:root {
    --bg: #f6f7fb;
    --bg-elev: #ffffff;
    --bg-soft: #eef1f7;
    --text: #0f172a;
    --text-dim: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-soft: #eef2ff;
    --accent: #ec4899;
    --success: #10b981;
    --success-soft: #d1fae5;
    --danger: #ef4444;
    --danger-soft: #fee2e2;
    --warn: #f59e0b;
    --shadow-sm: 0 1px 2px rgba(15,23,42,.04), 0 1px 3px rgba(15,23,42,.06);
    --shadow-md: 0 4px 12px rgba(15,23,42,.06), 0 2px 4px rgba(15,23,42,.04);
    --shadow-lg: 0 20px 40px -12px rgba(15,23,42,.12), 0 8px 16px -8px rgba(15,23,42,.08);
    --radius-sm: 8px;
    --radius: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
}

[data-theme="dark"] {
    --bg: #0b1020;
    --bg-elev: #141a30;
    --bg-soft: #1a2140;
    --text: #f1f5f9;
    --text-dim: #94a3b8;
    --text-muted: #64748b;
    --border: #262e4d;
    --primary: #818cf8;
    --primary-hover: #a5b4fc;
    --primary-soft: #1e2547;
    --success-soft: #064e3b;
    --danger-soft: #450a0a;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,.3);
    --shadow-lg: 0 20px 40px rgba(0,0,0,.4);
}

/* Sakura — нежно-розовая светлая тема */
[data-theme="sakura"] {
    --bg: #fff5f7;
    --bg-elev: #ffffff;
    --bg-soft: #ffe4ec;
    --text: #4a0d22;
    --text-dim: #8b3a55;
    --text-muted: #c98ba1;
    --border: #fbcfdc;
    --primary: #e0457b;
    --primary-hover: #c93268;
    --primary-soft: #ffd6e3;
    --accent: #ff85a2;
    --success: #16a34a;
    --success-soft: #dcfce7;
    --danger: #dc2626;
    --danger-soft: #fee2e2;
}

/* Matcha — спокойная зелёно-кремовая тема */
[data-theme="matcha"] {
    --bg: #f3f6ec;
    --bg-elev: #ffffff;
    --bg-soft: #e3ebd1;
    --text: #1f2e16;
    --text-dim: #4f6440;
    --text-muted: #8aa37a;
    --border: #cfdcb6;
    --primary: #5a8a3a;
    --primary-hover: #466b2c;
    --primary-soft: #e0ecd0;
    --accent: #c4a747;
    --success: #15803d;
    --success-soft: #d1fae5;
    --danger: #b91c1c;
    --danger-soft: #fee2e2;
}

*, *::before, *::after { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    min-height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    -webkit-font-smoothing: antialiased;
    -webkit-tap-highlight-color: transparent;
    transition: background .3s ease, color .3s ease;
    overflow-x: hidden;
    text-rendering: optimizeLegibility;
}

:root {
    --ease: cubic-bezier(.4, 0, .2, 1);
    --ease-out: cubic-bezier(.16, 1, .3, 1);
    --dur: .25s;
}

.chip-btn:active,
.group-card:active,
.chart-cell:active,
.nav-link:active,
.mode-tab:active,
.chart-tab:active,
.submode-tab:active,
.lang-btn:active,
.reveal-btn:active,
.install-btn:active,
.donate-link:active,
.icon-btn:active {
    transform: scale(.96);
    transition-duration: .08s;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .01ms !important;
        transition-duration: .01ms !important;
    }
}

@media (hover: none) {
    .group-card:hover,
    .chart-cell:hover,
    .donate-link:hover,
    .install-btn:hover {
        transform: none;
        box-shadow: none;
    }
}

body {
    padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

button, input { font-family: inherit; }
button { cursor: pointer; border: none; background: none; color: inherit; }

/* ---- Header ---- */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 20px;
    max-width: 900px;
    margin: 0 auto;
    border-bottom: 1px solid var(--border);
    position: relative;
    z-index: 60;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
}
.logo-mark {
    display: grid;
    place-items: center;
    width: 36px; height: 36px;
    border-radius: 10px;
    background: var(--text);
    color: var(--bg);
    font-size: 20px;
    font-weight: 700;
}
.logo-text { font-size: 18px; letter-spacing: -.3px; }
.logo-text b { color: var(--primary); }

.top-nav {
    display: flex;
    gap: 4px;
    background: var(--bg-soft);
    padding: 4px;
    border-radius: 999px;
}
.nav-link {
    padding: 8px 16px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-dim);
    transition: all .2s ease;
}
.nav-link:hover { color: var(--text); }
.nav-link.active {
    background: var(--bg-elev);
    color: var(--text);
    box-shadow: var(--shadow-sm);
}

.more-menu-wrap { position: relative; display: inline-block; }
.more-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    white-space: nowrap;
    line-height: 1;
}
.more-btn::after {
    content: '';
    display: inline-block;
    width: 0; height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid currentColor;
    margin-left: 2px;
    flex-shrink: 0;
}
.more-menu {
    position: fixed;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    padding: 6px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    z-index: 1000;
    min-width: 180px;
    animation: menu-in .15s var(--ease-out);
}
.more-menu[hidden] { display: none; }
.more-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    text-align: left;
    transition: background .15s ease;
    white-space: nowrap;
}
.more-option:hover { background: var(--bg-soft); }
.more-option.active { background: var(--primary-soft); color: var(--primary); }

.theme-toggle {
    display: grid;
    place-items: center;
    width: 40px; height: 40px;
    border-radius: 10px;
    color: var(--text-dim);
    transition: all .2s ease;
}
.theme-toggle:hover { background: var(--bg-soft); color: var(--text); }

.theme-menu-wrap { position: relative; }
.theme-menu {
    position: fixed;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    padding: 6px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    z-index: 1000;
    min-width: 180px;
    animation: menu-in .15s var(--ease-out);
}
.theme-menu[hidden] { display: none; }
@keyframes menu-in {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}
/* Каждая опция отрисована в цветах своей темы — мини-превью */
.theme-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 700;
    text-align: left;
    transition: transform .15s ease, box-shadow .15s ease;
    border: 1px solid;
}
.theme-option > * { color: inherit; }
.theme-option:hover { transform: translateY(-1px); box-shadow: 0 4px 10px rgba(0,0,0,.12); }
.theme-option.active { box-shadow: 0 0 0 2px currentColor; }

/* Light */
.theme-option[data-theme="light"] {
    background: #ffffff;
    color: #6366f1;
    border-color: #e2e8f0;
}
/* Dark */
.theme-option[data-theme="dark"] {
    background: #141a30;
    color: #a5b4fc;
    border-color: #262e4d;
}
/* Sakura */
.theme-option[data-theme="sakura"] {
    background: #fff5f7;
    color: #c93268;
    border-color: #fbcfdc;
}
/* Matcha */
.theme-option[data-theme="matcha"] {
    background: #f3f6ec;
    color: #466b2c;
    border-color: #cfdcb6;
}

.theme-swatch {
    width: 18px; height: 18px;
    border-radius: 50%;
    border: 1px solid currentColor;
    flex-shrink: 0;
    background-clip: padding-box;
    opacity: .9;
}

/* Daily ring */
.daily-ring {
    position: relative;
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    cursor: pointer;
    flex-shrink: 0;
}
.daily-ring svg {
    position: absolute;
    inset: 0;
}
.daily-ring-text {
    position: relative;
    font-size: 11px;
    font-weight: 700;
    color: var(--text);
    line-height: 1;
}
.daily-ring.complete .daily-ring-text::after {
    content: '✓';
    color: var(--success);
    display: block;
    font-size: 14px;
}
.daily-ring.complete .daily-ring-text { display: none; }
.daily-ring.complete { animation: pop .5s var(--ease-out); }
@keyframes pop {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

/* Category chips */
.category-chips {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 8px;
    margin-bottom: 16px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.category-chips[hidden] { display: none; }
.category-chips::-webkit-scrollbar { display: none; }
.category-chip {
    flex-shrink: 0;
    padding: 7px 12px;
    border-radius: 999px;
    background: var(--bg-soft);
    color: var(--text-dim);
    font-size: 12px;
    font-weight: 600;
    border: 1px solid transparent;
    white-space: nowrap;
    transition: all .2s ease;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}
.category-chip.active {
    background: var(--primary-soft);
    color: var(--primary);
    border-color: var(--primary);
}
.category-chip-icon { font-size: 13px; }

/* Match game */
.match-controls {
    display: flex;
    gap: 12px;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.match-tabs {
    display: flex;
    gap: 4px;
    background: var(--bg-soft);
    padding: 4px;
    border-radius: 12px;
}
.match-tab,
.match-mode-tab {
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-dim);
    transition: all .2s ease;
}
.match-tab.active,
.match-mode-tab.active {
    background: var(--bg-elev);
    color: var(--text);
    box-shadow: var(--shadow-sm);
}
.match-stats {
    display: flex;
    gap: 14px;
}
.match-stat {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}
.match-stat-label {
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: .8px;
    color: var(--text-muted);
    font-weight: 700;
}
.match-stat-value {
    font-size: 16px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.match-board {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 20px;
}
.match-col { display: flex; flex-direction: column; gap: 10px; }

.match-cell {
    padding: 14px 10px;
    border: 2px solid var(--border);
    background: var(--bg-elev);
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 22px;
    text-align: center;
    transition: all .2s var(--ease);
    min-height: 56px;
    display: grid;
    place-items: center;
}
.match-cell.kana {
    font-family: 'Hiragino Sans', 'Yu Gothic', sans-serif;
    font-size: 28px;
}
.match-cell.romaji { letter-spacing: 1px; }
.match-cell:hover { border-color: var(--primary); }
.match-cell.selected {
    border-color: var(--primary);
    background: var(--primary-soft);
    color: var(--primary);
    transform: scale(1.02);
}
.match-cell.wrong {
    border-color: var(--danger);
    background: var(--danger-soft);
    animation: soft-shake .3s var(--ease);
}
.match-cell.solved {
    opacity: .25;
    pointer-events: none;
    border-style: dashed;
    background: transparent;
}
.match-cell.matched {
    border-color: var(--success);
    background: var(--success-soft);
    color: var(--success);
}

.match-actions {
    text-align: center;
    margin-bottom: 20px;
}
.primary-btn {
    padding: 12px 24px;
    border-radius: var(--radius);
    background: var(--primary);
    color: white;
    font-weight: 700;
    font-size: 14px;
    transition: background .2s var(--ease);
}
.primary-btn:hover { background: var(--primary-hover); }

.match-result {
    text-align: center;
    padding: 28px 20px;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    animation: kana-in .4s var(--ease-out);
}
.match-result[hidden] { display: none; }
.match-result-emoji { font-size: 48px; margin-bottom: 8px; }
.match-result-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 6px;
}
.match-result-stats {
    font-size: 14px;
    color: var(--text-dim);
    margin-bottom: 16px;
    font-variant-numeric: tabular-nums;
}

/* ---- Main ---- */
.content {
    max-width: 900px;
    margin: 0 auto;
    padding: 24px 20px 60px;
}

.screen { display: none; }
.screen.active {
    display: block;
    animation: fadeIn .25s var(--ease-out);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.hero { text-align: center; margin-bottom: 24px; }
.hero-title {
    font-size: 36px;
    font-weight: 700;
    letter-spacing: -1px;
    margin: 0 0 6px;
}
.hero-sub {
    color: var(--text-dim);
    margin: 0;
    font-size: 14px;
}

/* ---- Mode tabs ---- */
.mode-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    background: var(--bg-soft);
    padding: 5px;
    border-radius: 14px;
    margin-bottom: 20px;
}
.mode-tab {
    flex: 1;
    min-width: 0;
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-dim);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: all .2s ease;
}
.mode-tab:hover { color: var(--text); }
.mode-tab.active {
    background: var(--bg-elev);
    color: var(--text);
    box-shadow: var(--shadow-sm);
}

/* ---- Chart ---- */
.chart-tabs {
    display: flex;
    gap: 4px;
    background: var(--bg-soft);
    padding: 5px;
    border-radius: 14px;
    margin-bottom: 28px;
}
.chart-tab {
    flex: 1;
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-dim);
    transition: all .2s ease;
}
.chart-tab.active {
    background: var(--bg-elev);
    color: var(--text);
    box-shadow: var(--shadow-sm);
}

.chart-section { margin-bottom: 32px; }
.chart-section-title {
    margin: 0 0 12px;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-dim);
}
.chart-section-title span {
    font-weight: 500;
    opacity: .6;
    letter-spacing: 0;
    margin-left: 8px;
    font-family: 'Hiragino Sans', 'Yu Gothic', sans-serif;
}

.chart-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
    gap: 8px;
}

.chart-cell {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    border: 1px solid var(--border);
    background: var(--bg-elev);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all .15s ease;
    padding: 8px 4px;
}
.chart-cell:hover {
    border-color: var(--primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}
.chart-cell.speaking {
    border-color: var(--primary);
    background: var(--primary-soft);
    transform: scale(.95);
}
.chart-kana {
    font-size: 26px;
    font-weight: 500;
    line-height: 1;
    font-family: 'Hiragino Sans', 'Yu Gothic', sans-serif;
}
.chart-romaji {
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: .5px;
    text-transform: uppercase;
    font-weight: 600;
}
.chart-cell.empty {
    background: transparent;
    border-style: dashed;
    cursor: default;
    opacity: .2;
}
.chart-cell.empty:hover { transform: none; box-shadow: none; }

/* ---- Submode / language switch ---- */
.submode-tabs {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.submode-tabs[hidden] { display: none; }
.submode-group {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    flex: 1;
    min-width: 0;
}
.submode-tab {
    padding: 8px 14px;
    border-radius: 10px;
    background: var(--bg-soft);
    color: var(--text-dim);
    font-size: 12px;
    font-weight: 600;
    transition: all .2s ease;
    border: 1px solid transparent;
    white-space: nowrap;
}
.submode-tab:hover { color: var(--text); }
.submode-tab.active {
    background: var(--primary-soft);
    color: var(--primary);
    border-color: var(--primary);
}

.lang-switch {
    display: flex;
    gap: 2px;
    background: var(--bg-soft);
    padding: 3px;
    border-radius: 8px;
    flex-shrink: 0;
}
.lang-btn {
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: .5px;
}
.lang-btn.active {
    background: var(--bg-elev);
    color: var(--text);
    box-shadow: var(--shadow-sm);
}

/* ---- Stats ---- */
.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 24px;
    padding: 14px;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}
.stat { text-align: center; }
.stat-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: .8px;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 4px;
}
.stat-value { font-size: 20px; font-weight: 700; }

/* ---- Card ---- */
.card-area {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.flashcard {
    flex: 1;
    aspect-ratio: 4 / 3;
    max-height: 340px;
    perspective: 1200px;
    cursor: pointer;
    position: relative;
}

.speak-btn {
    position: absolute;
    top: 14px;
    right: 14px;
    z-index: 2;
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--bg-soft);
    color: var(--text-dim);
    border: 1px solid var(--border);
    transition: all .2s ease;
    opacity: .75;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}
.speak-btn:hover {
    opacity: 1;
    color: var(--primary);
    background: var(--primary-soft);
    border-color: var(--primary);
}
.speak-btn.speaking {
    color: var(--primary);
    animation: pulse 1s ease infinite;
}
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.card-inner {
    position: relative;
    width: 100%; height: 100%;
    transform-style: preserve-3d;
    transition: transform .55s var(--ease-out);
    will-change: transform;
}
.flashcard.flipped .card-inner { transform: rotateY(180deg); }

.card-face {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 28px;
    border-radius: var(--radius-xl);
    background: var(--bg-elev);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform-style: preserve-3d;
    -webkit-transform-style: preserve-3d;
    text-align: center;
    transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.card-front {
    transform: rotateY(0deg) translateZ(1px);
}
.card-back {
    transform: rotateY(180deg) translateZ(1px);
    background: linear-gradient(145deg, var(--primary-soft), var(--bg-elev));
}

.card-kana {
    font-size: clamp(100px, 22vw, 180px);
    font-weight: 500;
    line-height: 1.1;
    font-family: 'Hiragino Sans', 'Yu Gothic', 'Meiryo', sans-serif;
    padding: 0 12px;
    max-width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: clip;
    transition: font-size .3s var(--ease);
}

.flashcard.appear .card-face {
    animation: kana-in .3s var(--ease-out) both;
}

@keyframes kana-in {
    from { opacity: .5; }
    to   { opacity: 1; }
}
/* Размер каны подстраивается по длине (через data-len) */
.card-kana[data-len="2"]  { font-size: clamp(90px, 20vw, 170px); }
.card-kana[data-len="3"]  { font-size: clamp(74px, 16vw, 140px); }
.card-kana[data-len="4"]  { font-size: clamp(58px, 13vw, 112px); }
.card-kana[data-len="5"]  { font-size: clamp(48px, 11vw, 92px); }
.card-kana[data-len="6"]  { font-size: clamp(40px, 9vw, 78px); }
.card-kana[data-len="7"]  { font-size: clamp(34px, 8vw, 68px); }
.card-kana[data-len="long"] { font-size: clamp(28px, 6.5vw, 56px); }

.card-kana.is-translation {
    white-space: normal;
    overflow: visible;
    overflow-wrap: break-word;
    word-break: normal;
    font-size: clamp(22px, 5vw, 34px);
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -.3px;
    font-family: inherit;
}
.card-hint {
    position: absolute;
    bottom: 20px;
    left: 0; right: 0;
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: .5px;
    text-transform: uppercase;
}
.card-romaji {
    position: absolute;
    bottom: 20px;
    left: 0; right: 0;
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 1px;
}

.card-area.correct .card-face {
    border-color: var(--success);
    box-shadow: 0 0 0 3px var(--success-soft), var(--shadow-lg);
}
.card-area.wrong .card-face {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px var(--danger-soft), var(--shadow-lg);
    animation: soft-shake .35s var(--ease);
}

@keyframes soft-shake {
    0%,100% { transform: translateX(0); }
    20% { transform: translateX(-4px); }
    40% { transform: translateX(3px); }
    60% { transform: translateX(-2px); }
    80% { transform: translateX(1px); }
}

.icon-btn {
    display: grid;
    place-items: center;
    width: 44px; height: 44px;
    border-radius: 50%;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 24px;
    transition: all .2s ease;
    flex-shrink: 0;
}
.icon-btn:hover { background: var(--primary-soft); color: var(--primary); border-color: var(--primary); }

/* ---- Input ---- */
.input-row {
    display: flex;
    gap: 10px;
    margin-bottom: 8px;
}
.answer-input {
    flex: 1;
    min-width: 0;
    padding: 14px 18px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-elev);
    color: var(--text);
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 1px;
    text-align: center;
    outline: none;
    transition: border-color .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease);
}
.answer-input::placeholder { color: var(--text-muted); font-weight: 400; letter-spacing: .5px; }
.answer-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-soft);
}

.reveal-btn {
    padding: 0 18px;
    border-radius: var(--radius);
    background: var(--text);
    color: var(--bg);
    font-weight: 700;
    font-size: 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    transition: background .25s var(--ease), color .25s var(--ease), transform .15s var(--ease);
    min-width: 110px;
    flex-shrink: 0;
}
.reveal-btn small {
    font-size: 10px;
    font-weight: 500;
    opacity: .6;
    letter-spacing: .5px;
}
.reveal-btn:hover { background: var(--primary); color: white; }

.feedback {
    text-align: center;
    min-height: 22px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 24px;
    letter-spacing: .3px;
    transition: color .25s var(--ease);
}
.feedback:not(:empty) {
    animation: feedback-in .3s var(--ease-out);
}
@keyframes feedback-in {
    from { opacity: 0; transform: translateY(-4px); }
    to   { opacity: 1; transform: translateY(0); }
}
.feedback.ok { color: var(--success); }
.feedback.err { color: var(--danger); }

/* ---- Groups ---- */
.groups-section {
    margin-top: 32px;
    padding-top: 28px;
    border-top: 1px solid var(--border);
}
.groups-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 10px;
}
.groups-header h2 {
    margin: 0;
    font-size: 16px;
    font-weight: 700;
}
.groups-actions { display: flex; gap: 6px; }
.chip-btn {
    padding: 6px 12px;
    border-radius: 999px;
    background: var(--bg-soft);
    color: var(--text-dim);
    font-size: 12px;
    font-weight: 600;
    transition: all .2s ease;
}
.chip-btn:hover { background: var(--primary-soft); color: var(--primary); }

.groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 10px;
}

.words-info {
    grid-column: 1 / -1;
    padding: 20px;
    background: var(--bg-elev);
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    color: var(--text-dim);
    font-size: 13px;
    line-height: 1.6;
    text-align: center;
}
.words-info b { color: var(--primary); font-weight: 700; }

.group-card {
    border: 2px solid var(--border);
    background: var(--bg-elev);
    border-radius: var(--radius);
    padding: 12px;
    cursor: pointer;
    transition: all .2s ease;
    display: flex;
    flex-direction: column;
    gap: 8px;
    text-align: left;
}
.group-card:hover { border-color: var(--primary); transform: translateY(-1px); }
.group-card.selected {
    border-color: var(--primary);
    background: var(--primary-soft);
}

.group-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.group-label {
    font-size: 20px;
    font-weight: 600;
    font-family: 'Hiragino Sans', 'Yu Gothic', sans-serif;
}
.group-check {
    width: 18px; height: 18px;
    border: 2px solid var(--border);
    border-radius: 6px;
    display: grid;
    place-items: center;
    transition: all .2s ease;
}
.group-card.selected .group-check {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}
.group-check svg { width: 12px; height: 12px; opacity: 0; }
.group-card.selected .group-check svg { opacity: 1; }

.group-chars {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    font-family: 'Hiragino Sans', 'Yu Gothic', sans-serif;
}
.group-char {
    font-size: 13px;
    padding: 2px 6px;
    border-radius: 6px;
    background: var(--bg-soft);
    color: var(--text-dim);
}
.group-card.selected .group-char {
    background: var(--bg-elev);
    color: var(--text);
}

/* ---- Footer ---- */
.app-footer {
    margin-top: 40px;
    text-align: center;
}
.install-btn {
    padding: 12px 24px;
    border-radius: 999px;
    background: var(--primary);
    color: white;
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 12px;
    transition: all .2s ease;
}
.install-btn:hover { background: var(--primary-hover); transform: translateY(-1px); }
.hint-text {
    font-size: 12px;
    color: var(--text-muted);
    margin: 0 0 20px;
}
.hint-text b { color: var(--text-dim); }

/* ---- Kanji grid ---- */
.kanji-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 8px;
}
.kanji-cell {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    border: 1px solid var(--border);
    background: var(--bg-elev);
    border-radius: var(--radius);
    padding: 8px 4px;
    cursor: pointer;
    transition: all .15s ease;
    position: relative;
}
.kanji-cell:hover { border-color: var(--primary); transform: translateY(-1px); }
.kanji-cell .kanji-glyph {
    font-size: 32px;
    font-weight: 500;
    line-height: 1;
    font-family: 'Hiragino Sans', 'Yu Gothic', sans-serif;
}
.kanji-cell .kanji-meaning {
    font-size: 10px;
    color: var(--text-muted);
    text-align: center;
    line-height: 1.2;
    padding: 0 4px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
}

/* Kanji detail card (in mnemonic popup container) */
.kanji-detail .mnemonic-kana { font-size: 96px; }
.kanji-readings {
    display: flex;
    flex-direction: column;
    gap: 8px;
    text-align: left;
    margin-top: 16px;
}
.kanji-reading-row {
    display: flex;
    gap: 10px;
    align-items: baseline;
    font-size: 14px;
}
.kanji-reading-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    font-weight: 700;
    min-width: 36px;
}
.kanji-reading-value {
    font-weight: 600;
    color: var(--text);
    font-family: 'Hiragino Sans', 'Yu Gothic', sans-serif;
}

/* ---- Phrases / Particles filter bar ---- */
.filter-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    flex-wrap: wrap;
    align-items: center;
}
.filter-search {
    flex: 1;
    min-width: 180px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--bg-elev);
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.filter-search::placeholder { color: var(--text-muted); }
.filter-search:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-soft);
}
.filter-select {
    padding: 10px 14px;
    padding-right: 30px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--bg-elev);
    color: var(--text);
    font-size: 13px;
    font-weight: 600;
    font-family: inherit;
    outline: none;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: linear-gradient(45deg, transparent 50%, currentColor 50%), linear-gradient(135deg, currentColor 50%, transparent 50%);
    background-position: calc(100% - 14px) center, calc(100% - 9px) center;
    background-size: 5px 5px, 5px 5px;
    background-repeat: no-repeat;
}
.filter-select:focus { border-color: var(--primary); }
.filter-empty {
    text-align: center;
    color: var(--text-muted);
    padding: 28px 0;
    font-size: 14px;
}

/* ---- Phrases ---- */
.lang-switch-standalone {
    margin: 0;
    width: fit-content;
}
.phrase-section { margin-bottom: 28px; }
.phrase-section-title {
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-dim);
    margin: 0 0 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.phrase-section-title .phrase-section-icon { font-size: 16px; }
.phrase-card {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 16px;
    margin-bottom: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: relative;
}
.phrase-jp {
    font-size: 22px;
    font-weight: 500;
    font-family: 'Hiragino Sans', 'Yu Gothic', sans-serif;
    line-height: 1.3;
    padding-right: 44px;
}
.phrase-romaji {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: .5px;
}
.phrase-meaning {
    font-size: 14px;
    color: var(--text);
    margin-top: 4px;
}
.phrase-note {
    font-size: 12px;
    color: var(--text-dim);
    margin-top: 6px;
    padding-top: 6px;
    border-top: 1px dashed var(--border);
    line-height: 1.5;
}
.phrase-speak {
    position: absolute;
    top: 12px; right: 12px;
    width: 34px; height: 34px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--bg-soft);
    color: var(--text-dim);
    transition: all .2s ease;
}
.phrase-speak:hover { background: var(--primary-soft); color: var(--primary); }

/* ---- Particles ---- */
.particle-card {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
    margin-bottom: 10px;
}
.particle-head {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 8px;
}
.particle-glyph {
    font-size: 36px;
    font-weight: 500;
    color: var(--primary);
    font-family: 'Hiragino Sans', 'Yu Gothic', sans-serif;
    line-height: 1;
}
.particle-romaji {
    font-size: 13px;
    color: var(--text-muted);
    letter-spacing: 1px;
    font-weight: 600;
    text-transform: uppercase;
}
.particle-role {
    font-size: 13px;
    font-weight: 700;
    color: var(--text);
    margin-left: auto;
    text-align: right;
}
.particle-level {
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    letter-spacing: .5px;
}
.particle-desc {
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.5;
    margin-bottom: 10px;
}
.particle-examples { display: flex; flex-direction: column; gap: 6px; }
.particle-example {
    background: var(--bg-soft);
    border-radius: 8px;
    padding: 8px 10px;
    font-size: 13px;
}
.particle-example-jp {
    font-family: 'Hiragino Sans', 'Yu Gothic', sans-serif;
    font-size: 15px;
    margin-bottom: 2px;
}
.particle-example-romaji {
    font-size: 11px;
    color: var(--text-muted);
}
.particle-example-tr {
    font-size: 12px;
    color: var(--text-dim);
    margin-top: 2px;
}
.particle-note {
    font-size: 12px;
    color: var(--text-dim);
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px dashed var(--border);
}

/* ---- Exam: JLPT level cards ---- */
.exam-level-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 10px;
    margin-bottom: 20px;
}
.level-card {
    border: 2px solid var(--border);
    background: var(--bg-elev);
    border-radius: var(--radius);
    padding: 16px 14px;
    text-align: left;
    transition: all .2s ease;
    cursor: pointer;
}
.level-card:hover { border-color: var(--primary); transform: translateY(-2px); }
.level-card.active {
    border-color: var(--primary);
    background: var(--primary-soft);
}
.level-name {
    font-size: 26px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 6px;
}
.level-desc {
    font-size: 12px;
    color: var(--text-dim);
    line-height: 1.4;
}

/* Past results */
.exam-history { margin-top: 28px; }
.exam-history-row {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px 14px;
    margin-bottom: 6px;
    font-size: 13px;
}
.exam-history-level {
    font-weight: 700;
    color: var(--primary);
    min-width: 30px;
}
.exam-history-score { font-weight: 700; font-variant-numeric: tabular-nums; }
.exam-history-grade {
    margin-left: auto;
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 999px;
    font-weight: 700;
}
.exam-history-grade[data-pass="1"] { background: var(--success-soft); color: var(--success); }
.exam-history-grade[data-pass="0"] { background: var(--danger-soft); color: var(--danger); }
.exam-history-date { font-size: 11px; color: var(--text-muted); }

/* Exam runtime meta */
.exam-meta {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    align-items: center;
}
.exam-meta-level {
    font-size: 11px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
}
.exam-meta-section {
    font-size: 11px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: .8px;
    font-weight: 600;
}
.exam-question-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    font-weight: 700;
    margin-bottom: 12px;
}
.exam-choices {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
    margin-top: 8px;
}
@media (min-width: 480px) {
    .exam-choices { grid-template-columns: 1fr 1fr; }
}
.exam-choice {
    text-align: left;
    padding: 14px 16px;
    border: 2px solid var(--border);
    background: var(--bg-elev);
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    transition: all .15s ease;
    display: flex;
    gap: 10px;
    align-items: center;
}
.exam-choice:hover { border-color: var(--primary); transform: translateY(-1px); }
.exam-choice.correct {
    border-color: var(--success);
    background: var(--success-soft);
    color: var(--success);
}
.exam-choice.wrong {
    border-color: var(--danger);
    background: var(--danger-soft);
    color: var(--danger);
}
.exam-choice .exam-choice-letter {
    width: 24px; height: 24px;
    border-radius: 50%;
    background: var(--bg-soft);
    color: var(--text-dim);
    display: grid;
    place-items: center;
    font-size: 11px;
    font-weight: 700;
    flex-shrink: 0;
}
.exam-choice.correct .exam-choice-letter { background: var(--success); color: white; }
.exam-choice.wrong .exam-choice-letter   { background: var(--danger);  color: white; }

/* Certificate */
.exam-cert {
    background: linear-gradient(145deg, var(--primary-soft), var(--bg-elev));
    border: 2px solid var(--primary);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.exam-cert::before {
    content: '';
    position: absolute;
    inset: 6px;
    border: 1px dashed var(--primary);
    border-radius: 16px;
    pointer-events: none;
    opacity: .35;
}
.exam-cert-stamp {
    display: inline-block;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 4px;
    padding: 4px 12px;
    border: 2px solid var(--primary);
    border-radius: 999px;
    color: var(--primary);
    margin-bottom: 8px;
}
.exam-cert-title {
    font-size: 13px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 700;
    margin-bottom: 8px;
}
.exam-cert-level {
    font-size: 64px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin: 8px 0;
}
.exam-grade {
    font-size: 18px;
    font-weight: 700;
    margin: 8px 0 4px;
}
.exam-grade[data-pass="1"] { color: var(--success); }
.exam-grade[data-pass="0"] { color: var(--danger); }

/* ---- Exam ---- */
.exam-row { display: flex; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.exam-row label {
    flex: 1;
    min-width: 140px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .8px;
    color: var(--text-muted);
}
.exam-row select {
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg-elev);
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
    font-weight: 600;
    outline: none;
}
.exam-row select:focus { border-color: var(--primary); }

.exam-progress {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}
.exam-progress-bar {
    flex: 1;
    height: 8px;
    background: var(--bg-soft);
    border-radius: 999px;
    overflow: hidden;
}
.exam-progress-bar > div {
    height: 100%;
    background: var(--primary);
    width: 0;
    transition: width .3s var(--ease);
    border-radius: inherit;
}
.exam-progress-text {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-dim);
    font-variant-numeric: tabular-nums;
    min-width: 60px;
    text-align: right;
}
.exam-card {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    margin-bottom: 16px;
}
.exam-prompt {
    font-size: clamp(48px, 12vw, 96px);
    font-weight: 500;
    line-height: 1.2;
    margin-bottom: 24px;
    font-family: 'Hiragino Sans', 'Yu Gothic', sans-serif;
    word-break: break-word;
}
.exam-prompt.is-translation {
    font-family: inherit;
    font-size: clamp(20px, 5vw, 32px);
    font-weight: 600;
}
.exam-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
}
.exam-score {
    font-size: 56px;
    font-weight: 700;
    text-align: center;
    color: var(--primary);
    margin: 16px 0 4px;
    font-variant-numeric: tabular-nums;
}
.exam-summary {
    text-align: center;
    color: var(--text-dim);
    font-size: 14px;
}
.exam-mistake {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-left: 3px solid var(--danger);
    border-radius: 10px;
    padding: 10px 14px;
    margin-bottom: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}
.exam-mistake-q {
    font-family: 'Hiragino Sans', 'Yu Gothic', sans-serif;
    font-size: 18px;
    font-weight: 600;
}
.exam-mistake-a {
    font-size: 13px;
    color: var(--text-dim);
    text-align: right;
}
.exam-mistake-a b { color: var(--success); }
.exam-mistake-a s { color: var(--danger); opacity: .7; }

/* ---- Stats ---- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 10px;
    margin-bottom: 28px;
}
.stat-card {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px;
    text-align: center;
}
.stat-card-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: .8px;
    color: var(--text-muted);
    font-weight: 700;
    margin-bottom: 6px;
}
.stat-card-value {
    font-size: 22px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}
.heatmap {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 4px;
    margin-bottom: 28px;
}
.heatmap-cell {
    aspect-ratio: 1;
    border-radius: 4px;
    background: var(--bg-soft);
    position: relative;
    cursor: pointer;
}
.heatmap-cell[data-level="1"] { background: color-mix(in srgb, var(--primary) 25%, var(--bg-soft)); }
.heatmap-cell[data-level="2"] { background: color-mix(in srgb, var(--primary) 50%, var(--bg-soft)); }
.heatmap-cell[data-level="3"] { background: color-mix(in srgb, var(--primary) 75%, var(--bg-soft)); }
.heatmap-cell[data-level="4"] { background: var(--primary); }
.heatmap-cell[data-today="1"] { outline: 2px solid var(--accent); outline-offset: 1px; }

.ach-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 10px;
}
.ach-card {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px;
    text-align: center;
    opacity: .35;
    transition: opacity .2s ease, transform .2s ease;
}
.ach-card.unlocked { opacity: 1; }
.ach-card.unlocked:hover { transform: translateY(-2px); }
.ach-icon { font-size: 32px; line-height: 1; margin-bottom: 6px; }
.ach-title {
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 4px;
}
.ach-desc {
    font-size: 11px;
    color: var(--text-dim);
    line-height: 1.4;
}

/* ---- Danger zone ---- */
.danger-zone {
    border: 1px dashed var(--danger);
    border-radius: var(--radius);
    padding: 16px;
    background: color-mix(in srgb, var(--danger-soft) 50%, var(--bg-elev));
    text-align: center;
}
.danger-text {
    font-size: 13px;
    color: var(--text-dim);
    margin: 0 0 12px;
    line-height: 1.5;
}
.danger-btn {
    padding: 10px 20px;
    border-radius: 999px;
    background: var(--danger);
    color: white;
    font-weight: 700;
    font-size: 13px;
    transition: opacity .15s ease, transform .15s ease;
}
.danger-btn:hover { opacity: .85; transform: translateY(-1px); }

/* ---- Achievement category headers ---- */
.ach-cat-title {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-dim);
    font-weight: 700;
    margin: 18px 0 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.ach-cat-title .ach-cat-icon { font-size: 16px; }
.ach-cat-title .ach-cat-count {
    margin-left: auto;
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 600;
    letter-spacing: .5px;
    text-transform: none;
}

/* ---- Mnemonic popup ---- */
.mnemonic-popup {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, .55);
    display: grid;
    place-items: center;
    z-index: 100;
    padding: 20px;
    animation: fadeIn .2s var(--ease-out);
}
.mnemonic-popup[hidden] { display: none; }
.mnemonic-card {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px 24px 24px;
    max-width: 320px;
    width: 100%;
    text-align: center;
    box-shadow: var(--shadow-lg);
    position: relative;
    animation: kana-in .25s var(--ease-out);
}
.mnemonic-close {
    position: absolute;
    top: 8px; right: 12px;
    width: 32px; height: 32px;
    border-radius: 50%;
    color: var(--text-muted);
    font-size: 22px;
    line-height: 1;
}
.mnemonic-close:hover { background: var(--bg-soft); color: var(--text); }
.mnemonic-kana {
    font-size: 72px;
    font-weight: 500;
    line-height: 1;
    font-family: 'Hiragino Sans', 'Yu Gothic', sans-serif;
    color: var(--primary);
    margin-bottom: 4px;
}
.mnemonic-romaji {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 18px;
}
.mnemonic-emoji {
    font-size: 56px;
    margin-bottom: 12px;
    line-height: 1;
}
.mnemonic-text {
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.5;
}

/* ---- Toast ---- */
.toast-host {
    position: fixed;
    bottom: env(safe-area-inset-bottom, 16px);
    left: 0; right: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px;
    pointer-events: none;
    z-index: 90;
}
.toast {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 10px 18px;
    box-shadow: var(--shadow-lg);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    pointer-events: auto;
    animation: toast-in .3s var(--ease-out), toast-out .3s var(--ease-out) 3.4s forwards;
    max-width: min(420px, calc(100% - 32px));
}
.toast .toast-emoji { font-size: 18px; }
@keyframes toast-in {
    from { opacity: 0; transform: translateY(20px) scale(.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes toast-out {
    to { opacity: 0; transform: translateY(20px) scale(.95); }
}

.donate-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 999px;
    background: linear-gradient(135deg, #ec4899, #f97316);
    color: white;
    text-decoration: none;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .3px;
    box-shadow: 0 6px 20px -8px rgba(236, 72, 153, .6);
    transition: transform .2s ease, box-shadow .2s ease;
}
.donate-link:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 24px -8px rgba(236, 72, 153, .7);
}
.donate-link svg { flex-shrink: 0; }
.donate-hint {
    font-size: 11px;
    color: var(--text-muted);
    margin: 10px 0 0;
}

/* ---- Tablet ---- */
@media (max-width: 840px) {
    .groups-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
}

/* ---- Mobile ---- */
@media (max-width: 640px) {
    .app-header {
        padding: 10px 14px;
        gap: 10px;
        flex-wrap: wrap;
    }
    .logo { gap: 8px; margin-right: auto; }
    .logo-mark { width: 32px; height: 32px; font-size: 18px; border-radius: 9px; }
    .logo-text { font-size: 15px; }

    .top-nav {
        order: 3;
        width: 100%;
        padding: 3px;
        gap: 2px;
        justify-content: stretch;
        min-width: 0;
    }
    .nav-link {
        padding: 8px 10px;
        font-size: 12px;
        flex: 1;
        min-width: 0;
    }
    .more-menu-wrap { flex: 1; min-width: 0; display: flex; }
    .more-btn {
        width: 100%;
        padding: 8px 6px;
        font-size: 11px;
        gap: 2px;
    }
    .more-btn::after {
        border-left-width: 3px;
        border-right-width: 3px;
        border-top-width: 3px;
        margin-left: 1px;
    }
    .more-menu { right: 8px; left: auto; min-width: 180px; max-width: calc(100vw - 16px); }
    .theme-menu { min-width: 180px; }
    .theme-toggle {
        width: 36px; height: 36px;
        flex-shrink: 0;
    }

    .content { padding: 18px 14px 40px; }

    .hero { margin-bottom: 18px; }
    .hero-title { font-size: 26px; }
    .hero-sub { font-size: 13px; }

    .mode-tabs {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        padding: 4px;
        margin-bottom: 16px;
        gap: 4px;
    }
    .mode-tab {
        padding: 9px 6px;
        font-size: 12px;
        min-width: 0;
        text-overflow: clip;
    }

    .stats-row {
        padding: 10px 6px;
        gap: 4px;
        margin-bottom: 18px;
        border-radius: 12px;
    }
    .stat-label { font-size: 8px; letter-spacing: .3px; }
    .stat-value { font-size: 15px; }

    .chart-grid { grid-template-columns: repeat(auto-fill, minmax(60px, 1fr)); gap: 6px; }
    .chart-kana { font-size: 22px; }
    .chart-romaji { font-size: 9px; }
    .speak-btn { width: 34px; height: 34px; top: 10px; right: 10px; }

    .daily-ring { width: 34px; height: 34px; }
    .daily-ring svg { width: 34px; height: 34px; }
    .daily-ring-text { font-size: 10px; }

    .match-controls { gap: 8px; }
    .match-stat-value { font-size: 14px; }
    .match-board { gap: 8px; }
    .match-cell { padding: 12px 8px; min-height: 50px; font-size: 18px; }
    .match-cell.kana { font-size: 24px; }
    .category-chip { padding: 6px 10px; font-size: 11px; }

    .card-area {
        gap: 4px;
        margin-bottom: 14px;
    }
    .icon-btn {
        width: 28px;
        height: 28px;
        font-size: 18px;
        line-height: 1;
        background: transparent;
        border: none;
        opacity: .5;
    }
    .icon-btn:hover {
        background: transparent;
        opacity: 1;
        color: var(--primary);
    }
    .flashcard {
        aspect-ratio: auto;
        height: 240px;
        max-height: none;
    }
    .card-face {
        padding: 16px;
        border-radius: 20px;
    }
    .card-kana { font-size: clamp(90px, 32vw, 150px); }
    .card-hint {
        bottom: 14px;
        font-size: 10px;
        padding: 0 12px;
        letter-spacing: .8px;
    }
    .card-romaji {
        bottom: 16px;
        font-size: 22px;
    }

    .input-row {
        gap: 8px;
        margin-bottom: 8px;
    }
    .answer-input {
        padding: 13px 14px;
        font-size: 16px; /* 16+ чтобы iOS не зумил */
        border-radius: 12px;
        letter-spacing: .5px;
    }
    .reveal-btn {
        min-width: 88px;
        padding: 0 12px;
        font-size: 12px;
        border-radius: 12px;
        gap: 0;
    }
    .reveal-btn small { font-size: 9px; }

    .feedback {
        font-size: 12px;
        margin-bottom: 20px;
        min-height: 18px;
    }

    .groups-section {
        margin-top: 24px;
        padding-top: 20px;
    }
    .groups-header h2 { font-size: 15px; }
    .chip-btn { padding: 5px 10px; font-size: 11px; }

    .groups-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 8px;
    }
    .group-card {
        padding: 10px;
        gap: 6px;
        border-width: 1.5px;
    }
    .group-label { font-size: 17px; }
    .group-check { width: 16px; height: 16px; }
    .group-char { font-size: 11px; padding: 1px 5px; }

    .app-footer { margin-top: 28px; }
    .install-btn {
        padding: 11px 20px;
        font-size: 13px;
        width: 100%;
    }
    .hint-text { font-size: 11px; padding: 0 8px; }
}

/* ---- Small mobile ---- */
@media (max-width: 380px) {
    .nav-link { padding: 8px 6px; font-size: 11px; }
    .logo-text { font-size: 14px; }
    .hero-title { font-size: 22px; }
    .groups-grid { grid-template-columns: repeat(auto-fill, minmax(88px, 1fr)); }
    .flashcard { height: 200px; }
    .card-kana { font-size: clamp(70px, 28vw, 120px); }
}

/* ---- Landscape phones ---- */
@media (max-height: 500px) and (orientation: landscape) {
    .flashcard { height: 160px; }
    .card-kana { font-size: clamp(60px, 18vw, 100px); }
    .hero { margin-bottom: 12px; }
    .stats-row { margin-bottom: 12px; }
}