/* ============================================
   📋 EXAMINATION SYSTEM — SHARP EDITORIAL THEME
   ============================================ */

/* ===== ROOT VARIABLES ===== */
:root {
    --ink: #0f1117;
    --ink-soft: #3a3d4a;
    --ink-muted: #7a7e8e;
    --paper: #fafaf8;
    --paper-warm: #f4f3ef;
    --paper-mid: #e8e7e2;
    --rule: #dddcd8;
    --accent-amber: #e8a020;
    --accent-amber-light: #fef3d7;
    --accent-amber-dark: #a06010;
    --accent-teal: #1a7a6e;
    --accent-teal-light: #d2f0ec;
    --accent-teal-dark: #0f4e46;
    --accent-rose: #c0364a;
    --accent-rose-light: #fce8eb;
    --accent-rose-dark: #7d1a28;
    --accent-slate: #3d4f6e;
    --accent-slate-light: #e4e8f0;
    --accent-slate-dark: #1e2840;
    --accent-lime: #4e7a1e;
    --accent-lime-light: #e6f0d4;
    --accent-lime-dark: #2a4410;
    --font-display: 'Playfair Display', 'Georgia', serif;
    --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;
    --font-mono: 'DM Mono', 'Courier New', monospace;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 3px rgba(15, 17, 23, 0.06), 0 1px 2px rgba(15, 17, 23, 0.04);
    --shadow-md: 0 4px 12px rgba(15, 17, 23, 0.08), 0 2px 4px rgba(15, 17, 23, 0.05);
    --shadow-lg: 0 12px 32px rgba(15, 17, 23, 0.10), 0 4px 8px rgba(15, 17, 23, 0.06);
    --shadow-xl: 0 24px 48px rgba(15, 17, 23, 0.12);
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-mid: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== GOOGLE FONTS IMPORT ===== */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@600;700;800&family=DM+Sans:wght@300;400;500;600&family=DM+Mono:wght@400;500&display=swap');

/* ===== GLOBAL BASE ===== */
body, .mud-layout {
    background-color: var(--paper) !important;
    color: var(--ink) !important;
    font-family: var(--font-body) !important;
}

/* ===== ANIMATIONS ===== */
@keyframes enterUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes enterLeft {
    from {
        opacity: 0;
        transform: translateX(-16px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes enterScale {
    from {
        opacity: 0;
        transform: scale(0.96);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes tickDown {
    0% {
        transform: scale(1);
    }

    40% {
        transform: scale(1.08);
    }

    100% {
        transform: scale(1);
    }
}

@keyframes shimmerSweep {
    0% {
        background-position: -300px 0;
    }

    100% {
        background-position: 300px 0;
    }
}

.animate-enter-up {
    animation: enterUp 0.5s ease-out both;
}

.animate-enter-left {
    animation: enterLeft 0.5s ease-out both;
}

.animate-enter-scale {
    animation: enterScale 0.45s ease-out both;
}

.delay-1 {
    animation-delay: 60ms;
    opacity: 0;
}

.delay-2 {
    animation-delay: 120ms;
    opacity: 0;
}

.delay-3 {
    animation-delay: 180ms;
    opacity: 0;
}

.delay-4 {
    animation-delay: 240ms;
    opacity: 0;
}

.delay-5 {
    animation-delay: 300ms;
    opacity: 0;
}

.delay-6 {
    animation-delay: 360ms;
    opacity: 0;
}

/* ===== APP BAR ===== */
.mud-appbar {
    background: var(--ink) !important;
    box-shadow: none !important;
    border-bottom: 2px solid var(--accent-amber) !important;
}

    .mud-appbar .mud-typography {
        font-family: var(--font-display) !important;
        font-weight: 700 !important;
        letter-spacing: 0.5px !important;
        font-size: 1.25rem !important;
    }

/* ===== DRAWER / SIDEBAR ===== */
.mud-drawer {
    background: var(--paper-warm) !important;
    border-right: 1px solid var(--rule) !important;
}

.mud-nav-link {
    border-radius: var(--radius-md) !important;
    margin: 2px 10px !important;
    font-family: var(--font-body) !important;
    font-size: 0.9rem !important;
    font-weight: 500 !important;
    color: var(--ink-soft) !important;
    transition: all var(--transition-fast) !important;
    border-left: 3px solid transparent !important;
}

    .mud-nav-link:hover {
        background: var(--paper-mid) !important;
        color: var(--ink) !important;
        border-left-color: var(--rule) !important;
        transform: none !important;
    }

    .mud-nav-link.active {
        background: var(--accent-amber-light) !important;
        color: var(--accent-amber-dark) !important;
        border-left-color: var(--accent-amber) !important;
        font-weight: 600 !important;
    }

.mud-navgroup-title {
    font-family: var(--font-mono) !important;
    font-size: 0.7rem !important;
    font-weight: 500 !important;
    text-transform: uppercase !important;
    letter-spacing: 2px !important;
    color: var(--ink-muted) !important;
    padding-left: 14px !important;
    margin-top: 16px !important;
}

/* ===== CARDS ===== */
.mud-card {
    background: #fff !important;
    border: 1px solid var(--rule) !important;
    border-radius: var(--radius-lg) !important;
    box-shadow: var(--shadow-sm) !important;
    transition: box-shadow var(--transition-mid), transform var(--transition-mid) !important;
}

    .mud-card:hover {
        box-shadow: var(--shadow-lg) !important;
        transform: translateY(-4px) !important;
    }

/* ===== STAT CARDS (Dashboard) ===== */
.stat-card {
    position: relative;
    border-radius: var(--radius-lg) !important;
    padding: 24px !important;
    border: 1px solid var(--rule) !important;
    background: #fff !important;
    overflow: hidden;
    transition: all var(--transition-mid);
    cursor: pointer;
}

    .stat-card::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: 3px;
        background: var(--card-accent, var(--rule));
        transform: scaleX(0);
        transform-origin: left;
        transition: transform var(--transition-mid);
    }

    .stat-card:hover::after {
        transform: scaleX(1);
    }

    .stat-card:hover {
        box-shadow: var(--shadow-lg) !important;
        transform: translateY(-5px);
    }

.stat-card-primary {
    --card-accent: var(--accent-amber);
}

.stat-card-secondary {
    --card-accent: var(--accent-rose);
}

.stat-card-success {
    --card-accent: var(--accent-teal);
}

.stat-card-warning {
    --card-accent: var(--accent-amber);
}

.stat-card-info {
    --card-accent: var(--accent-slate);
}

.stat-card-error {
    --card-accent: var(--accent-rose);
}

.stat-card .stat-number {
    font-family: var(--font-display) !important;
    font-size: 2.6rem !important;
    font-weight: 700 !important;
    color: var(--ink) !important;
    line-height: 1 !important;
    animation: enterUp 0.6s ease-out both;
}

.stat-card .stat-label {
    font-family: var(--font-mono) !important;
    font-size: 0.72rem !important;
    font-weight: 500 !important;
    text-transform: uppercase !important;
    letter-spacing: 1.5px !important;
    color: var(--ink-muted) !important;
    margin-top: 6px !important;
}

.stat-card .stat-icon {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 2rem !important;
    opacity: 0.08;
    color: var(--ink);
}

/* ===== EXAM CARDS (Student) ===== */
.exam-card {
    border-radius: var(--radius-lg) !important;
    border: 1px solid var(--rule) !important;
    background: #fff !important;
    position: relative;
    transition: all var(--transition-mid) !important;
    overflow: hidden;
}

    .exam-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 3px;
        background: var(--accent-amber);
        transform: scaleX(0);
        transform-origin: left;
        transition: transform var(--transition-mid);
    }

    .exam-card:hover::before {
        transform: scaleX(1);
    }

    .exam-card:hover {
        box-shadow: var(--shadow-lg) !important;
        transform: translateY(-6px) !important;
    }

    .exam-card .exam-subject-badge {
        background: var(--accent-amber-light);
        color: var(--accent-amber-dark);
        padding: 4px 12px;
        border-radius: var(--radius-sm);
        font-size: 0.75rem;
        font-weight: 600;
        font-family: var(--font-mono);
        letter-spacing: 0.5px;
        text-transform: uppercase;
        display: inline-block;
        margin-bottom: 10px;
        border: 1px solid rgba(232, 160, 32, 0.2);
    }

    .exam-card .exam-info-item {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 5px 0;
        color: var(--ink-soft);
        font-size: 0.875rem;
        border-bottom: 1px solid var(--paper-mid);
    }

        .exam-card .exam-info-item:last-child {
            border-bottom: none;
        }

        .exam-card .exam-info-item .mud-icon-root {
            color: var(--ink-muted);
            font-size: 1rem !important;
        }

/* ===== BUTTONS ===== */
.mud-button-root.mud-button-filled {
    font-family: var(--font-body) !important;
    font-weight: 600 !important;
    font-size: 0.875rem !important;
    letter-spacing: 0.3px !important;
    border-radius: var(--radius-md) !important;
    text-transform: none !important;
    transition: all var(--transition-fast) !important;
    box-shadow: none !important;
    border: 1px solid transparent !important;
}

    .mud-button-root.mud-button-filled:hover {
        transform: translateY(-1px) !important;
        box-shadow: var(--shadow-md) !important;
    }

    .mud-button-root.mud-button-filled:active {
        transform: translateY(0) scale(0.99) !important;
        box-shadow: none !important;
    }

.btn-gradient-primary {
    background: var(--ink) !important;
    color: var(--paper) !important;
}

    .btn-gradient-primary:hover {
        background: var(--ink-soft) !important;
    }

.btn-start-exam {
    background: var(--accent-teal) !important;
    color: #fff !important;
    border-radius: var(--radius-md) !important;
    padding: 10px 22px !important;
    font-size: 0.9rem !important;
    font-weight: 600 !important;
    font-family: var(--font-body) !important;
    letter-spacing: 0.3px !important;
    transition: all var(--transition-fast) !important;
    border: none !important;
    box-shadow: 0 2px 8px rgba(26, 122, 110, 0.25) !important;
}

    .btn-start-exam:hover {
        background: var(--accent-teal-dark) !important;
        transform: translateY(-2px) !important;
        box-shadow: 0 6px 16px rgba(26, 122, 110, 0.3) !important;
    }

/* ===== TABLES ===== */
.mud-table {
    border-radius: var(--radius-lg) !important;
    overflow: hidden !important;
    border: 1px solid var(--rule) !important;
    box-shadow: var(--shadow-sm) !important;
}

.mud-table-head .mud-table-cell {
    background: var(--paper-warm) !important;
    color: var(--ink-muted) !important;
    font-family: var(--font-mono) !important;
    font-weight: 500 !important;
    text-transform: uppercase !important;
    font-size: 0.7rem !important;
    letter-spacing: 1.5px !important;
    padding: 14px 16px !important;
    border-bottom: 2px solid var(--rule) !important;
}

.mud-table-body .mud-table-row {
    transition: background var(--transition-fast) !important;
}

    .mud-table-body .mud-table-row:hover {
        background: var(--paper-warm) !important;
        transform: none !important;
    }

.mud-table-body .mud-table-cell {
    padding: 13px 16px !important;
    border-bottom: 1px solid var(--paper-mid) !important;
    color: var(--ink-soft) !important;
    font-size: 0.875rem !important;
}

/* ===== CHIPS ===== */
.mud-chip {
    border-radius: var(--radius-sm) !important;
    font-weight: 600 !important;
    font-family: var(--font-mono) !important;
    font-size: 0.72rem !important;
    text-transform: uppercase !important;
    letter-spacing: 0.8px !important;
    transition: all var(--transition-fast) !important;
    border: 1px solid transparent !important;
}

.chip-pass {
    background: var(--accent-teal-light) !important;
    color: var(--accent-teal-dark) !important;
    border-color: rgba(26, 122, 110, 0.2) !important;
}

.chip-fail {
    background: var(--accent-rose-light) !important;
    color: var(--accent-rose-dark) !important;
    border-color: rgba(192, 54, 74, 0.2) !important;
}

/* ===== HOME PAGE ===== */
.home-hero {
    background: var(--ink) !important;
    border-radius: var(--radius-xl) !important;
    padding: 56px 48px !important;
    color: var(--paper) !important;
    position: relative;
    overflow: hidden;
    border: none !important;
}

    .home-hero::before {
        content: '';
        position: absolute;
        top: -2px;
        left: -2px;
        right: -2px;
        bottom: -2px;
        background: repeating-linear-gradient( 45deg, transparent, transparent 40px, rgba(255,255,255,0.015) 40px, rgba(255,255,255,0.015) 80px );
        pointer-events: none;
    }

    .home-hero::after {
        content: '';
        position: absolute;
        bottom: 0;
        right: 0;
        width: 200px;
        height: 200px;
        background: var(--accent-amber);
        opacity: 0.06;
        border-radius: 50%;
        transform: translate(40px, 40px);
        pointer-events: none;
    }

    .home-hero h3 {
        font-family: var(--font-display) !important;
        font-size: 2.4rem !important;
        font-weight: 700 !important;
        line-height: 1.2 !important;
        margin-bottom: 14px !important;
        position: relative;
    }

    .home-hero p {
        font-size: 1.05rem !important;
        opacity: 0.7;
        max-width: 480px;
        margin: 0 auto;
        line-height: 1.7;
        position: relative;
    }

/* ===== TIMER (Take Exam) ===== */
.timer-chip {
    font-family: var(--font-mono) !important;
    font-size: 1.3rem !important;
    font-weight: 500 !important;
    padding: 8px 20px !important;
    border-radius: var(--radius-md) !important;
    background: var(--paper-warm) !important;
    color: var(--ink) !important;
    border: 1px solid var(--rule) !important;
    animation: tickDown 1s ease-in-out infinite;
    box-shadow: var(--shadow-sm) !important;
    letter-spacing: 1px;
}

.timer-danger {
    background: var(--accent-rose-light) !important;
    color: var(--accent-rose) !important;
    border-color: rgba(192, 54, 74, 0.25) !important;
    animation: tickDown 0.5s ease-in-out infinite !important;
}

/* ===== PAGE CONTAINER ===== */
.page-container {
    animation: enterUp 0.45s ease-out both;
}

/* ===== LOADING CONTAINER ===== */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    animation: enterUp 0.45s ease-out both;
}

/* ===== INPUT FIELDS ===== */
.mud-input-root {
    border-radius: var(--radius-md) !important;
    font-family: var(--font-body) !important;
}

.mud-input-outlined-border {
    border-color: var(--rule) !important;
    border-radius: var(--radius-md) !important;
}

    .mud-input-outlined-border:hover {
        border-color: var(--ink-muted) !important;
    }

    .mud-input-outlined-border.mud-focused {
        border-color: var(--accent-amber) !important;
        border-width: 2px !important;
    }

/* ===== PROGRESS BARS ===== */
.mud-progress-linear {
    border-radius: var(--radius-sm) !important;
    height: 6px !important;
    background: var(--paper-mid) !important;
}

    .mud-progress-linear .mud-progress-linear-bar {
        background: var(--accent-amber) !important;
        border-radius: var(--radius-sm) !important;
    }

/* ===== DIVIDERS ===== */
.mud-divider {
    border-color: var(--rule) !important;
}

/* ===== TYPOGRAPHY HELPERS ===== */
.display-heading {
    font-family: var(--font-display) !important;
    font-weight: 700 !important;
    color: var(--ink) !important;
}

.mono-label {
    font-family: var(--font-mono) !important;
    font-size: 0.72rem !important;
    font-weight: 500 !important;
    text-transform: uppercase !important;
    letter-spacing: 1.5px !important;
    color: var(--ink-muted) !important;
}

/* ===== BADGE VARIANTS ===== */
.badge-amber {
    background: var(--accent-amber-light);
    color: var(--accent-amber-dark);
    border: 1px solid rgba(232,160,32,0.2);
    padding: 3px 10px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.badge-teal {
    background: var(--accent-teal-light);
    color: var(--accent-teal-dark);
    border: 1px solid rgba(26,122,110,0.2);
    padding: 3px 10px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.badge-rose {
    background: var(--accent-rose-light);
    color: var(--accent-rose-dark);
    border: 1px solid rgba(192,54,74,0.2);
    padding: 3px 10px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.badge-slate {
    background: var(--accent-slate-light);
    color: var(--accent-slate-dark);
    border: 1px solid rgba(61,79,110,0.2);
    padding: 3px 10px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

/* ===== SECTION DIVIDER WITH LABEL ===== */
.section-rule {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 24px 0;
}

    .section-rule::before,
    .section-rule::after {
        content: '';
        flex: 1;
        height: 1px;
        background: var(--rule);
    }

    .section-rule span {
        font-family: var(--font-mono);
        font-size: 0.7rem;
        font-weight: 500;
        text-transform: uppercase;
        letter-spacing: 2px;
        color: var(--ink-muted);
        white-space: nowrap;
    }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--paper-warm);
}

::-webkit-scrollbar-thumb {
    background: var(--paper-mid);
    border-radius: 3px;
}

    ::-webkit-scrollbar-thumb:hover {
        background: var(--ink-muted);
    }

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
    .stat-card .stat-number {
        font-size: 1.9rem !important;
    }

    .home-hero {
        padding: 32px 24px !important;
    }

        .home-hero h3 {
            font-size: 1.7rem !important;
        }
}