:root {
    --primary: #2563eb;       /* Profesyonel Mavi */
    --primary-dark: #1e40af;
    --bg-color: #f8fafc;      /* Çok açık gri arka plan */
    --surface: #ffffff;       /* Beyaz kartlar */
    --text-main: #1e293b;     /* Koyu antrasit yazı */
    --text-light: #64748b;    /* Gri açıklama yazısı */
    --border: #e2e8f0;        /* İnce kenarlıklar */
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
}

a { text-decoration: none; color: inherit; transition: 0.2s; }

/* Header */
.site-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo { font-size: 1.5rem; font-weight: 800; color: var(--text-main); letter-spacing: -1px; }
.logo span { color: var(--primary); }

.main-nav a { margin-left: 20px; font-weight: 500; font-size: 0.95rem; color: var(--text-light); }
.main-nav a:hover { color: var(--primary); }
.btn-contact {
    background: var(--text-main); color: #fff !important;
    padding: 8px 16px; border-radius: 6px;
}

/* Layout */
.main-wrapper {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 40px;
    margin-top: 40px;
    margin-bottom: 60px;
    align-items: start;
}

/* Sidebar */
.sidebar {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    position: sticky;
    top: 100px;
}

.sidebar-header {
    background: var(--bg-color);
    padding: 15px 20px;
    font-weight: 700;
    border-bottom: 1px solid var(--border);
    color: var(--text-main);
}

.city-list { list-style: none; max-height: 70vh; overflow-y: auto; }
.city-list li { border-bottom: 1px solid var(--border); }
.city-list li:last-child { border-bottom: none; }
.city-list a {
    display: block; padding: 12px 20px; font-size: 0.9rem;
    color: var(--text-light);
}
.city-list a:hover, .city-list a.active {
    background: #eff6ff; color: var(--primary); font-weight: 600;
    border-left: 3px solid var(--primary);
}

/* Content */
.page-header { margin-bottom: 30px; }
.page-header h1 { font-size: 2rem; font-weight: 800; letter-spacing: -0.5px; }
.page-header small { color: var(--text-light); font-weight: 400; font-size: 1.2rem; }
.page-header p { color: var(--text-light); margin-top: 5px; }

/* Grid Cards */
.media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.media-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: flex-start;
    gap: 15px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.media-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
    border-color: var(--primary);
}

.card-icon {
    width: 50px; height: 50px;
    background: #eff6ff; color: var(--primary);
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 1.2rem;
    flex-shrink: 0;
}

.card-body h3 { font-size: 1rem; margin-bottom: 5px; color: var(--text-main); }

.badge {
    display: inline-block; padding: 4px 8px;
    background: #dbeafe; color: var(--primary-dark);
    font-size: 0.75rem; font-weight: 600; border-radius: 4px;
    margin-bottom: 10px;
}
.badge.gray { background: #f1f5f9; color: var(--text-light); }

.card-details p { font-size: 0.85rem; color: var(--text-light); margin-bottom: 2px; }

/* Welcome Box */
.welcome-box {
    text-align: center; padding: 60px 20px;
    background: var(--surface); border-radius: 16px; border: 1px solid var(--border);
}
.stats { display: flex; justify-content: center; gap: 40px; margin-top: 30px; }
.stat-item strong { display: block; font-size: 2.5rem; color: var(--primary); }

.site-footer {
    text-align: center; padding: 40px 0; color: var(--text-light); font-size: 0.9rem;
    border-top: 1px solid var(--border); margin-top: auto;
}

/* Mobile */
@media (max-width: 768px) {
    .main-wrapper { grid-template-columns: 1fr; margin-top: 20px; }
    .sidebar { position: static; margin-bottom: 30px; }
    .city-list { max-height: 200px; }
}