/* =================================================================
   TechWave — Modern Premium Tema
   ================================================================= */

/* ---------- Reset & Temel ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text: #0f172a;
  --text-secondary: #64748b;
  --text-light: #94a3b8;
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #eef2ff;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --success: #10b981;
  --border: #e2e8f0;
  --card-shadow: 0 1px 3px rgba(0,0,0,.04), 0 1px 2px rgba(0,0,0,.06);
  --card-shadow-hover: 0 10px 25px rgba(0,0,0,.08), 0 4px 10px rgba(0,0,0,.04);
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --max-width: 1280px;
  --sidebar-width: 320px;
  --ad-bg: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
  --ad-border: #c7d2fe;
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
  --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-light: #64748b;
  --primary: #818cf8;
  --primary-hover: #a5b4fc;
  --primary-light: #1e1b4b;
  --border: #334155;
  --card-shadow: 0 1px 3px rgba(0,0,0,.2);
  --card-shadow-hover: 0 10px 25px rgba(0,0,0,.3);
  --ad-bg: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
  --ad-border: #4338ca;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: var(--transition);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-hover); }

img { max-width: 100%; height: auto; border-radius: var(--radius); }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--text-light); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* ---------- Header ---------- */
.site-header {
  background: rgba(255,255,255,.85);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}

[data-theme="dark"] .site-header {
  background: rgba(15,23,42,.85);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.5px;
}

.logo span { 
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

nav { display: flex; align-items: center; gap: 32px; }

nav a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: .95rem;
  transition: var(--transition);
  position: relative;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition);
  border-radius: 1px;
}

nav a:hover::after, nav a.active::after { width: 100%; }
nav a:hover, nav a.active { color: var(--primary); }

.theme-toggle {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 42px;
  height: 42px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: var(--transition);
}

.theme-toggle:hover { 
  border-color: var(--primary); 
  background: var(--primary-light);
  transform: rotate(20deg);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text);
  padding: 8px;
}

/* ---------- Hero ---------- */
.hero {
  background: var(--gradient-primary);
  color: #fff;
  padding: 80px 0 70px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,.1) 0%, transparent 60%);
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

.hero h1 { 
  font-size: 2.8rem; 
  font-weight: 800; 
  margin-bottom: 16px; 
  letter-spacing: -1px;
  position: relative;
  text-shadow: 0 2px 10px rgba(0,0,0,.1);
}

.hero p { 
  font-size: 1.2rem; 
  opacity: .9; 
  max-width: 650px; 
  margin: 0 auto; 
  position: relative;
  line-height: 1.8;
}

/* ---------- Badge ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,.15);
  backdrop-filter: blur(10px);
  padding: 8px 16px;
  border-radius: 30px;
  font-size: .85rem;
  font-weight: 500;
  margin-bottom: 20px;
  border: 1px solid rgba(255,255,255,.2);
  position: relative;
}

/* ---------- İçerik Düzeni ---------- */
.content-layout {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: 40px;
  padding: 40px 0;
}

/* ---------- Kartlar ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--card-shadow-hover);
  border-color: transparent;
}

.card:hover::before { opacity: 1; }

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--bg-secondary);
}

.card-img img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

/* ---------- Makale Hero Görsel ---------- */
.article-hero {
  position: relative;
  width: 100%;
  height: 450px;
  overflow: hidden;
  margin-bottom: -50px;
}

.article-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.article-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.85) 0%, rgba(0,0,0,.2) 50%, transparent 100%);
}

.article-hero-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 40px;
  color: #fff;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
}

.article-hero-content h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin: 14px 0;
  line-height: 1.3;
  text-shadow: 0 2px 12px rgba(0,0,0,.3);
  letter-spacing: -0.5px;
}

.article-hero-content .card-tag {
  background: rgba(255,255,255,.95);
  color: var(--primary);
  font-weight: 600;
}

.article-hero-content .article-meta {
  color: rgba(255,255,255,.9);
}

/* Görsel Telif */
.image-credit {
  margin-top: 30px;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  font-size: .8rem;
  color: var(--text-light);
  text-align: center;
  border: 1px solid var(--border);
}

.card-body { padding: 24px; }

.card-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: .75rem;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.4;
  letter-spacing: -0.3px;
}

.card-title a { color: var(--text); }
.card-title a:hover { color: var(--primary); }

.card-excerpt {
  color: var(--text-secondary);
  font-size: .92rem;
  line-height: 1.7;
  margin-bottom: 18px;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: .82rem;
  color: var(--text-light);
}

.card-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ---------- Makale Sayfası ---------- */
.article-header { padding: 40px 0 20px; }

.article-header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--text-secondary);
  font-size: .9rem;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-content {
  max-width: 780px;
  margin: 0 auto;
  padding-bottom: 50px;
}

.article-content h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 40px 0 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border);
  letter-spacing: -0.3px;
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 30px 0 14px;
  color: var(--primary);
}

.article-content p {
  margin-bottom: 20px;
  font-size: 1.08rem;
  color: var(--text);
  line-height: 1.8;
}

.article-content ul, .article-content ol {
  margin: 18px 0;
  padding-left: 28px;
}

.article-content li {
  margin-bottom: 10px;
  font-size: 1.04rem;
  line-height: 1.7;
}

.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: var(--primary-light);
  padding: 20px 24px;
  margin: 28px 0;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  color: var(--text-secondary);
  font-size: 1.02rem;
}

.article-content code {
  background: var(--bg-tertiary);
  padding: 3px 8px;
  border-radius: 6px;
  font-size: .92rem;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  border: 1px solid var(--border);
}

.article-content pre {
  background: var(--gradient-dark);
  color: #e2e8f0;
  padding: 24px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid var(--border);
}

.article-content pre code {
  background: none;
  padding: 0;
  color: inherit;
  border: none;
  font-size: .9rem;
}

/* ---------- Sidebar ---------- */
.sidebar { display: flex; flex-direction: column; gap: 28px; }

.sidebar-widget {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
}

.sidebar-widget:hover {
  box-shadow: var(--card-shadow-hover);
}

.sidebar-widget h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.popular-list { list-style: none; }

.popular-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.popular-list li:hover { padding-left: 8px; }
.popular-list li:last-child { border-bottom: none; }

.popular-list a {
  color: var(--text);
  font-weight: 500;
  font-size: .92rem;
  display: block;
  transition: var(--transition);
}

.popular-list a:hover { color: var(--primary); }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; }

.tag {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  padding: 6px 16px;
  border-radius: 24px;
  font-size: .85rem;
  color: var(--text-secondary);
  transition: var(--transition);
  font-weight: 500;
}

.tag:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
}

/* ---------- Kategori Sayfası ---------- */
.category-header {
  padding: 50px 0 30px;
  text-align: center;
}

.category-header h1 { font-size: 2.2rem; font-weight: 800; letter-spacing: -0.5px; }
.category-header p { color: var(--text-secondary); margin-top: 10px; font-size: 1.05rem; }

/* ---------- İletişim ---------- */
.contact-form {
  max-width: 640px;
  margin: 0 auto;
  padding: 50px 0;
}

.form-group { margin-bottom: 24px; }

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: .95rem;
  color: var(--text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  background: var(--bg);
  color: var(--text);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-light);
}

.form-group textarea { min-height: 160px; resize: vertical; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-primary);
  color: #fff;
  padding: 14px 32px;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(99,102,241,.3);
}

.btn:hover { 
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99,102,241,.4);
  color: #fff;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 50px 0 24px;
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 50px;
  margin-bottom: 40px;
}

.footer-about p { color: var(--text-secondary); font-size: .92rem; margin-top: 14px; line-height: 1.7; }

.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: var(--text-secondary); font-size: .92rem; transition: var(--transition); }
.footer-links a:hover { color: var(--primary); padding-left: 4px; }

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--text-light);
  font-size: .85rem;
}

/* ---------- Ad Slot ---------- */
.ad-slot {
  background: var(--ad-bg);
  border: 1px dashed var(--ad-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 28px 0;
  border-radius: var(--radius);
  overflow: hidden;
}

.ad-slot-728 { width: 728px; height: 90px; max-width: 100%; margin-left: auto; margin-right: auto; }
.ad-slot-300 { width: 300px; height: 250px; }
.ad-slot-336 { width: 336px; height: 280px; margin-left: auto; margin-right: auto; }
.ad-slot-300x600 { width: 300px; height: 600px; }

/* ---------- Animasyonlar ---------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.card { animation: fadeInUp 0.5s ease forwards; }
.card:nth-child(2) { animation-delay: 0.1s; }
.card:nth-child(3) { animation-delay: 0.2s; }
.card:nth-child(4) { animation-delay: 0.3s; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .content-layout {
    grid-template-columns: 1fr;
  }
  .sidebar { order: -1; display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
}

@media (max-width: 768px) {
  .hero { padding: 60px 0 50px; }
  .hero h1 { font-size: 1.8rem; }
  .hero p { font-size: 1rem; }
  .article-header h1 { font-size: 1.6rem; }
  .article-hero { height: 300px; }
  .article-hero-content { padding: 24px; }
  .article-hero-content h1 { font-size: 1.5rem; }
  nav { display: none; }
  nav.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 24px;
    gap: 18px;
    box-shadow: 0 10px 30px rgba(0,0,0,.1);
  }
  .mobile-menu-btn { display: block; }
  .card-grid { grid-template-columns: 1fr; }
  .sidebar { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .ad-slot-728 { width: 100%; height: auto; min-height: 90px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 1.5rem; }
  .card-body { padding: 18px; }
}

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }