/* ============================================
   OAİB Sınav Sistemi - Ana Stil Dosyası
   Renkler: Kırmızı (#D32F2F, #B71C1C), Beyaz, Füme (#333, #555)
   ============================================ */

:root {
    --oaib-red: #D32F2F;
    --oaib-red-dark: #B71C1C;
    --oaib-red-light: #FFCDD2;
    --oaib-red-bg: #FFF5F5;
    --oaib-white: #FFFFFF;
    --oaib-black: #1A1A1A;
    --oaib-gray-dark: #333333;
    --oaib-gray: #555555;
    --oaib-gray-medium: #888888;
    --oaib-gray-light: #E0E0E0;
    --oaib-gray-lighter: #F5F5F5;
    --oaib-success: #2E7D32;
    --oaib-success-bg: #E8F5E9;
    --oaib-warning: #F57F17;
    --oaib-warning-bg: #FFF8E1;
    --oaib-info: #1565C0;
    --oaib-info-bg: #E3F2FD;
    --oaib-danger: #C62828;
    --oaib-danger-bg: #FFEBEE;
    --sidebar-width: 260px;
    --header-height: 60px;
    --border-radius: 8px;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.12);
    --transition: all 0.2s ease;
}

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

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    background: var(--oaib-gray-lighter);
    color: var(--oaib-gray-dark);
    line-height: 1.6;
    font-size: 14px;
}

a { color: var(--oaib-red); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--oaib-red-dark); }

/* ============================================
   Butonlar
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    line-height: 1.4;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.btn:active { transform: translateY(0); }

.btn-primary { background: var(--oaib-red); color: var(--oaib-white); }
.btn-primary:hover { background: var(--oaib-red-dark); color: var(--oaib-white); }

.btn-secondary { background: var(--oaib-gray-light); color: var(--oaib-gray-dark); }
.btn-secondary:hover { background: #ccc; color: var(--oaib-gray-dark); }

.btn-success { background: var(--oaib-success); color: var(--oaib-white); }
.btn-success:hover { background: #1B5E20; color: var(--oaib-white); }

.btn-danger { background: var(--oaib-danger); color: var(--oaib-white); }
.btn-danger:hover { background: #8E0000; color: var(--oaib-white); }

.btn-warning { background: var(--oaib-warning); color: var(--oaib-white); }

.btn-outline {
    background: transparent;
    border: 2px solid var(--oaib-red);
    color: var(--oaib-red);
}
.btn-outline:hover {
    background: var(--oaib-red);
    color: var(--oaib-white);
}

.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-lg { padding: 12px 28px; font-size: 16px; }

/* ============================================
   Admin Layout
   ============================================ */
.admin-layout { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sidebar-width);
    background: var(--oaib-black);
    color: var(--oaib-white);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.sidebar-header {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header img {
    max-width: 120px;
    height: auto;
    margin-bottom: 8px;
}

.sidebar-header h2 {
    font-size: 14px;
    font-weight: 600;
    color: var(--oaib-gray-light);
    letter-spacing: 0.5px;
}

.sidebar-nav { flex: 1; padding: 15px 0; }

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 24px;
    color: rgba(255,255,255,0.7);
    font-size: 14px;
    transition: var(--transition);
    border-left: 3px solid transparent;
}
.sidebar-nav a:hover {
    background: rgba(255,255,255,0.05);
    color: var(--oaib-white);
    border-left-color: var(--oaib-red);
}
.sidebar-nav a.active {
    background: rgba(211,47,47,0.15);
    color: var(--oaib-white);
    border-left-color: var(--oaib-red);
}
.sidebar-nav a .nav-icon { font-size: 18px; width: 24px; text-align: center; }

.sidebar-footer {
    padding: 15px 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 12px;
}
.sidebar-footer .user-info { color: rgba(255,255,255,0.6); margin-bottom: 8px; }
.sidebar-footer .user-name { color: var(--oaib-white); font-weight: 600; display: block; }

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.content-header {
    background: var(--oaib-white);
    padding: 18px 30px;
    border-bottom: 1px solid var(--oaib-gray-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.content-header h1 {
    font-size: 20px;
    font-weight: 600;
    color: var(--oaib-gray-dark);
}

.content-body { padding: 24px 30px; flex: 1; }

/* ============================================
   Kartlar
   ============================================ */
.card {
    background: var(--oaib-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-bottom: 20px;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--oaib-gray-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.card-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--oaib-gray-dark);
}

.card-body { padding: 20px; }

/* ============================================
   İstatistik Kartları
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--oaib-white);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--oaib-red);
}
.stat-card .stat-value,
.stat-card .stat-number {
    font-size: 28px;
    font-weight: 700;
    color: var(--oaib-gray-dark);
}
.stat-card .stat-label {
    font-size: 13px;
    color: var(--oaib-gray-medium);
    margin-top: 4px;
}
.stat-card.success, .stat-card.stat-success { border-left-color: var(--oaib-success); }
.stat-card.warning, .stat-card.stat-warning { border-left-color: var(--oaib-warning); }
.stat-card.info, .stat-card.stat-info { border-left-color: var(--oaib-info); }

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
}

.empty-state {
    text-align: center;
    color: var(--oaib-gray-medium);
    padding: 30px;
    font-size: 14px;
}

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

/* ============================================
   Tablolar
   ============================================ */
.table-wrapper { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
}
table th, table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--oaib-gray-light);
    font-size: 13px;
}
table th {
    background: var(--oaib-gray-lighter);
    font-weight: 600;
    color: var(--oaib-gray);
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 0.5px;
}
table tr:hover { background: #FAFAFA; }
table td .actions { display: flex; gap: 6px; }

/* ============================================
   Formlar
   ============================================ */
.form-group {
    margin-bottom: 18px;
}
.form-group label {
    display: block;
    font-weight: 600;
    color: var(--oaib-gray-dark);
    margin-bottom: 6px;
    font-size: 13px;
}
.form-group .form-hint {
    font-size: 12px;
    color: var(--oaib-gray-medium);
    margin-top: 4px;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="datetime-local"],
input[type="tel"],
textarea,
select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--oaib-gray-light);
    border-radius: 6px;
    font-size: 14px;
    color: var(--oaib-gray-dark);
    background: var(--oaib-white);
    transition: var(--transition);
}
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--oaib-red);
    box-shadow: 0 0 0 3px rgba(211,47,47,0.1);
}

textarea { min-height: 100px; resize: vertical; }

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
}
.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--oaib-red);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
}

/* ============================================
   Uyarılar / Bildirimler
   ============================================ */
.alert {
    padding: 14px 18px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.alert-success { background: var(--oaib-success-bg); color: var(--oaib-success); border-left: 4px solid var(--oaib-success); }
.alert-danger { background: var(--oaib-danger-bg); color: var(--oaib-danger); border-left: 4px solid var(--oaib-danger); }
.alert-warning { background: var(--oaib-warning-bg); color: var(--oaib-warning); border-left: 4px solid var(--oaib-warning); }
.alert-info { background: var(--oaib-info-bg); color: var(--oaib-info); border-left: 4px solid var(--oaib-info); }

/* ============================================
   Etiketler / Badges
   ============================================ */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}
.badge-success { background: var(--oaib-success-bg); color: var(--oaib-success); }
.badge-danger { background: var(--oaib-danger-bg); color: var(--oaib-danger); }
.badge-warning { background: var(--oaib-warning-bg); color: #E65100; }
.badge-info { background: var(--oaib-info-bg); color: var(--oaib-info); }
.badge-secondary { background: var(--oaib-gray-lighter); color: var(--oaib-gray); }
.badge-primary { background: var(--oaib-red-bg); color: var(--oaib-red); }

/* ============================================
   Login Sayfası
   ============================================ */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--oaib-red-dark) 0%, var(--oaib-red) 100%);
    padding: 20px;
}

.login-card {
    background: var(--oaib-white);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 420px;
    overflow: hidden;
}

.login-header {
    padding: 30px;
    text-align: center;
    background: var(--oaib-gray-lighter);
    border-bottom: 1px solid var(--oaib-gray-light);
}

.login-header img { max-width: 160px; height: auto; margin-bottom: 10px; }
.login-header h1 { font-size: 18px; color: var(--oaib-gray-dark); font-weight: 600; }
.login-header p { font-size: 13px; color: var(--oaib-gray-medium); margin-top: 4px; }

.login-body { padding: 30px; }
.login-body .btn-primary { width: 100%; padding: 12px; font-size: 15px; justify-content: center; }

/* ============================================
   Sınav Başvuru Sayfası (Public)
   ============================================ */
.public-page {
    min-height: 100vh;
    background: var(--oaib-gray-lighter);
}

.public-header {
    background: var(--oaib-red);
    color: var(--oaib-white);
    padding: 20px 30px;
    display: flex;
    align-items: center;
    gap: 16px;
}
.public-header img { height: 50px; }
.public-header h1 { font-size: 18px; font-weight: 600; }
.public-header p { font-size: 13px; opacity: 0.9; }

.public-content {
    max-width: 700px;
    margin: 30px auto;
    padding: 0 20px;
}

.public-content .card { border-top: 4px solid var(--oaib-red); }

/* ============================================
   Sınav Sayfası
   ============================================ */
.exam-page {
    min-height: 100vh;
    background: var(--oaib-gray-lighter);
    display: flex;
    flex-direction: column;
}

.exam-header {
    background: var(--oaib-white);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}
.exam-header .exam-title {
    display: flex;
    align-items: center;
    gap: 12px;
}
.exam-header .exam-title img { height: 36px; }
.exam-header .exam-title h2 { font-size: 16px; color: var(--oaib-gray-dark); }

.exam-timer {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    font-weight: 700;
    color: var(--oaib-gray-dark);
    background: var(--oaib-gray-lighter);
    padding: 8px 16px;
    border-radius: 8px;
}
.exam-timer.warning { color: var(--oaib-warning); background: var(--oaib-warning-bg); }
.exam-timer.danger { color: var(--oaib-danger); background: var(--oaib-danger-bg); animation: pulse 1s infinite; }

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

.exam-body {
    flex: 1;
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 24px;
    gap: 24px;
}

.exam-questions { flex: 1; }

.exam-sidebar-right {
    width: 280px;
    flex-shrink: 0;
}

.question-card {
    background: var(--oaib-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 16px;
}
.question-card .question-number {
    display: inline-block;
    background: var(--oaib-red);
    color: var(--oaib-white);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    text-align: center;
    line-height: 32px;
    font-weight: 700;
    font-size: 14px;
    margin-right: 10px;
}
.question-card .question-text {
    font-size: 15px;
    font-weight: 500;
    color: var(--oaib-gray-dark);
    margin-bottom: 16px;
    line-height: 1.6;
}
.question-card .question-points {
    font-size: 12px;
    color: var(--oaib-gray-medium);
    float: right;
}

.option-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border: 2px solid var(--oaib-gray-light);
    border-radius: 8px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: var(--transition);
}
.option-item:hover { border-color: var(--oaib-red-light); background: var(--oaib-red-bg); }
.option-item.selected { border-color: var(--oaib-red); background: var(--oaib-red-bg); }
.option-item input[type="radio"] { accent-color: var(--oaib-red); width: 18px; height: 18px; }
.option-item label { cursor: pointer; flex: 1; font-size: 14px; }

.question-nav {
    background: var(--oaib-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 16px;
    position: sticky;
    top: 80px;
}
.question-nav h4 { font-size: 13px; color: var(--oaib-gray); margin-bottom: 12px; }
.question-nav-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
}
.question-nav-btn {
    width: 100%;
    aspect-ratio: 1;
    border: 2px solid var(--oaib-gray-light);
    border-radius: 6px;
    background: var(--oaib-white);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    color: var(--oaib-gray);
}
.question-nav-btn:hover { border-color: var(--oaib-red); }
.question-nav-btn.answered { background: var(--oaib-red); color: var(--oaib-white); border-color: var(--oaib-red); }
.question-nav-btn.current { border-color: var(--oaib-red); color: var(--oaib-red); }

.camera-preview {
    background: var(--oaib-black);
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-top: 16px;
    box-shadow: var(--shadow);
}
.camera-preview video {
    width: 100%;
    display: block;
    transform: scaleX(-1);
}
.camera-preview .camera-label {
    padding: 6px 12px;
    background: rgba(0,0,0,0.8);
    color: var(--oaib-white);
    font-size: 11px;
    text-align: center;
}
.camera-preview .camera-status {
    display: flex;
    align-items: center;
    gap: 6px;
    justify-content: center;
}
.camera-preview .recording-dot {
    width: 8px;
    height: 8px;
    background: #F44336;
    border-radius: 50%;
    animation: blink 1s infinite;
}
@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* ============================================
   Sınav Giriş Sayfası
   ============================================ */
.exam-entry-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f5f5f5 0%, #e0e0e0 100%);
    padding: 20px;
}

.exam-entry-card {
    background: var(--oaib-white);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 520px;
    overflow: hidden;
}

.exam-entry-header {
    background: var(--oaib-red);
    padding: 24px;
    text-align: center;
    color: var(--oaib-white);
}
.exam-entry-header img { height: 60px; margin-bottom: 12px; }
.exam-entry-header h1 { font-size: 18px; font-weight: 600; }
.exam-entry-header .exam-name { font-size: 14px; opacity: 0.9; margin-top: 4px; }

.exam-entry-body { padding: 30px; }
.exam-entry-body .exam-info-item {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--oaib-gray-light);
    font-size: 14px;
}
.exam-entry-body .exam-info-label { color: var(--oaib-gray); }
.exam-entry-body .exam-info-value { font-weight: 600; color: var(--oaib-gray-dark); }

/* ============================================
   Kamera Kontrol Sayfası
   ============================================ */
.camera-check-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--oaib-gray-lighter);
    padding: 20px;
}

.camera-check-card {
    background: var(--oaib-white);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 600px;
    overflow: hidden;
}

.camera-check-header {
    padding: 20px 24px;
    background: var(--oaib-gray-lighter);
    border-bottom: 1px solid var(--oaib-gray-light);
    text-align: center;
}

.camera-check-body { padding: 24px; }

.camera-container {
    background: var(--oaib-black);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 20px;
    position: relative;
    aspect-ratio: 4/3;
}
.camera-container video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scaleX(-1);
}
.camera-container .camera-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.7);
    color: var(--oaib-white);
    font-size: 14px;
}

.camera-checklist {
    list-style: none;
    padding: 0;
}
.camera-checklist li {
    padding: 10px 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--oaib-gray-light);
    font-size: 14px;
}
.camera-checklist .check-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}
.camera-checklist .check-icon.pending { background: var(--oaib-gray-light); color: var(--oaib-gray); }
.camera-checklist .check-icon.success { background: var(--oaib-success-bg); color: var(--oaib-success); }
.camera-checklist .check-icon.error { background: var(--oaib-danger-bg); color: var(--oaib-danger); }

/* ============================================
   Başarı / Hata Sayfaları
   ============================================ */
.result-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--oaib-gray-lighter);
    padding: 20px;
}

.result-card {
    background: var(--oaib-white);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 500px;
    text-align: center;
    padding: 40px;
}
.result-card .result-icon {
    font-size: 64px;
    margin-bottom: 16px;
}
.result-card h2 {
    font-size: 22px;
    color: var(--oaib-gray-dark);
    margin-bottom: 12px;
}
.result-card p {
    color: var(--oaib-gray);
    font-size: 15px;
    margin-bottom: 24px;
}

/* ============================================
   Yardımcılar
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mr-1 { margin-right: 8px; }
.d-flex { display: flex; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-1 { flex: 1; }

.hidden { display: none !important; }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    .sidebar { display: none; }
    .main-content { margin-left: 0; }
    .content-body { padding: 16px; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .exam-body { flex-direction: column; }
    .exam-sidebar-right { width: 100%; }
}