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

:root {
    --primary-color: #e74c3c;
    --secondary-color: #c0392b;
    --heart-color: #e74c3c;
    --danger-color: #c0392b;
    --warning-color: #f39c12;
    --success-color: #27ae60;
    --dark-color: #2c3e50;
    --light-color: #f8f9fa;
    --sidebar-width: 280px;
    --header-height: 60px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--light-color);
    color: var(--dark-color);
    line-height: 1.6;
}

/* Login Sayfası */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 400px;
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.login-box h1 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 10px;
    font-size: 28px;
}

.login-box h2 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--dark-color);
    font-size: 20px;
    font-weight: 400;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--dark-color);
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.error-message {
    background-color: #ffebee;
    color: var(--danger-color);
    padding: 12px;
    border-radius: 5px;
    margin-bottom: 20px;
    border-left: 4px solid var(--danger-color);
}

.success-message {
    background-color: #e8f5e9;
    color: var(--primary-color);
    padding: 12px;
    border-radius: 5px;
    margin-bottom: 20px;
    border-left: 4px solid var(--primary-color);
}

/* Ana Layout */
.main-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, #2c3e50 0%, #34495e 100%);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 20px;
    background: rgba(0,0,0,0.2);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h2 {
    font-size: 22px;
    margin-bottom: 5px;
}

.sidebar-header .username {
    font-size: 14px;
    opacity: 0.8;
}

.sidebar-menu {
    list-style: none;
    padding: 10px 0;
}

.sidebar-menu li {
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    color: white;
    text-decoration: none;
    transition: background-color 0.3s;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background-color: rgba(255,255,255,0.1);
    border-left: 4px solid var(--primary-color);
}

.sidebar-menu a i {
    margin-right: 12px;
    width: 20px;
    text-align: center;
}

.logout-btn {
    margin-top: 20px;
    padding: 0 20px;
}

.logout-btn a {
    display: block;
    padding: 12px 20px;
    background-color: rgba(244, 67, 54, 0.2);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    text-align: center;
    transition: background-color 0.3s;
}

.logout-btn a:hover {
    background-color: rgba(244, 67, 54, 0.3);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 20px;
    transition: margin-left 0.3s ease;
}

.content-header {
    background: white;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.content-header h1 {
    color: var(--dark-color);
    font-size: 28px;
    margin-bottom: 10px;
}

/* Cards */
.card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.card h2 {
    color: var(--dark-color);
    margin-bottom: 15px;
    font-size: 20px;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 25px;
    border-radius: 8px;
    text-align: center;
}

.stat-card h3 {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 10px;
    text-transform: uppercase;
}

.stat-card .value {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 5px;
}

.stat-card.secondary {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.stat-card.success {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.stat-card.warning {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background-color: #45a049;
}

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

.btn-secondary:hover {
    background-color: #0b7dda;
}

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

.btn-danger:hover {
    background-color: #da190b;
}

/* Tables */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

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

table th {
    background-color: var(--light-color);
    font-weight: 600;
    color: var(--dark-color);
}

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

/* Forms */
.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 15px;
    left: 15px;
    z-index: 1001;
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 20px;
}

/* Mobil Responsive */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        padding: 60px 15px 15px;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .login-box {
        padding: 30px 20px;
    }
    
    table {
        font-size: 14px;
    }
    
    table th,
    table td {
        padding: 8px;
    }
}

@media (max-width: 480px) {
    .content-header h1 {
        font-size: 22px;
    }
    
    .card h2 {
        font-size: 18px;
    }
    
    .stat-card .value {
        font-size: 28px;
    }
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: #999;
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 15px;
    opacity: 0.5;
}

/* Loading */
.loading {
    text-align: center;
    padding: 40px;
    color: #999;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success {
    background-color: #e8f5e9;
    color: var(--primary-color);
}

.badge-warning {
    background-color: #fff3e0;
    color: var(--warning-color);
}

.badge-danger {
    background-color: #ffebee;
    color: var(--danger-color);
}