/**
 * Modern 2026 Tasarım CSS
 * Dexter Bilisim Blog - Modern ve Responsive
 */

/* ==========================================
   CSS Variables (Custom Properties)
   ========================================== */
:root {
    /* Ana Renkler */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    
    --color-secondary: #8b5cf6;
    --color-accent: #ec4899;
    
    /* Nötr Renkler */
    --color-bg: #ffffff;
    --color-bg-secondary: #f8fafc;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    
    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    
    /* Dark Mode Renkler */
    --color-dark-bg: #0f172a;
    --color-dark-bg-secondary: #1e293b;
    --color-dark-surface: #334155;
    --color-dark-border: #475569;
    
    --color-dark-text: #f1f5f9;
    --color-dark-text-secondary: #cbd5e1;
    --color-dark-text-muted: #94a3b8;
    
    /* Tipografi */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Plus Jakarta Sans', 'Inter', sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;
    
    --font-size-xs: 0.75rem;      /* 12px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-base: 1rem;       /* 16px */
    --font-size-lg: 1.125rem;     /* 18px */
    --font-size-xl: 1.25rem;      /* 20px */
    --font-size-2xl: 1.5rem;      /* 24px */
    --font-size-3xl: 1.875rem;    /* 30px */
    --font-size-4xl: 2.25rem;     /* 36px */
    --font-size-5xl: 3rem;        /* 48px */
    
    /* Spacing */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */
    
    /* Border Radius */
    --radius-sm: 0.375rem;   /* 6px */
    --radius-md: 0.5rem;     /* 8px */
    --radius-lg: 0.75rem;    /* 12px */
    --radius-xl: 1rem;       /* 16px */
    --radius-2xl: 1.5rem;    /* 24px */
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Dark Mode */
[data-theme="dark"] {
    --color-bg: var(--color-dark-bg);
    --color-bg-secondary: var(--color-dark-bg-secondary);
    --color-surface: var(--color-dark-surface);
    --color-border: var(--color-dark-border);
    
    --color-text: var(--color-dark-text);
    --color-text-secondary: var(--color-dark-text-secondary);
    --color-text-muted: var(--color-dark-text-muted);
}

/* ==========================================
   Modern Layout Grid System
   ========================================== */
.modern-grid {
    display: grid;
    gap: var(--space-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

/* Responsive Grid */
@media (min-width: 640px) {
    .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .sm\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
    .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* ==========================================
   Modern Card Design
   ========================================== */
.modern-card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--color-border);
}

.modern-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.modern-card-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    aspect-ratio: 16 / 9;
}

.modern-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.modern-card:hover .modern-card-image img {
    transform: scale(1.05);
}

/* ==========================================
   Modern Typography
   ========================================== */
.modern-heading {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: var(--space-4);
}

.modern-h1 {
    font-size: clamp(2rem, 5vw, var(--font-size-5xl));
    letter-spacing: -0.025em;
}

.modern-h2 {
    font-size: clamp(1.5rem, 4vw, var(--font-size-4xl));
    letter-spacing: -0.02em;
}

.modern-h3 {
    font-size: clamp(1.25rem, 3vw, var(--font-size-3xl));
}

.modern-text {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text-secondary);
}

.modern-text-gradient {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================
   Modern Buttons
   ========================================== */
.modern-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    line-height: 1;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

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

.modern-btn-primary:hover {
    background: var(--color-primary-dark);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.modern-btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

.modern-btn-ghost {
    background: transparent;
    color: var(--color-text);
}

.modern-btn-ghost:hover {
    background: var(--color-bg-secondary);
}

/* ==========================================
   Modern Badge & Pills
   ========================================== */
.modern-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
}

.modern-category-badge {
    position: absolute;
    top: var(--space-4);
    left: var(--space-4);
    padding: var(--space-2) var(--space-4);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 700;
    color: var(--color-primary);
    z-index: 10;
}

/* ==========================================
   Modern Post Grid
   ========================================== */
.modern-post-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-8);
    padding: var(--space-8) 0;
}

.modern-post-item {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
    border: 1px solid var(--color-border);
}

.modern-post-item:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-6px);
}

.modern-post-thumbnail {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.modern-post-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.modern-post-item:hover .modern-post-thumbnail img {
    transform: scale(1.1);
}

.modern-post-content {
    padding: var(--space-6);
}

.modern-post-meta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.modern-post-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: var(--space-3);
}

.modern-post-title a {
    color: var(--color-text);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.modern-post-title a:hover {
    color: var(--color-primary);
}

.modern-post-excerpt {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-4);
}

/* ==========================================
   Modern Social Share
   ========================================== */
.modern-social-share {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
}

.modern-social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    text-decoration: none;
    color: white;
}

.modern-social-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.modern-social-facebook { background: #1877f2; }
.modern-social-twitter { background: #1da1f2; }
.modern-social-whatsapp { background: #25d366; }
.modern-social-linkedin { background: #0077b5; }
.modern-social-telegram { background: #0088cc; }

/* ==========================================
   Modern Navigation
   ========================================== */
.modern-nav {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.modern-nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-6);
    max-width: 1200px;
    margin: 0 auto;
}

/* ==========================================
   Modern Dark Mode Toggle
   ========================================== */
.dark-mode-toggle {
    position: relative;
    width: 60px;
    height: 32px;
    background: var(--color-border);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: background var(--transition-base);
}

.dark-mode-toggle::before {
    content: '';
    position: absolute;
    top: 4px;
    left: 4px;
    width: 24px;
    height: 24px;
    background: white;
    border-radius: 50%;
    transition: transform var(--transition-base);
}

[data-theme="dark"] .dark-mode-toggle {
    background: var(--color-primary);
}

[data-theme="dark"] .dark-mode-toggle::before {
    transform: translateX(28px);
}

/* ==========================================
   Modern Animations
   ========================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

.animate-slide-in-right {
    animation: slideInRight 0.6s ease-out forwards;
}

/* Stagger animations */
.stagger-animation > * {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

.stagger-animation > *:nth-child(1) { animation-delay: 0.1s; }
.stagger-animation > *:nth-child(2) { animation-delay: 0.2s; }
.stagger-animation > *:nth-child(3) { animation-delay: 0.3s; }
.stagger-animation > *:nth-child(4) { animation-delay: 0.4s; }
.stagger-animation > *:nth-child(5) { animation-delay: 0.5s; }

/* ==========================================
   Responsive Utilities
   ========================================== */
@media (max-width: 768px) {
    .modern-post-grid {
        grid-template-columns: 1fr;
    }
    
    .modern-h1 {
        font-size: var(--font-size-3xl);
    }
}

/* ==========================================
   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-width: 0;
}

/* Focus states */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}