/* Modern Minimalist Tasarım */
:root {
    /* Ana Renkler */
    --primary-color: #2d7d7d;
    --primary-hover: #225959;
    --primary-light: #3a9999;
    
    /* Arka Plan Renkleri */
    --bg-dark: #1a1a1a;
    --bg-darker: #0f0f0f;
    --bg-medium: #2d2d2d;
    --bg-light: #404040;
    
    /* Metin Renkleri */
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --text-muted: #b0b0b0;
    --text-light: #8a8a8a;
    
    /* Durum Renkleri */
    --success-color: #28a745;
    --success-bg: #1a3d2e;
    --error-color: #dc3545;
    --error-bg: #3d1a1a;
    --warning-color: #ffc107;
    --warning-bg: #3d3d1a;
    
    /* Border & Divider */
    --border-color: #404040;
    --border-light: #505050;
    --divider-color: #333333;
    
    /* Gradient & Effects */
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.4);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-secondary);
    line-height: 1.6;
}

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

/* Main Content */
main {
    min-height: calc(100vh - 160px);
    padding: 2rem 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

h1 {
    font-size: 2rem;
    font-weight: 700;
}

/* Links */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-light);
}

/* Header */
header {
    background-color: var(--bg-darker);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-primary);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info span {
    color: var(--text-secondary);
    font-weight: 500;
}

.user-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Navigation */
nav {
    background-color: var(--bg-medium);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

/* Icons */
.nav-links i {
    margin-right: 0.5rem;
    width: 16px;
}

.btn i {
    margin-right: 0.5rem;
}

.card-header i {
    margin-right: 0.5rem;
}

.logo i {
    margin-right: 0.5rem;
    color: var(--primary-color);
}

.user-info i {
    margin-right: 0.3rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    transition: all 0.3s ease;
    font-weight: 500;
    position: relative;
}

.nav-links a:hover {
    background-color: var(--bg-light);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.nav-links a.active {
    background-color: var(--primary-color);
    color: var(--text-primary);
}

/* Forms */
.form-container {
    max-width: 400px;
    margin: 5rem auto;
    padding: 2rem;
    background-color: var(--bg-medium);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-weight: 500;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
select,
textarea {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(45, 125, 125, 0.2);
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    background-color: var(--primary-color);
    color: var(--text-primary);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    font-weight: 500;
    text-align: center;
}

.btn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--border-light);
    border-color: var(--border-light);
}

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

.btn-danger:hover {
    background-color: #c82333;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--text-primary);
}

/* Cards */
.card {
    background-color: var(--bg-medium);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 8px;
}

.card-header {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

/* Table */
.table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-medium);
    border-radius: 8px;
    overflow: hidden;
}

.table th,
.table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-weight: 600;
}

.table tr:hover {
    background-color: var(--bg-light);
}

/* Dashboard */
.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background-color: var(--bg-medium);
    border: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    text-align: center;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-light);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background-color: var(--border-light);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Alerts */
.alert {
    padding: 1rem;
    margin-bottom: 1rem;
    border: 1px solid;
    border-radius: 4px;
    font-weight: 500;
}

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

.alert-error {
    background-color: var(--error-bg);
    border-color: var(--error-color);
    color: var(--error-color);
}

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

/* Link Buttons */
.link-button {
    color: var(--primary-color) !important;
    text-decoration: none !important;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border: 1px solid var(--primary-color);
    border-radius: 4px;
    transition: all 0.3s ease;
    display: inline-block;
}

.link-button:hover {
    background-color: var(--primary-color);
    color: var(--text-primary) !important;
    transform: translateY(-1px);
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    .user-info {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
    }

    .user-actions {
        gap: 0.5rem;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 0;
    }
    
    .dashboard-stats {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 10px;
    }
}