/* ===== CSS VARIABLES ===== */
:root {
    --primary: #7A1A1A;
    --primary-dark: #4A0A0A;
    --gold: #D4A017;
    --gold-light: #F5D060;
    --success: #2E7D32;
    --danger: #C62828;
    --white: #FFFFFF;
    --bg: #F8F4EE;
    --text: #2D1B0E;
    --text-secondary: #6B5A4A;
    --text-muted: #9B8A7A;
    --border: #E8E0D8;
    --shadow: 0 8px 32px rgba(74, 10, 10, 0.10);
    --shadow-lg: 0 16px 56px rgba(74, 10, 10, 0.16);
    --radius: 20px;
    --radius-sm: 12px;
    --radius-full: 9999px;
    --font-primary: 'Inter', sans-serif;
    --font-tirhuta: 'Mithilauni', 'Noto Sans Tirhuta', 'Noto Sans Devanagari', serif;
    --max-width: 1200px;
    --transition: 0.3s ease;
}

/* ===== DARK THEME ===== */
[data-theme="dark"] {
    --white: #1A1A1A;
    --bg: #121212;
    --text: #F0EDE8;
    --text-secondary: #B5A898;
    --text-muted: #7A6A5A;
    --border: #333333;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 16px 56px rgba(0, 0, 0, 0.6);
}

/* ===== RESET ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background 0.3s, color 0.3s;
}

.tirhuta {
    font-family: var(--font-tirhuta);
    display: inline-block;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 16px;
    width: 100%;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border: none;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-primary);
    text-decoration: none;
    touch-action: manipulation;
}

.btn:active {
    transform: scale(0.96);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 4px 16px rgba(122, 26, 26, 0.25);
}

.btn-primary:hover {
    box-shadow: 0 8px 32px rgba(122, 26, 26, 0.35);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--white);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--gold);
    transform: translateY(-2px);
}

.btn-gold {
    background: linear-gradient(135deg, #C9920E, var(--gold));
    color: #fff;
    box-shadow: 0 4px 16px rgba(212, 160, 23, 0.25);
}

.btn-gold:hover {
    box-shadow: 0 8px 32px rgba(212, 160, 23, 0.35);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 6px 16px;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 1.05rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ===== HEADER ===== */
header {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    padding: 10px 16px;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(74, 10, 10, 0.3);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.logo {
    color: #fff;
    font-size: 1.1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.logo-icon {
    width: 34px;
    height: 34px;
    background: var(--gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    color: var(--primary-dark);
    font-family: var(--font-tirhuta);
}

.logo span {
    color: var(--gold-light);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.theme-btn {
    background: rgba(255, 255, 255, 0.15);
    border: none;
    color: #fff;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 0.85rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-btn:hover {
    background: rgba(255, 255, 255, 0.25);
}

.auth-btn {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: #fff;
    padding: 6px 16px;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-primary);
    transition: var(--transition);
}

.auth-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.user-menu {
    position: relative;
}

.user-btn {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: #fff;
    padding: 6px 16px;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-primary);
    transition: var(--transition);
}

.user-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.user-btn .avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--gold);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-dark);
    font-weight: 700;
    font-size: 0.6rem;
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    min-width: 200px;
    padding: 6px 0;
    display: none;
    margin-top: 6px;
    z-index: 100;
}

.user-dropdown.show {
    display: block;
    animation: fadeSlide 0.3s ease;
}

.user-dropdown a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    color: var(--text);
    text-decoration: none;
    font-size: 0.8rem;
    transition: var(--transition);
    cursor: pointer;
}

.user-dropdown a:hover {
    background: var(--bg);
}

.user-dropdown .divider {
    height: 1px;
    background: var(--border);
    margin: 4px 12px;
}

/* ===== NAV TABS ===== */
.nav-tabs {
    background: var(--white);
    padding: 6px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    gap: 4px;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    position: sticky;
    top: 60px;
    z-index: 99;
}

.nav-tabs::-webkit-scrollbar {
    display: none;
}

.nav-tab {
    padding: 6px 18px;
    border: none;
    background: transparent;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-primary);
    color: var(--text-secondary);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-tab i {
    font-size: 0.85rem;
}

.nav-tab.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 4px 16px rgba(122, 26, 26, 0.2);
}

.nav-tab.active i {
    color: var(--gold-light);
}

.nav-tab .badge {
    background: var(--gold);
    color: #fff;
    font-size: 0.5rem;
    padding: 0 6px;
    border-radius: var(--radius-full);
    font-weight: 700;
    margin-left: 4px;
}

.nav-tab:hover:not(.active) {
    background: var(--bg);
}

/* ===== PAGES ===== */
.page {
    display: none;
    padding: 20px 0 60px;
    animation: fadeSlide 0.4s ease;
}

.page.active {
    display: block;
}

@keyframes fadeSlide {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== HERO ===== */
.hero {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    border-radius: var(--radius);
    padding: 40px 30px;
    color: #fff;
    margin-bottom: 24px;
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: '𑒀';
    position: absolute;
    right: -20px;
    top: -20px;
    font-size: 15rem;
    font-family: var(--font-tirhuta);
    opacity: 0.05;
    pointer-events: none;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 8px;
}

.hero h1 .highlight {
    color: var(--gold-light);
}

.hero p {
    font-size: 1.05rem;
    opacity: 0.85;
    max-width: 600px;
    margin-bottom: 16px;
    line-height: 1.7;
}

.hero-stats {
    display: flex;
    gap: 32px;
    margin-top: 16px;
    flex-wrap: wrap;
}

.hero-stats .stat {
    text-align: center;
}

.hero-stats .stat .number {
    font-size: 2rem;
    font-weight: 800;
    display: block;
    color: var(--gold-light);
}

.hero-stats .stat .label {
    font-size: 0.8rem;
    opacity: 0.7;
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.hero-actions .btn {
    background: var(--gold);
    color: var(--primary-dark);
}

.hero-actions .btn:hover {
    background: var(--gold-light);
}

.hero-actions .btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.2);
}

.hero-actions .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* ===== CARDS ===== */
.card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.card-title i {
    color: var(--gold);
}

/* ===== DASHBOARD GRID ===== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.stat-card {
    background: var(--white);
    border-radius: var(--radius-sm);
    padding: 20px;
    border: 1px solid var(--border);
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.stat-card .icon {
    font-size: 2rem;
    color: var(--gold);
    margin-bottom: 8px;
}

.stat-card .number {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.2;
}

.stat-card .label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ===== COURSE GRID ===== */
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.course-card {
    background: var(--white);
    border-radius: var(--radius-sm);
    padding: 20px;
    border: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: var(--gold);
}

.course-card .course-icon {
    font-size: 2.2rem;
    color: var(--gold);
    margin-bottom: 8px;
}

.course-card .course-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
}

.course-card .course-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

.course-card .course-progress {
    margin-top: 12px;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--border);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar .fill {
    height: 100%;
    background: linear-gradient(90deg, var(--gold), var(--gold-light));
    border-radius: var(--radius-full);
    transition: width 0.8s ease;
    width: 0%;
}

.progress-text {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 4px;
    text-align: right;
}

/* ===== PRACTICE ===== */
.practice-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    max-width: 700px;
    margin: 0 auto;
}

.practice-header {
    background: linear-gradient(135deg, var(--primary), #6B1515);
    padding: 24px 20px 18px;
    text-align: center;
    color: #fff;
}

.practice-header .char-display {
    font-family: var(--font-tirhuta);
    font-size: 4.5rem;
    font-weight: 700;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    line-height: 1.2;
}

.practice-header .char-name {
    font-size: 1.1rem;
    font-weight: 600;
    opacity: 0.9;
    margin-top: 2px;
}

.practice-header .char-counter {
    font-size: 0.8rem;
    opacity: 0.6;
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 16px;
    border-radius: var(--radius-full);
    display: inline-block;
    margin-top: 4px;
}

.practice-body {
    padding: 20px 24px;
}

.char-info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 14px;
}

.char-info-item {
    background: var(--bg);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--gold);
    text-align: center;
}

.char-info-item .label {
    font-size: 0.5rem;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 600;
}

.char-info-item .value {
    font-size: 0.8rem;
    font-weight: 600;
    margin-top: 2px;
    color: var(--text);
    font-family: var(--font-tirhuta);
}

.stroke-guide {
    display: flex;
    gap: 6px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.stroke-step {
    padding: 4px 12px;
    background: var(--bg);
    border-radius: var(--radius-full);
    font-size: 0.6rem;
    border: 1.5px solid var(--border);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition);
}

.stroke-step.active {
    background: var(--gold);
    color: #fff;
    border-color: var(--gold);
    box-shadow: 0 4px 16px rgba(212, 160, 23, 0.2);
}

.canvas-wrapper {
    display: flex;
    justify-content: center;
}

.canvas-container {
    position: relative;
    width: 100%;
    max-width: 400px;
    aspect-ratio: 1 / 1;
    background: #fff;
    border-radius: var(--radius-sm);
    border: 3px solid var(--border);
    touch-action: none;
    margin: 0 auto;
}

.canvas-container canvas {
    width: 100% !important;
    height: 100% !important;
    display: block;
    border-radius: calc(var(--radius-sm) - 2px);
    touch-action: none;
    cursor: crosshair;
    background: #fff;
}

.canvas-hint {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.06);
    backdrop-filter: blur(4px);
    padding: 4px 14px;
    border-radius: var(--radius-full);
    font-size: 0.6rem;
    color: var(--text-muted);
    pointer-events: none;
    white-space: nowrap;
    font-family: var(--font-primary);
}

.practice-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-top: 14px;
}

.practice-toolbar .btn {
    padding: 6px 16px;
    font-size: 0.75rem;
}

.practice-status {
    text-align: center;
    margin-top: 10px;
}

.practice-status .status {
    display: inline-block;
    padding: 4px 18px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    background: var(--bg);
    color: var(--text-secondary);
}

.practice-status .status.success {
    background: #e8f5e9;
    color: #2e7d32;
}

/* ===== PROGRESS ===== */
.char-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(42px, 1fr));
    gap: 4px;
    margin-top: 12px;
}

.char-grid-item {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-tirhuta);
    font-size: 1.1rem;
    background: var(--bg);
    border-radius: 8px;
    border: 2px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.char-grid-item:hover {
    transform: scale(1.05);
    border-color: var(--gold);
}

.char-grid-item.done {
    background: #e8f5e9;
    border-color: #a5d6a7;
    color: #2e7d32;
}

.char-grid-item.done::after {
    content: "✓";
    position: absolute;
    top: -4px;
    right: -4px;
    font-size: 0.4rem;
    background: #2e7d32;
    color: #fff;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.char-grid-item.current {
    border-color: var(--gold);
    background: #fff8e1;
    box-shadow: 0 0 0 2px rgba(212, 160, 23, 0.2);
}

/* ===== EXAM ===== */
.exam-question {
    font-size: 0.95rem;
    padding: 14px 16px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--gold);
    margin-bottom: 14px;
    text-align: center;
    word-wrap: break-word;
}

.exam-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    justify-items: center;
}

.exam-options button {
    padding: 12px 8px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--white);
    font-family: var(--font-tirhuta);
    font-size: 1.4rem;
    cursor: pointer;
    transition: var(--transition);
    min-height: 50px;
    touch-action: manipulation;
    width: 100%;
    max-width: 180px;
    text-align: center;
    word-wrap: break-word;
}

.exam-options button:hover:not(:disabled) {
    border-color: var(--gold);
    background: var(--bg);
    transform: translateY(-2px);
}

.exam-options button.correct {
    border-color: var(--success);
    background: #e8f5e9;
}

.exam-options button.wrong {
    border-color: var(--danger);
    background: #ffebee;
}

.exam-options button:disabled {
    cursor: default;
    opacity: 0.6;
}

.exam-feedback {
    margin-top: 10px;
    min-height: 24px;
    font-weight: 600;
    font-size: 0.85rem;
    text-align: center;
}

.exam-result {
    margin-top: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: 600;
    display: none;
    font-size: 0.9rem;
}

.exam-result.show {
    display: block;
    animation: fadeSlide 0.4s ease;
}

.exam-result.pass {
    background: #e8f5e9;
    color: var(--success);
    border: 2px solid var(--success);
}

.exam-result.fail {
    background: #ffebee;
    color: var(--danger);
    border: 2px solid var(--danger);
}

/* ===== CERTIFICATE ===== */
.certificate-preview {
    border: 4px double var(--gold);
    border-radius: var(--radius-sm);
    padding: 28px 20px;
    text-align: center;
    background: linear-gradient(135deg, #fffdf7, #fdf5e6);
    max-width: 500px;
    margin: 0 auto;
}

.certificate-preview .cert-heading {
    font-family: var(--font-tirhuta);
    color: var(--primary);
    font-size: 1.6rem;
    font-weight: 700;
}

.certificate-preview .cert-sub {
    color: var(--gold);
    font-size: 0.9rem;
    letter-spacing: 4px;
}

.certificate-preview .cert-name {
    font-size: 1.6rem;
    font-weight: 700;
    margin: 12px 0 6px;
    border-bottom: 2px dashed var(--gold);
    padding-bottom: 8px;
    color: var(--text);
}

.certificate-preview .cert-detail {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: 4px 0;
}

.certificate-preview .cert-stamp {
    font-size: 2rem;
    color: var(--gold);
    opacity: 0.3;
    margin-top: 10px;
    letter-spacing: 8px;
}

/* ===== ADMIN ===== */
.admin-table-wrap {
    overflow-x: auto;
    margin-top: 12px;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
    min-width: 600px;
}

.admin-table th {
    background: var(--primary);
    color: #fff;
    padding: 10px 12px;
    text-align: left;
    font-weight: 600;
    position: sticky;
    top: 0;
}

.admin-table td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.admin-table tr:hover td {
    background: var(--bg);
}

/* ===== AUTH MODAL ===== */
.auth-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 16px;
    backdrop-filter: blur(4px);
}

.auth-modal.show {
    display: flex;
    animation: fadeSlide 0.3s ease;
}

.auth-modal .auth-box {
    background: var(--white);
    border-radius: var(--radius);
    padding: 32px 28px;
    max-width: 420px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.auth-modal .auth-box h2 {
    text-align: center;
    color: var(--primary);
    font-size: 1.4rem;
    margin-bottom: 4px;
    font-family: var(--font-tirhuta);
}

.auth-modal .auth-box .subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 20px;
}

.auth-modal .form-group {
    margin-bottom: 14px;
}

.auth-modal .form-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.auth-modal .form-group input {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-family: var(--font-primary);
    transition: var(--transition);
    background: var(--bg);
    color: var(--text);
}

.auth-modal .form-group input:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 4px rgba(212, 160, 23, 0.1);
}

.auth-modal .form-error {
    color: var(--danger);
    font-size: 0.8rem;
    text-align: center;
    min-height: 22px;
    margin-top: 4px;
}

.auth-modal .form-success {
    color: var(--success);
    font-size: 0.8rem;
    text-align: center;
    min-height: 22px;
    margin-top: 4px;
}

.auth-modal .auth-switch {
    text-align: center;
    margin-top: 14px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.auth-modal .auth-switch span {
    color: var(--primary);
    font-weight: 600;
    cursor: pointer;
    text-decoration: underline;
}

.auth-modal .auth-switch span:hover {
    color: var(--gold);
}

.auth-modal .close-modal {
    float: right;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
    background: none;
    border: none;
    padding: 0 4px;
}

/* ===== TOAST ===== */
.toast-container {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 99999;
    max-width: 420px;
    width: 90%;
    pointer-events: none;
}

.toast {
    background: var(--white);
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideUp 0.4s ease;
    pointer-events: auto;
    font-size: 0.8rem;
}

.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.warning { border-left: 4px solid #F57C00; }
.toast.info { border-left: 4px solid #1565C0; }

.toast .icon { font-size: 1.1rem; }
.toast .message { flex: 1; }
.toast .close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 1rem;
    padding: 0 4px;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ===== FOOTER ===== */
.footer {
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 0.75rem;
    border-top: 1px solid var(--border);
    margin-top: 20px;
}

.footer i {
    color: var(--gold);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .hero h1 { font-size: 1.8rem; }
    .hero p { font-size: 0.9rem; }
    .hero-stats .stat .number { font-size: 1.5rem; }
    .practice-header .char-display { font-size: 3.5rem; }
    .practice-body { padding: 16px; }
    .char-info-grid { grid-template-columns: 1fr 1fr; }
    .dashboard-grid { grid-template-columns: 1fr 1fr; }
    .course-grid { grid-template-columns: 1fr 1fr; }
    .exam-options { grid-template-columns: 1fr 1fr; }
    .exam-options button { max-width: 100%; }
    .nav-tabs { top: 54px; padding: 4px 12px; }
    .nav-tab { padding: 4px 12px; font-size: 0.65rem; }
    .nav-tab span { display: none; }
    .nav-tab i { font-size: 1rem; }
    .char-grid { grid-template-columns: repeat(auto-fill, minmax(34px, 1fr)); }
}

@media (max-width: 480px) {
    .hero { padding: 24px 18px; }
    .hero h1 { font-size: 1.4rem; }
    .hero-stats { gap: 16px; }
    .hero-stats .stat .number { font-size: 1.2rem; }
    .practice-header .char-display { font-size: 2.8rem; }
    .practice-body { padding: 12px; }
    .char-info-grid { grid-template-columns: 1fr; }
    .dashboard-grid { grid-template-columns: 1fr; }
    .course-grid { grid-template-columns: 1fr; }
    .exam-options { grid-template-columns: 1fr; }
    .canvas-container { max-width: 280px; }
    .char-grid { grid-template-columns: repeat(auto-fill, minmax(30px, 1fr)); }
    .char-grid-item { font-size: 0.7rem; }
}

/* ===== DARK THEME OVERRIDES ===== */
[data-theme="dark"] .canvas-container canvas { background: #1A1A1A; }
[data-theme="dark"] .canvas-container { border-color: #444; }
[data-theme="dark"] .canvas-hint { background: rgba(255, 255, 255, 0.08); color: #aaa; }
[data-theme="dark"] .user-dropdown { background: #1A1A1A; border-color: #333; }
[data-theme="dark"] .user-dropdown a:hover { background: #252525; }
[data-theme="dark"] .auth-modal .auth-box { background: #1A1A1A; border-color: #333; }
[data-theme="dark"] .auth-modal .form-group input { background: #1E1E1E; color: #F0EDE8; border-color: #444; }
[data-theme="dark"] .admin-table tr:hover td { background: #1E1E1E; }
[data-theme="dark"] .course-card, [data-theme="dark"] .stat-card { border-color: #333; }
[data-theme="dark"] .toast { background: #1A1A1A; border-color: #333; color: #F0EDE8; }
[data-theme="dark"] .certificate-preview { background: linear-gradient(135deg, #1A1A1A, #1E1E1E); border-color: var(--gold); }
[data-theme="dark"] .exam-options button { background: #1A1A1A; border-color: #333; }
[data-theme="dark"] .exam-options button.correct { background: #1A3A1A; border-color: var(--success); }
[data-theme="dark"] .exam-options button.wrong { background: #3A1A1A; border-color: var(--danger); }
[data-theme="dark"] .char-grid-item { background: #1E1E1E; border-color: #333; }
[data-theme="dark"] .char-grid-item.done { background: #1A3A1A; border-color: var(--success); }
[data-theme="dark"] .char-grid-item.current { background: #2A2418; border-color: var(--gold); }
[data-theme="dark"] .stroke-step { background: #1E1E1E; border-color: #333; color: #B5A898; }
[data-theme="dark"] .stroke-step.active { background: var(--gold); color: #fff; border-color: var(--gold); }
[data-theme="dark"] .nav-tabs { background: #1A1A1A; border-color: #333; }
[data-theme="dark"] .practice-status .status { background: #1E1E1E; color: #B5A898; }
[data-theme="dark"] .practice-status .status.success { background: #1A3A1A; color: #4CAF50; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--gold); border-radius: 10px; }

/* ===== ACCESSIBILITY ===== */
:focus-visible {
    outline: 2px solid var(--gold);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}