/* =============================================================
   Styles for the parts added in the Supabase rewrite: tabs, filters,
   grading, quiz and typing modes, browse, stats.
   Same tokens, same 2px corners, same muted palette as styles.css.
   ============================================================= */

:root {
    --info-color: #8c9aa8;
    --heat-0: #e8e8e2;
    --heat-1: #cdd6cf;
    --heat-2: #a8b8ac;
    --heat-3: #7a8a7f;
    --heat-4: #56655b;
}

/* `hidden` must win over the display rules in styles.css */
[hidden] { display: none !important; }
.modal:not([hidden]) { display: flex; }

/* ===================== TABS ===================== */
.tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.tab {
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    padding: 10px 18px;
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.tab:hover { color: var(--text-color); }

.tab.is-active {
    color: var(--text-color);
    border-bottom-color: var(--primary-color);
}

/* ===================== DAILY GOAL ===================== */
.goal-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: -14px 0 24px;
}

.goal-bar-track {
    flex: 1;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}

.goal-bar-fill {
    height: 100%;
    width: 0;
    background: var(--success-color);
    transition: width 0.4s ease;
}

.goal-bar-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
}

/* ===================== FILTERS ===================== */
.filters {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 2px;
    padding: 14px 18px;
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.filter-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.chips { display: flex; gap: 6px; flex-wrap: wrap; }

.chip {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 2px;
    padding: 4px 12px;
    font-family: inherit;
    font-size: 0.75rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
}

.chip:hover { border-color: var(--primary-color); color: var(--text-color); }

.chip.is-active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--card-bg);
}

.select-input {
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--text-color);
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 2px;
    padding: 7px 10px;
    transition: border-color 0.2s ease;
}

.select-input:focus { outline: none; border-color: var(--primary-color); }

.search-input { flex: 1; min-width: 200px; }

/* ===================== CARD EXTRAS ===================== */
.speak-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 2px;
    padding: 2px 8px;
    font-size: 0.875rem;
    cursor: pointer;
    line-height: 1.6;
    transition: border-color 0.2s ease, transform 0.15s ease;
}

.speak-btn:hover { border-color: var(--primary-color); transform: scale(1.06); }
.speak-btn:active { transform: scale(0.96); }

.card-schedule {
    margin-top: 10px;
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.03em;
}

kbd {
    font-family: inherit;
    font-size: 0.6875rem;
    border: 1px solid var(--border-color);
    border-bottom-width: 2px;
    border-radius: 2px;
    padding: 0 5px;
    color: var(--text-muted);
    background: var(--bg-color);
}

/* ===================== GRADING ===================== */
.action-group { flex-direction: column; }

.grade-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    width: 100%;
}

.btn-grade {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    background: var(--card-bg);
    color: var(--text-color);
    padding: 10px 8px;
}

.grade-label { font-size: 0.875rem; }
.grade-hint { font-size: 0.6875rem; color: var(--text-muted); }

.btn-grade-again:hover { background: var(--danger-color);  color: var(--card-bg); border-color: var(--danger-color); }
.btn-grade-hard:hover  { background: var(--warning-color); color: var(--card-bg); border-color: var(--warning-color); }
.btn-grade-good:hover  { background: var(--success-color); color: var(--card-bg); border-color: var(--success-color); }
.btn-grade-easy:hover  { background: var(--info-color);    color: var(--card-bg); border-color: var(--info-color); }
.btn-grade:hover .grade-hint { color: inherit; opacity: 0.85; }

.btn-grade-again { border-bottom: 2px solid var(--danger-color); }
.btn-grade-hard  { border-bottom: 2px solid var(--warning-color); }
.btn-grade-good  { border-bottom: 2px solid var(--success-color); }
.btn-grade-easy  { border-bottom: 2px solid var(--info-color); }

.secondary-row {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================== QUIZ MODE ===================== */
.quiz-options {
    display: grid;
    gap: 8px;
    margin-top: 24px;
}

.quiz-option {
    text-align: left;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 2px;
    padding: 12px 16px;
    font-family: inherit;
    font-size: 0.9375rem;
    color: var(--text-color);
    cursor: pointer;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.quiz-option:hover { border-color: var(--primary-color); }

.quiz-options.is-answered .quiz-option { cursor: default; }

.quiz-option.is-correct {
    background: var(--success-color);
    border-color: var(--success-color);
    color: var(--card-bg);
}

.quiz-option.is-wrong {
    background: var(--danger-color);
    border-color: var(--danger-color);
    color: var(--card-bg);
}

/* ===================== TYPING MODE ===================== */
.typing-box {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.typing-box .select-input { width: 100%; padding: 12px 14px; font-size: 1rem; }

.typing-feedback { font-size: 0.875rem; min-height: 1.4em; }
.typing-feedback.is-correct { color: var(--success-color); }
.typing-feedback.is-wrong   { color: var(--danger-color); }

/* ===================== BROWSE ===================== */
.word-table {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}

.word-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 18px;
    border-bottom: 1px solid var(--border-color);
}

.word-row:last-child { border-bottom: none; }
.word-row:hover { background: var(--bg-color); }

.word-row-main { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.word-row-main strong { font-weight: 500; }

.word-row-meta { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }

.status-badge {
    font-size: 0.6875rem;
    padding: 2px 8px;
    border-radius: 2px;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    white-space: nowrap;
}

.status-learning  { border-color: var(--warning-color); color: var(--warning-color); }
.status-review    { border-color: var(--info-color);    color: var(--info-color); }
.status-mastered  { border-color: var(--success-color); color: var(--success-color); }
.status-suspended { background: var(--success-color); border-color: var(--success-color); color: var(--card-bg); }

/* ===================== STATS ===================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
}

.panel {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 2px;
    padding: 20px 24px;
    margin-bottom: 24px;
}

.panel-title {
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.level-bars { display: flex; flex-direction: column; gap: 10px; }

.level-bar { display: flex; align-items: center; gap: 12px; }
.level-bar-name  { width: 28px; font-size: 0.8125rem; color: var(--text-muted); }
.level-bar-value { width: 80px; text-align: right; font-size: 0.75rem; color: var(--text-muted); }

.level-bar-track {
    flex: 1;
    height: 6px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}

.level-bar-fill {
    display: block;
    height: 100%;
    background: var(--success-color);
    transition: width 0.5s ease;
}

.heatmap {
    display: flex;
    gap: 3px;
    overflow-x: auto;
    padding-bottom: 6px;
}

.hm-week { display: flex; flex-direction: column; gap: 3px; }

.heatmap i,
.heatmap-legend i {
    width: 10px;
    height: 10px;
    border-radius: 1px;
    display: block;
    background: var(--heat-0);
}

.hm-0 { background: var(--heat-0); }
.hm-1 { background: var(--heat-1); }
.hm-2 { background: var(--heat-2); }
.hm-3 { background: var(--heat-3); }
.hm-4 { background: var(--heat-4); }
.hm-future { background: transparent; }

.heatmap-legend {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-top: 10px;
    font-size: 0.6875rem;
    color: var(--text-muted);
}

/* ===================== AUTH / MODAL / MISC ===================== */
.auth-error {
    color: var(--danger-color);
    font-size: 0.8125rem;
    margin-bottom: 12px;
}

.link-btn {
    background: none;
    border: none;
    padding: 0;
    font-family: inherit;
    font-size: inherit;
    color: var(--primary-color);
    text-decoration: underline;
    cursor: pointer;
}

.modal-search { padding: 0 24px 12px; }
.modal-search .select-input { width: 100%; }

.conn-ok  { color: var(--success-color); }
.conn-off { color: var(--danger-color); }

.toast {
    position: fixed;
    left: 50%;
    bottom: 28px;
    transform: translateX(-50%);
    background: var(--text-color);
    color: var(--bg-color);
    padding: 10px 20px;
    border-radius: 2px;
    font-size: 0.875rem;
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    max-width: 90vw;
    animation: fadeIn 0.2s ease;
}

/* ===================== EXAMPLE SENTENCE ===================== */
.example-block { border-top: 1px solid var(--border-color); padding-top: 12px; }

.example-en {
    font-style: italic;
    color: var(--text-color);
}

.example-th {
    color: var(--text-muted);
    font-size: 0.9375rem;
    margin-top: 2px;
}

/* ===================== FORECAST ===================== */
.forecast {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
    align-items: end;
    min-height: 130px;
}

.forecast-day {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
    height: 130px;
}

.forecast-count { font-size: 0.75rem; color: var(--text-muted); }

.forecast-bar {
    width: 100%;
    max-width: 44px;
    min-height: 3px;
    background: var(--info-color);
    border-radius: 2px 2px 0 0;
    transition: height 0.4s ease;
}

.forecast-day:first-child .forecast-bar { background: var(--warning-color); }

.forecast-label { font-size: 0.6875rem; color: var(--text-muted); }

/* ===================== SETTINGS HINTS ===================== */
.field-hint {
    margin-top: 10px;
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 768px) {
    /* styles.css stacks the stat cards one per row; four of them fills the
       screen before you reach a card, so lay them out two by two instead */
    .stats { flex-direction: row; flex-wrap: wrap; gap: 10px; }
    .stats .stat-item { flex: 1 1 40%; padding: 12px 8px; }
    .stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
    .stat-label { font-size: 0.6875rem; }
    .stat-value { font-size: 1.5rem; }
    .grade-row { grid-template-columns: repeat(2, 1fr); }
    .tab { padding: 10px 12px; font-size: 0.8125rem; }
    .goal-bar { flex-direction: column; align-items: stretch; gap: 6px; }
    .word-row { flex-direction: column; align-items: flex-start; gap: 6px; }
    kbd { display: none; }
}

@media (max-width: 480px) {
    .tabs { justify-content: space-between; }
    .tab { flex: 1; padding: 10px 4px; }
    .filters { padding: 12px 14px; }
}

/* =============================================================
   Auth, plans, leaderboard and badges — same tokens as above.
   ============================================================= */

:root {
    --pro-color: #a08a5c;
    --pro-bg: #f5efe1;
}

/* ===================== AUTH ===================== */
.auth-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 28px;
    border-bottom: 1px solid var(--border-color);
}

.auth-tab {
    flex: 1;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    padding: 10px 6px;
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.auth-tab:hover { color: var(--text-color); }
.auth-tab.is-active { color: var(--text-color); border-bottom-color: var(--primary-color); }

.auth-notice {
    color: var(--success-color);
    font-size: 0.8125rem;
    margin-bottom: 12px;
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 18px 0 14px;
    color: var(--text-muted);
    font-size: 0.75rem;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.btn-oauth {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    background: var(--card-bg);
    color: var(--text-color);
}

.btn-oauth + .btn-oauth { margin-top: 8px; }
.btn-oauth:hover { border-color: var(--primary-color); }

/* ===================== PLAN CHROME ===================== */
.plan-pill {
    display: inline-block;
    background: var(--pro-color);
    color: var(--card-bg);
    font-size: 0.6875rem;
    letter-spacing: 0.08em;
    padding: 3px 9px;
    border-radius: 2px;
    align-self: center;
}

.tab-pro.is-active { border-bottom-color: var(--pro-color); }

.btn-pro {
    background: var(--pro-color);
    color: var(--card-bg);
    border-color: var(--pro-color);
}

.btn-pro:hover { background: #8d7950; border-color: #8d7950; }

.banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
    background: var(--pro-bg);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--warning-color);
    border-radius: 2px;
    padding: 12px 16px;
    margin-bottom: 20px;
    font-size: 0.875rem;
}

.chip.is-locked { opacity: 0.45; cursor: not-allowed; }
.chip:disabled { cursor: not-allowed; }

.pro-lock {
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.pro-lock p { margin-bottom: 12px; }
.pro-lock.is-block { border: 1px dashed var(--border-color); border-radius: 2px; }

.level-bar.is-locked { opacity: 0.5; }

.word-row.is-locked { opacity: 0.55; }

/* ===================== PRO PAGE ===================== */
.pro-hero { border-left: 3px solid var(--pro-color); }

.pro-hero-title {
    font-size: 1.125rem;
    font-weight: 400;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.pro-features { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.pro-features li { font-size: 0.9375rem; }

.pro-status {
    margin-top: 16px;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.plan-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 12px;
}

.plan-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 4px;
    text-align: left;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 2px;
    padding: 18px 16px;
    font-family: inherit;
    color: var(--text-color);
    cursor: pointer;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.plan-card:hover { border-color: var(--pro-color); }

.plan-card.is-selected {
    border-color: var(--pro-color);
    box-shadow: inset 0 0 0 1px var(--pro-color);
    background: var(--pro-bg);
}

.plan-badge {
    position: absolute;
    top: -9px;
    right: 12px;
    background: var(--success-color);
    color: var(--card-bg);
    font-size: 0.6875rem;
    padding: 2px 8px;
    border-radius: 2px;
}

.plan-name  { font-size: 0.8125rem; color: var(--text-muted); }
.plan-price { font-size: 1.75rem; font-weight: 300; }
.plan-per   { font-size: 0.75rem; color: var(--text-muted); }

.card-small { max-width: 92px; }

.qr-box { text-align: center; margin-top: 20px; }
.qr-title { font-size: 0.875rem; color: var(--text-muted); margin-bottom: 12px; }
.qr-amount { font-size: 1.05rem; font-weight: 600; margin: 10px 0 4px; }
#slipUpload { margin: 12px 0; display: grid; gap: 8px; justify-items: center; }
#slipFile { max-width: 280px; }
.qr-image { width: 220px; max-width: 100%; border: 1px solid var(--border-color); border-radius: 2px; }
.qr-status { margin-top: 12px; font-size: 0.875rem; color: var(--text-muted); }

/* ===================== LEADERBOARD ===================== */
.rank-table {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}

.rank-row {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 11px 18px;
    border-bottom: 1px solid var(--border-color);
}

.rank-row:last-child { border-bottom: none; }
.rank-row.is-me { background: var(--pro-bg); }
.rank-row.is-detached { border-top: 2px solid var(--border-color); }

.rank-pos {
    width: 30px;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.rank-1::before { content: '🥇'; }
.rank-2::before { content: '🥈'; }
.rank-3::before { content: '🥉'; }
.rank-1, .rank-2, .rank-3 { font-size: 0; }
.rank-1::before, .rank-2::before, .rank-3::before { font-size: 1rem; }

.rank-name  { flex: 1; font-weight: 500; }
.rank-value { color: var(--text-muted); font-size: 0.875rem; }

/* ===================== BADGES ===================== */
.badge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 12px;
}

.badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 14px 10px;
    border: 1px solid var(--border-color);
    border-radius: 2px;
    background: var(--bg-color);
    opacity: 0.55;
    transition: opacity 0.2s ease, border-color 0.2s ease;
}

.badge.is-earned {
    opacity: 1;
    border-color: var(--pro-color);
    background: var(--card-bg);
}

.badge-icon { font-size: 1.5rem; filter: grayscale(1); }
.badge.is-earned .badge-icon { filter: none; }

.badge-name  { font-size: 0.75rem; text-align: center; }
.badge-value { font-size: 0.6875rem; color: var(--text-muted); }

.badge-progress {
    width: 100%;
    height: 3px;
    background: var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}

.badge-progress span {
    display: block;
    height: 100%;
    background: var(--pro-color);
}

/* ===================== ACCOUNT ===================== */
.account-rows { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }

.account-row {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    font-size: 0.875rem;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.account-row span { color: var(--text-muted); }

.switch-row {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 0.875rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .plan-grid { grid-template-columns: 1fr; }
    .banner { flex-direction: column; align-items: stretch; }
    .badge-grid { grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); }
}

/* =============================================================
   Dark theme. Follows the OS until the viewer picks one with the
   header button (stored as data-theme on <html>).
   ============================================================= */
:root[data-theme="dark"] {
    --primary-color: #b5b5ac;
    --secondary-color: #85857e;
    --success-color: #93a898;
    --danger-color: #c49e9e;
    --warning-color: #cbbb93;
    --info-color: #9aa8b6;
    --bg-color: #1b1b19;
    --card-bg: #252523;
    --text-color: #e4e4de;
    --text-muted: #9a9a93;
    --border-color: #3a3a36;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 2px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.45);
    --heat-0: #2b2b28;
    --heat-1: #3c4a40;
    --heat-2: #55685a;
    --heat-3: #7a8f7f;
    --heat-4: #a8bcad;
    --pro-color: #c9ae74;
    --pro-bg: #332d20;
    color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --primary-color: #b5b5ac;
        --secondary-color: #85857e;
        --success-color: #93a898;
        --danger-color: #c49e9e;
        --warning-color: #cbbb93;
        --info-color: #9aa8b6;
        --bg-color: #1b1b19;
        --card-bg: #252523;
        --text-color: #e4e4de;
        --text-muted: #9a9a93;
        --border-color: #3a3a36;
        --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
        --shadow-md: 0 2px 6px rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.4);
        --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.45);
        --heat-0: #2b2b28;
        --heat-1: #3c4a40;
        --heat-2: #55685a;
        --heat-3: #7a8f7f;
        --heat-4: #a8bcad;
        --pro-color: #c9ae74;
        --pro-bg: #332d20;
        color-scheme: dark;
    }
}
/* styles.css pins these to black; route them through the tokens instead */
.translation-content .translation,
.translation-content p { color: var(--text-color) !important; }
.translation-content strong { color: var(--text-muted) !important; }
.input-group input::placeholder { color: var(--text-muted); }

.btn-theme { min-width: 44px; padding-left: 10px; padding-right: 10px; }

/* ===================== SPEAK MODE ===================== */
.speak-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    margin-top: 16px;
}
.btn-mic.is-listening { animation: mic-pulse 1s ease-in-out infinite; }
@keyframes mic-pulse { 50% { opacity: 0.55; } }
@media (prefers-reduced-motion: reduce) { .btn-mic.is-listening { animation: none; } }

/* ===================== GRAMMAR ===================== */
#grammarBack { margin-bottom: 12px; }

.grammar-row {
    display: flex;
    align-items: center;
    gap: 14px;
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    border-bottom: 1px solid var(--border-color);
    padding: 12px 18px;
    font-family: inherit;
    color: var(--text-color);
    cursor: pointer;
}
.grammar-row:last-child { border-bottom: none; }
.grammar-row:hover { background: var(--bg-color); }
.grammar-row.is-done .grammar-row-num { border-color: var(--success-color); color: var(--success-color); }
.grammar-row-num {
    flex-shrink: 0;
    width: 28px; height: 28px;
    display: grid; place-items: center;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    font-size: 0.75rem;
    color: var(--text-muted);
}
.grammar-row-main { display: flex; flex-direction: column; gap: 2px; min-width: 0; flex: 1; }
.grammar-row-main strong { font-weight: 500; }
.grammar-row-main span { font-size: 0.8125rem; color: var(--text-muted); }
.grammar-row-main code, .grammar-pattern code {
    font-family: ui-monospace, 'SFMono-Regular', Consolas, monospace;
    font-size: 0.8125rem;
    color: var(--info-color);
    overflow-wrap: anywhere;
}
.grammar-row-state { color: var(--text-muted); flex-shrink: 0; }

.grammar-title { font-size: 1.5rem; font-weight: 500; margin: 8px 0 2px; }
.grammar-title-th { color: var(--text-muted); margin-bottom: 12px; }
.grammar-pattern {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 2px;
    padding: 10px 14px;
    margin-bottom: 14px;
}
.grammar-explain { line-height: 1.8; margin-bottom: 14px; }
.grammar-examples { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.grammar-examples li { display: flex; gap: 10px; align-items: flex-start; }
.grammar-examples .example-en, .grammar-examples .example-th { display: block; }
.grammar-examples .example-th, .grammar-feedback .example-th { color: var(--text-muted); font-size: 0.875rem; }

.grammar-question { font-size: 1.125rem; line-height: 1.7; }
.grammar-blank { display: inline-block; min-width: 3em; border-bottom: 2px solid var(--primary-color); color: transparent; }
.grammar-feedback { margin-top: 14px; display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
.grammar-feedback:empty { display: none; }
.grammar-score { font-size: 2rem; font-weight: 500; }

/* ===================== VERSION ===================== */
.app-version {
    position: fixed;
    right: 10px;
    bottom: calc(8px + env(safe-area-inset-bottom));
    font-size: 0.6875rem;
    color: var(--text-muted);
    opacity: 0.7;
    pointer-events: none;
    z-index: 5;
}

/* =============================================================
   Mobile layout. styles.css sets `contain: paint` on body, which makes
   body the containing block for position: fixed — the toast, the version
   label and the bottom tab bar would pin to the end of the page instead
   of the screen.
   ============================================================= */
body { contain: none; }
.tab-icon { margin-right: 6px; }
.tab-more { display: none; }
/* nine tabs on a desktop row: one line that scrolls sideways, never a second row */
.tabs { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tab { padding: 10px 12px; white-space: nowrap; flex: none; }
@media (max-width: 1000px) and (min-width: 769px) {
    .tab { padding: 10px 7px; font-size: 0.8125rem; }
    .tab-icon { margin-right: 4px; }
}

@media (max-width: 768px) {
    body { padding: 12px 12px calc(76px + env(safe-area-inset-bottom)); }

    /* header: title and actions share one compact block */
    header { margin-bottom: 14px; }
    .header-content { flex-direction: row; flex-wrap: wrap; align-items: center; gap: 8px; }
    .header-content .subtitle { display: none; }
    .header-actions { width: auto; margin-left: auto; flex-wrap: wrap; justify-content: flex-end; gap: 6px; }
    .header-actions .btn { width: auto; flex: none; padding: 8px 10px; font-size: 0.75rem; }
    .btn-theme { min-width: 36px; }

    /* tabs become an app-style bottom bar */
    .tabs {
        position: fixed;
        left: 0; right: 0; bottom: 0;
        z-index: 20;
        margin: 0;
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        gap: 0;
        background: var(--card-bg);
        border-top: 1px solid var(--border-color);
        border-bottom: none;
        padding-bottom: env(safe-area-inset-bottom);
        box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.06);
    }
    .tab {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 3px;
        min-height: 58px;
        padding: 6px 2px;
        font-size: 0.6875rem;
        border-bottom: none;
        border-top: 2px solid transparent;
    }
    .tab.is-active { border-top-color: var(--primary-color); }
    .tab-secondary { display: none; }
    .tab-more { display: flex; }
    .tab-icon { margin: 0; font-size: 1.25rem; line-height: 1; }
    .tab-label { white-space: nowrap; }

    .app-version { bottom: calc(64px + env(safe-area-inset-bottom)); right: 8px; }
    .toast { bottom: calc(84px + env(safe-area-inset-bottom)); max-width: calc(100% - 32px); text-align: center; }

    /* study: four stat tiles in one short row so the card sits near the top */
    .stats { flex-wrap: nowrap; gap: 6px; margin-bottom: 12px; }
    .stats .stat-item { flex: 1 1 0; min-width: 0; padding: 8px 4px; }
    .stats .stat-label {
        display: flex; align-items: center; justify-content: center;
        min-height: 2.5em; font-size: 0.625rem; line-height: 1.25;
    }
    .stats .stat-value { font-size: 1.25rem; }
    .goal-bar { margin: 0 0 12px; }
    .goal-bar-text { font-size: 0.75rem; }

    .filters { padding: 10px 12px; margin-bottom: 12px; }
    .filter-row { gap: 6px 8px; }
    .filter-row + .filter-row { margin-top: 8px; }
    /* label + select pairs line up in a grid instead of orphaning a label */
    .filter-row:has(select) {
        display: grid;
        grid-template-columns: auto minmax(0, 1fr) auto minmax(0, 1fr);
        align-items: center;
    }
    .filter-row .select-input { min-width: 0; }
    .chips { gap: 4px; }
    .chip { padding: 6px 10px; }

    .flashcard-container, .flashcard { min-height: 0; }
    .flashcard { padding: 22px 16px; }
    .translation-section { margin: 12px 0 0; }
    .translation-content { padding: 14px; }

    /* one-thumb grading: four across, then the rarer actions */
    .grade-row { grid-template-columns: repeat(4, 1fr); gap: 6px; }
    .btn-grade { padding: 10px 2px; font-size: 0.8125rem; }
    .grade-hint { font-size: 0.6875rem; }
    .secondary-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
    .secondary-row #hideBtn { grid-column: 1 / -1; }
    .secondary-row .btn { width: 100%; padding: 10px 8px; font-size: 0.8125rem; }

    .quiz-option { padding: 12px 14px; }
    .btn-mic { width: 100%; padding: 14px; }

    .panel { padding: 16px; margin-bottom: 16px; }
    .stats-grid { grid-template-columns: repeat(3, 1fr); }
    .grammar-row { padding: 12px 14px; }
    .grammar-title { font-size: 1.25rem; }
}

@media (max-width: 360px) {
    .tab { font-size: 0.625rem; }
    .stats .stat-label { font-size: 0.5625rem; }
}

/* ===================== PRACTICE MODES ===================== */
.practice-box { display: flex; flex-direction: column; gap: 10px; margin-top: 18px; }
.practice-prompt { font-size: 1.125rem; line-height: 1.7; }
.practice-blank { display: inline-block; min-width: 4em; border-bottom: 2px solid var(--primary-color); color: var(--primary-color); text-align: center; }
.practice-hint { font-size: 0.875rem; color: var(--text-muted); }
.practice-hint:empty { display: none; }
.practice-audio, .practice-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.practice-input { width: 100%; padding: 12px 14px; font-size: 1rem; resize: vertical; font-family: inherit; }
.practice-input[rows="1"] { resize: none; overflow: hidden; }
.banner-actions .btn { flex: 1 1 auto; width: auto; }
.practice-feedback { font-size: 0.9375rem; }
.practice-feedback.is-correct { color: var(--success-color); }
.practice-feedback.is-wrong { color: var(--danger-color); }
.practice-score { font-weight: 500; margin-bottom: 6px; }
.practice-diff { line-height: 1.9; color: var(--text-color); }
.practice-diff .is-hit { color: var(--success-color); }
.practice-diff .is-miss { color: var(--danger-color); text-decoration: underline wavy; text-underline-offset: 4px; }
.word.is-prompt { font-size: 2rem; line-height: 1.4; }

/* ===================== LEVEL BANNER / MORE ===================== */
.banner-level { border-left-color: var(--info-color); }
.banner-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.more-list { display: flex; flex-direction: column; background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 2px; }
.more-item {
    display: flex; align-items: center; gap: 14px;
    background: none; border: none; border-bottom: 1px solid var(--border-color);
    padding: 16px 18px; font-family: inherit; font-size: 1rem; color: var(--text-color);
    text-align: left; cursor: pointer;
}
.more-item:last-child { border-bottom: none; }
.more-item span { font-size: 1.25rem; }
.more-item:hover { background: var(--bg-color); }

@media (max-width: 768px) {
    .practice-actions .btn { flex: 1 1 auto; }
    .word.is-prompt { font-size: 1.5rem; }
}