/**
 * Berazen Akademi (berazen.zertucha.com) — Üst Sınıf Profesyonel Mor & Turkuaz Tasarım Sistemi
 * Kurucular: Berat & Zeren
 */

:root {
    /* Mor (Royal Purple) Paleti */
    --purple-950: #0f0b29;
    --purple-900: #1e1b4b;
    --purple-800: #3b0764;
    --purple-700: #5b21b6;
    --purple-600: #6d28d9;
    --purple-500: #7c3aed;
    --purple-400: #a78bfa;
    --purple-200: #ddd6fe;
    --purple-100: #ede9fe;
    --purple-50:  #f5f3ff;

    /* Turkuaz (Vibrant Turquoise / Cyan) Paleti */
    --turquoise-900: #083344;
    --turquoise-700: #0e7490;
    --turquoise-600: #0891b2;
    --turquoise-500: #06b6d4;
    --turquoise-400: #22d3ee;
    --turquoise-300: #67e8f9;
    --turquoise-100: #cffafe;
    --turquoise-50:  #ecfeff;

    /* Nötr ve Yüzey Tonları */
    --bg-body: #f8f9fe;
    --bg-surface: #ffffff;
    --bg-muted: #f1f4fb;
    --text-main: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --border-purple: rgba(124, 58, 237, 0.18);
    --border-turquoise: rgba(6, 182, 212, 0.25);

    /* Durum Renkleri */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;

    /* İmza Gradyanlar */
    --grad-primary: linear-gradient(135deg, #6d28d9 0%, #7c3aed 48%, #06b6d4 100%);
    --grad-turquoise: linear-gradient(135deg, #0891b2 0%, #06b6d4 50%, #22d3ee 100%);
    --grad-purple-dark: linear-gradient(135deg, #130f33 0%, #1e1b4b 55%, #083344 100%);
    --grad-card-glow: linear-gradient(135deg, rgba(124, 58, 237, 0.08) 0%, rgba(6, 182, 212, 0.08) 100%);

    /* Gölgeler & Köşe Yuvarlaklığı */
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 10px 30px -5px rgba(109, 40, 217, 0.08), 0 4px 12px rgba(6, 182, 212, 0.05);
    --shadow-lg: 0 20px 45px -10px rgba(109, 40, 217, 0.15), 0 8px 20px rgba(6, 182, 212, 0.10);
    --shadow-glow: 0 10px 28px rgba(124, 58, 237, 0.32), 0 4px 14px rgba(6, 182, 212, 0.25);
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.65;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: all 0.22s ease;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: 1260px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================================================
   ÜST DUYURU BARI (Top Announcement Bar)
   ============================================================================ */
.top-announcement {
    background: var(--grad-primary);
    color: #ffffff;
    font-size: 0.875rem;
    font-weight: 600;
    padding: 10px 16px;
    text-align: center;
    position: relative;
    z-index: 1001;
    box-shadow: 0 2px 12px rgba(109, 40, 217, 0.2);
}

.top-announcement a {
    color: var(--turquoise-300);
    text-decoration: underline;
    margin-left: 8px;
    font-weight: 700;
}

/* ============================================================================
   NAVBAR (Modern Glassmorphic Mor & Turkuaz Başlık)
   ============================================================================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.90);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(124, 58, 237, 0.12);
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.03);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 78px;
    gap: 20px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    font-size: 1.35rem;
    letter-spacing: -0.03em;
    color: var(--purple-900);
}

.brand-icon {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    background: var(--grad-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.25rem;
    box-shadow: var(--shadow-glow);
}

.brand-text span {
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brand-sub {
    display: block;
    font-size: 0.70rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--turquoise-600);
    margin-top: -4px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
    list-style: none;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 15px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.93rem;
    color: var(--text-secondary);
}

.nav-link i {
    color: var(--purple-500);
    font-size: 0.95rem;
    transition: transform 0.2s ease, color 0.2s ease;
}

.nav-link:hover, .nav-link.active {
    background: var(--purple-50);
    color: var(--purple-700);
}

.nav-link:hover i, .nav-link.active i {
    color: var(--turquoise-500);
    transform: translateY(-1px);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.mobile-menu-btn {
    display: none;
    background: var(--purple-50);
    color: var(--purple-700);
    border: 1px solid var(--purple-200);
    width: 42px;
    height: 42px;
    border-radius: 12px;
    font-size: 1.15rem;
    cursor: pointer;
}

/* ============================================================================
   BUTONLAR (Buttons)
   ============================================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 22px;
    border-radius: 13px;
    font-weight: 700;
    font-size: 0.92rem;
    border: none;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    text-decoration: none;
    line-height: 1.2;
}

.btn-primary {
    background: var(--grad-primary);
    color: #ffffff;
    box-shadow: 0 8px 22px -4px rgba(109, 40, 217, 0.45);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
    color: #ffffff;
}

.btn-turquoise {
    background: var(--grad-turquoise);
    color: #ffffff;
    box-shadow: 0 8px 22px -4px rgba(6, 182, 212, 0.42);
}

.btn-turquoise:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(6, 182, 212, 0.55);
    color: #ffffff;
}

.btn-outline {
    background: #ffffff;
    color: var(--purple-700);
    border: 1.5px solid var(--purple-200);
}

.btn-outline:hover {
    background: var(--purple-50);
    border-color: var(--purple-500);
    transform: translateY(-1px);
}

.btn-ghost-light {
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(8px);
}

.btn-ghost-light:hover {
    background: rgba(255, 255, 255, 0.22);
    border-color: var(--turquoise-300);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 8px 14px;
    font-size: 0.83rem;
    border-radius: 10px;
}

.btn-lg {
    padding: 15px 30px;
    font-size: 1.02rem;
    border-radius: 15px;
}

/* ============================================================================
   HERO BÖLÜMÜ (Kozmik Mor & Turkuaz Vitrin)
   ============================================================================ */
.hero-section {
    position: relative;
    background:
        radial-gradient(circle at 12% 22%, rgba(124, 58, 237, 0.45) 0%, transparent 45%),
        radial-gradient(circle at 88% 78%, rgba(6, 182, 212, 0.42) 0%, transparent 48%),
        var(--grad-purple-dark);
    color: #ffffff;
    padding: 76px 0 88px;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 44px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 16px;
    border-radius: var(--radius-full);
    background: rgba(6, 182, 212, 0.18);
    border: 1px solid rgba(34, 211, 238, 0.40);
    color: var(--turquoise-300);
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 22px;
}

.hero-title {
    font-size: clamp(2.15rem, 4vw, 3.35rem);
    font-weight: 800;
    line-height: 1.14;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
}

.hero-title .text-highlight {
    background: linear-gradient(90deg, #a78bfa 0%, #22d3ee 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: #cbd5e1;
    margin-bottom: 32px;
    max-width: 600px;
}

.hero-cta-group {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 38px;
}

.hero-stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-stat-item strong {
    display: block;
    font-size: 1.55rem;
    font-weight: 800;
    color: var(--turquoise-300);
}

.hero-stat-item span {
    font-size: 0.82rem;
    color: #cbd5e1;
}

/* Günün Sorusu Vitrin Kartı */
.daily-challenge-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(34, 211, 238, 0.32);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.32);
    position: relative;
}

.daily-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.daily-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--grad-turquoise);
    color: #fff;
    padding: 5px 13px;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
}

.daily-xp-tag {
    background: rgba(124, 58, 237, 0.35);
    border: 1px solid var(--purple-400);
    color: #fff;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 700;
}

.daily-question-text {
    font-size: 1.02rem;
    font-weight: 600;
    color: #f8fafc;
    margin-bottom: 18px;
    line-height: 1.55;
}

.daily-options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 16px;
}

.daily-option-label {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 14px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.16);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.2s ease;
}

.daily-option-label:hover {
    background: rgba(6, 182, 212, 0.22);
    border-color: var(--turquoise-400);
}

.daily-option-label input[type="radio"] {
    accent-color: var(--turquoise-400);
    width: 17px;
    height: 17px;
}

/* ============================================================================
   BÖLÜM BAŞLIKLARI & KARTLAR (Sections & Cards)
   ============================================================================ */
.section-block {
    padding: 68px 0;
}

.section-muted {
    background: linear-gradient(180deg, #f3f0ff 0%, #ecfeff 100%);
}

.section-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 36px;
    flex-wrap: wrap;
}

.section-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--purple-600);
    background: var(--purple-100);
    padding: 5px 12px;
    border-radius: var(--radius-full);
    margin-bottom: 10px;
}

.section-title {
    font-size: clamp(1.55rem, 2.6vw, 2.15rem);
    font-weight: 800;
    color: var(--purple-950);
    letter-spacing: -0.02em;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 0.98rem;
    margin-top: 4px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 22px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
    gap: 26px;
}

.card {
    background: var(--bg-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: all 0.25s ease;
    position: relative;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(124, 58, 237, 0.28);
}

/* Sınıf Kartları */
.grade-card {
    overflow: hidden;
    border-top: 4px solid var(--purple-500);
}

.grade-card:nth-child(even) {
    border-top-color: var(--turquoise-500);
}

.grade-badge-num {
    width: 52px;
    height: 52px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    font-weight: 800;
    color: #fff;
    background: var(--grad-primary);
    margin-bottom: 16px;
    box-shadow: 0 8px 18px rgba(109, 40, 217, 0.25);
}

.grade-card:nth-child(even) .grade-badge-num {
    background: var(--grad-turquoise);
    box-shadow: 0 8px 18px rgba(6, 182, 212, 0.25);
}

.grade-meta-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 16px 0;
}

.meta-pill {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 11px;
    border-radius: 99px;
    font-size: 0.78rem;
    font-weight: 700;
    background: var(--bg-muted);
    color: var(--text-secondary);
}

.meta-pill.purple {
    background: var(--purple-100);
    color: var(--purple-700);
}

.meta-pill.turquoise {
    background: var(--turquoise-100);
    color: var(--turquoise-700);
}

.meta-pill.success {
    background: #d1fae5;
    color: #065f46;
}

/* Kurucular (Berat & Zeren) Özel Kartları */
.founders-banner {
    background: var(--grad-purple-dark);
    border-radius: var(--radius-lg);
    padding: 44px;
    color: #fff;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.founder-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(34, 211, 238, 0.28);
    border-radius: var(--radius-md);
    padding: 26px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.founder-avatar {
    width: 68px;
    height: 68px;
    border-radius: 18px;
    background: var(--grad-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.65rem;
    font-weight: 800;
    color: #fff;
    flex-shrink: 0;
    box-shadow: var(--shadow-glow);
}

.founder-card:nth-child(2) .founder-avatar {
    background: var(--grad-turquoise);
}

/* ============================================================================
   SAYFA BAŞLIK BANNERI (Subpage Hero)
   ============================================================================ */
.page-hero {
    background: var(--grad-purple-dark);
    color: #ffffff;
    padding: 46px 0;
    border-bottom: 3px solid var(--turquoise-500);
}

.page-hero h1 {
    font-size: clamp(1.65rem, 3vw, 2.35rem);
    font-weight: 800;
    margin-bottom: 8px;
}

.page-hero p {
    color: #cbd5e1;
    max-width: 720px;
}

/* ============================================================================
   FİLTRE ÇUBUĞU VE FORMLAR (Filter Bar & Forms)
   ============================================================================ */
.filter-bar {
    background: #ffffff;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    padding: 20px;
    margin-bottom: 28px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
}

.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    font-weight: 700;
    font-size: 0.88rem;
    color: var(--purple-950);
    margin-bottom: 7px;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border-radius: 12px;
    border: 1.5px solid var(--border-color);
    background: #ffffff;
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--text-main);
    transition: all 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--purple-500);
    box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.12);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

/* ============================================================================
   SORU - CEVAP TOPLULUĞU (Q&A Hub)
   ============================================================================ */
.qa-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 20px;
    padding: 22px;
    background: #fff;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    margin-bottom: 16px;
    transition: all 0.2s ease;
}

.qa-item:hover {
    border-color: var(--turquoise-500);
    box-shadow: var(--shadow-md);
}

.qa-item.solved {
    border-left: 5px solid var(--success);
}

.qa-item.unsolved {
    border-left: 5px solid var(--purple-500);
}

.qa-stats-box {
    display: flex;
    gap: 10px;
    flex-shrink: 0;
}

.qa-stat-pill {
    min-width: 68px;
    padding: 10px 12px;
    border-radius: 12px;
    text-align: center;
    background: var(--bg-muted);
}

.qa-stat-pill.best {
    background: #d1fae5;
    color: #065f46;
}

.qa-stat-pill strong {
    display: block;
    font-size: 1.1rem;
    font-weight: 800;
}

.qa-stat-pill span {
    font-size: 0.72rem;
    font-weight: 600;
}

.answer-card {
    background: #ffffff;
    border-radius: var(--radius-md);
    border: 1.5px solid var(--border-color);
    padding: 24px;
    margin-bottom: 18px;
}

.answer-card.best-answer {
    border: 2px solid var(--success);
    background: linear-gradient(180deg, rgba(16, 185, 129, 0.05) 0%, #ffffff 100%);
}

/* ============================================================================
   ONLİNE SINAV MOTORU (Interactive Exam Runner)
   ============================================================================ */
.exam-runner-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 26px;
    align-items: start;
}

.exam-question-box {
    background: #ffffff;
    border-radius: var(--radius-md);
    border: 1.5px solid var(--border-color);
    padding: 28px;
    margin-bottom: 22px;
    box-shadow: var(--shadow-sm);
}

.exam-option-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    border-radius: 13px;
    border: 1.5px solid var(--border-color);
    margin-bottom: 11px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 600;
}

.exam-option-item:hover {
    border-color: var(--turquoise-500);
    background: var(--turquoise-50);
}

.exam-option-item input[type="radio"]:checked + .opt-letter {
    background: var(--grad-primary);
    color: #fff;
    border-color: transparent;
}

.opt-letter {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    border: 1.5px solid var(--border-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: var(--purple-700);
    flex-shrink: 0;
}

.exam-sidebar-sticky {
    position: sticky;
    top: 96px;
    background: #ffffff;
    border-radius: var(--radius-md);
    border: 1.5px solid var(--border-purple);
    padding: 24px;
    box-shadow: var(--shadow-md);
}

.timer-display {
    background: var(--grad-purple-dark);
    color: var(--turquoise-300);
    font-size: 1.85rem;
    font-weight: 800;
    text-align: center;
    padding: 14px;
    border-radius: 14px;
    margin-bottom: 18px;
    letter-spacing: 0.05em;
}

.question-palette {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
    margin-bottom: 20px;
}

.palette-btn {
    height: 38px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: var(--bg-muted);
    font-weight: 700;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.palette-btn.answered {
    background: var(--grad-turquoise);
    color: #fff;
    border-color: transparent;
}

/* ============================================================================
   3D BİLGİ KARTLARI (Interactive Flip Flashcards)
   ============================================================================ */
.flashcard-scene {
    perspective: 1000px;
    height: 270px;
    cursor: pointer;
}

.flashcard-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
}

.flashcard-scene.is-flipped .flashcard-inner {
    transform: rotateY(180deg);
}

.flashcard-face {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: var(--radius-md);
    padding: 26px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: var(--shadow-md);
}

.flashcard-front {
    background: #ffffff;
    border: 2px solid var(--purple-200);
}

.flashcard-back {
    background: var(--grad-primary);
    color: #ffffff;
    transform: rotateY(180deg);
}

/* ============================================================================
   BİLDİRİM KUTULARI (Flash Alerts)
   ============================================================================ */
.alert {
    padding: 15px 20px;
    border-radius: 14px;
    margin: 18px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 0.94rem;
}

.alert-success {
    background: #ecfdf5;
    border: 1px solid #6ee7b7;
    color: #065f46;
}

.alert-error {
    background: #fef2f2;
    border: 1px solid #fca5a5;
    color: #991b1b;
}

.inline-code {
    background: var(--purple-100);
    color: var(--purple-800);
    padding: 2px 7px;
    border-radius: 6px;
    font-family: monospace;
    font-size: 0.9em;
}

/* ============================================================================
   ALT BİLGİ (Footer)
   ============================================================================ */
.site-footer {
    margin-top: auto;
    background: var(--purple-950);
    color: #cbd5e1;
    padding: 64px 0 32px;
    border-top: 4px solid var(--turquoise-500);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 36px;
    margin-bottom: 42px;
}

.footer-title {
    color: #ffffff;
    font-size: 1.02rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a:hover {
    color: var(--turquoise-400);
    padding-left: 4px;
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 14px;
    font-size: 0.86rem;
}

/* ============================================================================
   MOBİL UYUMLULUK (Responsive Breakpoints)
   ============================================================================ */
@media (max-width: 992px) {
    .hero-grid, .exam-runner-layout {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .mobile-menu-btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
    .nav-links {
        display: none;
        position: absolute;
        top: 78px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 2px solid var(--purple-200);
        box-shadow: var(--shadow-lg);
    }
    .nav-links.show {
        display: flex;
    }
}

@media (max-width: 640px) {
    .hero-stats-row, .daily-options-grid, .footer-grid, .grid-2 {
        grid-template-columns: 1fr;
    }
    .qa-item {
        flex-direction: column;
    }
}