@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500&family=Noto+Serif+JP:wght@400;600&family=M+PLUS+Rounded+1c&family=M+PLUS+1p&family=Kosugi+Maru&family=Klee+One:wght@400;600&family=Sawarabi+Gothic&family=Sawarabi+Mincho&family=Shippori+Mincho:wght@400;600&family=Zen+Kaku+Gothic+New&family=Zen+Old+Mincho&family=BIZ+UDPMincho&family=BIZ+UDPGothic&family=Hina+Mincho&family=Yomogi&family=Kaisei+Decol&family=Reggae+One&family=RocknRoll+One&family=Dela+Gothic+One&family=DotGothic16&family=Be+Vietnam+Pro:wght@400;500;600&family=Cormorant+Garamond:wght@400;600&family=Fraunces:opsz,wght@9..144,400;9..144,600&family=IBM+Plex+Mono:wght@400;500&family=IBM+Plex+Sans:wght@400;500;600&family=Literata:wght@400;500;600&family=Lora:wght@400;600&family=Merriweather:wght@400;700&family=Nunito+Sans:wght@400;600&family=Playfair+Display:wght@500;700&family=Source+Sans+3:wght@400;500;600&family=Source+Serif+4:wght@400;600&family=Space+Grotesk:wght@400;500;600&family=Space+Mono:wght@400;700&family=Spectral:wght@400;600&display=swap');
@import url('./themes.css');

/* ===================================================================
   Resonance — Layout, components, and utilities
   Theme variables live in themes.css
   =================================================================== */

/* ── Reset ──────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Scrollbars (all themes) ─────────────────────────────────────────── */
/* Webkit (Chrome, Safari, Edge) */
* {
    scrollbar-width: thin;                        /* Firefox */
    scrollbar-color: var(--border) transparent;    /* Firefox */
}

*::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

*::-webkit-scrollbar-track {
    background: transparent;
}

*::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
    transition: background 0.2s;
}

*::-webkit-scrollbar-thumb:hover {
    background: var(--text-dim);
}

*::-webkit-scrollbar-corner {
    background: transparent;
}

/* ── Global ─────────────────────────────────────────────────────────── */
html, body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    min-height: 100vh;
}

a { color: var(--accent); cursor: pointer; text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* ── Buttons ────────────────────────────────────────────────────────── */
.btn {
    display: inline-block;
    padding: 0.6rem 1.4rem;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--accent); color: var(--accent-contrast); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--bg-card); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }

/* ── NavBar ─────────────────────────────────────────────────────────── */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    height: 56px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    transition: transform 0.3s ease-in-out;
}
.navbar.hidden {
    transform: translateY(-100%);
}
.navbar-brand { display: flex; align-items: center; gap: 0.5rem; cursor: pointer; }
.navbar-logo { font-size: 1.5rem; }
.navbar-title { font-size: 1.1rem; font-weight: 700; }
.navbar-hamburger { display: none; background: none; border: none; color: var(--text-primary); font-size: 1.5rem; cursor: pointer; }
.navbar-links { display: flex; align-items: center; gap: 1rem; }
.nav-language { display: flex; align-items: center; gap: 0.5rem; }
.nav-language label { font-size: 0.9rem; color: var(--text-secondary); }
.nav-language select { padding: 0.3rem 0.5rem; border-radius: 4px; border: 1px solid var(--border); background: var(--bg-secondary); color: var(--text-primary); font-size: 0.9rem; cursor: pointer; }
.nav-language select:hover { border-color: var(--accent); }
.nav-link { color: var(--text-secondary); font-size: 0.9rem; cursor: pointer; padding: 0.3rem 0.6rem; border-radius: 6px; }
.nav-link:hover { color: var(--text-primary); background: var(--bg-card); }
.nav-user { color: var(--text-dim); font-size: 0.85rem; }
.nav-logout { color: var(--error); }
.nav-register { background: var(--accent); color: var(--accent-contrast) !important; border-radius: 6px; }
.nav-register:hover { background: var(--accent-hover); }

/* Font-size control */
.nav-font-size {
    display: flex;
    align-items: center;
    gap: 0.15rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.15rem;
}
.font-size-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 28px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-primary);
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1;
}
.font-size-btn.font-size-sm { font-size: 0.65rem; }
.font-size-btn.font-size-lg { font-size: 1.05rem; }
.font-size-btn:hover:not(:disabled) {
    background: var(--bg-secondary);
}
.font-size-btn:active:not(:disabled) {
    background: var(--accent);
    color: var(--accent-contrast);
}
.font-size-btn:disabled {
    opacity: 0.25;
    cursor: default;
}
.font-size-value {
    font-size: 0.7rem;
    color: var(--text-secondary);
    min-width: 2.2rem;
    text-align: center;
    font-variant-numeric: tabular-nums;
    user-select: none;
}

@media (max-width: 640px) {
    .navbar-hamburger { display: block; }
    .navbar-links { display: none; flex-direction: column; position: absolute; top: 56px; left: 0; right: 0; background: var(--bg-secondary); border-bottom: 1px solid var(--border); padding: 1rem; gap: 0.5rem; }
    .navbar-links.open { display: flex; }
    .nav-language { width: 100%; justify-content: space-between; padding: 0.5rem; }
    .nav-language select { flex: 1; max-width: 200px; }
}

/* ── Main Content ───────────────────────────────────────────────────── */
.main-content {max-width: 1200px;margin: 0 auto;/* padding: 1.5rem; */padding-top: 72px;}
.main-content.no-navbar { padding-top: 0; margin-top: 0; max-width: 100%; }
.loading { text-align: center; padding: 3rem; color: var(--text-dim); }
.empty { text-align: center; padding: 3rem; color: var(--text-dim); }

/* ── Catalog Grid ───────────────────────────────────────────────────── */
.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1.5rem;
}
.catalog-card {
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: var(--shadow);
}
.catalog-card:hover { transform: translateY(-4px); }
.catalog-card-image { position: relative; }
.catalog-card-image img { width: 100%; aspect-ratio: 3/4; object-fit: cover; display: block; }
.catalog-card-placeholder { width: 100%; aspect-ratio: 3/4; display: flex; align-items: center; justify-content: center; font-size: 3rem; background: var(--bg-secondary); }
.catalog-card-progress { position: absolute; bottom: 0; left: 0; right: 0; height: 4px; background: var(--border); }
.catalog-card-progress .progress-bar { height: 100%; background: var(--accent); transition: width 0.3s; }
.catalog-card-info { padding: 0.8rem 1rem; }
.catalog-card-title { font-size: 1rem; font-weight: 600; margin-bottom: 0.3rem; }
.catalog-card-meta { display: flex; gap: 0.6rem; font-size: 0.8rem; color: var(--text-dim); flex-wrap: wrap; }
.lang-badge { background: var(--accent); color: var(--accent-contrast); padding: 0.1rem 0.5rem; border-radius: 4px; font-size: 0.75rem; font-weight: 600; }
.catalog-card-langs { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-top: 0.5rem; }
.lang-pair-btn { background: var(--bg-secondary); color: var(--text-secondary); border: 1px solid var(--border); padding: 0.25rem 0.6rem; border-radius: 4px; font-size: 0.75rem; cursor: pointer; transition: background 0.15s, border-color 0.15s; }
.lang-pair-btn:hover { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); }

.load-more { display: block; margin: 2rem auto; }

/* ── Continue Reading ───────────────────────────────────────────────── */
.continue-reading { margin-bottom: 2rem; }
.continue-reading h2 { margin-bottom: 1rem; }
.continue-reading-scroll { display: flex; gap: 1rem; overflow-x: auto; padding-bottom: 0.5rem; }
.continue-reading-scroll .catalog-card { min-width: 220px; flex-shrink: 0; }

.review-home-section {
    margin-bottom: 1.2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.9rem;
    box-shadow: var(--shadow);
}

.review-home-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.8rem;
}

.review-home-meta {
    margin-top: 0.2rem;
    color: var(--text-dim);
    font-size: 0.9rem;
}

.review-home-heatmap {
    margin-top: 0.8rem;
    display: grid;
    grid-template-columns: repeat(14, 1fr);
    gap: 0.3rem;
}

.review-home-heatmap-cell {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 3px;
    background: var(--accent);
}

/* ── Reader Page ────────────────────────────────────────────────────── */
.reader-page {
    min-height: 100vh;
    margin: 5%;
}

.reader-content { padding: 10px; }
.reader-sentences { width: 100%; }
.reader-toolbar { position: fixed; bottom: 0.6rem; left: 50%; transform: translateX(-50%); width: 80%; z-index: 60; pointer-events: none; display: flex; align-items: stretch; justify-content: center; gap: 0.5rem; }
.reader-toolbar > * { pointer-events: auto; }

.reader-toolbar.details-transparent .audio-player-container,
.reader-toolbar.details-transparent .youtube-player-wrapper,
.reader-toolbar.details-transparent .nav-menu-float,
.reader-toolbar.details-transparent .audio-progress-border {
    background: color-mix(in srgb, var(--bg) 70%, transparent);
}

.reader-toolbar.details-transparent .audio-player-container {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

@media (max-width: 768px) {
    .reader-toolbar { width: 90%; }
}

/* ── Sentence Display (Spotify-lyrics style) ────────────────────────── */
.sentence-list {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.sentence-loading {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    opacity: 0.7;
}

/* ─ Sentence row (catalog reader) ─ */
.sentence-row {
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    cursor: pointer;
    transition: opacity 0.3s ease;
    position: relative;
}
.sentence-row:not(.active) { opacity: 1; }
.sentence-row:not(.active):hover { opacity: 0.3; }
.sentence-row.active { opacity: 1; }

/* ─ Sentence text (shared) ─ */
.sentence-text {
    font-family: var(--font-primary);
    font-size: calc(1.15rem * var(--font-scale, 1));
    line-height: 2;
    color: var(--text-primary);
}
.sentence-text ruby {
    position: relative;
}
.sentence-text ruby rt {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 100%;
    white-space: nowrap;
    font-size: 0.5em;
    color: var(--color-reading);
    font-weight: 600;
    line-height: 1;
    text-align: center;
    pointer-events: none;
}

/* ─ Token spans (inline within active sentence text) ─ */
.token-span {
    cursor: pointer;
    position: relative;
    padding: 0;
    line-height: inherit;
    vertical-align: baseline;
    transition: background-color 0.15s ease, color 0.15s ease;
}
.token-highlight-enabled .token-span:hover,
.token-highlight-enabled .token-span.active {
    background-color: color-mix(in srgb, var(--pos-other) 18%, transparent);
    border-radius: 2px;
}
.token-highlight-enabled .token-span[data-pos="noun"]:hover,
.token-highlight-enabled .token-span[data-pos="noun"].active { background-color: color-mix(in srgb, var(--pos-noun) 18%, transparent); }
.token-highlight-enabled .token-span[data-pos="verb"]:hover,
.token-highlight-enabled .token-span[data-pos="verb"].active { background-color: color-mix(in srgb, var(--pos-verb) 18%, transparent); }
.token-highlight-enabled .token-span[data-pos="adj"]:hover,
.token-highlight-enabled .token-span[data-pos="adj"].active { background-color: color-mix(in srgb, var(--pos-adj) 18%, transparent); }
.token-highlight-enabled .token-span[data-pos="adv"]:hover,
.token-highlight-enabled .token-span[data-pos="adv"].active { background-color: color-mix(in srgb, var(--pos-adv) 18%, transparent); }
.token-highlight-enabled .token-span[data-pos="func"]:hover,
.token-highlight-enabled .token-span[data-pos="func"].active { background-color: color-mix(in srgb, var(--pos-func) 18%, transparent); }

/* ─ Token highlight mode: underline (POS-colored, faded edges via background-image) ─ */
.token-highlight-underline .token-span {
    background-image: linear-gradient(to right, transparent, var(--pos-other) 18%, var(--pos-other) 82%, transparent);
    background-size: 100% 1.5px;
    background-position: bottom;
    background-repeat: no-repeat;
}
.token-highlight-underline .token-span[data-pos="noun"] {
    background-image: linear-gradient(to right, transparent, var(--pos-noun) 18%, var(--pos-noun) 82%, transparent);
}
.token-highlight-underline .token-span[data-pos="verb"] {
    background-image: linear-gradient(to right, transparent, var(--pos-verb) 18%, var(--pos-verb) 82%, transparent);
}
.token-highlight-underline .token-span[data-pos="adj"] {
    background-image: linear-gradient(to right, transparent, var(--pos-adj) 18%, var(--pos-adj) 82%, transparent);
}
.token-highlight-underline .token-span[data-pos="adv"] {
    background-image: linear-gradient(to right, transparent, var(--pos-adv) 18%, var(--pos-adv) 82%, transparent);
}
.token-highlight-underline .token-span[data-pos="func"] {
    background-image: linear-gradient(to right, transparent, var(--pos-func) 18%, var(--pos-func) 82%, transparent);
}

/* ─ Token highlight mode: text color (POS-colored text) ─ */
.token-highlight-text .token-span { color: var(--pos-other); }
.token-highlight-text .token-span[data-pos="noun"] { color: var(--pos-noun); }
.token-highlight-text .token-span[data-pos="verb"] { color: var(--pos-verb); }
.token-highlight-text .token-span[data-pos="adj"]  { color: var(--pos-adj); }
.token-highlight-text .token-span[data-pos="adv"]  { color: var(--pos-adv); }
.token-highlight-text .token-span[data-pos="func"] { color: var(--pos-func); }
.token-highlight-text .token-span rt { color: var(--text-primary); }

/* ─ Translation (active only) ─ */
.sentence-translation {
    font-family: var(--font-secondary);
    font-size: calc(0.9rem * var(--font-scale, 1));
    color: var(--color-translation);
    /* margin-top: 0.2rem; */
    animation: slideDown 0.35s ease-out;
}

/* ─ Inline Grammar Points (active only) ─ */
.sentence-grammar {
    font-family: var(--font-secondary);
    margin-top: 0.5rem;
    animation: slideDown 0.4s ease-out;
}
.sentence-grammar-item {
    font-size: calc(0.85rem * var(--font-scale, 1));
    color: var(--color-grammar);
    margin-bottom: 0.3rem;
}
.sentence-grammar-item span {
    color: var(--color-grammar);
}
.sentence-grammar-example {
    display: block;
    margin-left: 0.5rem;
    margin-top: 0.2rem;
    color: var(--text-dim);
    font-style: italic;
}

/* ─ Inline Grammar Highlights (on token spans) ─ */
.grammar-highlight {
    cursor: pointer;
    position: relative;   /* anchor for absolute pseudo-elements */
    --grammar-point-ratio: var(--grammar-level-ratio, var(--grammar-level-ratio-active, 0.5));
    --grammar-point-color: hsl(calc((1 - var(--grammar-point-ratio)) * 120) 78% var(--grammar-level-lightness, 46%));
    --grammar-point-active-color: color-mix(in srgb, var(--grammar-point-color) 65%, var(--text-primary) 35%);
}
/* ◣ absolute triangle at bottom-left of first token — takes up zero space */
.grammar-highlight.grammar-start::before {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 0;
    border-bottom: 5px solid var(--grammar-point-color, var(--color-grammar));
    border-right: 5px solid transparent;
    pointer-events: none;
    opacity: 0.3;
}
/* ◢ absolute triangle at bottom-right of last token — takes up zero space */
.grammar-highlight.grammar-end::after {
    content: '';
    position: absolute;
    right: 0;
    bottom: 0;
    width: 0;
    height: 0;
    border-bottom: 5px solid var(--grammar-point-color, var(--color-grammar));
    border-left: 5px solid transparent;
    pointer-events: none;
    opacity: 0.3;
}

.grammar-highlight.grammar-active.grammar-start::before,
.grammar-highlight.grammar-active.grammar-end::after {
    opacity: 1;
    border-bottom-width: 5px;
    border-bottom-color: var(--grammar-point-active-color, var(--color-grammar));
}
.grammar-highlight.grammar-active.grammar-start::before {
    border-right-width: 5px;
}
.grammar-highlight.grammar-active.grammar-end::after {
    border-left-width: 5px;
}

/* ─ Grammar Info Panel (inside sentence-details) ─ */
.grammar-info-panel {
    position: relative;
    animation: slideDown 0.3s ease-out;
}

.grammar-info-panel .panel-label-row {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.grammar-info-panel .panel-label-row .grammar-info-pattern {
    font-size: 1.1rem;
    font-family: var(--font-primary);
    font-weight: 600;
    color: var(--text-primary);
}
.grammar-info-panel .panel-label-row .grammar-info-meta {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    flex: 1;
}

.grammar-meta-badge {
    font-size: 0.7rem;
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--color-grammar-level, var(--color-grammar));
    white-space: nowrap;
    font-weight: 600;
}

.grammar-meta-title {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-style: italic;
}

.grammar-info-meta {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    flex: 1;
}

.grammar-info-body {
    margin-top: 0.4rem;
}

.grammar-info-explanation {
    font-size: calc(0.85rem * var(--font-scale, 1));
    color: var(--text-primary);
    line-height: 1.5;
}

.grammar-info-example {
    display: block;
    margin-top: 0.3rem;
    color: var(--text-dim);
    font-style: italic;
    font-size: calc(0.8rem * var(--font-scale, 1));
}

/* ─ Token Hover Tooltip (floating, above token) ─ */
.token-hover-tooltip {
    position: fixed;
    z-index: 9999;
    transform: translateY(calc(-100% - 10px));
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    /* border: 1px solid var(--glass-border); */
    /* border: none; */
    border-radius: 8px;
    padding: 0.3rem;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    pointer-events: none;
    box-shadow: var(--shadow-elevated);
    max-width: 280px;
    font-family: var(--font-secondary);
    font-size: calc(0.7rem* var(--font-scale, 1));
    animation: fadeUpIn 0.1s ease-out;
}

.token-hover-tooltip.details-transparent {
    background: color-mix(in srgb, var(--bg) 70%, transparent);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    /* border-color: transparent; */
    box-shadow: none;
    box-shadow: var(--shadow-elevated);
}

.token-hover-tooltip-header {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.4rem;
}
.token-hover-tooltip .token-info-surface ruby {
    ruby-align: center;
}
.token-hover-tooltip .token-info-surface rt {
    font-size: 0.5em;
    color: var(--color-reading);
}
@keyframes fadeUpIn {
    from { opacity: 0; transform: translateY(calc(-100% - 4px)); }
    to   { opacity: 1; transform: translateY(calc(-100% - 10px)); }
}
.token-hover-tooltip-below {
    transform: translateY(10px);
    animation: fadeDownIn 0.1s ease-out;
}
@keyframes fadeDownIn {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(10px); }
}

/* ─ Token Info Panel (inside sentence-details) ─ */
.token-info-panel {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    position: relative;
    font-size: calc(0.85rem * var(--font-scale, 1));
    animation: slideDown 0.15s ease-out;
}
.token-info-panel .panel-label-row {
    align-items: baseline;
    gap: 0.5rem;
}

.token-info-surface {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: var(--font-primary);
}

.token-info-reading {
    color: var(--color-reading);
    font-size: calc(0.85rem * var(--font-scale, 1));
}

.token-info-lemma {
    color: var(--text-secondary);
    font-size: calc(0.8rem * var(--font-scale, 1));
}
.token-info-lemma::before {
    content: '→ ';
    color: var(--text-dim);
}

.token-hover-tooltip-meta {
    display: flow;
    align-items: baseline;
    gap: 0.4rem;
    flex-wrap: wrap;
}
.token-hover-tooltip-meta .token-info-meaning {
    flex-basis: auto;
}
.token-info-pos {
    font-size: 0.7rem;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    background: var(--bg-secondary);
    margin-right: 0.2rem;
    border: 1px solid var(--border);
    color: var(--text-dim);
    white-space: nowrap;
    width: fit-content;
    flex-shrink: 0;
}

/* ─ Panel section labels ─ */
.panel-label {
    display: none !important;
    font-size: 0.55rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
    font-family: var(--font-secondary);
    opacity: 0.55;
    margin-bottom: 0.1rem;
    flex-basis: 100%;
}
.panel-label-row {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.panel-label-row .panel-label {
    display: inline;
    flex-basis: auto;
    margin-bottom: 0;
}
.panel-label-token { color: var(--text-dim); }
.panel-label-grammar { color: var(--color-grammar); }
.panel-label-kanji { color: var(--color-translation); }
.panel-label-translation { color: var(--color-translation); }

/* ─ Panel icon indicators (absolutely positioned top-left of each panel) ─ */
.token-info-panel .panel-label,
.grammar-info-panel .panel-label,
.kanji-info-panel .panel-label,
.sentence-translation .panel-label {
    display: inline-flex;
    align-items: center;
    flex-basis: auto;
    margin: 0;
    font-size: 0;
    letter-spacing: 0;
    opacity: 1;
}
.sentence-translation .panel-label {
    margin-right: 0.5rem;
}
.sentence-translation {
    position: relative;
}

.panel-label-icon {
    width: calc(20px * var(--font-scale, 1));
    vertical-align: middle;
}

/* ─ Translation separator when panels above ─ */
.sentence-translation {
    position: relative;
}

.token-info-meaning {
    color: var(--color-translation);
    flex-basis: 100%;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Token Tooltip ──────────────────────────────────────────────────── */
.token-tooltip {
    position: fixed;
    display: none;
    background-color: var(--tooltip-bg);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 14px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    z-index: 10000;
    pointer-events: none;
    max-width: 200px;
    word-wrap: break-word;
}
.token-tooltip.visible {
    display: block;
}

/* ── Audio Player ───────────────────────────────────────────────────── */
.audio-player-container {
    width: fit-content;
    position: relative;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    display: flex;
    flex-direction: column;
    cursor: pointer;
    overflow: hidden;
    box-shadow: var(--shadow-elevated);
}
.audio-controls { display: flex; align-items: center; gap: 0.4rem; padding: 0.15rem 0.5rem 0rem 0.3rem; }
.btn-play { background: transparent; color: var(--text-primary); border: none; width: 28px; height: 28px; border-radius: 0; cursor: pointer; display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: opacity 0.3s, transform 0.2s; padding: 0; }
.btn-play svg { width: 22px; height: 22px; flex-shrink: 0; }
.btn-play:hover { opacity: 0.7; transform: scale(1.1); }
.btn-seek { background: transparent; color: var(--text-primary); border: none; width: 24px; height: 24px; cursor: pointer; display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: opacity 0.3s, transform 0.2s; padding: 0; }
.btn-seek svg { width: 16px; height: 16px; flex-shrink: 0; }
.btn-seek:hover:not(:disabled) { opacity: 0.7; transform: scale(1.1); }
.btn-seek:disabled { opacity: 0.25; cursor: default; }
.audio-info { display: flex; align-items: center; gap: 0.5rem; flex: 1; min-width: 0; margin-left:1rem;}
.audio-time { font-size: 0.75rem; color: var(--text-primary); white-space: nowrap; opacity: 0.8; }
.audio-sentence-count { font-size: 0.7rem; color: var(--text-secondary); white-space: nowrap; opacity: 0.7; }
.speed-section { border-top: 1px solid var(--border); padding-top: 0.5rem; margin-top: 0.5rem; }
.speed-section-title { font-size: 0.85rem; font-weight: 600; color: var(--text-secondary); display: block; padding: 0 0.8rem 0.4rem; }
.speed-buttons { display: flex; gap: 0.3rem; padding: 0 0.8rem; }
.btn-speed { background: none; border: 1px solid var(--border); color: var(--text-secondary); padding: 0.3rem 0.6rem; border-radius: 4px; font-size: 0.8rem; cursor: pointer; }
.btn-speed.active { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); }

/* Volume slider in nav-menu */
.nav-volume-row { display: flex; align-items: center; gap: 0.4rem; padding: 0.2rem 0.8rem 0 0; }
.nav-volume-icon { flex-shrink: 0; opacity: 0.6; }
.nav-volume-slider { flex: 1; min-width: 0; accent-color: var(--accent); cursor: pointer; height: 4px; }
.nav-volume-value { font-size: 0.75rem; color: var(--text-secondary); min-width: 2.6em; text-align: right; }

/* Progress indicator (bottom border of glass container) */
.audio-progress-border {
    height: 3px;
    position: relative;
    background: rgba(128, 128, 128, 0.1);
}
.audio-progress-border::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: var(--progress, 0%);
    background: var(--accent);
    transition: width 0.1s;
}

/* Nav menu float button — inline, right of audio pill */

/* ── YouTube Player ─────────────────────────────────────────────────── */
.youtube-player-wrapper {
    display: flex;
    flex-direction: column;
    border-radius: 14px;
    overflow: hidden;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
}
.youtube-player-video { position: relative; width: 100%; background: #000; }
.youtube-player-video iframe { display: block; width: 100%; height: 100%; border: none; }
.youtube-player-standard .youtube-player-video { aspect-ratio: 16/9; max-height: 50vh; }
.youtube-player-mini .youtube-player-video { aspect-ratio: 16/9; max-height: 180px; max-width: 320px; }
.youtube-player-controls {
    position: relative;
    cursor: pointer;
}

/* ── Reader Layouts (content_type) ──────────────────────────────────── */
.reader-layout-video { display: flex; flex-direction: column; height: 100%; }
.reader-layout-video .youtube-player-wrapper { flex-shrink: 0; margin-bottom: 0.5rem; }
.reader-layout-video .reader-sentences-area { flex: 1; overflow-y: auto; }

.reader-layout-music { display: flex; gap: 1rem; height: 100%; }
.reader-layout-music .youtube-player-wrapper { flex-shrink: 0; align-self: flex-start; position: sticky; top: 0; }
.reader-layout-music .reader-sentences-area { flex: 1; overflow-y: auto; }

@media (max-width: 768px) {
    .reader-layout-music { flex-direction: column; }
    .reader-layout-music .youtube-player-wrapper { position: static; max-width: 100%; }
    .youtube-player-mini .youtube-player-video { max-width: 100%; max-height: 160px; }
}

/* ── Catalog Category Tabs ──────────────────────────────────────────── */
.catalog-tabs { display: flex; gap: 0.5rem; margin-bottom: 1.25rem; flex-wrap: wrap; }
.catalog-tab {
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.4rem 1rem;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
}
.catalog-tab:hover { border-color: var(--accent); color: var(--text-primary); }
.catalog-tab.active {
    background: var(--accent);
    color: var(--accent-contrast);
    border-color: var(--accent);
}

/* ── CatalogCard content-type variants ──────────────────────────────── */
.catalog-card-image.aspect-16-9 { aspect-ratio: 16/9; }
.catalog-card-placeholder.aspect-16-9 { aspect-ratio: 16/9; }
.content-type-badge {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: rgba(0, 0, 0, 0.6);
    color: #fff;
    font-size: 0.7rem;
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    backdrop-filter: blur(4px);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

/* Nav menu float button — inline, right of audio pill */
.nav-menu-float {
    width: 36px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.2s, background 0.2s;
    box-shadow: var(--shadow-elevated);
    opacity: 0.7;
}
.nav-menu-float:hover {
    opacity: 1;
    background: rgba(128, 128, 128, 0.25);
}

.save-sentence-float.saved {
    opacity: 1;
    color: var(--success);
    border-color: color-mix(in srgb, var(--success) 50%, var(--glass-border));
}

.review-back-float {
    color: var(--accent);
}

.save-sentence-float:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.reader-save-feedback {
    position: fixed;
    left: 50%;
    bottom: 4.2rem;
    transform: translateX(-50%);
    z-index: 65;
    background: color-mix(in srgb, var(--success) 20%, var(--bg-card));
    border: 1px solid color-mix(in srgb, var(--success) 45%, var(--border));
    border-radius: 999px;
    padding: 0.35rem 0.8rem;
}

/* Audio navigation menu — full-page overlay */
.nav-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.12);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    pointer-events: auto;
}

.nav-menu-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0;
    width: 100%;
    max-width: 640px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
}

/* Top bar with nav links */
.nav-menu-topbar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.nav-menu-close {
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0 0.3rem;
    margin-left: auto;
    line-height: 1;
}
.nav-menu-close:hover { color: var(--text-primary); }

/* Two-column grid */
.nav-menu-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.nav-menu-col {
    display: flex;
    flex-direction: column;
}

.nav-menu-col:first-child {
    border-right: 1px solid var(--border);
}

.nav-menu-section {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
}

.nav-menu-section:last-child {
    border-bottom: none;
}

.nav-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-dim);
    display: block;
    margin-bottom: 0.4rem;
}

.nav-section-collapsible {
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-radius: 4px;
    padding: 0.2rem 0;
}
.nav-section-collapsible:hover { color: var(--text-secondary); }

.nav-menu .nav-link {
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    padding: 0.3rem 0.5rem;
    border-radius: 6px;
}

.nav-menu .nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-card);
}

.nav-menu .nav-user {
    color: var(--text-dim);
    font-size: 0.8rem;
    padding: 0.3rem 0.5rem;
}

.nav-menu .nav-logout {
    color: var(--error);
}

.nav-menu .nav-register {
    background: var(--accent);
    color: var(--accent-contrast) !important;
}

.nav-menu .nav-register:hover {
    background: var(--accent-hover);
}

/* Toggle controls in audio menu */
.nav-menu .toggle-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.4rem 0;
    cursor: pointer;
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.nav-menu .toggle-label:hover {
    background: var(--bg-card);
}

.nav-menu .toggle-switch {
    width: 36px;
    height: 20px;
    background: var(--border);
    border-radius: 10px;
    position: relative;
    transition: background 0.2s;
}

.nav-menu .toggle-switch.active {
    background: var(--accent);
}

.nav-menu .toggle-switch::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background: var(--text-primary);
    border-radius: 50%;
    transition: transform 0.2s, background 0.2s;
}

.nav-menu .toggle-switch.active::after {
    transform: translateX(16px);
    background: var(--accent-contrast);
}

/* Grammar level selector in nav menu */
.grammar-level-selector {
    padding: 0.2rem 0 0.3rem;
}

.grammar-level-label {
    font-size: 0.8rem;
    color: var(--text-dim);
    display: block;
    margin-bottom: 0.3rem;
}

.grammar-level-buttons {
    display: flex;
    gap: 0.3rem;
}

.btn-grammar-level {
    flex: 1;
    padding: 0.3rem 0;
    font-size: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    text-align: center;
}

.btn-grammar-level.active {
    background: var(--accent);
    color: var(--accent-contrast);
    border-color: var(--accent);
    font-weight: 600;
}

/* Setting info icon & expandable tip */
.setting-info-icon {
    width: 14px;
    height: 14px;
    vertical-align: middle;
    margin-left: 0.2rem;
    color: var(--text-dim);
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.15s;
}
.setting-info-icon:hover {
    opacity: 1;
}

.setting-info-text {
    font-size: 0.78rem;
    color: var(--text-dim);
    line-height: 1.4;
    padding: 0.25rem 0 0.4rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 0.2rem;
}

/* POS color legend */
.pos-legend {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 0.25rem 0.6rem;
    margin-top: 0.35rem;
    padding-top: 0.3rem;
    border-top: 1px solid var(--border);
}

.pos-legend-item {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.pos-legend-swatch {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* ── Sentence Details reorder list ──────────────────────────────────── */
.details-order-list {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    margin-top: 0.3rem;
}

.details-order-item {
    display: flex;
    flex-direction: column;
    border: 1px solid transparent;
    border-radius: 6px;
    padding: 0.1rem 0;
    transition: border-color 0.15s, background 0.15s;
    cursor: grab;
}
.details-order-item:active { cursor: grabbing; }
.details-order-item.drag-over {
    border-color: var(--accent);
    background: var(--highlight-hover);
}

.order-drag-handle {
    font-size: 0.7rem;
    color: var(--text-dim);
    opacity: 0.4;
    user-select: none;
    letter-spacing: 1px;
    line-height: 1;
    text-align: center;
    cursor: grab;
    padding: 0.05rem 0;
}
.details-order-item:hover .order-drag-handle { opacity: 0.8; }

.order-toggle {
    flex: 1;
    min-width: 0;
}

.order-toggle-with-chevron {
    display: flex;
    align-items: center;
    gap: 0.1rem;
    width: 100%;
}
.order-toggle-with-chevron .order-toggle { flex: 1; }

.order-panel-detach-btn {
    background: none;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: color 0.15s ease, background 0.15s ease;
}
.order-panel-detach-btn:hover {
    color: var(--accent);
    background: var(--bg-card);
}
.order-panel-detach-btn.active {
    color: var(--accent);
}
.order-panel-detach-btn .detach-icon-flipped {
    transform: rotate(180deg);
}

.order-chevron {
    font-size: 0.65rem;
    color: var(--text-dim);
    cursor: pointer;
    padding: 0.3rem 0.4rem;
    border-radius: 4px;
    transition: background 0.15s, color 0.15s;
    flex-shrink: 0;
    user-select: none;
}
.order-chevron:hover {
    background: var(--bg-card);
    color: var(--text-secondary);
}

.order-sub-settings {
    padding: 0.2rem 0 0.2rem 0.5rem;
    border-left: 2px solid var(--border);
    margin-left: 0.6rem;
    margin-top: 0.1rem;
}

/* ── Grammar level popup ────────────────────────────────────────────── */
.grammar-level-popup-wrap {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    position: relative;
}

.grammar-level-popup-trigger {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg-card);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.8rem;
    transition: border-color 0.15s;
}
.grammar-level-popup-trigger:hover {
    border-color: var(--accent);
}

.grammar-level-colorized {
    color: var(--color-grammar-level, var(--color-grammar));
}

.grammar-level-popup-trigger.grammar-level-colorized {
    color: var(--color-grammar-level, var(--color-grammar));
    border-color: color-mix(in srgb, var(--color-grammar-level, var(--color-grammar)) 35%, var(--border));
}

.grammar-level-popup-trigger.grammar-level-colorized:hover {
    border-color: var(--color-grammar-level, var(--color-grammar));
}

.grammar-level-trigger-scale {
    display: inline-flex;
    align-items: center;
    gap: 0.16rem;
    margin-left: 0.15rem;
}

.grammar-level-trigger-dot {
    width: 0.35rem;
    height: 0.35rem;
    border-radius: 999px;
    background: var(--color-grammar-level, var(--color-grammar));
    opacity: 0.65;
}

.grammar-level-current {
    font-weight: 600;
    font-size: 0.8rem;
}

.grammar-level-arrow {
    font-size: 0.55rem;
    color: var(--text-dim);
}

.grammar-level-popup {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 0.25rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    box-shadow: var(--shadow);
    z-index: 110;
    min-width: 60px;
    overflow: hidden;
}

.grammar-level-popup-item {
    padding: 0.4rem 0.7rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    text-align: center;
}
.grammar-level-popup-item.grammar-level-colorized {
    color: var(--color-grammar-level, var(--color-grammar));
}
.grammar-level-popup-item:hover {
    background: color-mix(in srgb, var(--color-grammar-level, var(--color-grammar)) 12%, transparent);
    color: var(--color-grammar-level, var(--color-grammar));
}
.grammar-level-popup-item.active {
    background: color-mix(in srgb, var(--color-grammar-level, var(--color-grammar)) 25%, transparent);
    color: var(--color-grammar-level, var(--color-grammar));
    border-left: 2px solid var(--color-grammar-level, var(--color-grammar));
    font-weight: 600;
}

/* Theme selector in nav menu */
.nav-menu .theme-section,
.theme-section {
    padding: 0;
}

.theme-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-dim);
    display: block;
    margin-bottom: 0.4rem;
}

.theme-list {
    display: flex;
    flex-direction: column;
    max-height: 360px;
    overflow-y: auto;
    gap: 0.3rem;
    border-radius: 6px;
    overflow-x: hidden;
}

.theme-list-item {
    position: relative;
    width: 100%;
    min-height: 84px;
    border: none;
    border-left: 3px solid transparent;
    cursor: pointer;
    padding: 0.45rem 0.55rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: filter 0.12s;
    outline: none;
    flex-shrink: 0;
    gap: 0.5rem;
    border-radius: 6px;
}

.theme-list-item:hover {
    filter: brightness(1.1);
}

.theme-list-item.active {
    filter: brightness(1.05);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, currentColor 18%, transparent);
}

.theme-list-copy {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    min-width: 0;
    flex: 1;
    gap: 0.18rem;
}

.theme-preview-line {
    display: block;
    width: 100%;
    min-width: 0;
    pointer-events: none;
    color: var(--theme-preview-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.theme-preview-source {
    font-size: 0.9rem;
    line-height: 1.25;
}

.theme-preview-source rt,
.theme-preview-target rt {
    font-size: 0.5em;
    color: var(--theme-preview-reading);
}

.theme-preview-target {
    font-size: 0.72rem;
    line-height: 1.2;
    color: var(--theme-preview-translation);
}

.theme-preview-pos {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 0.45rem;
    font-size: 0.64rem;
    line-height: 1.15;
    white-space: normal;
}

.theme-preview-pos-token {
    font-weight: 600;
}

.theme-preview-pos-noun { color: var(--theme-preview-pos-noun); }
.theme-preview-pos-verb { color: var(--theme-preview-pos-verb); }
.theme-preview-pos-adj { color: var(--theme-preview-pos-adj); }
.theme-preview-pos-adv { color: var(--theme-preview-pos-adv); }
.theme-preview-pos-func { color: var(--theme-preview-pos-func); }
.theme-preview-pos-other { color: var(--theme-preview-pos-other); }

.theme-list-item.active .theme-preview-line {
    opacity: 1;
}

/* Font selector in nav menu */
.nav-menu .font-section,
.font-section {
    padding: 0;
}

.font-select-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.3rem 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.font-select {
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
    max-width: 160px;
}
.font-select:hover { border-color: var(--accent); }

/* Guide section in audio menu */
.nav-menu .guide-section {
    padding: 0;
}

.nav-menu .guide-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 0.3rem 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-radius: 6px;
}

.nav-menu .guide-title:hover {
    background: var(--bg-card);
}

.nav-menu .guide-arrow {
    font-size: 0.75rem;
    color: var(--text-dim);
}

/* ── Library Paragraph Layout ───────────────────────────────────────── */
.paragraph-block {
    display: block;
    position: relative;
}
.paragraph-block.meta-block { text-align: left; margin-bottom: 0.8rem; }
.paragraph-block.meta-block .sentence-inline { display: block; }
.paragraph-block.meta-block .sentence-inline:first-child .sentence-text {
    font-size: calc(1.8rem * var(--font-scale, 1));
    font-weight: 700;
}
.paragraph-block.meta-block .sentence-inline:nth-child(n+2) .sentence-text {
    font-size: calc(1.5rem * var(--font-scale, 1));
    font-weight: 500;
}
.paragraph-block:not(.meta-block) { text-indent: 1em; }
.paragraph-block.non-cjk .sentence-inline { margin-right: 0.25em; }
.paragraph-block.meta-block .sentence-inline { margin-right: 0; }

.sentence-inline {
    display: inline;
    cursor: pointer;
    transition: opacity 0.3s ease;
}
.sentence-inline:not(.active) { opacity: 0.9; }
.sentence-inline.active { opacity: 1; }

/* ─ Sentence replay button (auto-pause) ─ */
.sentence-replay {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--accent);
    padding: 0.3rem;
    border-radius: 50%;
    transition: color 0.2s, background 0.2s;
    vertical-align: middle;
    margin-right: 2px;
}
.sentence-replay:hover { color: var(--accent-hover); background: rgba(128, 128, 128, 0.3); }
.sentence-replay svg {
    width: calc(18px * var(--font-scale, 1));
    height: calc(18px * var(--font-scale, 1));
}

/* ─ Toggle details button (next to replay) ─ */
.sentence-toggle-details {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background: var(--bg);
    /* backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px); */
    border: 0;
    color: var(--accent);
    padding: 0.3rem;
    margin-right: 0.4rem;
    border-radius: 50%;
    transition: color 0.2s, background 0.2s;
    vertical-align: middle;
}
.sentence-toggle-details:hover { color: var(--accent-hover); background: rgba(128, 128, 128, 0.3); }
.sentence-toggle-details svg {
    width: calc(18px * var(--font-scale, 1));
    height: calc(18px * var(--font-scale, 1));
    transition: opacity 0.2s ease;
}
.sentence-toggle-details.collapsed svg {
    opacity: 0.5;
}

/* ─ Sentence details floating panel ─ */
.sentence-details {
    display: block;
    max-width: 100%;
    margin: 0;
    background: transparent;
    border: none;
    border-radius: 6px;
    font-family: var(--font-secondary);
    animation: slideDown 0.35s ease-out;
    text-indent: 0;
    /* box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3); */
}

/* ─ Shared sub-panel base (token, grammar, kanji, translation) ─ */
.details-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    /* border: 1px solid var(--glass-border); */
    box-shadow: var(--shadow-elevated);
    border-radius: 6px;
    padding: 0.5rem;
    width: fit-content;
    flex-shrink: 0;
}

/* ─ Docked / detached panel wrappers ─ */
.detached-panel-wrap {
    position: fixed;
    z-index: 61;
    display: flex;
    flex-direction: column;
    /* width: min(420px, calc(100vw - 1rem)); */
    max-height: calc(100vh - 1rem);
    overflow: hidden;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    /* border: 1px solid var(--glass-border); */
    border-radius: 6px;
    box-shadow: var(--shadow-elevated);
    animation: slideDown 0.2s ease-out;
    cursor: grab;
}
.detached-panel-wrap .details-panel {
    border: none;
    border-radius: 0;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}
.detached-panel-wrap.details-dragging {
    user-select: none;
    cursor: grabbing;
    transition: none;
}

/* Transparent mode: translucent background on sub-panels */
.details-transparent .details-panel {
    background: color-mix(in srgb, var(--bg) 70%, transparent) !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    border-color: transparent !important;
    /* box-shadow: none !important; */
    /* box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3); */
}

/* ── Transparent mode: contrasting font colors + text-shadow ── */

/* Primary text — contrasting color with shadow */
.details-transparent .token-info-surface,
.details-transparent .grammar-info-explanation,
.details-transparent .kanji-compound-word {
    color: var(--text-primary);
    text-shadow:
        0 0 6px var(--ts-primary),
        0 0 14px var(--ts-primary),
        0 0 28px var(--ts-primary),
        0 0 48px var(--ts-primary);
}

/* Translation-colored text — contrasting color with shadow */
.details-transparent .token-info-meaning,
.details-transparent .kanji-info-meanings,
.details-transparent .sentence-translation,
.details-transparent .kanji-breadcrumb-item {
    color: var(--color-translation);
    text-shadow:
        0 0 6px var(--ts-translation),
        0 0 14px var(--ts-translation),
        0 0 28px var(--ts-translation),
        0 0 48px var(--ts-translation);
}

/* Reading-colored text — contrasting color with shadow */
.details-transparent .token-info-reading,
.details-transparent .kanji-reading-label,
.details-transparent .kanji-compound-reading,
.details-transparent .kanji-section-label {
    color: var(--color-reading);
    text-shadow:
        0 0 6px var(--ts-reading),
        0 0 14px var(--ts-reading),
        0 0 28px var(--ts-reading),
        0 0 48px var(--ts-reading);
}

/* Grammar-colored text — contrasting color with shadow */
.details-transparent .grammar-info-pattern {
    color: var(--color-grammar);
    text-shadow:
        0 0 6px var(--ts-grammar),
        0 0 14px var(--ts-grammar),
        0 0 28px var(--ts-grammar),
        0 0 48px var(--ts-grammar);
}

/* Secondary text — contrasting color with shadow */
.details-transparent .token-info-lemma,
.details-transparent .grammar-meta-title,
.details-transparent .grammar-info-example,
.details-transparent .kanji-info-reading,
.details-transparent .kanji-reading-romanized {
    color: var(--text-secondary);
    text-shadow:
        0 0 6px var(--ts-secondary),
        0 0 14px var(--ts-secondary),
        0 0 28px var(--ts-secondary),
        0 0 48px var(--ts-secondary);
}

/* Dim text — contrasting color with shadow */
.details-transparent .kanji-compound-meaning,
.details-transparent .kanji-meta-badge,
.details-transparent .kanji-info-loading {
    color: var(--text-dim);
    text-shadow:
        0 0 6px var(--ts-dim),
        0 0 14px var(--ts-dim),
        0 0 28px var(--ts-dim),
        0 0 48px var(--ts-dim);
}

/* ── Previously missing elements — now with shadow + color ── */

/* Breadcrumb separator */
.details-transparent .kanji-breadcrumb-sep {
    color: var(--text-dim);
    text-shadow:
        0 0 6px var(--ts-dim),
        0 0 14px var(--ts-dim),
        0 0 28px var(--ts-dim);
}

/* Frequency icon in meta badge */
.details-transparent .kanji-meta-badge .freq-icon {
    filter: drop-shadow(0 0 4px var(--ts-dim)) drop-shadow(0 0 10px var(--ts-dim)) drop-shadow(0 0 20px var(--ts-dim));
}

/* Reading expand count */
.details-transparent .kanji-reading-expand-count {
    color: var(--text-dim);
    text-shadow:
        0 0 6px var(--ts-dim),
        0 0 14px var(--ts-dim),
        0 0 28px var(--ts-dim);
}

/* Clickable kanji in compounds */
.details-transparent .kanji-compound-char {
    text-shadow:
        0 0 6px var(--ts-primary),
        0 0 14px var(--ts-primary),
        0 0 28px var(--ts-primary);
}

/* Icon labels (SVG/img) — drop-shadow using matching category */
.details-transparent .panel-label-icon {
    filter: drop-shadow(0 0 4px var(--ts-primary)) drop-shadow(0 0 10px var(--ts-primary)) drop-shadow(0 0 20px var(--ts-primary));
}
.details-transparent .kanji-section-label-icon svg {
    filter: drop-shadow(0 0 4px var(--ts-reading)) drop-shadow(0 0 10px var(--ts-reading)) drop-shadow(0 0 20px var(--ts-reading));
}
.details-transparent .kanji-reading-expand svg {
    filter: drop-shadow(0 0 4px var(--ts-dim)) drop-shadow(0 0 10px var(--ts-dim)) drop-shadow(0 0 20px var(--ts-dim));
}

/* Elements with their own background — keep background, subtle outline */
.details-transparent .kanji-char-link,
.details-transparent .kanji-stroke-svg,
.details-transparent .kanji-breadcrumb-item.active {
    box-shadow: var(--shadow);
}

/* Compound list border — make more visible */
.details-transparent .kanji-compound-item {
    border-bottom-color: color-mix(in srgb, var(--text) 25%, transparent);
}

/* Translation separator */
.details-transparent .sentence-translation:not(:first-child) {
    border-top-color: color-mix(in srgb, var(--text) 25%, transparent);
}

.details-panel-content {
    /* overflow-y: auto; */
    flex: 1;
    min-height: 0;
    max-height: calc(100vh - 3rem);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    /* box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3); */
}

/* Pinned-top / pinned-bottom: fit content, align with reader-toolbar */
.details-pinned-top,
.details-pinned-bottom {
    position: fixed !important;
    /* left: 2.8rem !important; */
    width: auto !important;
    max-width: 80% !important;
    height: auto !important;
    max-height: 50vh;
    transform: none !important;
    /* margin: 0; */
}
@media (max-width: 768px) {
    .details-pinned-top,
    .details-pinned-bottom {
        left: 5% !important;
        max-width: 90% !important;
    }
}
.details-pinned-top {
    top: 1rem !important;
    bottom: auto !important;
    transform-origin: bottom left;
}
.details-pinned-bottom {
    top: auto !important;
    bottom: 56px !important;
    transform-origin: top right;
}
.details-pinned-top .details-panel-content,
.details-pinned-bottom .details-panel-content {
    max-height: 45vh;
}

.sentence-grammar {
    max-height: 150px;
    overflow-y: auto;
}

/* ── Kanji Character Click Target ───────────────────────────────────── */
.kanji-char {
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
    border-radius: 2px;
}
.kanji-char:hover {
    background: color-mix(in srgb, var(--accent) 18%, transparent);
    text-shadow: 0 0 0.01px currentColor;
}
.kanji-char.kanji-active {
    background: color-mix(in srgb, var(--accent) 24%, transparent);
    text-shadow: 0 0 0.01px currentColor;
}

/* ── Kanji Info Panel (inside sentence-details) ─────────────────────── */
.kanji-info-loading {
    font-size: 0.85rem;
    color: var(--text-dim);
    padding: 0.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    flex-shrink: 0;
}

.kanji-info-panel {
    position: relative;
    animation: slideDown 0.3s ease-out;
    overflow-y: auto;
    min-height: 0;
    max-height: 50vh;
}

.kanji-info-header {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}



.kanji-info-meta {
    display: flex;
    gap: 0.3rem;
    flex-wrap: wrap;
    margin-left: auto;
}

.kanji-meta-badge {
    font-size: 0.6rem;
    padding: 0.1rem 0.3rem;
    border-radius: 3px;
    background: none;
    border: none;
    color: var(--text-dim);
    white-space: nowrap;
    opacity: 0.7;
    display: inline-flex;
    align-items: center;
    gap: 0.15rem;
}
.kanji-meta-badge .freq-icon {
    width: 14px;
    height: 14px;
    vertical-align: middle;
}

.kanji-info-body {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
    align-items: flex-start;
}

.kanji-stroke-player {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.kanji-stroke-svg {
    width: 100px;
    height: 100px;
    background: var(--bg-secondary);
    border-radius: 6px;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
    cursor: pointer;
}
.kanji-stroke-svg > div {
    display: flex;
    align-items: center;
    justify-content: center;
}
.kanji-stroke-svg > div svg {
    width: 90px;
    height: 90px;
}
.stroke-play-overlay {
    position: absolute;
    bottom: 3px;
    right: 3px;
    width: 14px;
    height: 14px;
    color: var(--text-dim);
    opacity: 0.4;
    pointer-events: none;
    transition: opacity 0.15s;
}
.kanji-stroke-svg:hover .stroke-play-overlay {
    opacity: 0.8;
}
.stroke-playing {
    border-color: var(--accent);
}

/* SVG stroke/fill overrides for theme compatibility */
.kanji-stroke-svg > div svg path { stroke: var(--text-primary) !important; }
.kanji-stroke-svg > div svg text { fill: var(--text-dim) !important; }

.kanji-info-details {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.kanji-info-meanings {
    font-size: 0.95rem;
    color: var(--color-translation);
    font-weight: 500;
}

.kanji-info-reading {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.kanji-reading-expand {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    margin-left: auto;
    background: none;
    border: 1px solid var(--border);
    border-radius: 3px;
    color: var(--text-dim);
    cursor: pointer;
    padding: 0.1rem 0.3rem;
    font-size: 0.65rem;
    transition: color 0.15s, border-color 0.15s;
    flex-shrink: 0;
}
.kanji-reading-expand:hover {
    color: var(--text-secondary);
    border-color: var(--text-dim);
}
.kanji-reading-expand-count {
    font-size: 0.6rem;
    color: var(--text-dim);
}

.kanji-reading-label {
    display: inline-block;
    min-width: 1.6em;
    font-weight: 600;
    color: var(--color-reading);
    font-size: 0.8rem;
}

.kanji-reading-romanized {
    color: var(--text-dim);
    font-size: 0.8rem;
}

.kanji-info-parts {
    font-size: 0.8rem;
    color: var(--text-dim);
}

/* ── Kanji Parts & Similar Sections ─────────────────────────────────── */
.kanji-info-section {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.4rem;
    font-size: 0.85rem;
}
.kanji-section-label {
    font-weight: 600;
    color: var(--color-reading);
    font-size: 0.75rem;
    min-width: 3.5em;
}
.kanji-section-label-icon {
    min-width: unset;
    display: inline-flex;
    align-items: center;
    font-size: 1.1rem;
}
.kanji-section-label-icon svg {
    width: 18px;
    height: 18px;
}
.kanji-char-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
}

/* ── Tategaki (Vertical Reading) Mode ───────────────────────────────── */
.tategaki .reader-content {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    overflow-x: auto;
    overflow-y: hidden;
    height: calc(100vh - 5.5rem);
    max-height: calc(100vh - 5.5rem);
}

.tategaki .reader-sentences {
    min-width: 100%;
    height: 100%;
}

.tategaki .sentence-list {
    height: 100%;
}

/* Let paragraphs fill the column height and flow naturally */
.tategaki .paragraph-block {
    text-indent: 0;
    display: block;
}
.tategaki .paragraph-block:not(.meta-block) {
    text-indent: 1em;
}

/* Sentence text in vertical mode */
.tategaki .sentence-text {
    line-height: 1.8;
}

/* ─ Ruby (furigana) in vertical mode ─ */
/* Keep furigana out of normal flow so it doesn't push adjacent columns */
.tategaki .sentence-text ruby {
    position: relative;
    display: inline-block;
}
.tategaki .sentence-text ruby rt {
    position: absolute;
    left: 100%;
    top: 50%;
    padding: 0;
    margin: 0;
    bottom: auto;
    transform: translate(-0.4em, -50%);
    white-space: nowrap;
    writing-mode: vertical-tb;
    font-size: 0.5em;
    color: var(--color-reading);
    font-weight: 600;
    line-height: 1;
    text-align: center;
    pointer-events: none;
}

/* Keep ruby layout space stable in tategaki to avoid text jitter on active sentence */
.tategaki.reading-scope-active .sentence-inline:not(.active) .sentence-text ruby rt,
.tategaki.reading-scope-active .sentence-row:not(.active) .sentence-text ruby rt {
    visibility: hidden;
}

/* ─ Token underline in vertical mode: top-to-bottom gradient on the right edge ─ */
.tategaki .token-highlight-underline .token-span {
    background-image: linear-gradient(to bottom, transparent, var(--pos-other) 18%, var(--pos-other) 82%, transparent);
    background-size: 1.5px 100%;
    background-position: right;
    background-repeat: no-repeat;
}
.tategaki .token-highlight-underline .token-span[data-pos="noun"] {
    background-image: linear-gradient(to bottom, transparent, var(--pos-noun) 18%, var(--pos-noun) 82%, transparent);
    background-size: 1.5px 100%;
    background-position: right;
}
.tategaki .token-highlight-underline .token-span[data-pos="verb"] {
    background-image: linear-gradient(to bottom, transparent, var(--pos-verb) 18%, var(--pos-verb) 82%, transparent);
    background-size: 1.5px 100%;
    background-position: right;
}
.tategaki .token-highlight-underline .token-span[data-pos="adj"] {
    background-image: linear-gradient(to bottom, transparent, var(--pos-adj) 18%, var(--pos-adj) 82%, transparent);
    background-size: 1.5px 100%;
    background-position: right;
}
.tategaki .token-highlight-underline .token-span[data-pos="adv"] {
    background-image: linear-gradient(to bottom, transparent, var(--pos-adv) 18%, var(--pos-adv) 82%, transparent);
    background-size: 1.5px 100%;
    background-position: right;
}
.tategaki .token-highlight-underline .token-span[data-pos="func"] {
    background-image: linear-gradient(to bottom, transparent, var(--pos-func) 18%, var(--pos-func) 82%, transparent);
    background-size: 1.5px 100%;
    background-position: right;
}

/* Keep token wrappers layout-neutral in vertical mode (no line metric changes). */
.tategaki .token-span {
    padding: 0;
    line-height: inherit;
    vertical-align: baseline;
}

/* Inactive lines keep wrappers for layout stability; disable per-token hover/click noise there. */
.tategaki .sentence-inline:not(.active) .token-span,
.tategaki .sentence-row:not(.active) .token-span {
    pointer-events: none;
}

/* ─ Grammar markers in vertical mode ─ */
/* Start marker: ◥ absolute triangle at physical top-left of first token */
.tategaki .grammar-highlight.grammar-start::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 6px;
    height: 6px;
    border: none;
    background: var(--grammar-point-color, var(--color-grammar));
    clip-path: polygon(0% 0%, 100% 0%, 0% 100%);
    opacity: 0.4;
    pointer-events: none;
    margin: 0;
}
/* End marker: ◣ absolute triangle at physical bottom-left of last token */
.tategaki .grammar-highlight.grammar-end::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: auto;
    width: 6px;
    height: 6px;
    border: none;
    background: var(--grammar-point-color, var(--color-grammar));
    clip-path: polygon(0% 0%, 0% 100%, 100% 100%);
    opacity: 0.4;
    pointer-events: none;
    margin: 0;
}

/* Active grammar markers in vertical mode */
.tategaki .grammar-highlight.grammar-active.grammar-start::before,
.tategaki .grammar-highlight.grammar-active.grammar-end::after {
    opacity: 1;
}
.tategaki .grammar-highlight.grammar-active.grammar-start::before {
    background: var(--grammar-point-active-color, var(--color-grammar));
}
.tategaki .grammar-highlight.grammar-active.grammar-end::after {
    background: var(--grammar-point-active-color, var(--color-grammar));
}

/* ─ Details panels stay horizontal in tategaki mode ─ */
.tategaki .sentence-details {
    writing-mode: horizontal-tb;
    text-orientation: initial;
}
.tategaki .detached-panel-wrap,
.tategaki .docked-panel-wrap {
    writing-mode: horizontal-tb;
    text-orientation: initial;
}

/* ─ Inline sentence controls in tategaki ─ */
.tategaki .sentence-replay,
.tategaki .sentence-toggle-details {
    writing-mode: horizontal-tb;
}

/* ─ Token tooltip stays horizontal ─ */
.tategaki .token-tooltip {
    writing-mode: horizontal-tb;
    text-orientation: initial;
}

/* ─ Toolbar stays horizontal  ─ */
.tategaki .reader-toolbar {
    writing-mode: horizontal-tb;
    text-orientation: initial;
}

/* ─ Mirror audio controls: swap seek btn positions + icons, progress from right ─ */
.tategaki .reader-toolbar .audio-controls {
    transform: scaleX(-1);
}
.tategaki .reader-toolbar .audio-info {
    transform: scaleX(-1);
}
.tategaki .reader-toolbar .audio-progress-border {
    transform: scaleX(-1);
}

/* ─ Meta blocks (title/author) in vertical mode ─ */
.tategaki .paragraph-block.meta-block .sentence-inline:first-child .sentence-text {
    font-size: calc(1.8rem * var(--font-scale, 1));
    font-weight: 700;
}

/* ─ Margin adjustments ─ */
.tategaki {
    margin: 0 5%;
    min-height: 0;
    overflow-y: hidden;        /* prevent vertical scrollbar in tategaki */
}

body:has(.tategaki) {
    overflow-y: hidden;
}

/* ─ Loading indicator stays horizontal ─ */
.tategaki .sentence-loading {
    writing-mode: horizontal-tb;
}

/* ─ Kanji tooltips stay correctly oriented ─ */
.tategaki [data-tooltip]:hover::after {
    writing-mode: horizontal-tb;
}
.kanji-char-link {
    display: inline-flex;    /* Keeps it behaving like a span/inline element */
    align-items: center;     /* Centers vertically */
    justify-content: center; /* Centers horizontally */
    line-height: 1;          /* Changed from normal to prevent extra lead space */
    padding: 0 3px 1px 3px;   
    min-width: 1.5rem;       /* Optional: ensures a square-ish look if the kanji is thin */
    aspect-ratio: 1 / 1;     /* Optional: forces a perfect square */
    border-radius: 4px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
}
.kanji-char-link:hover {
    background: var(--highlight-hover);
    color: var(--color-translation);
    border-color: var(--color-translation);
}
.kanji-char-link.kanji-char-unavailable,
.kanji-compound-char.kanji-char-unavailable {
    opacity: 0.35;
    cursor: default;
    border-style: dashed;
}
.kanji-char-link.kanji-char-unavailable:hover {
    background: var(--bg-secondary);
    color: var(--text-dim);
    border-color: var(--border);
}

/* ── Kanji tooltip (data-tooltip attribute) ─────────────────────────── */
[data-tooltip] {
    position: relative;
}
[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--tooltip-bg);
    color: var(--text-primary);
    font-size: 0.7rem;
    padding: 0.2rem 0.45rem;
    border-radius: 4px;
    white-space: nowrap;
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    pointer-events: none;
    z-index: 100;
}
[data-tooltip=""]:hover::after {
    display: none;
}



/* ── Kanji history breadcrumb ───────────────────────────────────────── */
.kanji-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.1rem;
    font-size: 0.8rem;
    color: var(--text-dim);
    flex: 1;
    min-width: 0;
}
.kanji-breadcrumb-sep {
    margin: 0 0.05rem;
    opacity: 0.4;
    font-size: 0.7rem;
}
.kanji-breadcrumb-item {
    cursor: pointer;
    padding: 0.05rem 0.2rem;
    border-radius: 3px;
    transition: background 0.15s, color 0.15s;
}
.kanji-breadcrumb-item:hover:not(.active) {
    background: var(--highlight-hover);
    color: var(--color-translation);
}
.kanji-breadcrumb-item.active {
    color: var(--text-primary);
    background-color: var(--bg-card);
    line-height: normal;
    cursor: default;
}

/* ── Current kanji (inert in parts/similar/compounds) ───────────────── */
.kanji-char-link.kanji-char-current,
.kanji-compound-char.kanji-char-current {
    opacity: 0.45;
    cursor: default;
    pointer-events: none;
}

/* ── Clickable kanji in compound words ──────────────────────────────── */
.kanji-compound-char {
    cursor: pointer;
    border-radius: 2px;
    transition: color 0.15s;
}
.kanji-compound-char:hover:not(.kanji-char-unavailable) {
    color: var(--color-translation);
    text-decoration: underline;
}

/* ── Kanji Compound list (inline under readings) ────────────────────── */
.kanji-compound-list {
    padding-left: 1.6em;
    animation: slideDown 0.25s ease-out;
}
.kanji-compound-item {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
    padding: 0.2rem 0;
    font-size: 0.8rem;
    border-bottom: 1px solid var(--glass-border);
}
.kanji-compound-item:last-child {
    border-bottom: none;
}
.kanji-compound-word {
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
}
.kanji-compound-reading {
    color: var(--color-reading);
    font-size: 0.75rem;
    white-space: nowrap;
}
.kanji-compound-meaning {
    color: var(--text-dim);
    font-size: 0.75rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

@media (max-width: 480px) {
    .kanji-info-body { flex-direction: column; }
    .kanji-stroke-svg { width: 80px; height: 80px; }
    .kanji-stroke-svg > div svg { width: 70px; height: 70px; }
}

.nav-menu .guide-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.3rem 0;
    font-size: 0.85rem;
    color: var(--text-dim);
}

.nav-menu .guide-icon {
    font-size: 1rem;
    min-width: 24px;
    text-align: center;
}

/* Speed section within nav-menu */
.nav-menu .speed-section,
.speed-section {
    padding: 0;
}

.nav-menu .speed-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-dim);
}

@media (max-width: 640px) {
    .nav-menu {
        padding: 0;
        align-items: flex-end;
    }
    .nav-menu-content {
        max-width: 100%;
        margin: 0 1rem;
        max-height: 80vh;
        border-radius: 12px 12px 0 0;
        margin-bottom: 0;
    }
    .nav-menu-grid {
        grid-template-columns: 1fr;
    }
    .nav-menu-col:first-child {
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
}

/* ── Auth Pages ─────────────────────────────────────────────────────── */
.auth-page { display: flex; justify-content: center; padding-top: 3rem; }
.auth-card { background: var(--bg-card); border-radius: 12px; padding: 2rem; width: 100%; max-width: 400px; box-shadow: var(--shadow); }
.auth-card h2 { margin-bottom: 1.5rem; }
.auth-card form { display: flex; flex-direction: column; gap: 1rem; }
.auth-card label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.9rem; color: var(--text-secondary); }
.auth-card input { background: var(--bg-secondary); color: var(--text-primary); border: 1px solid var(--border); padding: 0.6rem 0.8rem; border-radius: 6px; font-size: 1rem; }
.auth-card input:focus { outline: none; border-color: var(--accent); }
.auth-social-actions { display: flex; flex-direction: column; gap: 0.75rem; margin-top: 1rem; }
.auth-social-actions .btn { width: 100%; }
.auth-switch { margin-top: 1rem; font-size: 0.85rem; color: var(--text-dim); text-align: center; }
.oauth-callback-card p { color: var(--text-secondary); }
.error-msg { background: color-mix(in srgb, var(--error) 10%, transparent); color: var(--error); padding: 0.6rem 1rem; border-radius: 6px; margin-bottom: 1rem; font-size: 0.9rem; }
.success-msg { background: color-mix(in srgb, var(--success) 10%, transparent); color: var(--success); padding: 0.6rem 1rem; border-radius: 6px; margin-bottom: 1rem; font-size: 0.9rem; }

/* ── Settings Page ──────────────────────────────────────────────────── */
.settings-page { display: flex; justify-content: center; padding-top: 3rem; }
.settings-card { background: var(--bg-card); border-radius: 12px; padding: 2rem; width: 100%; max-width: 400px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 1rem; }
.settings-card h2 { margin-bottom: 0.5rem; }
.settings-card label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.9rem; color: var(--text-secondary); }
.settings-card select { background: var(--bg-secondary); color: var(--text-primary); border: 1px solid var(--border); padding: 0.6rem 0.8rem; border-radius: 6px; font-size: 1rem; }
.saved-msg { color: var(--success); font-size: 0.85rem; }

/* ── Review Page ───────────────────────────────────────────────────── */
.review-page {
    max-width: 960px;
    margin: 0 auto;
    padding: 1rem 1rem 5rem;
}

.review-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1rem;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.review-empty {
    align-items: center;
    text-align: center;
}

.review-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.review-meta {
    color: var(--text-dim);
    font-size: 0.9rem;
}

.review-sentence-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.9rem;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.review-book-title {
    color: var(--text-secondary);
    font-size: 0.86rem;
    letter-spacing: 0.02em;
}

.review-sentence-text {
    font-size: 1.2rem;
    line-height: 1.65;
}

.review-translation {
    color: var(--text-secondary);
    border-top: 1px dashed var(--border);
    padding-top: 0.55rem;
}

.review-token-row {
    display: flex;
    gap: 0.45rem;
    flex-wrap: wrap;
}

.review-token-chip {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 0.8rem;
    padding: 0.15rem 0.55rem;
    color: var(--text-secondary);
}

.review-grammar-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.review-grammar-item {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    font-size: 0.86rem;
    color: var(--text-secondary);
}

.review-audio-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.6rem;
}

.review-due-time {
    color: var(--text-dim);
    font-size: 0.82rem;
}

.review-actions {
    display: flex;
    gap: 0.6rem;
    justify-content: flex-end;
    flex-wrap: wrap;
}

.review-heatmap {
    display: grid;
    grid-template-columns: repeat(14, 1fr);
    gap: 0.3rem;
    width: 100%;
    max-width: 360px;
}

.review-heatmap-cell {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 3px;
    background: var(--accent);
}

@media (max-width: 640px) {
    .review-header-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .review-actions {
        justify-content: stretch;
    }

    .review-actions .btn {
        flex: 1;
    }
}

/* ── Admin Page ─────────────────────────────────────────────────────── */
.admin-page { max-width: 700px; margin: 0 auto; }
.admin-page h2 { margin-bottom: 1.5rem; }
.admin-form { display: flex; flex-direction: column; gap: 1rem; }
.admin-form label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.9rem; color: var(--text-secondary); }
.admin-form input, .admin-form textarea, .admin-form select {
    background: var(--bg-secondary); color: var(--text-primary); border: 1px solid var(--border);
    padding: 0.6rem 0.8rem; border-radius: 6px; font-size: 1rem;
}
.admin-form textarea { font-family: monospace; resize: vertical; }
.upload-section, .json-section { border: 1px solid var(--border); border-radius: 8px; padding: 1rem; display: flex; flex-direction: column; gap: 0.8rem; }
.upload-section legend, .json-section legend { color: var(--text-secondary); font-size: 0.9rem; padding: 0 0.3rem; }
.error-list { list-style: disc inside; color: var(--error); font-size: 0.85rem; }

/* ── Browse section ─────────────────────────────────────────────────── */
.browse-section h2 { margin-bottom: 1rem; }
.catalog-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.catalog-header h2 { margin-bottom: 0; }
.language-select { background: var(--bg-secondary); color: var(--text-primary); border: 1px solid var(--border); padding: 0.4rem 0.8rem; border-radius: 6px; font-size: 0.9rem; }