/**
 * Ana CSS dosyası
 * SEO uyumlu CMS sistemi
 */

/* CSS Variables */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --border-radius: 8px;
    --box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

/* Base Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #fff;
    padding-top: 80px; /* Fixed navbar height */
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

.display-4 {
    font-size: 2.5rem;
    font-weight: 700;
}

.lead {
    font-size: 1.1rem;
    font-weight: 400;
}

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0,0,0,0.1);
    transition: var(--transition);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color) !important;
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    transition: var(--transition);
}

.navbar-nav .nav-link:hover {
    color: var(--primary-color) !important;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-section .container {
    position: relative;
    z-index: 2;
}

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.card-header {
    background: var(--light-color);
    border-bottom: 1px solid rgba(0,0,0,0.1);
    font-weight: 600;
}

.card-title {
    color: var(--dark-color);
    font-weight: 600;
}

/* Post Cards */
.post-card {
    height: 100%;
    transition: var(--transition);
}

.post-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
}

.post-card .card-img-top {
    height: 200px;
    object-fit: cover;
    transition: var(--transition);
}

.post-card:hover .card-img-top {
    transform: scale(1.05);
}

.post-meta {
    font-size: 0.85rem;
    color: var(--secondary-color);
}

.post-stats {
    font-size: 0.85rem;
    color: var(--secondary-color);
}

/* Buttons */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    border: none;
    padding: 0.5rem 1.5rem;
}

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

.btn-primary:hover {
    background: #0056b3;
    border-color: #0056b3;
    transform: translateY(-2px);
}

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

.btn-outline-primary:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* Badges */
.badge {
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius);
}

/* Pagination */
.pagination {
    margin: 0;
}

.page-link {
    border: none;
    color: var(--primary-color);
    padding: 0.75rem 1rem;
    margin: 0 0.25rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.page-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.page-item.active .page-link {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

/* Sidebar */
.sticky-top {
    top: 100px;
}

/* Widget Styles */
.widget {
    margin-bottom: 2rem;
}

.widget-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

/* Footer */
footer {
    background: var(--dark-color) !important;
    color: white;
}

footer h5, footer h6 {
    color: white;
    font-weight: 600;
}

footer a {
    color: #adb5bd;
    transition: var(--transition);
}

footer a:hover {
    color: white;
}

.social-links a {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

/* Back to Top Button */
#backToTop {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

#backToTop:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

/* Form Styles */
.form-control {
    border-radius: var(--border-radius);
    border: 1px solid #dee2e6;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0,123,255,0.25);
}

.input-group .form-control {
    border-right: none;
}

.input-group .btn {
    border-left: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        padding: 60px 0;
        text-align: center;
    }
    
    .display-4 {
        font-size: 2rem;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .post-card .card-img-top {
        height: 150px;
    }
    
    .sticky-top {
        position: static !important;
    }
}

@media (max-width: 576px) {
    body {
        padding-top: 70px;
    }
    
    .hero-section {
        padding: 40px 0;
    }
    
    .display-4 {
        font-size: 1.75rem;
    }
    
    .card-body {
        padding: 1rem;
    }
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Lazy Loading */
img.lazy {
    opacity: 0;
    transition: opacity 0.3s;
}

img.lazy.loaded {
    opacity: 1;
}

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

/* Focus States */
.btn:focus,
.form-control:focus,
.page-link:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .navbar,
    .sidebar,
    footer,
    #backToTop {
        display: none !important;
    }
    
    body {
        padding-top: 0;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #dee2e6;
    }
}

/* Performance Optimizations */
.card,
.btn,
.navbar {
    will-change: transform;
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --light-color: #2d3748;
        --dark-color: #f7fafc;
    }
    
    body {
        background-color: #1a202c;
        color: var(--dark-color);
    }
    
    .card {
        background-color: #2d3748;
        color: var(--dark-color);
    }
    
    .navbar {
        background: rgba(45, 55, 72, 0.95) !important;
    }
}