/**
 * Deneme Sınavı Sistemi - Ana CSS Dosyası
 * AdminLTE-2 Benzeri Tema
 */

/* ============================================
   Genel Stiller
   ============================================ */

:root {
    --primary-color: #3c8dbc;
    --success-color: #00a65a;
    --info-color: #00c0ef;
    --warning-color: #f39c12;
    --danger-color: #dd4b39;
    --dark-color: #222d32;
    --light-color: #f4f4f4;
    --sidebar-width: 250px;
}

body {
    font-family: 'Source Sans Pro', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: #333;
    background-color: #ecf0f5;
}

/* ============================================
   Navbar (AdminLTE Benzeri)
   ============================================ */

.navbar-dark {
    background-color: var(--dark-color) !important;
    border-bottom: 0;
}

.navbar-brand {
    font-weight: 600;
    font-size: 18px;
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.8) !important;
    padding: 15px;
    transition: all 0.3s;
}

.navbar-nav .nav-link:hover {
    color: #fff !important;
    background-color: rgba(255, 255, 255, 0.1);
}

/* ============================================
   Kartlar
   ============================================ */

.card {
    border: 0;
    border-radius: 3px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    margin-bottom: 20px;
}

.card-header {
    background-color: #fff;
    border-bottom: 1px solid #f4f4f4;
    border-radius: 3px 3px 0 0;
    padding: 15px;
    font-weight: 600;
}

.card-body {
    padding: 20px;
}

/* Renkli kartlar */
.card.bg-primary,
.card.bg-success,
.card.bg-info,
.card.bg-warning,
.card.bg-danger {
    border: 0;
}

/* ============================================
   Butonlar
   ============================================ */

.btn {
    border-radius: 3px;
    font-weight: 500;
    transition: all 0.3s;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: #367fa9;
    border-color: #367fa9;
}

.btn-success {
    background-color: var(--success-color);
    border-color: var(--success-color);
}

.btn-success:hover {
    background-color: #008d4c;
    border-color: #008d4c;
}

.btn-info {
    background-color: var(--info-color);
    border-color: var(--info-color);
}

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

.btn-danger {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
}

/* ============================================
   Form Elemanları
   ============================================ */

.form-control,
.form-select {
    border-radius: 0;
    border-color: #d2d6de;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: none;
}

.form-label {
    font-weight: 600;
    color: #444;
}

/* ============================================
   DataTables
   ============================================ */

.dataTables_wrapper {
    padding: 0;
}

.dataTables_filter input {
    border-radius: 0;
    border-color: #d2d6de;
}

.dataTables_length select {
    border-radius: 0;
    border-color: #d2d6de;
}

table.dataTable thead th {
    font-weight: 600;
    border-bottom: 2px solid #f4f4f4;
}

table.dataTable tbody tr:hover {
    background-color: #f9f9f9;
}

/* ============================================
   Optik Cevap Tablosu
   ============================================ */

.optik-table {
    font-size: 14px;
}

.optik-table thead th {
    background-color: #f4f4f4;
    font-weight: 600;
    text-align: center;
    padding: 12px;
}

.optik-table tbody td {
    vertical-align: middle;
    padding: 10px;
}

.optik-cell {
    padding: 8px !important;
}

.optik-cell .form-check {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
}

.optik-cell .form-check-input {
    width: 24px;
    height: 24px;
    margin: 0;
    cursor: pointer;
    border: 2px solid #ccc;
}

.optik-cell .form-check-input:checked {
    background-color: var(--success-color);
    border-color: var(--success-color);
}

.optik-cell .form-check-input:hover {
    border-color: var(--primary-color);
}

/* Mobil için daha büyük dokunmatik hedefler */
@media (max-width: 768px) {
    .optik-cell .form-check-input {
        width: 32px;
        height: 32px;
    }
    
    .optik-table tbody td {
        padding: 15px 8px;
    }
}

/* ============================================
   Tabs (Dersler)
   ============================================ */

.nav-tabs {
    border-bottom: 2px solid #f4f4f4;
}

.nav-tabs .nav-link {
    border: 0;
    border-bottom: 3px solid transparent;
    color: #444;
    font-weight: 600;
    transition: all 0.3s;
}

.nav-tabs .nav-link:hover {
    border-color: transparent;
    background-color: #f9f9f9;
}

.nav-tabs .nav-link.active {
    border-color: transparent transparent var(--primary-color);
    color: var(--primary-color);
    background-color: #fff;
}

/* ============================================
   Badge'ler
   ============================================ */

.badge {
    font-weight: 500;
    padding: 0.35em 0.65em;
}

/* ============================================
   Alert'ler
   ============================================ */

.alert {
    border: 0;
    border-radius: 3px;
    border-left: 4px solid transparent;
}

.alert-success {
    background-color: #dff0d8;
    border-left-color: var(--success-color);
    color: #3c763d;
}

.alert-info {
    background-color: #d9edf7;
    border-left-color: var(--info-color);
    color: #31708f;
}

.alert-warning {
    background-color: #fcf8e3;
    border-left-color: var(--warning-color);
    color: #8a6d3b;
}

.alert-danger {
    background-color: #f2dede;
    border-left-color: var(--danger-color);
    color: #a94442;
}

/* ============================================
   Progress Bar'lar
   ============================================ */

.progress {
    border-radius: 3px;
    box-shadow: none;
}

.progress-bar {
    border-radius: 3px;
}

/* ============================================
   Modal'lar
   ============================================ */

.modal-header {
    border-bottom: 1px solid #f4f4f4;
}

.modal-footer {
    border-top: 1px solid #f4f4f4;
}

/* ============================================
   Sticky Header (Sınav Ekranı)
   ============================================ */

.sticky-top {
    top: 0;
    z-index: 1020;
}

/* ============================================
   Countdown / Geri Sayım
   ============================================ */

.countdown-timer {
    font-family: 'Courier New', monospace;
    font-size: 1.5rem;
    font-weight: bold;
}

/* ============================================
   Animasyonlar
   ============================================ */

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.fade-in {
    animation: fadeIn 0.3s ease-in;
}

@keyframes slideInDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.slide-in-down {
    animation: slideInDown 0.3s ease-out;
}

/* Yanıp sönen efekt (süre dolunca) */
@keyframes blink {
    0%, 50%, 100% {
        opacity: 1;
    }
    25%, 75% {
        opacity: 0.3;
    }
}

.blink {
    animation: blink 1s infinite;
}

/* ============================================
   Spinner / Loader
   ============================================ */

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
    border-width: 0.15em;
}

/* ============================================
   Utility Classes
   ============================================ */

.shadow-sm {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important;
}

.shadow {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15) !important;
}

.shadow-lg {
    box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.175) !important;
}

/* ============================================
   Responsive
   ============================================ */

/* Tablet */
@media (max-width: 992px) {
    .container-fluid {
        padding-left: 15px;
        padding-right: 15px;
    }
}

/* Mobil */
@media (max-width: 768px) {
    body {
        font-size: 13px;
    }
    
    .card-body {
        padding: 15px;
    }
    
    .btn-lg {
        font-size: 16px;
        padding: 10px 16px;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    h3 {
        font-size: 1.25rem;
    }
    
    /* Tablo scroll */
    .table-responsive {
        border: 0;
    }
    
    /* Mobil için daha iyi card görünümü */
    .card {
        margin-bottom: 15px;
    }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
    .navbar,
    .btn,
    .sticky-top,
    .modal,
    .alert {
        display: none !important;
    }
    
    body {
        background-color: #fff;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }
}

/* ============================================
   Dark Mode (Opsiyonel)
   ============================================ */

@media (prefers-color-scheme: dark) {
    /* Dark mode tercihi varsa buraya eklenebilir */
}

/* ============================================
   Accessibility
   ============================================ */

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus görünürlüğü */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

button:focus,
a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ============================================
   Custom Scrollbar (Webkit)
   ============================================ */

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}