/**
 * Öğrenci Deneme Sınavı Takip Sistemi
 * Stil Dosyası - Basit ve Minimal Tasarım
 */

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.site-header {
    background-color: #2c3e50;
    color: white;
    padding: 20px;
    border-radius: 5px;
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-header h1 {
    font-size: 24px;
    font-weight: 600;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-info span {
    font-size: 14px;
}

.btn-logout {
    background-color: #e74c3c;
    color: white;
    padding: 8px 15px;
    text-decoration: none;
    border-radius: 3px;
    font-size: 14px;
    transition: background-color 0.3s;
}

.btn-logout:hover {
    background-color: #c0392b;
}

/* Main Content */
.main-content {
    background-color: white;
    padding: 30px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    min-height: 400px;
}

/* Form Stiller */
.form-container {
    max-width: 400px;
    margin: 50px auto;
    background-color: white;
    padding: 40px;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.form-container h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #2c3e50;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
}

.btn-primary {
    background-color: #3498db;
    color: white;
}

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-success {
    background-color: #27ae60;
    color: white;
}

.btn-success:hover {
    background-color: #229954;
}

.btn-danger {
    background-color: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background-color: #c0392b;
}

.btn-secondary {
    background-color: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background-color: #7f8c8d;
}

.btn-small {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-block {
    width: 100%;
    text-align: center;
}

/* Messages */
.message {
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
}

.message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.table th,
.table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #2c3e50;
}

.table tr:hover {
    background-color: #f8f9fa;
}

.table td.actions {
    text-align: right;
}

.table td.actions a,
.table td.actions button {
    margin-left: 5px;
}

/* Dashboard Cards */
.dashboard-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background-color: #fff;
    padding: 25px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
}

.card h3 {
    font-size: 36px;
    color: #3498db;
    margin-bottom: 10px;
}

.card p {
    color: #7f8c8d;
    font-size: 14px;
}

/* Navigation Links */
.nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.nav-links a {
    padding: 10px 20px;
    background-color: #ecf0f1;
    color: #2c3e50;
    text-decoration: none;
    border-radius: 4px;
    font-size: 14px;
    transition: background-color 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    background-color: #3498db;
    color: white;
}

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.page-header h2 {
    color: #2c3e50;
    font-size: 28px;
}

/* Score Table */
.score-table {
    overflow-x: auto;
}

.score-table table {
    min-width: 600px;
}

.score-table td {
    text-align: center;
}

.score-table td.student-name {
    text-align: left;
    font-weight: 500;
}

.score-table td.highlight {
    background-color: #fff3cd;
}

.score-data {
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-size: 13px;
}

.score-data .correct {
    color: #27ae60;
}

.score-data .wrong {
    color: #e74c3c;
}

.score-data .empty {
    color: #95a5a6;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}

.modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: white;
    padding: 30px;
    border-radius: 5px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-header h3 {
    color: #2c3e50;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #95a5a6;
}

.modal-close:hover {
    color: #2c3e50;
}

/* Footer */
.site-footer {
    text-align: center;
    margin-top: 30px;
    padding: 20px;
    color: #7f8c8d;
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .site-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .user-info {
        flex-direction: column;
        gap: 10px;
    }

    .page-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }

    .dashboard-cards {
        grid-template-columns: 1fr;
    }

    .nav-links {
        flex-direction: column;
    }

    .nav-links a {
        text-align: center;
    }

    .table {
        font-size: 12px;
    }

    .table th,
    .table td {
        padding: 8px;
    }
}

/* Loading Spinner */
.spinner {
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}