/* ===== SRS STYLES — Apple + Glassmorphism v1.0 ===== */

* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --glass-blur: blur(20px);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --tone-1: var(--red, #dc2626);
    --tone-2: var(--green, #16a34a);
    --tone-3: var(--blue, #2563eb);
    --tone-4: var(--purple, #7c3aed);
    --tone-0: var(--gray, #6b7280);
}

/* ===== BODY + GRADIENT BACKGROUND ===== */

.srs-body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
    color: var(--text);
    min-height: 100vh;
    background:
        radial-gradient(ellipse at 20% 0%, rgba(var(--teal-rgb), 0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 100%, rgba(var(--blue-rgb), 0.10) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(var(--gold-rgb), 0.05) 0%, transparent 60%),
        var(--surface-bg);
    background-attachment: fixed;
}

/* ===== ANIMATIONS ===== */

@keyframes fadeSlideUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeScale {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-12px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulseGlow {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes celebratePop {
    0% { opacity: 0; transform: scale(0.5); }
    60% { transform: scale(1.05); }
    100% { opacity: 1; transform: scale(1); }
}

/* Stagger delays for children */
.anim-stagger > *:nth-child(1) { animation-delay: 0.05s; }
.anim-stagger > *:nth-child(2) { animation-delay: 0.1s; }
.anim-stagger > *:nth-child(3) { animation-delay: 0.15s; }
.anim-stagger > *:nth-child(4) { animation-delay: 0.2s; }
.anim-stagger > *:nth-child(5) { animation-delay: 0.25s; }
.anim-stagger > *:nth-child(6) { animation-delay: 0.3s; }
.anim-stagger > *:nth-child(7) { animation-delay: 0.35s; }
.anim-stagger > *:nth-child(8) { animation-delay: 0.4s; }
.anim-stagger > *:nth-child(9) { animation-delay: 0.45s; }
.anim-stagger > *:nth-child(10) { animation-delay: 0.5s; }

/* ===== NAV (glass) ===== */

.srs-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 56px;
    background: rgba(var(--nav-bg-rgb), 0.75);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.srs-nav.srs-nav-ready {
    transition: transform 0.3s ease;
}

.srs-nav-hidden {
    transform: translateY(-100%);
    pointer-events: none;
}

.srs-nav-brand {
    font-weight: 700;
    font-size: 18px;
    color: var(--gold-accent, #ffd166);
    text-decoration: none;
    letter-spacing: 0.02em;
}

.srs-nav-links {
    display: flex;
    align-items: center;
    gap: 16px;
}

.srs-nav-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

.srs-nav-links a:hover {
    color: #fff;
}

.srs-nav-links a.active {
    color: #fff;
    border-bottom: 2px solid var(--teal);
    padding-bottom: 2px;
}

/* Theme toggle */
.srs-theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.8);
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    padding: 0;
}

.srs-theme-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.srs-nav-user {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    font-weight: 600;
    color: var(--teal);
}

.srs-logout-inline {
    margin: 0;
    padding: 0;
}

.srs-logout-inline button {
    display: block;
    width: 100%;
    text-align: left;
    padding: 8px 16px;
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.15s;
    font-family: inherit;
}

.srs-logout-inline button:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.srs-nav-dropdown {
    position: relative;
}

.srs-nav-dropdown-toggle {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    padding: 0;
    transition: color 0.2s;
}

.srs-nav-dropdown-toggle:hover {
    color: #fff;
}

.srs-nav-dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    min-width: 120px;
    background: rgba(var(--nav-bg-rgb), 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-sm, 8px);
    padding: 14px 0 6px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    z-index: 200;
}

.srs-nav-dropdown:hover .srs-nav-dropdown-menu,
.srs-nav-dropdown:focus-within .srs-nav-dropdown-menu {
    display: block;
}

.srs-nav-dropdown-menu a {
    display: block;
    padding: 8px 16px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    transition: background 0.15s;
}

.srs-nav-dropdown-menu a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

/* ===== MAIN CONTAINER ===== */

.srs-main {
    max-width: 800px;
    margin: 0 auto;
    padding: 24px 16px 80px;
}

/* ===== FLASH MESSAGES ===== */

.srs-flash {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    font-size: 14px;
    font-weight: 500;
    animation: slideDown 0.4s ease-out both;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
}

.srs-flash-success { background: rgba(var(--green-rgb), 0.15); border-color: rgba(var(--green-rgb), 0.3); color: var(--flash-success); }
.srs-flash-error { background: rgba(var(--red-rgb), 0.12); border-color: rgba(var(--red-rgb), 0.3); color: var(--flash-error); }
.srs-flash-info { background: rgba(var(--blue-rgb), 0.12); border-color: rgba(var(--blue-rgb), 0.3); color: var(--flash-info); }

/* ===== BUTTONS ===== */

.srs-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: transform 0.15s ease, box-shadow 0.2s ease, opacity 0.15s;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.srs-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.srs-btn:active {
    transform: translateY(0) scale(0.97);
}

.srs-btn-primary {
    background: linear-gradient(135deg, var(--teal), var(--teal-dark));
    color: #fff;
    box-shadow: 0 2px 12px rgba(var(--teal-rgb), 0.3);
}

.srs-btn-primary:hover {
    box-shadow: 0 6px 20px rgba(var(--teal-rgb), 0.4);
}

.srs-btn-secondary {
    background: rgba(var(--gray-rgb), 0.15);
    color: var(--text);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid rgba(var(--gray-rgb), 0.2);
}

.srs-btn-secondary:hover {
    background: rgba(var(--gray-rgb), 0.25);
}

.srs-btn-full { width: 100%; }

.srs-btn-large {
    display: block;
    padding: 16px 32px;
    font-size: 17px;
    margin: 24px auto;
    text-align: center;
    max-width: 400px;
    border-radius: var(--radius-lg);
    animation: fadeSlideUp 0.5s ease-out 0.3s both;
}

/* Rating buttons */
.srs-btn-fail {
    background: linear-gradient(135deg, var(--red-light), var(--red));
    color: #fff;
    box-shadow: 0 2px 12px rgba(var(--red-rgb), 0.25);
}

.srs-btn-hard {
    background: linear-gradient(135deg, var(--gold-light), var(--gold-mid));
    color: #fff;
    box-shadow: 0 2px 12px rgba(var(--gold-mid-rgb), 0.25);
}

.srs-btn-ok {
    background: linear-gradient(135deg, var(--teal-light), var(--teal));
    color: #fff;
    box-shadow: 0 2px 12px rgba(var(--teal-rgb), 0.25);
}

.srs-btn-easy {
    background: linear-gradient(135deg, var(--green-light), var(--green-bright));
    color: #fff;
    box-shadow: 0 2px 12px rgba(var(--green-bright-rgb), 0.25);
}

/* ===== FORMS ===== */

.srs-form-group {
    margin-bottom: 16px;
}

.srs-form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--muted);
    letter-spacing: 0.02em;
}

.srs-input, .srs-select, .srs-textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 16px;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.srs-input:focus, .srs-select:focus, .srs-textarea:focus {
    outline: none;
    border-color: var(--teal);
    box-shadow: 0 0 0 3px rgba(var(--teal-rgb), 0.15);
}

.srs-textarea {
    font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
    resize: vertical;
}

.srs-form-error {
    color: var(--red);
    font-size: 13px;
    margin-top: 4px;
}

.srs-form-hint {
    color: var(--muted);
    font-size: 13px;
    margin-top: 6px;
}

/* ===== LOGIN ===== */

.srs-login-wrap {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 56px - 48px);
    padding: 24px 16px;
}

.srs-login-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 40px 32px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.1);
    animation: fadeScale 0.5s ease-out both;
}

.srs-login-title {
    text-align: center;
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 4px;
    letter-spacing: -0.01em;
}

.srs-login-subtitle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    color: var(--muted);
    font-size: 14px;
    margin-bottom: 28px;
}


/* ===== STATS GRID ===== */

.srs-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin: 20px 0;
}

.srs-stat-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 20px 16px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    animation: fadeSlideUp 0.5s ease-out both;
}

.srs-stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
}

.srs-stat-label {
    font-size: 12px;
    color: var(--muted);
    margin-top: 4px;
    font-weight: 500;
    letter-spacing: 0.02em;
}

/* ===== DASHBOARD ===== */

.srs-dashboard h1 {
    margin-bottom: 4px;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.01em;
    animation: fadeSlideUp 0.4s ease-out both;
}

.srs-dashboard-info {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.8;
    animation: fadeSlideUp 0.4s ease-out 0.1s both;
}

.srs-done-message {
    text-align: center;
    padding: 24px;
    font-size: 18px;
    color: var(--teal);
    font-weight: 600;
    margin: 24px 0;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    animation: fadeScale 0.5s ease-out both;
}

.srs-plan-done {
    text-align: center;
    padding: 16px;
    font-size: 18px;
    color: var(--green-bright);
    font-weight: 600;
    margin: 24px 0 8px;
    animation: fadeSlideUp 0.4s ease-out 0.2s both;
}

/* ===== TABLE ===== */

.srs-table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0 24px;
}

.srs-table th, .srs-table td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    font-size: 14px;
}

.srs-table th {
    font-weight: 600;
    color: var(--muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.srs-table a {
    color: var(--teal);
    text-decoration: none;
    font-weight: 500;
}

/* ===== REVIEW ===== */

.srs-review {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 16px;
}

.srs-review-header {
    width: 100%;
    max-width: 500px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    animation: fadeSlideUp 0.4s ease-out both;
}

.srs-review-progress {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--muted);
    font-weight: 500;
}

.srs-undo-form {
    display: inline-flex;
    margin: 0;
    padding: 0;
}

.srs-btn-undo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-sm);
    background: rgba(var(--gray-rgb), 0.15);
    color: var(--muted);
    cursor: pointer;
    transition: all 0.2s ease;
}

.srs-btn-undo:hover {
    background: rgba(var(--gray-rgb), 0.3);
    color: var(--text);
}

.srs-btn-undo:active {
    transform: scale(0.92);
}

.srs-card-timer {
    font-size: 12px;
    font-weight: 600;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
    min-width: 28px;
    text-align: center;
}

.srs-review-stats {
    display: flex;
    gap: 5px;
    align-items: center;
}

.srs-review-stat {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 28px;
    padding: 0 6px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 700;
    color: #fff;
}

.srs-review-stat-fail { background: linear-gradient(135deg, var(--red-light), var(--red)); }
.srs-review-stat-hard { background: linear-gradient(135deg, var(--gold-light), var(--gold-mid)); }
.srs-review-stat-ok { background: linear-gradient(135deg, var(--teal-light), var(--teal)); }
.srs-review-stat-easy { background: linear-gradient(135deg, var(--green-light), var(--green-bright)); }
.srs-review-stat-remaining { background: rgba(var(--gray-rgb), 0.3); color: var(--text); }

/* Badges */
.srs-badge-new {
    display: inline-block;
    background: linear-gradient(135deg, var(--gold-light), var(--gold-mid));
    color: var(--text);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 10px;
    font-weight: 700;
    margin-left: 8px;
    vertical-align: middle;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    animation: pulseGlow 2s ease-in-out infinite;
}

.srs-badge-tag {
    display: inline-block;
    background: rgba(var(--teal-rgb), 0.15);
    color: var(--teal);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 10px;
    font-weight: 700;
    margin-left: 8px;
    vertical-align: middle;
    letter-spacing: 0.04em;
}

.srs-badge-retry {
    display: inline-block;
    background: linear-gradient(135deg, var(--red-light), var(--red));
    color: #fff;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 10px;
    font-weight: 700;
    margin-left: 8px;
    vertical-align: middle;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    animation: pulseGlow 2s ease-in-out infinite;
}

.srs-badge-leech {
    display: inline-block;
    background: linear-gradient(135deg, var(--purple, #7c3aed), var(--purple-dark, #5b21b6));
    color: #fff;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 10px;
    font-weight: 700;
    margin-left: 8px;
    vertical-align: middle;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

/* ===== FLASHCARD — 3D FLIP ===== */

.srs-card {
    width: 100%;
    max-width: 500px;
    min-height: 320px;
    animation: fadeScale 0.5s ease-out 0.1s both;
}

.srs-card-inner {
    position: relative;
    width: 100%;
    min-height: 320px;
}

.srs-card-front,
.srs-card-back {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    min-height: 320px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 28px;
    gap: 20px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-shadow);
}

.srs-card-front {
    z-index: 2;
    transition: opacity 0.3s ease-in;
}

.srs-card-back {
    z-index: 1;
    opacity: 0;
    transition: opacity 0.3s ease-in;
}

.srs-card.flipped .srs-card-front {
    opacity: 0;
    pointer-events: none;
}

.srs-card.flipped .srs-card-back {
    opacity: 1;
    z-index: 2;
}

.srs-card-chinese {
    font-size: 56px;
    font-weight: 700;
    color: var(--cn);
    font-family: 'KaiTi', 'STKaiti', 'SimSun', serif;
    text-align: center;
    line-height: 1.3;
}

.srs-card-pinyin {
    font-size: 22px;
    font-weight: 600;
    text-align: center;
}

.srs-card-ukrainian {
    font-size: 20px;
    color: var(--text);
    text-align: center;
    font-weight: 500;
}

/* ===== RATING FORM (outside card) ===== */

.srs-rating-form {
    width: 100%;
    max-width: 500px;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.4s ease, transform 0.4s ease;
    pointer-events: none;
}

.srs-rating-form.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.srs-rating-prompt {
    text-align: center;
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 12px;
    font-weight: 500;
}

.srs-rating-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.srs-rating-buttons .srs-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 10px 8px 14px;
    font-size: 13px;
    border-radius: var(--radius-md);
}

.srs-btn-interval {
    font-size: 11px;
    opacity: 0.7;
    font-weight: 400;
}

/* ===== PINYIN TONE COLORS ===== */

.t1 { color: var(--tone-1); font-weight: 700; }
.t2 { color: var(--tone-2); font-weight: 700; }
.t3 { color: var(--tone-3); font-weight: 700; }
.t4 { color: var(--tone-4); font-weight: 700; }
.t0 { color: var(--tone-0); }

/* ===== COMPLETE ===== */

.srs-complete {
    text-align: center;
}

.srs-complete h1 {
    margin-bottom: 8px;
    color: var(--teal);
    animation: celebratePop 0.6s ease-out both;
    font-size: 26px;
}

.srs-complete-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin: 20px 0;
}

.srs-complete-stats .srs-stat-card {
    padding: 16px 12px;
}

.srs-results-list {
    text-align: left;
    margin: 24px 0;
}

.srs-results-list h2 {
    font-size: 16px;
    margin-bottom: 12px;
    font-weight: 600;
}

.srs-result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 6px;
    font-size: 15px;
    animation: fadeSlideUp 0.4s ease-out both;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
}

.srs-result-ok { background: rgba(var(--green-rgb), 0.12); border-color: rgba(var(--green-rgb), 0.2); }
.srs-result-fail { background: rgba(var(--red-rgb), 0.1); border-color: rgba(var(--red-rgb), 0.2); }
.srs-result-retry { background: rgba(var(--gold-mid-rgb), 0.12); border-color: rgba(var(--gold-mid-rgb), 0.2); }

.srs-result-word {
    font-weight: 600;
    font-family: 'KaiTi', 'STKaiti', 'SimSun', serif;
    font-size: 20px;
}

.srs-result-quality {
    font-size: 13px;
    color: var(--muted);
    font-weight: 500;
}

.srs-complete-actions {
    margin-top: 24px;
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeSlideUp 0.4s ease-out 0.3s both;
}

/* ===== ADMIN ===== */

.srs-admin h1 {
    margin-bottom: 16px;
    font-size: 22px;
    font-weight: 700;
}

.srs-admin h2 {
    margin-top: 32px;
    margin-bottom: 8px;
    font-size: 18px;
}

.srs-admin-actions {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    animation: fadeSlideUp 0.4s ease-out 0.1s both;
}

.srs-form {
    max-width: 500px;
    margin-bottom: 24px;
}

.srs-form-danger {
    margin-top: 24px;
}

.srs-table-words .srs-td-cn {
    font-family: 'KaiTi', 'STKaiti', 'SimSun', serif;
    font-size: 18px;
    font-weight: 700;
    color: var(--cn);
}

.srs-row-new td { opacity: 0.5; }
.srs-row-learning td:nth-child(4) { color: var(--gold-mid); font-weight: 600; }
.srs-row-due td:nth-child(4) { color: var(--red); font-weight: 600; }
.srs-row-learned td:nth-child(4) { color: var(--green-bright); font-weight: 600; }

.srs-admin h3 {
    margin-top: 20px;
    margin-bottom: 8px;
    font-size: 15px;
    color: var(--teal);
}

.srs-link-back {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 16px;
    color: var(--teal);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: opacity 0.15s;
}

.srs-link-back:hover { opacity: 0.7; }

.srs-recent {
    margin-top: 32px;
    animation: fadeSlideUp 0.5s ease-out 0.3s both;
}

.srs-recent h2 {
    font-size: 18px;
    margin-bottom: 8px;
}

/* ===== RESPONSIVE ===== */

/* Phone: bottom tab bar */
@media (max-width: 480px) {
    .srs-nav {
        position: fixed;
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        height: auto;
        padding: 0;
        border-bottom: none;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
    }

    .srs-nav-hidden {
        transform: translateY(100%);
    }

    .srs-nav-brand {
        display: none;
    }

    .srs-nav-links {
        width: 100%;
        justify-content: space-around;
        gap: 0;
        padding: 6px 0;
        padding-bottom: max(6px, env(safe-area-inset-bottom, 6px));
    }

    .srs-nav-links a,
    .srs-nav-dropdown-toggle {
        flex-direction: column;
        align-items: center;
        gap: 1px;
        font-size: 10px;
        min-width: 0;
    }

    .srs-theme-toggle {
        width: auto;
        height: auto;
        background: none;
        border-radius: 0;
        padding: 4px 0;
    }

    .srs-nav-links a.active {
        border-bottom: none;
        padding-bottom: 0;
        color: var(--teal);
    }

    /* Dropdown menus open upward */
    .srs-nav-dropdown-menu {
        bottom: calc(100% + 8px);
        top: auto;
        padding: 6px 0;
    }

    /* Right-align user dropdown to prevent off-screen */
    .srs-nav-user-dropdown .srs-nav-dropdown-menu {
        left: auto;
        right: 0;
        transform: none;
    }

    /* Hide long user name, keep icon only */
    .srs-nav-user-dropdown .srs-nav-user span:not(.material-symbols-rounded) {
        display: none;
    }

    .srs-main {
        padding: 16px 12px 80px;
    }

    .srs-stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .srs-stat-card {
        padding: 14px 10px;
    }

    .srs-stat-value {
        font-size: 26px;
    }

    .srs-stat-label {
        font-size: 11px;
    }

    .srs-review {
        padding-top: 0;
    }

    .srs-card {
        min-height: 260px;
    }

    .srs-card-inner {
        min-height: 260px;
    }

    .srs-card-front,
    .srs-card-back {
        min-height: 260px;
        padding: 28px 20px;
    }

    .srs-card-chinese {
        font-size: 44px;
    }

    .srs-card-pinyin {
        font-size: 18px;
    }

    .srs-card-ukrainian {
        font-size: 17px;
    }

    .srs-rating-buttons {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .srs-rating-buttons .srs-btn {
        padding: 16px 8px;
        font-size: 14px;
        min-height: 48px;
    }

    .srs-review-header {
        flex-direction: column;
        gap: 10px;
        align-items: center;
    }

    .srs-login-card {
        padding: 28px 20px;
        border-radius: var(--radius-lg);
    }

    .srs-login-title {
        font-size: 22px;
    }

    .srs-complete-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }

    .srs-complete-stats .srs-stat-card {
        padding: 12px 8px;
    }

    .srs-complete-stats .srs-stat-value {
        font-size: 22px;
    }

    .srs-btn-large {
        font-size: 16px;
        padding: 14px 24px;
    }
}

/* Tablet */
@media (min-width: 481px) and (max-width: 768px) {
    .srs-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .srs-card-chinese {
        font-size: 50px;
    }
}

/* Rating safe area for phones with notch */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    .srs-rating-form {
        padding-bottom: env(safe-area-inset-bottom);
    }
}

/* ===== ERROR PAGES ===== */

.srs-error-page {
    text-align: center;
    padding: 60px 20px;
    animation: fadeSlideUp 0.5s ease-out both;
}

.srs-error-code {
    font-size: 96px;
    font-weight: 800;
    color: var(--muted);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: 8px;
}

.srs-error-page h1 {
    font-size: 24px;
    color: var(--text);
    margin-bottom: 8px;
}

.srs-error-page p {
    color: var(--muted);
    margin-bottom: 24px;
}

/* ===== MATERIAL ICONS ===== */

/* Base: inline-flex centering for all icon+text pairs */
.material-symbols-rounded {
    display: inline-flex;
    align-items: center;
    vertical-align: middle;
    font-size: 20px;
    line-height: 1;
    flex-shrink: 0;
}

/* --- Stat card icon --- */
.srs-stat-icon {
    display: block;
    font-size: 28px;
    margin: 0 auto 6px;
}

/* Stat card color coding by position */
.srs-stat-card:nth-child(1) .srs-stat-icon { color: var(--teal); }
.srs-stat-card:nth-child(1) .srs-stat-value { color: var(--teal); }

.srs-stat-card:nth-child(2) .srs-stat-icon { color: var(--blue); }
.srs-stat-card:nth-child(2) .srs-stat-value { color: var(--blue); }

.srs-stat-card:nth-child(3) .srs-stat-icon { color: var(--gold); }
.srs-stat-card:nth-child(3) .srs-stat-value { color: var(--gold); }

.srs-stat-card:nth-child(4) .srs-stat-icon { color: var(--green); }
.srs-stat-card:nth-child(4) .srs-stat-value { color: var(--green); }

/* --- Flash message icon --- */
.srs-flash-icon {
    font-size: 18px;
    flex-shrink: 0;
}

/* --- Nav icons --- */
.srs-nav-links a,
.srs-nav-dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.srs-nav-links .material-symbols-rounded { font-size: 18px; }
.srs-nav-user .material-symbols-rounded { font-size: 16px; }
.srs-logout-inline .material-symbols-rounded { font-size: 18px; vertical-align: -3px; margin-right: 2px; }
.srs-theme-toggle .material-symbols-rounded { font-size: 18px; }

/* --- Button icons --- */
.srs-btn .material-symbols-rounded {
    font-size: 18px;
}

/* Rating buttons: stacked layout, icon above text */
.srs-rating-buttons .srs-btn .material-symbols-rounded {
    font-size: 22px;
}

/* --- Badges: inline-flex with gap --- */
.srs-badge-tag,
.srs-badge-retry,
.srs-badge-new,
.srs-badge-leech {
    display: inline-flex;
    align-items: center;
    gap: 3px;
}

.srs-badge-tag .material-symbols-rounded,
.srs-badge-retry .material-symbols-rounded,
.srs-badge-new .material-symbols-rounded,
.srs-badge-leech .material-symbols-rounded {
    font-size: 12px;
}

/* --- Back link icon --- */
.srs-link-back .material-symbols-rounded {
    font-size: 16px;
}

/* --- Admin headings: flex alignment --- */
.srs-admin h1,
.srs-admin h2,
.srs-admin h3 {
    display: flex;
    align-items: center;
    gap: 6px;
}

.srs-admin h1 .material-symbols-rounded {
    font-size: 24px;
    color: var(--teal);
}

.srs-admin h2 .material-symbols-rounded {
    font-size: 20px;
    opacity: 0.6;
}

.srs-admin h3 .material-symbols-rounded {
    font-size: 18px;
}

/* --- Table edit icon --- */
.srs-table a {
    display: inline-flex;
    align-items: center;
    gap: 3px;
}

.srs-table .material-symbols-rounded {
    font-size: 16px;
}

/* --- Login page icon --- */
.srs-login-icon {
    display: block;
    font-size: 36px;
    margin: 0 auto 8px;
    color: var(--teal);
}

.srs-login-subtitle .material-symbols-rounded {
    font-size: 16px;
}

/* --- Error page: heading flex --- */
.srs-error-page h1 {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.srs-error-page h1 .material-symbols-rounded {
    font-size: 28px;
}

/* --- Complete page --- */
.srs-complete h1 {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.srs-complete h1 .material-symbols-rounded {
    font-size: 28px;
}

/* --- Dashboard messages --- */
.srs-done-message,
.srs-plan-done {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.srs-done-message .material-symbols-rounded,
.srs-plan-done .material-symbols-rounded {
    font-size: 22px;
}

/* --- Undo button icon --- */
.srs-btn-undo .material-symbols-rounded {
    font-size: 20px;
}

/* --- Dashboard info link icons --- */
.srs-dashboard-info a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.srs-dashboard-info .material-symbols-rounded {
    font-size: 16px;
}

/* --- Mobile adjustments --- */
@media (max-width: 480px) {
    .srs-nav-links .material-symbols-rounded {
        font-size: 22px;
    }

    .srs-stat-icon {
        font-size: 22px;
    }
}

/* ===== DARK MODE OVERRIDES ===== */

[data-theme="dark"] .srs-input,
[data-theme="dark"] .srs-select,
[data-theme="dark"] .srs-textarea {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text);
}

[data-theme="dark"] .srs-table th,
[data-theme="dark"] .srs-table td {
    border-bottom-color: rgba(255, 255, 255, 0.06);
}

[data-theme="dark"] .srs-badge-new {
    color: var(--bg);
}

/* ===== FOCUS INDICATORS ===== */

.srs-btn:focus-visible,
.srs-nav-links a:focus-visible,
.srs-logout-inline button:focus-visible,
.srs-nav-dropdown-toggle:focus-visible,
.srs-theme-toggle:focus-visible,
.srs-select:focus-visible,
.srs-input:focus-visible,
.srs-btn-undo:focus-visible {
    outline: 2px solid var(--teal);
    outline-offset: 2px;
}