em 14px;
    margin: 0.7em 0;
    color: #9ca3af;
    font-style: italic;
    background: rgba(255,255,255,0.03);
    border-radius: 0 6px 6px 0;
}
.sv-text--ai .md-table-wrap { overflow-x: auto; margin: 1em 0; }
.sv-text--ai table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
.sv-text--ai th {
    background: rgba(255,255,255,0.06);
    padding: 10px 12px;
    text-align: left;
    font-weight: 700;
    border-bottom: 2px solid #333;
    color: #e2e8f0;
}
.sv-text--ai td {
    padding: 9px 12px;
    border-bottom: 1px solid #2a2a2a;
    color: #d1d5db;
}
.sv-text--ai a {
    color: #7dd3fc;
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* ── Thinking ring ── */
.sv-bubble--thinking {
    display: flex;
    align-items: center;
    gap: 10px;
    opacity: 0.6;
    min-width: 58px;
    padding: 12px 0;
}

/* ── Thinking ring ── */
.sv-thinking-ring {
    flex-shrink: 0;
    animation: svRingSpin 1s linear infinite;
}
@keyframes svRingSpin {
    to { transform: rotate(360deg); }
}
.sv-ring-bg { stroke: color-mix(in srgb, var(--text-secondary, #a0a0a8) 25%, transparent); stroke-width: 4; fill: none; }
.sv-ring-fg { stroke: var(--text-secondary, #a0a0a8); stroke-width: 4; fill: none; stroke-linecap: round; stroke-dasharray: 80, 140; }

/* ── Shimmering text ── */
.sv-thinking-text {
    font-size: 0.88rem;
    font-weight: 500;
    font-family: var(--font-body);
    line-height: 1.4;
    color: var(--text-secondary, #a0a0a8);
}
.sv-thinking-text--shimmer {
    background: linear-gradient(
        90deg,
        var(--text-secondary, #a0a0a8) 0%,
        var(--text-primary, #f1f1f3) 50%,
        var(--text-secondary, #a0a0a8) 100%
    );
    background-size: 200% auto;
    color: transparent;
    -webkit-background-clip: text;
    background-clip: text;
    animation: svShimmer 3s linear infinite;
}
@keyframes svShimmer {
    to { background-position: 200% center; }
}

.sv-upgrade-btn {
    background: none; border: none;
    color: var(--primary, #7c6cfa);
    cursor: pointer; text-decoration: underline;
    font-size: inherit; padding: 0;
}

/* ── Question cards (borderless, inline in thread) ───────────────────────── */
.sq-set {
    margin-top: 8px;
    max-width: 100%;
}

/* ── Quiz bundle container ──────────────────────────────────────────────── */
.sq-bundle {
    background: var(--bg-elevated, rgba(255,255,255,0.04));
    border: 1px solid var(--border-subtle, rgba(255,255,255,0.08));
    border-radius: 12px;
    padding: 16px 18px;
    margin-top: 8px;
    max-width: 100%;
    overflow: hidden;
}
html[data-theme="light"] .sq-bundle {
    background: #fafafa;
    border-color: #e5e7eb;
}

/* ── Start screen ────────────────────────────────────────────────────────── */
.sq-start {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 12px 0;
}
.sq-start-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: color-mix(in srgb, var(--primary, #5b4cdb) 12%, transparent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
}
.sq-start-icon svg {
    color: var(--primary, #5b4cdb);
}
.sq-start-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary, #e5e7eb);
    margin-bottom: 4px;
}
.sq-start-sub {
    font-size: 0.8rem;
    color: var(--text-muted, #9ca3af);
    margin-bottom: 14px;
}
.sq-start-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 22px;
    border: none;
    border-radius: 20px;
    background: var(--primary, #5b4cdb);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.15s ease, transform 0.1s ease;
}
.sq-start-btn:hover { opacity: 0.88; }
.sq-start-btn:active { transform: scale(0.97); }
html[data-theme="light"] .sq-start-btn { color: #fff; }

/* ── Card slide animation ────────────────────────────────────────────────── */
.sq-card--exit {
    opacity: 0;
    transform: translateX(-16px);
    transition: opacity 0.18s ease, transform 0.18s ease;
}
.sq-card--enter {
    opacity: 0;
    transform: translateX(16px);
}
.sq-card--enter.sq-card--visible {
    opacity: 1;
    transform: translateX(0);
    transition: opacity 0.22s ease, transform 0.22s ease;
}

.sq-progress {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-muted, #6b7280);
    letter-spacing: 0.03em;
    margin-bottom: 10px;
}

.sq-question {
    margin-bottom: 14px;
}
.sq-question .prose {
    font-size: 0.95rem;
    line-height: 1.55;
    font-family: var(--font-body);
    color: var(--text-primary, #e5e7eb);
    overflow-wrap: break-word;
}
.sq-question .prose p { margin: 0.3em 0; }

/* ── MCQ options ── */
.sq-options {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 14px;
}

.sq-opt {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 14px;
    border: 1px solid transparent;
    border-radius: 10px;
    background: transparent;
    color: var(--text-primary, #e5e7eb);
    font-size: 0.9rem;
    font-family: var(--font-body, inherit);
    text-align: left;
    cursor: pointer;
    transition: background 0.12s, border-color 0.12s;
    line-height: 1.4;
}
.sq-opt:hover { background: var(--bg-hover, rgba(255,255,255,0.05)); }
.sq-opt--selected {
    background: color-mix(in srgb, var(--primary, #7c6cfa) 12%, transparent);
    color: var(--primary, #7c6cfa);
}
.sq-opt--correct {
    border: 1px solid #22c55e;
    color: #22c55e;
    cursor: default;
}
.sq-opt--wrong {
    border: 1px solid #ef4444;
    color: #ef4444;
    cursor: default;
}

.sq-opt-badge {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 700;
    background: rgba(255,255,255,0.06);
    color: var(--text-muted, #9ca3af);
}
.sq-opt--selected .sq-opt-badge {
    background: color-mix(in srgb, var(--primary, #7c6cfa) 20%, transparent);
    color: var(--primary, #7c6cfa);
}
.sq-opt--correct .sq-opt-badge {
    background: color-mix(in srgb, #22c55e 20%, transparent);
    color: #22c55e;
}
.sq-opt--wrong .sq-opt-badge {
    background: color-mix(in srgb, #ef4444 20%, transparent);
    color: #ef4444;
}

.sq-opt-text { flex: 1; }

/* ── Open-ended input ── */
.sq-input-wrap {
    margin-bottom: 14px;
}
.sq-input {
    width: 100%;
    box-sizing: border-box;
    resize: vertical;
    background: var(--bg-card, #171717);
    border: 1px solid var(--border-subtle, #2c2c2c);
    border-radius: 12px;
    outline: none;
    font-size: 0.88rem;
    font-family: var(--font-body, inherit);
    color: var(--text-primary, inherit);
    padding: 12px 14px;
    line-height: 1.55;
    min-height: 72px;
    transition: border-color 0.15s;
}
.sq-input:focus { border-color: #555; }
.sq-input::placeholder { color: var(--text-muted, #585858); }

/* ── Button row ── */
.sq-btn-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 6px;
    flex-wrap: wrap;
}

.qc-submit-btn {
    padding: 8px 20px;
    border-radius: 20px;
    border: none;
    background: var(--primary, #7c6cfa);
    color: #fff;
    font-size: 0.82rem;
    font-weight: 600;
    font-family: var(--font-body, inherit);
    cursor: pointer;
    transition: opacity 0.15s;
}
.qc-submit-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.qc-submit-btn:not(:disabled):hover { opacity: 0.85; }

.qc-skip-btn {
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid var(--border-subtle, #2c2c2c);
    background: transparent;
    color: var(--text-muted, #9ca3af);
    font-size: 0.82rem;
    font-weight: 500;
    font-family: var(--font-body, inherit);
    cursor: pointer;
    transition: color 0.15s, background 0.15s;
}
.qc-skip-btn:hover { color: var(--text-primary, inherit); background: var(--bg-hover, rgba(255,255,255,0.04)); }

.qc-next-btn {
    padding: 8px 24px;
    border-radius: 20px;
    border: none;
    background: var(--primary, #7c6cfa);
    color: #fff;
    font-size: 0.82rem;
    font-weight: 600;
    font-family: var(--font-body, inherit);
    cursor: pointer;
    transition: opacity 0.15s;
}
.qc-next-btn:hover { opacity: 0.85; }

/* ── Separator between persisted questions ── */
.sq-set-sep {
    height: 1px;
    background: var(--border-subtle, #2c2c2c);
    margin: 20px 0;
}

/* ── Solution ── */
.sq-solution {
    margin-top: 14px;
}

@keyframes sqSolIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes sqStepIn {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

.sq-solution-label {
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--primary, #7c6cfa);
    margin-bottom: 10px;
    animation: sqSolIn 0.3s ease-out both;
}

/* Fallback when steps aren't parsed */
.sq-solution > .prose {
    line-height: 1.55;
    font-size: 1rem;
    font-family: var(--font-body);
    color: #d4d4d4;
    animation: sqSolIn 0.35s ease-out both;
}

/* Step cards */
.sq-step {
    margin-bottom: 18px;
    padding: 20px 22px;
    max-width: 100%;
    animation: sqStepIn 0.35s ease-out both;
    animation-delay: 0s;
}
.sq-step:last-child {
    margin-bottom: 0;
}

.sq-step-hd {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.sq-step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--primary, #7c6cfa);
    color: #fff;
    font-size: 0.8rem;
    font-weight: 700;
    flex-shrink: 0;
    line-height: 1;
}

.sq-step-title {
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-body);
    color: var(--text-primary, #e5e7eb);
}

.sq-step-body {
    font-size: 1rem;
    line-height: 1.55;
    color: #d4d4d4;
    max-width: 100%;
}
.sq-step-body .prose { line-height: 1.55; font-size: 1rem; font-family: var(--font-body); overflow-wrap: break-word; }
.sq-step-body .prose p { margin: 0.2em 0; }
.sq-step-body .prose ul { margin: 0.4em 0; padding-left: 1.3em; list-style: disc; }
.sq-step-body .prose code {
    background: rgba(255,255,255,0.08);
    padding: 1px 5px;
    border-radius: 4px;
    font-size: 0.82em;
    font-family: 'Courier New', monospace;
    color: var(--primary,#4ecdc4);
}

.sq-step-callout {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border-subtle, #2c2c2c);
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-secondary, #a1a1aa);
}
.sq-step-callout p {
    margin: 0;
}
.sq-step-callout p:first-child {
    display: inline;
}
.sq-step-callout p:first-child::before {
    content: '\00BB\00A0';
}

/* Not among options notice */
.sq-no-correct {
    margin-top: 12px;
    padding: 12px 18px;
    border-radius: 10px;
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.2);
    font-size: 0.88rem;
    line-height: 1.45;
    color: #f87171;
    font-weight: 500;
}

.sq-feedback {
    margin-top: 14px;
    margin-bottom: 4px;
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
}
.sq-feedback--correct { color: #22c55e; }
.sq-feedback--wrong { color: #ef4444; }

/* ── Summary ── */
.sq-summary {
    padding: 18px 0;
}
.sq-summary-heading {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary, #e5e7eb);
    margin-bottom: 6px;
}
.sq-summary-detail {
    font-size: 0.85rem;
    color: var(--text-muted, #9ca3af);
}
.sq-summary-score {
    font-size: 0.85rem;
    font-weight: 600;
    color: #22c55e;
    margin-top: 4px;
}
.sq-mistakes-heading {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary, #e5e7eb);
    margin: 18px 0 8px;
    padding-top: 14px;
    border-top: 1px solid var(--border-subtle, rgba(255,255,255,0.06));
}
.sq-mistake-card {
    background: var(--bg-elevated, rgba(255,255,255,0.04));
    border: 1px solid var(--border-subtle, rgba(255,255,255,0.06));
    border-radius: 10px;
    padding: 12px 14px;
    margin-bottom: 8px;
}
.sq-mistake-q {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary, #e5e7eb);
    margin-bottom: 6px;
}
.sq-mistake-q .prose { font-size: 0.85rem; }
.sq-mistake-answer {
    font-size: 0.8rem;
    color: #22c55e;
    margin-bottom: 4px;
}
.sq-mistake-expl {
    font-size: 0.8rem;
    color: var(--text-muted, #9ca3af);
    line-height: 1.5;
}
.sq-mistake-expl .prose { font-size: 0.8rem; }

/* Light mode overrides for question cards */
html[data-theme="light"] .sq-question .prose { color: var(--text-primary, #111827); }
html[data-theme="light"] .sq-opt { color: #111827; }
html[data-theme="light"] .sq-opt:hover { background: #f3f4f6; }
html[data-theme="light"] .sq-opt--selected { background: color-mix(in srgb, var(--primary, #5b4cdb) 10%, transparent); }
html[data-theme="light"] .sq-opt--correct { background: color-mix(in srgb, #22c55e 10%, #f0fdf4); border-color: #86efac; color: #15803d; }
html[data-theme="light"] .sq-opt--wrong { background: color-mix(in srgb, #ef4444 10%, #fef2f2); border-color: #fca5a5; color: #b91c1c; }
html[data-theme="light"] .sq-feedback--correct { color: #15803d; }
html[data-theme="light"] .sq-feedback--wrong { color: #b91c1c; }
html[data-theme="light"] .sq-opt-badge { background: rgba(0,0,0,0.06); color: #6b7280; }
html[data-theme="light"] .sq-opt--selected .sq-opt-badge { background: color-mix(in srgb, var(--primary, #5b4cdb) 18%, transparent); }
html[data-theme="light"] .sq-opt--correct .sq-opt-badge { background: color-mix(in srgb, #22c55e 18%, transparent); }
html[data-theme="light"] .sq-opt--wrong .sq-opt-badge { background: color-mix(in srgb, #ef4444 18%, transparent); }
html[data-theme="light"] .sq-input { background: #fff; border-color: #e5e7eb; color: #111827; }
html[data-theme="light"] .sq-input:focus { border-color: #9ca3af; }
html[data-theme="light"] .sq-input::placeholder { color: #9ca3af; }
html[data-theme="light"] .sq-solution > .prose { color: #1e293b; }
html[data-theme="light"] .sq-step-title { color: var(--text-primary); }
html[data-theme="light"] .sq-step-body { color: #1e293b; }
html[data-theme="light"] .sq-step-body .prose code { background: rgba(0,0,0,0.06); }
html[data-theme="light"] .sq-step-callout { color: #6b7280; border-color: #e5e7eb; }
html[data-theme="light"] .sq-step-callout p:first-child::before { color: #6b7280; }
html[data-theme="light"] .qc-skip-btn { border-color: #e5e7eb; color: #6b7280; }
html[data-theme="light"] .qc-skip-btn:hover { background: #f3f4f6; color: #111827; }
html[data-theme="light"] .sq-mistake-card { background: #fafafa; border-color: #e5e7eb; }
html[data-theme="light"] .sq-mistake-q { color: #111827; }
html[data-theme="light"] .sq-mistake-answer { color: #15803d; }
html[data-theme="light"] .sq-mistake-expl { color: #6b7280; }
html[data-theme="light"] .sq-mistakes-heading { color: #111827; border-color: #e5e7eb; }

/* ── Kimi-style chat editor ────────────────────────────────────────────── */
.chat-editor {
    position: relative;
    display: flex;
    flex-direction: column;
    margin: 12px auto;
    width: min(76%, 760px);
    background: var(--bg-card, #171717);
    border: 1px solid var(--border-subtle, #2c2c2c);
    border-radius: 18px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
    flex-shrink: 0;
    box-sizing: border-box;
    transition: border-color 0.2s ease;
    overflow: visible;
}
.chat-editor:focus-within { border-color: rgba(255, 255, 255, 0.12); }

.chat-editor-content {
    display: flex;
    flex-direction: column;
    padding: 0;
}

/* ── Top toolbar (attach button) ─────────────────────────────────────── */
.chat-editor-toolbar {
    display: flex;
    align-items: center;
    padding: 10px 14px 0;
    gap: 6px;
}

.chat-toolbar-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 10px;
    border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
    background: transparent;
    color: var(--text-muted, #8a8f98);
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
    flex-shrink: 0;
    padding: 0;
}
.chat-toolbar-btn:hover {
    background: var(--bg-hover, rgba(255, 255, 255, 0.05));
    color: var(--text-primary, #e5e7eb);
    border-color: rgba(255, 255, 255, 0.14);
}
html[data-theme="light"] .chat-toolbar-btn {
    border-color: rgba(0, 0, 0, 0.1);
    color: #6b7280;
}
html[data-theme="light"] .chat-toolbar-btn:hover {
    background: rgba(0, 0, 0, 0.04);
    color: #111827;
    border-color: rgba(0, 0, 0, 0.18);
}

/* ── Textarea input ──────────────────────────────────────────────────── */
.chat-input {
    width: 100%;
    box-sizing: border-box;
    resize: none;
    background: transparent;
    border: none;
    outline: none;
    font-size: 0.95rem;
    font-family: var(--font-body, inherit);
    color: var(--text-primary, inherit);
    min-height: 64px;
    max-height: 160px;
    line-height: 1.55;
    padding: 16px 16px 0;
    scrollbar-width: none;
    display: block;
}
.chat-input::-webkit-scrollbar { display: none; }
.chat-input::placeholder { color: var(--text-muted, #585858); }
html[data-theme="light"] .chat-input { color: #111827; }
html[data-theme="light"] .chat-input::placeholder { color: #9ca3af; }

/* ── Bottom action bar ───────────────────────────────────────────────── */
.chat-editor-action {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px 10px;
}

.chat-action-left {
    display: flex;
    align-items: center;
    gap: 2px;
}

.chat-action-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.chat-action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 10px;
    border: none;
    background: transparent;
    color: var(--text-muted, #8a8f98);
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
    flex-shrink: 0;
    padding: 0;
}
.chat-action-btn:hover {
    background: var(--bg-hover, rgba(255, 255, 255, 0.05));
    color: var(--text-primary, #e5e7eb);
}
.chat-action-btn.is-recording {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
    animation: chat-mic-pulse 1.2s ease-in-out infinite;
}
@keyframes chat-mic-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.25); }
    50%       { box-shadow: 0 0 0 5px rgba(239, 68, 68, 0); }
}
html[data-theme="light"] .chat-action-btn { color: #6b7280; }
html[data-theme="light"] .chat-action-btn:hover { background: rgba(0, 0, 0, 0.04); color: #111827; }

/* ── Model selector label ────────────────────────────────────────────── */
.chat-model-name {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--text-muted, #6b7280);
    letter-spacing: 0.01em;
    cursor: default;
    user-select: none;
    line-height: 1;
}
.chat-model-name svg {
    opacity: 0.5;
}
html[data-theme="light"] .chat-model-name { color: #9ca3af; }

/* ── Send button ─────────────────────────────────────────────────────── */
.chat-send-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    border: none;
    background: var(--primary, #7c6cfa);
    color: #fff;
    cursor: pointer;
    transition: opacity 0.15s ease, transform 0.1s ease;
    flex-shrink: 0;
    padding: 0;
}
.chat-send-btn:not(:disabled):hover { opacity: 0.88; transform: translateY(-1px); }
.chat-send-btn:disabled { opacity: 0.3; cursor: not-allowed; }
html[data-theme="light"] .chat-send-btn { background: #111; color: #fff; }
html[data-theme="light"] .chat-send-btn:not(:disabled):hover { background: #374151; }

/* ── Publisher shortcuts (below editor) ──────────────────────────────── */
.publisher-shortcut {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px 0;
    margin: 0 auto;
    width: min(76%, 760px);
    overflow-x: auto;
    scrollbar-width: none;
    flex-shrink: 0;
    box-sizing: border-box;
}
.publisher-shortcut::-webkit-scrollbar { display: none; }

.publisher-shortcut-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 12px 12px;
    border-radius: 26px;
    border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.07));
    background: transparent;
    color: var(--text-muted, #6b7280);
    font-size: 0.72rem;
    font-weight: 500;
    font-family: var(--font-body, inherit);
    white-space: nowrap;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
    flex-shrink: 0;
    line-height: 1;
}
.publisher-shortcut-btn:hover {
    background: var(--bg-hover, rgba(255, 255, 255, 0.04));
    color: var(--text-primary, #e4e5e7);
    border-color: rgba(255, 255, 255, 0.12);
}
.publisher-shortcut-btn svg {
    flex-shrink: 0;
    opacity: 0.6;
}
html[data-theme="light"] .publisher-shortcut-btn {
    border-color: rgba(0, 0, 0, 0.08);
    color: #6b7280;
}
html[data-theme="light"] .publisher-shortcut-btn:hover {
    background: rgba(0, 0, 0, 0.03);
    color: #111827;
    border-color: rgba(0, 0, 0, 0.12);
}

.solve-disclaimer {
    text-align: center;
    font-size: 0.7rem;
    color: var(--text-muted, #9ca3af);
    margin: 0 auto 10px;
    padding: 0 32px;
    line-height: 1.4;
    flex-shrink: 0;
    max-width: min(76%, 760px);
}

/* ── Welcome state (centered input, no history) ── */
.solve-welcome { display: none; }

.solve-chat--welcome {
  justify-content: center;
}
.solve-chat--welcome .solve-chat-header { display: none; }
.solve-chat--welcome .solve-thread-wrap { display: none; }
.solve-chat--welcome .solve-disclaimer { display: none; }
.solve-chat--welcome .publisher-shortcut { display: flex; }
.publisher-shortcut { display: none; }
.solve-chat--welcome .solve-welcome {
  display: block;
  text-align: center;
  padding: 0 32px;
  margin-bottom: 20px;
}
.solve-welcome-title {
  font-size: clamp(1.35rem, 2.5vw, 1.8rem);
  font-weight: 700;
  font-family: var(--font-display, inherit);
  color: var(--text-primary, inherit);
  letter-spacing: -0.025em;
  margin: 0;
}

/* ── Shared font: force DM Sans on all text containers ── */
.sv-text--ai,
.sv-text--ai .prose,
.sv-text--ai .prose p,
.sv-text--ai .prose li,
.sv-text--ai .prose code,
.sv-text--ai .prose a,
.sv-text--ai .prose blockquote,
.sv-text--ai .prose table,
.sv-text--ai .prose td,
.sv-text--ai .prose th,
.sv-bubble--user,
.sv-thinking-text,
.sq-question .prose,
.sq-question .prose p,
.sq-question .prose li,
.sq-step-title,
.sq-step-body,
.sq-step-body .prose,
.sq-step-body .prose p,
.sq-step-body .prose li,
.sq-step-body .prose code,
.sq-solution > .prose,
.sq-solution > .prose p,
.chat-input,
.solve-textarea,
.sv-error-message {
    font-family: var(--font-body);
}



/* ── Attachment preview bar (above pill bar, like study room) ── */
.solve-attach-preview {
    flex-shrink: 0;
    padding: 0 18px;
    max-width: min(76%, 760px);
    width: 100%;
    margin: 0 auto;
    box-sizing: border-box;
}
.solve-attach-preview-items {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    scrollbar-width: none;
    padding: 4px 0;
}
.solve-attach-preview-items::-webkit-scrollbar { display: none; }
/* shared base */
.sap-preview-item {
    position: relative;
    flex-shrink: 0;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.09);
    transition: border-color 0.15s, background 0.15s;
    overflow: hidden;
}
/* image variant gets a primary-tinted border; doc gets neutral */
.sap-preview-item--image {
    border-color: color-mix(in srgb, var(--primary, #7c6cfa) 28%, transparent);
}

/* ── Image variant: large thumbnail square (like study room) ── */
.sap-preview-item--image {
    width: 78px;
    height: 70px;
    background: var(--bg-card, #171717);
}
.sap-preview-item--image:hover {
    border-color: color-mix(in srgb, var(--primary, #7c6cfa) 60%, transparent);
}
.sap-preview-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* ── Document variant: neutral card (like Claude AI) ── */
.sap-preview-item--doc {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px 8px 8px;
    min-width: 170px;
    max-width: 220px;
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.09) !important;
}
.sap-preview-item--doc:hover {
    border-color: rgba(255, 255, 255, 0.18) !important;
    background: rgba(255, 255, 255, 0.08);
}

/* Icon block — color driven by file type, not brand hue */
.sap-preview-icon {
    width: 38px;
    height: 38px;
    border-radius: 8px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    /* default fallback */
    background: rgba(140, 140, 155, 0.18);
    color: #9ca3af;
}
/* PDF → warm red */
.sap-preview-icon--pdf  { background: rgba(220, 68,  50, 0.18); color: #e05535; }
/* Word docs → blue */
.sap-preview-icon--docx,
.sap-preview-icon--doc  { background: rgba( 59, 130, 246, 0.18); color: #5b9cf6; }
/* PowerPoint → orange */
.sap-preview-icon--pptx,
.sap-preview-icon--ppt  { background: rgba(220, 110, 40, 0.18); color: #e07830; }

.sap-preview-info {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
    flex: 1;
}
.sap-preview-name {
    font-size: 0.73rem;
    color: var(--text-primary, #e5e7eb);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
    font-weight: 500;
    line-height: 1.2;
}
.sap-preview-ext {
    font-size: 0.6rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted, #6b7280);
    line-height: 1;
}
/* Doc remove: inline, fades in on hover */
.sap-preview-remove {
    width: 18px;
    height: 18px;
    border: none;
    background: transparent;
    color: var(--text-muted, #9ca3af);
    font-size: 0.85rem;
    line-height: 1;
    cursor: pointer;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    padding: 0;
    opacity: 0;
    transition: opacity 0.12s, color 0.12s, background 0.12s;
}
.sap-preview-item:hover .sap-preview-remove { opacity: 1; }
.sap-preview-remove:hover { background: rgba(239,68,68,0.15); color: #ef4444; }

/* Image remove: top-right corner badge (like study room) */
.sap-preview-remove--image {
    position: absolute;
    top: 0; right: 0;
    width: 20px; height: 20px;
    background: rgba(0, 0, 0, 0.6);
    color: #fff;
    font-size: 0.8rem;
    border-radius: 0 10px 0 8px;
    opacity: 0;
}
.sap-preview-remove--image:hover { background: rgba(200, 40, 40, 0.85); color: #fff; }
html[data-theme="light"] .sap-preview-item--doc {
    background: #f9fafb;
    border-color: rgba(0, 0, 0, 0.1) !important;
}
html[data-theme="light"] .sap-preview-item--doc:hover {
    background: #f3f4f6;
    border-color: rgba(0, 0, 0, 0.18) !important;
}
html[data-theme="light"] .sap-preview-item--image {
    border-color: color-mix(in srgb, var(--primary, #5b4cdb) 20%, transparent);
}
html[data-theme="light"] .sap-preview-name { color: #111827; }
html[data-theme="light"] .sap-preview-ext { color: #6b7280; }

/* ── File-type popup (above toolbar) ── */
.solve-attach-popup {
    position: absolute;
    top: -4px;
    left: 14px;
    transform: translateY(-100%);
    background: var(--bg-card, #171717);
    border: 1px solid var(--border-subtle, #2c2c2c);
    border-radius: 10px;
    padding: 4px;
    z-index: 50;
    min-width: 160px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.35);
}
.sap-option {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 8px 12px;
    border: none;
    border-radius: 7px;
    background: transparent;
    color: var(--text-primary, inherit);
    font-size: 0.82rem;
    font-family: var(--font-body, inherit);
    text-align: left;
    cursor: pointer;
    transition: background 0.12s;
}
.sap-option svg { flex-shrink: 0; }
.sap-option:hover { background: var(--bg-hover, #1e1e1e); }
html[data-theme="light"] .solve-attach-popup { background: #fff; border-color: #e5e7eb; box-shadow: 0 4px 20px rgba(0,0,0,0.1); }
html[data-theme="light"] .sap-option { color: #111; }
html[data-theme="light"] .sap-option:hover { background: #f3f4f6; }

/* ─── Light mode overrides ────────────────────────────────────────────────── */
html[data-theme="light"] .solve-subjects-wrap::before {
    background: linear-gradient(to right, var(--bg-base, #f5f5f5), transparent);
}
html[data-theme="light"] .solve-subjects-wrap::after {
    background: linear-gradient(to left, var(--bg-base, #f5f5f5), transparent);
}
html[data-theme="light"] .solve-drop-zone { background: #fafafa; border-color: #d1d5db; }
html[data-theme="light"] .solve-input-card { background: #fff; border-color: #e5e7eb; box-shadow: 0 2px 16px rgba(0,0,0,0.08); }
html[data-theme="light"] .sv-text--ai { color: #1e293b; }
html[data-theme="light"] .sv-text--ai .prose h2,
html[data-theme="light"] .sv-text--ai .prose h3,
html[data-theme="light"] .sv-text--ai .prose h4 { color: var(--text-primary); }
html[data-theme="light"] .sv-text--ai code { background: rgba(0,0,0,0.06); color: var(--text-primary); }
html[data-theme="light"] .sv-text--ai pre { background: var(--bg-secondary); border-color: var(--border); }
html[data-theme="light"] .sv-text--ai pre code { color: var(--text-primary); }
html[data-theme="light"] .sv-text--ai blockquote { color: var(--text-muted); }
html[data-theme="light"] .sv-text--ai hr { border-top-color: var(--border); }
html[data-theme="light"] .sv-text--ai th {
    background: rgba(0,0,0,0.04);
    color: var(--text-primary);
    border-bottom-color: var(--border);
}
html[data-theme="light"] .sv-text--ai td {
    color: var(--text-secondary);
    border-bottom-color: var(--border);
}
html[data-theme="light"] .sv-text--ai strong { color: var(--text-primary); }
html[data-theme="light"] .sv-text--ai a { color: var(--primary); }
html[data-theme="light"] .solve-thinking-toggle { background: #d1d5db; }
html[data-theme="light"] .chat-editor { background: #fff; border-color: #e5e7eb; box-shadow: 0 1px 6px rgba(0,0,0,0.06); }
html[data-theme="light"] .chat-editor:focus-within { border-color: #d1d5db; }
html[data-theme="light"] .publisher-shortcut { border-color: rgba(0,0,0,0.08); }
html[data-theme="light"] .publisher-shortcut-btn { border-color: rgba(0,0,0,0.08); color: #6b7280; }
html[data-theme="light"] .publisher-shortcut-btn:hover { background: rgba(0,0,0,0.03); color: #111827; }
html[data-theme="light"] .chat-action-btn.is-recording { background: rgba(239,68,68,0.1); color: #ef4444; }
html[data-theme="light"] .solve-float-new { background: #fff; border-color: #e5e7eb; }
html[data-theme="light"] .solve-pill { color: #000; border-color: #d1d5db; background: #fafafa; }
html[data-theme="light"] .solve-pill:hover { background: #f0f0f0; }
html[data-theme="light"] .solve-pill.active {
    border-color: var(--pill-color, var(--primary, #7c6cfa));
    color: var(--pill-color, var(--primary, #7c6cfa));
    background: color-mix(in srgb, var(--pill-color, var(--primary, #7c6cfa)) 12%, transparent);
}


/* ─── Mobile ──────────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
    .solve-page { overflow: hidden; }
    .solve-headline { font-size: 1.35rem; margin-bottom: 22px; }
    .solve-idle {  padding-left: 16px; padding-right: 16px; padding-bottom: 20px; }
    .solve-subjects-outer { max-width: 100%; }
    .solve-input-card,
    .chat-editor { width: 100%; }
    .publisher-shortcut { width: 100%; }
    .solve-drop-zone { width: 90%; height: 90px; border-radius: 18px; }
    .solve-drop-zone p { font-size: 0.78rem; }
    .solve-textarea { font-size: 1rem; line-height: 1.5; }
    .chat-input { font-size: 0.9rem; line-height: 1.5; }
    .solve-input-row .solve-thinking-label span { font-size: 0.75rem; }
    .sv-bubble--user { max-width: 90%; font-size: 0.9375rem; line-height: 1.55; }
    .sv-text--ai { max-width: 96%; font-size: 0.9375rem; line-height: 1.65; }
    .solve-thread-wrap { padding: 12px 34px 8px; }
    .chat-editor {
        margin: 10px auto;
        width: calc(100% - 24px);
    }
    .publisher-shortcut {
        width: calc(100% - 24px);
    }
    .chat-editor-action {
        padding-bottom: calc(10px + env(safe-area-inset-bottom, 0px));
    }
    .solve-chat-header { padding: 10px 12px; }
    .solve-chat-header .sv-subject-label { font-size: 0.7rem; padding: 4px 10px; }
    .sv-text--ai .prose { font-size: 0.9375rem; line-height: 1.65; }
    .sv-bubble--thinking { font-size: 0.9rem; line-height: 1.5; }
    .solve-attach-preview { max-width: 100%; padding: 0 12px; }
    /* Question cards mobile */
    .sq-question .prose { font-size: 0.92rem; }
    .sq-opt { font-size: 0.875rem; padding: 8px 12px; }
    .sq-input { font-size: 0.875rem; }
    .sq-solution > .prose,
    .sq-step { padding: 16px 16px; }
    .sq-step-title { font-size: 0.95rem; }
    .sq-step-body .prose { font-size: 0.95rem; }
}

/* ═══════════════════════════════════════════════════════════════════════════════
   HUB VIEW — mode cards + saved packs
   ═══════════════════════════════════════════════════════════════════════════════ */
.solve-hub {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    overflow-y: auto;
    min-height: 0;
    padding-top: min(12vh, 100px);
    padding-left: 32px;
    padding-right: 32px;
    padding-bottom: 40px;
}

.solve-hub-msg {
    color: var(--text-muted, #888);
    font-size: 0.875rem;
    margin-bottom: 8px;
    text-align: center;
}

.sv-error-message {
    color: var(--danger, #e74c3c);
    font-size: 0.9rem;
    text-align: center;
    margin-top: 16px;
}

/* ── Mode cards ── */
.solve-mode-cards {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    max-width: 720px;
    margin-bottom: 40px;
    padding: 0px 50px;
}

.solve-mode-card {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 20px;
    border-radius: 20px;
    border: 1px solid var(--border-subtle, rgba(255,255,255,0.07));
    background: var(--bg-card, #161616);
    color: var(--text-primary, inherit);
    cursor: pointer;
    text-align: left;
    font-family: var(--font-body, inherit);
    transition: border-color 0.15s, background 0.15s, transform 0.12s;
    -webkit-tap-highlight-color: transparent;
}
.solve-mode-card:hover {
    border-color: var(--primary, #7c6cfa);
    background: color-mix(in srgb, var(--primary, #7c6cfa) 6%, var(--bg-card, #161616));
}
.solve-mode-card:active {
    transform: translateY(0);
}
.solve-mode-card__icon {
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary, #e5e7eb);
}
.solve-mode-card__icon--generate { background: var(--bg-hover) }
.solve-mode-card__icon--extract { background:var(--bg-hover); }
.solve-mode-card__icon--chat { background: var(--bg-hover); }
.solve-mode-card__text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
    flex: 1;
}
.solve-mode-card__title {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-primary, #e5e7eb);
    line-height: 1.3;
}
.solve-mode-card__desc {
    font-size: 0.76rem;
    color: var(--text-muted, #9ca3af);
    line-height: 1.35;
}
.solve-mode-card__arrow {
    flex-shrink: 0;
    color: var(--text-muted, #9ca3af);
    transition: transform 0.15s, color 0.15s;
}
.solve-mode-card:hover .solve-mode-card__arrow {
    color: var(--primary, #7c6cfa);
    transform: translateX(2px);
}

/* ── Saved packs section (used on dashboard) ── */
.solve-packs-section {
    width: 100%;
    max-width: 720px;
}
.solve-packs-heading {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted, #6b7280);
    margin: 0 0 14px;
}
.solve-packs-empty {
    text-align: center;
    color: var(--text-muted, #6b7280);
    font-size: 0.85rem;
    padding: 2rem 0;
    max-width: 720px;
    width: 100%;
}

/* ── Loading bar ── */
.solve-loading {
    width: 100%;
    height: 3px;
    background: var(--border-subtle, rgba(255,255,255,0.07));
    border-radius: 99px;
    overflow: hidden;
    position: relative;
}
.solve-loading__fill {
    height: 100%;
    width: 30%;
    background: var(--primary, #7c6cfa);
    border-radius: 99px;
    position: absolute;
    animation: solveLoadingSlide 1.2s ease-in-out infinite;
}
@keyframes solveLoadingSlide {
    0% { left: -30%; }
    100% { left: 100%; }
}

/* ═══════════════════════════════════════════════════════════════════════════════
   CONFIG MODAL
   ═══════════════════════════════════════════════════════════════════════════════ */
.solve-config-overlay {
    position: fixed;
    inset: 0;
    z-index: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.55);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}
html[data-theme="light"] .solve-config-overlay { background: rgba(0,0,0,0.25); }
.solve-config-overlay--open {
    opacity: 1;
    pointer-events: auto;
}
.solve-config-overlay--closed {
    opacity: 0;
    pointer-events: none;
}
.solve-config__backdrop {
    position: absolute;
    inset: 0;
}
.solve-config__panel {
    position: relative;
    width: min(520px, 92vw);
    max-height: min(90vh, 540px);
    min-height: 340px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-modal);
    overflow: hidden;
}
.solve-config__header {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 22px 24px 0;
    flex-shrink: 0;
}
.solve-config__header-text { flex: 1; }
.solve-config__title {
    font-size: 1.1rem;
    font-weight: 700;
    font-family: var(--font-display, inherit);
    color: var(--text-primary, #e5e7eb);
    margin: 0 0 2px;
    letter-spacing: -0.01em;
}
.solve-config__sub {
    font-size: 0.78rem;
    color: var(--text-muted, #9ca3af);
    margin: 0;
    line-height: 1.4;
}
.solve-config__close {
    flex-shrink: 0;
    width: 30px;
    height: 30px;
    border: none;
    border-radius: 50%;
    background: transparent;
    color: var(--text-muted, #9ca3af);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: background 0.12s, color 0.12s;
}
.solve-config__close:hover { background: var(--bg-hover, #252525); color: var(--text-primary, inherit); }

.solve-config__body {
    flex: 1;
    overflow-y: auto;
    padding: 20px 24px 0;
    display: flex;
    flex-direction: column;
}

.solve-config__step1-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.solve-config__step {
  display: none;
  flex-direction: column;
  gap: 5px;
  flex: 1;
}
.solve-config__step--active { display: flex; }
.solve-config__label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary, #a1a1aa);
    letter-spacing: 0.02em;
    margin: 0;
}
.solve-gen-grid {
  display: flex;
  gap: 10px;
  justify-content: center;
  width: 100%;
  max-width: 340px;
  margin: 20px auto;
}

.solve-gen-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 14px 16px;
  min-width: 88px;
  flex: 1;
  border-radius: 12px;
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
  user-select: none;
}

.solve-gen-card:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--bg-hover);
}

.solve-gen-card:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.solve-gen-card--selected {
  border-color: var(--primary);
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 10%, transparent);
}

.solve-gen-card--selected:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 10%, transparent);
}

.solve-gen-value {
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1;
}

.solve-gen-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 500;
}

.solve-gen-card--selected .solve-gen-label {
  color: var(--primary);
}

.solve-gen-card--locked {
  opacity: 0.5;
  cursor: default;
  pointer-events: auto;
  position: relative;
}
.solve-gen-card--locked::after {
  content: 'Upgrade';
  position: absolute;
  bottom: -7px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.58rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--primary);
  background: color-mix(in srgb, var(--primary), transparent 88%);
  border: 1px solid color-mix(in srgb, var(--primary), transparent 70%);
  border-radius: 99px;
  padding: 1px 6px;
  white-space: nowrap;
  pointer-events: none;
}
.solve-gen-card--locked:hover {
  opacity: 0.75;
}
.solve-config-dropzone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 160px;
    padding: 24px;
    border: 2px dashed var(--border-subtle, rgba(255,255,255,0.07));
    border-radius: 12px;
    color: var(--text-muted, #9ca3af);
    font-size: 0.78rem;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
    user-select: none;
}
.solve-config-dropzone:hover {
    border-color: var(--primary, #7c6cfa);
    background: color-mix(in srgb, var(--primary, #7c6cfa) 4%, transparent);
    color: var(--primary, #7c6cfa);
}
.solve-config__error {
    font-size: 0.78rem;
    color: var(--error-red, #ef4444);
    margin: 0;
    min-height: 1em;
}

.solve-config__step-dots {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 24px 20px;
    flex-shrink: 0;
}
.solve-config__dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--text-muted, #585858);
    transition: background 0.2s;
}
.solve-config__dot--active { background: var(--primary, #7c6cfa); }

.solve-config__next {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 12px;
    border-radius: 10px;
    border: none;
    background: var(--primary, #7c6cfa);
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font-body, inherit);
    cursor: pointer;
    transition: opacity 0.15s;
    width: 60%;
    margin: 0 auto;
}
.solve-config__next:disabled { opacity: 0.4; cursor: not-allowed; }
.solve-config__next:not(:disabled):hover { opacity: 0.88; }

.solve-config__submit {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 4px;
    padding: 12px;
    border-radius: 10px;
    border: none;
    background: var(--primary, #7c6cfa);
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font-body, inherit);
    cursor: pointer;
    width: 60%;
    margin: 0 auto;
    transition: opacity 0.15s;
}
.solve-config__submit:disabled { opacity: 0.4; cursor: not-allowed; }
.solve-config__submit:not(:disabled):hover { opacity: 0.88; }

/* ═══════════════════════════════════════════════════════════════════════════════
   EXTRACT RING LOADER
   ═══════════════════════════════════════════════════════════════════════════════ */
.solve-ring-wrap {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 120px;
    height: 120px;
    margin: 20px auto 8px;
}
.solve-ring {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}
.solve-ring__bg {
    fill: none;
    stroke: var(--border-subtle);
    stroke-width: 6;
}
.solve-ring__fill {
    fill: none;
    stroke: var(--primary);
    stroke-width: 6;
    stroke-linecap: round;
    stroke-dasharray: 264;
    stroke-dashoffset: 264;
    transition: stroke-dashoffset 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.solve-ring__fill--spinning {
    animation: solveRingSpin 1s linear infinite;
    stroke-dasharray: 60, 204;
    stroke-dashoffset: 0;
    transform-origin: center;
}
@keyframes solveRingSpin {
    0%   { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.solve-ring__fill--processing {
    animation: solveRingPulse 2s ease-in-out infinite;
}
.solve-ring__fill--pulsing {
    animation: solveRingPulseRing 1.5s ease-in-out infinite;
}
@keyframes solveRingPulse {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.55; }
}
@keyframes solveRingPulseRing {
    0%, 100% { opacity: 1; stroke-width: 6; }
    50%      { opacity: 0.5; stroke-width: 8; }
}
.solve-ring__text {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
}
.solve-ring__pct {
    font-size: 1.4rem;
    font-weight: 700;
    font-family: var(--font-display);
    color: var(--text-primary);
    line-height: 1;
}
.solve-ring__label {
    font-size: 0.65rem;
    color: var(--text-muted);
    line-height: 1;
}
.solve-config__extract-start {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 16px;
    padding: 12px;
    border-radius: 10px;
    border: none;
    background: var(--primary);
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font-body);
    cursor: pointer;
    width: 60%;
    margin-left: auto;
    margin-right: auto;
    transition: opacity 0.15s;
}
.solve-config__extract-start:hover { opacity: 0.88; }

/* ═══════════════════════════════════════════════════════════════════════════════
   QUIZ TAKER — summary actions
   ═══════════════════════════════════════════════════════════════════════════════ */
.sq-summary-actions {
    display: flex;
    gap: 10px;
    margin-top: 16px;
    flex-wrap: wrap;
}
.sq-back-btn {
    padding: 8px 20px;
    border-radius: 20px;
    border: 1px solid var(--border-subtle, rgba(255,255,255,0.07));
    background: transparent;
    color: var(--text-muted, #9ca3af);
    font-size: 0.82rem;
    font-weight: 500;
    font-family: var(--font-body, inherit);
    cursor: pointer;
    transition: color 0.15s, background 0.15s;
}
.sq-back-btn:hover { color: var(--text-primary, inherit); background: var(--bg-hover, #1e1e1e); }

/* ── Pack header title in chat state ── */
.sv-header-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-primary, #e5e7eb);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    text-align: center;
    margin: 0 8px;
}
.solve-chat-header--with-title .sv-subject-label {
    flex-shrink: 0;
}

/* ═══ DEDICATED QUIZ INTERFACE ═══ */
.solve-quiz {
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  background: var(--bg-page, #0e0e0e);
}

/* ── Quiz header ── */
.qz-header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  padding: 0 16px;
  height: 48px;
  gap: 8px;
  border-bottom: 1px solid var(--border-subtle, rgba(255,255,255,0.07));
}
.qz-header__left {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
}
.qz-subject {
  font-family: var(--font-display, 'Space Grotesk', sans-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary, #f0ede8);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.qz-header__center {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.qz-header__right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex: 1;
  gap: 6px;
}
.qz-chip-score {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .04em;
  padding: 3px 10px;
  border-radius: 100px;
  white-space: nowrap;
  border: 1px solid var(--border-subtle, rgba(255,255,255,0.07));
  background: rgba(34,197,94,0.08);
  color: #22c55e;
  border-color: rgba(34,197,94,0.2);
  font-variant-numeric: tabular-nums;
}
.qz-restart-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 11px;
  border-radius: var(--radius-sm, 8px);
  background: var(--bg-hover, rgba(255,255,255,0.04));
  border: 1px solid var(--border-subtle, rgba(255,255,255,0.07));
  color: var(--text-muted, rgba(240,237,232,0.32));
  font-family: var(--font-body, 'DM Sans', sans-serif);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all .12s;
  white-space: nowrap;
}
.qz-restart-btn:hover {
  background: rgba(255,255,255,0.08);
  color: var(--text-primary, #f0ede8);
}

/* ── Progress bar ── */
.qz-progress {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
}
.qz-progress__track {
  flex: 1;
  height: 3px;
  border-radius: 3px;
  background: var(--border-subtle, rgba(255,255,255,0.07));
  overflow: hidden;
}
.qz-progress__fill {
  height: 100%;
  background: var(--primary, #7c6cfa);
  border-radius: 3px;
  transition: width .3s ease;
  width: 0%;
}
.qz-progress__label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted, rgba(240,237,232,0.32));
  min-width: 32px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ── Scrollable question area ── */
.qz-scroll {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-bottom: 4px;
}
.qz-scroll::-webkit-scrollbar { width: 4px; }
.qz-scroll::-webkit-scrollbar-track { background: transparent; }
.qz-scroll::-webkit-scrollbar-thumb { background: var(--border-subtle, rgba(255,255,255,0.07)); border-radius: 4px; }


.qz-block {
  padding: 20px 16px 12px;
}

.qz-eye {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--text-muted, rgba(240,237,232,0.32));
  margin-bottom: 10px;
}

.qz-text {
  font-family: var(--font-body, 'DM Sans', sans-serif);
  font-size: 15px;
  line-height: 1.55;
  color: var(--text-primary, #f0ede8);
  margin-bottom: 18px;
  overflow-wrap: break-word;
  word-break: break-word;
}
.qz-text .prose p { margin: 0.3em 0; }

/* ── Choices ── */
.qz-choices {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.qz-choice {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  width: 100%;
  text-align: left;
  padding: 11px 14px;
  border: 1.5px solid var(--border-subtle, rgba(255,255,255,0.07));
  border-radius: var(--radius-md, 12px);
  background: var(--bg-card, #161616);
  font-family: var(--font-body, 'DM Sans', sans-serif);
  cursor: pointer;
  transition: border-color .12s, background .12s, transform .12s;
}
.qz-choice:not(:disabled):hover {
  border-color: var(--primary, #7c6cfa);
  background: var(--primary-soft, rgba(124,108,250,0.08));
  transform: scale(1.02);
}
.qz-choice:disabled {
  cursor: default;
}
.qz-choice--selected {
  border-color: var(--primary, #7c6cfa);
  background: var(--primary-soft, rgba(124,108,250,0.08));
}
.qz-choice--correct {
  border-color: rgba(34,197,94,0.3);
  background: rgba(34,197,94,0.08);
}
.qz-choice--wrong {
  border-color: rgba(239,68,68,0.3);
  background: rgba(239,68,68,0.08);
}
.qz-choice--dimmed {
  opacity: .32;
}

.qz-bub {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  border: 1.5px solid var(--border-subtle, rgba(255,255,255,0.07));
  color: var(--text-muted, rgba(240,237,232,0.32));
  background: var(--bg-hover, rgba(255,255,255,0.04));
  margin-top: 1px;
  transition: all .12s;
}
.qz-choice--selected .qz-bub {
  background: var(--primary, #7c6cfa);
  border-color: var(--primary, #7c6cfa);
  color: #fff;
}
.qz-choice--correct .qz-bub {
  background: #22c55e;
  border-color: #22c55e;
  color: #fff;
}
.qz-choice--wrong .qz-bub {
  background: #ef4444;
  border-color: #ef4444;
  color: #fff;
}

.qz-choice-text {
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary, #f0ede8);
  flex: 1;
  min-width: 0;
  overflow-wrap: break-word;
  word-break: break-word;
}
.qz-choice--selected .qz-choice-text {
  color: var(--primary, #7c6cfa);
}
.qz-choice--correct .qz-choice-text {
  color: #22c55e;
}
.qz-choice--wrong .qz-choice-text {
  color: #ef4444;
}

/* ── Per-option explanations ── */
.qz-choice-wrapper {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.qz-choice-exp {
  font-size: 13px;
  line-height: 1.55;
  padding: 6px 0 10px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--border, rgba(128,128,128,0.15));
  overflow-wrap: break-word;
  word-break: break-word;
  color: var(--sr-muted, #999);
}
.qz-choice-exp .prose p { margin: 0.3em 0; }
.qz-choice-exp .prose p:first-child { margin-top: 0; }
.qz-choice-exp .prose p:last-child { margin-bottom: 0; }
.qz-choice-exp .prose br + br { display: block; content: ''; margin-top: 0.2em; }

/* ── General solution ── */
.qz-solution {
  margin-top: 20px;
  padding: 16px 18px;
  border-radius: 12px;
  background: var(--bg-card, #161616);
  border: 1px solid var(--border-subtle, rgba(255,255,255,0.07));
  animation: qz-solution-in 0.3s ease-out both;
  max-width: 600px;
  width: 100%;
  box-sizing: border-box;
}
@keyframes qz-solution-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.qz-solution__head {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--primary, #7c6cfa);
  margin-bottom: 8px;
}
.qz-solution__body {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary, #d4d4d4);
  overflow-wrap: break-word;
  word-break: break-word;
}
.qz-solution__body .prose p { margin: 0.6em 0; }
html[data-theme="light"] .qz-solution { background: #ffffff; border-color: rgba(0,0,0,0.08); }
html[data-theme="light"] .qz-solution__body { color: #1e293b; }

/* ── Question Map ── */
.qz-map-section {
  padding: 6px 16px 16px;
}
.qz-map-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-muted, rgba(240,237,232,0.32));
  margin-bottom: 8px;
}
.qz-map-scroll {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 3px 0 6px;
}
.qz-map-scroll::-webkit-scrollbar { height: 4px; }
.qz-map-scroll::-webkit-scrollbar-track { background: transparent; }
.qz-map-scroll::-webkit-scrollbar-thumb { background: var(--border-subtle, rgba(255,255,255,0.07)); border-radius: 4px; }
.qz-map-row {
  display: flex;
  gap: 5px;
  width: max-content;
}
.qz-map-box {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm, 8px);
  font-size: 10px;
  font-weight: 700;
  cursor: pointer;
  border: 1.5px solid transparent;
  transition: transform .12s cubic-bezier(0.23, 1, 0.32, 1);
  font-family: var(--font-body, 'DM Sans', sans-serif);
}
.qz-map-box:hover { transform: scale(1.1); z-index: 1; }
.qz-map-box--unvisited {
  background: var(--bg-hover, rgba(255,255,255,0.04));
  color: var(--text-muted, rgba(240,237,232,0.32));
  border-color: var(--border-subtle, rgba(255,255,255,0.07));
}
.qz-map-box--visited {
  background: rgba(234,179,8,0.08);
  color: #eab308;
  border-color: rgba(234,179,8,0.2);
}
.qz-map-box--correct {
  background: #22c55e;
  color: #fff;
  border-color: #22c55e;
}
.qz-map-box--wrong {
  background: #ef4444;
  color: #fff;
  border-color: #ef4444;
}
.qz-map-box--active {
  outline: 2.5px solid var(--primary, #7c6cfa);
  outline-offset: 2px;
}

/* ── Bottom nav ── */
.qz-nav {
  flex-shrink: 0;
  background: transparent;
  border-top: 1px solid var(--border-subtle, rgba(255,255,255,0.07));
  padding: 8px 16px;
  display: flex;
  gap: 9px;
  position: sticky;
  bottom: 0;
}
.qz-nav-btn {
  flex: 1;
  padding: 10px 8px;
  font-family: var(--font-body, 'DM Sans', sans-serif);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-md, 12px);
  border: 1.5px solid var(--border-subtle, rgba(255,255,255,0.07));
  background: var(--bg-card, #161616);
  color: var(--text-primary, #f0ede8);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: background var(--anim-dur-micro, 150ms) ease,
              color var(--anim-dur-micro, 150ms) ease,
              border-color var(--anim-dur-micro, 150ms) ease,
              transform var(--anim-dur-micro, 150ms) var(--anim-ease-out, cubic-bezier(0.23, 1, 0.32, 1)),
              box-shadow var(--anim-dur-micro, 150ms) ease;
}
.qz-nav-btn:hover:not(:disabled) {
  background: var(--bg-hover, rgba(255,255,255,0.04));
  border-color: var(--border-hover, rgba(255,255,255,0.15));
}
.qz-nav-btn:active:not(:disabled) {
  transform: scale(0.97);
}
.qz-nav-btn:disabled {
  opacity: .5;
  pointer-events: none;
}
.qz-nav-btn--primary {
  background: var(--btn-bg, #7c6cfa);
  border-color: var(--btn-border, #7c6cfa);
  color: var(--btn-text, #fff);
  box-shadow: var(--shadow-sm, 0 1px 3px rgba(0,0,0,0.06));
}
.qz-nav-btn--primary:hover:not(:disabled) {
  background: var(--btn-hover-bg, #6a5ae8);
  transform: translateY(-1px);
  box-shadow: var(--shadow-card-hover, 0 2px 4px rgba(0,0,0,0.20), 0 8px 24px rgba(0,0,0,0.40));
}

/* ── Nav center indicator (desktop) ── */
.qz-nav-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}
.qz-nav-counter {
  display: none;
}
.qz-enter-hint {
  text-align: center;
  font-family: var(--font-body, 'DM Sans', sans-serif);
  font-size: 0.8rem;
  color: var(--text-primary, #f0ede8);
  opacity: 0.35;
  pointer-events: none;
}
.qz-enter-hint kbd {
  font-family: inherit;
  padding: 2px 6px;
  border: 1px solid var(--border, rgba(255,255,255,0.07));
  border-radius: 4px;
  font-size: 0.75em;
}
.qz-enter-hint.active {
  opacity: 1;
}

/* ── Share button ── */
.qz-share-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 11px;
  border-radius: var(--radius-sm, 8px);
  background: var(--bg-hover, rgba(255,255,255,0.04));
  border: 1px solid var(--border-subtle, rgba(255,255,255,0.07));
  color: var(--text-muted, rgba(240,237,232,0.32));
  font-family: var(--font-body, 'DM Sans', sans-serif);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all .12s;
  white-space: nowrap;
}
.qz-share-btn:hover {
  background: rgba(255,255,255,0.08);
  color: var(--text-primary, #f0ede8);
}

/* ── Summary ── */
.qz-summary {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 48px 24px;
  text-align: center;
  gap: 0;
}

.qz-summary__ring-wrap {
  position: relative;
  width: 124px;
  height: 124px;
  margin-bottom: 20px;
}

.qz-summary__ring {
  transform: rotate(-90deg);
  width: 100%;
  height: 100%;
}

.qz-summary__ring-bg {
  stroke: var(--border-subtle, rgba(255,255,255,0.07));
}

.qz-summary__ring-fill {
  stroke: var(--primary, #7c6cfa);
  transition: stroke-dashoffset 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}
.qz-summary__ring-fill--perfect { stroke: #10b981; }
.qz-summary__ring-fill--low { stroke: #ef4444; }

.qz-summary__ring-label {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

.qz-summary__pct {
  font-family: var(--font-display, 'Space Grotesk', system-ui, sans-serif);
  font-size: 1.65rem;
  font-weight: 800;
  line-height: 1;
  color: var(--text-primary, #f0ede8);
  letter-spacing: -0.02em;
}

.qz-summary__score {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted, rgba(240,237,232,0.32));
  line-height: 1;
}

.qz-summary__verdict {
  font-family: var(--font-display, 'Space Grotesk', system-ui, sans-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary, #f0ede8);
  margin-bottom: 32px;
  letter-spacing: -0.01em;
}

.qz-summary__actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
  max-width: 220px;
}

.qz-summary__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px 16px;
  border-radius: var(--radius-md, 12px);
  font-family: var(--font-body, 'DM Sans', system-ui, sans-serif);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid var(--border-subtle, rgba(255,255,255,0.07));
  background: var(--bg-card, #161616);
  color: var(--text-primary, #f0ede8);
  transition: background .15s ease, border-color .15s ease, transform .12s cubic-bezier(0.23, 1, 0.32, 1);
  -webkit-tap-highlight-color: transparent;
}
.qz-summary__btn:active {
  transform: scale(0.97);
}

.qz-summary__btn--retake,
.qz-summary__btn--review {
  border-color: var(--primary, #7c6cfa);
  color: var(--primary, #7c6cfa);
  background: rgba(124,108,250,0.08);
}
.qz-summary__btn--retake:hover,
.qz-summary__btn--review:hover {
  background: rgba(124,108,250,0.14);
}

.qz-summary__btn--hub,
.qz-summary__btn--share {
  border: none;
  background: transparent;
  color: var(--text-muted, rgba(240,237,232,0.32));
}
.qz-summary__btn--hub:hover,
.qz-summary__btn--share:hover {
  color: var(--text-primary, #f0ede8);
}

/* ── Light mode overrides ── */
html[data-theme="light"] .qz-subject { color: var(--text-primary, #1c1917); }
html[data-theme="light"] .qz-text { color: #1c1917; }
html[data-theme="light"] .qz-choice { background: #ffffff; border-color: rgba(0,0,0,0.08); }
html[data-theme="light"] .qz-choice:not(:disabled):hover { border-color: var(--primary, #5b4cdb); background: rgba(91,76,219,0.06); }
html[data-theme="light"] .qz-choice--selected { border-color: var(--primary, #5b4cdb); background: rgba(91,76,219,0.06); }
html[data-theme="light"] .qz-choice--correct { border-color: rgba(34,197,94,0.4); background: rgba(34,197,94,0.06); }
html[data-theme="light"] .qz-choice--wrong { border-color: rgba(239,68,68,0.4); background: rgba(239,68,68,0.06); }
html[data-theme="light"] .qz-bub { background: rgba(0,0,0,0.05); border-color: rgba(0,0,0,0.12); color: #6b7280; }
html[data-theme="light"] .qz-choice--selected .qz-bub { background: var(--primary, #5b4cdb); border-color: var(--primary, #5b4cdb); color: #fff; }
html[data-theme="light"] .qz-choice--correct .qz-bub { background: #22c55e; border-color: #22c55e; color: #fff; }
html[data-theme="light"] .qz-choice--wrong .qz-bub { background: #ef4444; border-color: #ef4444; color: #fff; }
html[data-theme="light"] .qz-choice-text { color: #1c1917; }
html[data-theme="light"] .qz-choice--selected .qz-choice-text { color: var(--primary, #5b4cdb); }
html[data-theme="light"] .qz-choice--correct .qz-choice-text { color: #15803d; }
html[data-theme="light"] .qz-choice--wrong .qz-choice-text { color: #b91c1c; }
html[data-theme="light"] .qz-chip-score { background: rgba(34,197,94,0.06); color: #15803d; border-color: rgba(34,197,94,0.3); }
html[data-theme="light"] .qz-map-box--unvisited { background: rgba(0,0,0,0.04); color: #6b7280; border-color: rgba(0,0,0,0.08); }
html[data-theme="light"] .qz-summary__pct { color: var(--text-primary, #1c1917); }
html[data-theme="light"] .qz-summary__score { color: #6b7280; }
html[data-theme="light"] .qz-summary__verdict { color: var(--text-primary, #1c1917); }
html[data-theme="light"] .qz-summary__btn--hub { color: #6b7280; }
html[data-theme="light"] .qz-summary__btn--hub:hover { color: #1c1917; }
html[data-theme="light"] .qz-restart-btn { background: rgba(0,0,0,0.04); color: #6b7280; }
html[data-theme="light"] .qz-restart-btn:hover { background: rgba(0,0,0,0.08); color: #1c1917; }
html[data-theme="light"] .qz-share-btn { background: rgba(0,0,0,0.04); color: #6b7280; }
html[data-theme="light"] .qz-share-btn:hover { background: rgba(0,0,0,0.08); color: #1c1917; }
html[data-theme="light"] .qz-enter-hint { color: #1c1917; }
html[data-theme="light"] .qz-enter-hint kbd { border-color: rgba(0,0,0,0.15); }
html[data-theme="light"] .qz-nav-counter { color: #6b7280; }

/* ── Hub mobile ── */
@media (max-width: 640px) {
    .solve-hub { padding-left: 16px; padding-right: 16px;}
    .solve-mode-cards { flex-direction: column; gap: 10px; margin-bottom: 28px; padding: 0px 10px; }
    .solve-mode-card { padding: 14px 16px; }
    .solve-mode-card__icon { width: 36px; height: 36px; }
    .solve-mode-card__title { font-size: 0.85rem; }
    .solve-mode-card__desc { font-size: 0.72rem; }
    .solve-config__panel { max-height: 94vh; border-radius: 16px; padding: 5px; }
    .solve-config__body { padding: 16px; gap: 14px; }
    .solve-config__header { padding: 18px 16px 0; }
    .solve-config__step-dots { padding: 10px 16px 16px; }
}
/* ── Question navigation slide animations ── */
@keyframes qz-exit-left {
  0%   { opacity: 1; transform: translateX(0); }
  100% { opacity: 0; transform: translateX(-30px); }
}
@keyframes qz-exit-right {
  0%   { opacity: 1; transform: translateX(0); }
  100% { opacity: 0; transform: translateX(30px); }
}
@keyframes qz-enter-left {
  0%   { opacity: 0; transform: translateX(30px); }
  100% { opacity: 1; transform: translateX(0); }
}
@keyframes qz-enter-right {
  0%   { opacity: 0; transform: translateX(-30px); }
  100% { opacity: 1; transform: translateX(0); }
}
.qz-anim-exit-left   { animation: qz-exit-left   180ms ease-in both; will-change: transform, opacity; }
.qz-anim-exit-right  { animation: qz-exit-right  180ms ease-in both; will-change: transform, opacity; }
.qz-anim-enter-left  { animation: qz-enter-left  220ms ease-out both; will-change: transform, opacity; }
.qz-anim-enter-right { animation: qz-enter-right 220ms ease-out both; will-change: transform, opacity; }

/* ── Summary fade-up ── */
@keyframes qz-summary-in {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
.qz-summary--enter { animation: qz-summary-in 320ms ease-out both; }

/* ── Desktop quiz layout ── */
@media (min-width: 1024px) {
  .solve-quiz {
    width: 100%;
    margin: 0 auto;
  }
  .qz-scroll {
    flex: 1;
    min-height: 0;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 220px;
    grid-template-rows: 1fr auto;
    overflow: hidden;
    padding: 0px 50px 0px 0px;
  }
  .qz-block {
    min-width: 750px;
    min-height: 0;
    overflow-y: auto;
    padding: 28px 150px;
    margin-top: 48px;
    display: flex;
    flex-direction: column;
    scrollbar-width: none;
  }
  .qz-stage {
    flex: 1;
  }
  .qz-stage .qz-eye {
    font-size: 12px;
    margin-bottom: 14px;
  }
  .qz-progress {
    display: none;
  }
  .qz-summary {
    grid-column: 1;
    grid-row: 1 / 3;
    padding: 48px 36px;
    margin: auto;
  }
  .qz-map-section {
    padding: 20px 16px 0;
    margin-top: 48px;
    overflow-y: auto;
    overflow-x: clip;
    min-height: 0;
    min-width: 230px;
    align-self: start;
    scrollbar-width: none;
  }
  .qz-nav {
    padding: 16px 36px;
    border-top: none;
    position: static;
    margin-top: 28px;
    justify-content: space-between;
    
  }
  .qz-nav .qz-nav-btn {
    flex: none;
    min-width: 120px;
  }
  .qz-nav-btn {
    padding: 12px 20px;
  }
  .qz-choice {
    padding: 15px 20px;
    gap: 14px;
  }
  .qz-text {
    font-size: 17px;
    line-height: 1.7;
  }
  .qz-map-label {
    padding: 0 0 8px 0;
    text-align: left;
    font-size: 12px;
  }
  .qz-map-scroll {
    overflow: visible;
    padding: 0;
  }
  .qz-map-row {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
    width: auto;
  }
  .qz-map-box {
    width: 100%;
    height: auto;
    aspect-ratio: 1;
    font-size: 12px;
    border-width: 2px;
  }
  .qz-map-section .qz-header {
    height: auto;
    border-bottom: none;
    flex-direction: row;
    justify-content: space-between;
    padding: 0 0 12px;
  }
  .qz-map-section .qz-header .qz-header__left {
    flex: none;
  }
  .qz-map-section .qz-header .qz-header__center {
    flex: 1;
    display: flex;
    justify-content: center;
  }
  .qz-map-section .qz-header .qz-header__right {
    flex: none;
  }
}

/* ── AI message action buttons (copy, regenerate) ─────────────────── */
.sv-msg-actions {
  display: flex;
  gap: 4px;
  margin-top: 6px;
  opacity: 0;
  transition: opacity 0.15s;
}
.sv-text--ai:hover .sv-msg-actions,
.sv-msg-actions:focus-within {
  opacity: 1;
}
.sv-msg-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-muted, #888);
  font-size: 11px;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
  white-space: nowrap;
}
.sv-msg-action-btn:hover {
  background: var(--bg-elevated, rgba(255,255,255,0.06));
  color: var(--text-primary, #e0e0e0);
}
.sv-msg-action-btn.copied {
  color: #22c55e;
}
html[data-theme="light"] .sv-msg-action-btn {
  color: #999;
}
html[data-theme="light"] .sv-msg-action-btn:hover {
  background: rgba(0,0,0,0.05);
  color: #333;
}

/* ── Video suggestion cards ────────────────────────────────────────── */
.sv-video-row {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  overflow-y: visible;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding: 4px 0 8px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.12) transparent;
}
.sv-video-row::-webkit-scrollbar { height: 4px; }
.sv-video-row::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.12); border-radius: 4px; }
html[data-theme="light"] .sv-video-row::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.12); }

.sv-video-card {
  position: relative;
  flex: 0 0 200px;
  scroll-snap-align: start;
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-elevated, rgba(255,255,255,0.04));
  border: 1px solid var(--border-subtle, rgba(255,255,255,0.06));
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s, transform 0.15s, flex 0.25s ease, max-width 0.25s ease;
  cursor: pointer;
}
.sv-video-card:hover {
  border-color: var(--primary, #5b4cdb);
  transform: translateY(-2px);
}
html[data-theme="light"] .sv-video-card {
  background: #f8f8fa;
  border-color: #e5e5e5;
}
html[data-theme="light"] .sv-video-card:hover {
  border-color: var(--primary, #5b4cdb);
}

.sv-video-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #111;
  overflow: hidden;
}
.sv-video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.sv-video-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.25);
  opacity: 0;
  transition: opacity 0.15s;
}
.sv-video-card:hover .sv-video-play {
  opacity: 1;
}
.sv-video-play-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}
.sv-video-play-icon svg {
  color: #111;
  margin-left: 2px;
}
.sv-video-duration {
  position: absolute;
  bottom: 4px;
  right: 4px;
  padding: 1px 5px;
  border-radius: 4px;
  background: rgba(0,0,0,0.78);
  color: #fff;
  font-size: 11px;
  font-weight: 500;
  line-height: 1.4;
}

.sv-video-meta {
  padding: 8px 10px 10px;
}
.sv-video-title {
  font-size: 12.5px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-primary, #e8e8e8);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0 0 3px;
}
html[data-theme="light"] .sv-video-title { color: #222; }

.sv-video-channel {
  font-size: 11px;
  color: var(--text-muted, #888);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Video card expanded/playing state ─────────────────────────────── */
.sv-video-card--playing {
  flex: 0 0 480px;
  max-width: 480px;
  border-color: var(--primary, #5b4cdb);
  cursor: default;
}
.sv-video-card--playing:hover {
  transform: none;
}

.sv-video-embed {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: 10px 10px 0 0;
  overflow: hidden;
}
.sv-video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.sv-video-close {
  position: absolute;
  top: 6px;
  right: 6px;
  z-index: 2;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 50%;
  background: rgba(0,0,0,0.65);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.12s;
  backdrop-filter: blur(4px);
}
.sv-video-close:hover {
  background: rgba(0,0,0,0.85);
}

.sv-video-card--playing .sv-video-meta {
  padding: 8px 10px 10px;
}
.sv-video-card--playing .sv-video-title {
  -webkit-line-clamp: 1;
}

@media (max-width: 640px) {
  .sv-video-card { flex: 0 0 160px; }
  .sv-video-card--playing { flex: 0 0 320px; max-width: 320px; }
}