/* ═══════════════════════════════════════════════════════════
   Boğaziçi — Premium Corporate Website Stylesheet
   ═══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --primary: #0052CC;
  --primary-dark: #003D99;
  --primary-light: #4C9AFF;
  --accent: #00B8D9;
  --accent-glow: rgba(0, 184, 217, 0.15);
  --dark: #0A1628;
  --dark-card: #111D33;
  --dark-surface: #152238;
  --text: #E8ECF1;
  --text-muted: #8899AA;
  --text-bright: #FFFFFF;
  --border: rgba(255, 255, 255, 0.06);
  --gradient-hero: linear-gradient(135deg, #0A1628 0%, #0D1F3C 50%, #0A1628 100%);
  --gradient-primary: linear-gradient(135deg, #0052CC, #00B8D9);
  --gradient-card: linear-gradient(180deg, rgba(21, 34, 56, 0.8) 0%, rgba(10, 22, 40, 0.95) 100%);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(0, 82, 204, 0.15);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--dark);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

img { max-width: 100%; display: block; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ─── NAVBAR ─── */
.navbar {
  position: fixed; top: 0; width: 100%; z-index: 1000;
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.navbar.scrolled { background: rgba(10, 22, 40, 0.95); box-shadow: var(--shadow-lg); }

.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1200px; margin: 0 auto; padding: 0 24px; height: 72px;
}

.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.5rem; font-weight: 800; color: var(--text-bright);
}
.nav-logo span { background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

.nav-links { display: flex; gap: 32px; list-style: none; }
.nav-links a {
  color: var(--text-muted); font-weight: 500; font-size: 0.95rem;
  position: relative; padding: 4px 0;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -2px; left: 0;
  width: 0; height: 2px; background: var(--gradient-primary);
  transition: var(--transition);
}
.nav-links a:hover { color: var(--text-bright); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active { color: var(--text-bright); }
.nav-links a.active::after { width: 100%; }

.nav-cta {
  background: var(--gradient-primary); color: #fff !important;
  padding: 10px 24px; border-radius: 50px; font-weight: 600;
  font-size: 0.9rem; transition: var(--transition);
  border: none; cursor: pointer;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0, 82, 204, 0.4); }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span {
  display: block; width: 24px; height: 2px; background: var(--text);
  margin: 6px 0; transition: var(--transition);
}

/* ─── HERO ─── */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  background: var(--gradient-hero);
  position: relative; overflow: hidden;
  padding-top: 72px;
}
.hero::before {
  content: ''; position: absolute; top: -50%; right: -30%;
  width: 800px; height: 800px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 82, 204, 0.08) 0%, transparent 70%);
  animation: float 20s ease-in-out infinite;
}
.hero::after {
  content: ''; position: absolute; bottom: -30%; left: -20%;
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 184, 217, 0.06) 0%, transparent 70%);
  animation: float 25s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, -30px); }
}

.hero-content {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(0, 82, 204, 0.12); border: 1px solid rgba(0, 82, 204, 0.25);
  padding: 8px 16px; border-radius: 50px; font-size: 0.85rem;
  color: var(--primary-light); margin-bottom: 24px;
  animation: fadeInUp 0.6s ease;
}
.hero-badge::before { content: '✦'; }

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 3.8rem);
  font-weight: 800; line-height: 1.15;
  color: var(--text-bright); margin-bottom: 20px;
  animation: fadeInUp 0.6s ease 0.1s both;
}
.hero h1 .gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.15rem; color: var(--text-muted);
  max-width: 540px; margin-bottom: 36px;
  animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-buttons {
  display: flex; gap: 16px; flex-wrap: wrap;
  animation: fadeInUp 0.6s ease 0.3s both;
}

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: 50px; font-weight: 600;
  font-size: 1rem; cursor: pointer; transition: var(--transition);
  border: none; font-family: inherit;
}
.btn-primary {
  background: var(--gradient-primary); color: #fff;
  box-shadow: 0 4px 20px rgba(0, 82, 204, 0.3);
}
.btn-primary:hover {
  transform: translateY(-3px); color: #fff;
  box-shadow: 0 8px 30px rgba(0, 82, 204, 0.5);
}
.btn-outline {
  background: transparent; color: var(--text-bright);
  border: 1px solid rgba(255,255,255,0.15);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.05); color: var(--text-bright);
  border-color: rgba(255,255,255,0.3);
}

.hero-visual {
  position: relative; display: flex; justify-content: center;
  animation: fadeInUp 0.8s ease 0.4s both;
}
.hero-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px; width: 100%;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}
.hero-card .stat-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
}
.hero-stat { text-align: center; padding: 20px; }
.hero-stat .number {
  font-size: 2.5rem; font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-stat .label { color: var(--text-muted); font-size: 0.9rem; margin-top: 4px; }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── SECTIONS ─── */
section { padding: 100px 0; position: relative; }
section:nth-child(even) { background: var(--dark-surface); }

.section-header {
  text-align: center; margin-bottom: 64px;
}
.section-badge {
  display: inline-block; padding: 6px 16px; border-radius: 50px;
  font-size: 0.8rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 1.5px; margin-bottom: 16px;
  background: rgba(0, 82, 204, 0.1); color: var(--primary-light);
  border: 1px solid rgba(0, 82, 204, 0.2);
}
.section-header h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700; color: var(--text-bright);
  margin-bottom: 16px;
}
.section-header p {
  font-size: 1.1rem; color: var(--text-muted);
  max-width: 600px; margin: 0 auto;
}

/* ─── CARDS ─── */
.card-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px; transition: var(--transition);
  position: relative; overflow: hidden;
}
.card::before {
  content: ''; position: absolute; top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0); transform-origin: left;
  transition: var(--transition);
}
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 82, 204, 0.2);
  box-shadow: var(--shadow-glow);
}
.card:hover::before { transform: scaleX(1); }

.card-icon {
  width: 56px; height: 56px; border-radius: 14px;
  background: rgba(0, 82, 204, 0.1);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; margin-bottom: 20px;
}

.card h3 {
  font-size: 1.25rem; font-weight: 700;
  color: var(--text-bright); margin-bottom: 12px;
}
.card p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; }

.card-link {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 20px; font-weight: 600; font-size: 0.9rem;
  color: var(--primary-light);
}
.card-link:hover { gap: 10px; }

/* ─── STATS ─── */
.stats-section {
  background: var(--gradient-hero);
  padding: 80px 0;
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px;
}
.stat-item {
  text-align: center; padding: 32px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}
.stat-item:hover {
  background: rgba(0, 82, 204, 0.06);
  border-color: rgba(0, 82, 204, 0.2);
  transform: translateY(-4px);
}
.stat-number {
  font-size: 3rem; font-weight: 800; line-height: 1;
  background: var(--gradient-primary);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}
.stat-label { color: var(--text-muted); font-size: 1rem; }

/* ─── PRODUCT GRID ─── */
.product-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.product-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden; transition: var(--transition);
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}
.product-image {
  height: 200px; background: linear-gradient(135deg, var(--dark-surface), var(--dark-card));
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem; color: var(--primary-light);
  border-bottom: 1px solid var(--border);
}
.product-info { padding: 24px; }
.product-info h3 { font-size: 1.1rem; font-weight: 700; color: var(--text-bright); margin-bottom: 8px; }
.product-info p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 16px; }
.product-tag {
  display: inline-block; padding: 4px 12px; border-radius: 50px;
  font-size: 0.75rem; font-weight: 600;
  background: rgba(0, 184, 217, 0.1); color: var(--accent);
  border: 1px solid rgba(0, 184, 217, 0.2);
}

/* ─── FEATURES LIST ─── */
.features-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
  align-items: center;
}
.features-list { list-style: none; }
.features-list li {
  display: flex; gap: 16px; padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.features-list li:last-child { border-bottom: none; }
.feature-check {
  width: 32px; height: 32px; min-width: 32px;
  border-radius: 50%; background: rgba(0, 82, 204, 0.1);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary-light); font-size: 0.9rem;
}
.feature-text h4 { font-weight: 600; color: var(--text-bright); margin-bottom: 4px; }
.feature-text p { font-size: 0.9rem; color: var(--text-muted); }

/* ─── CTA SECTION ─── */
.cta-section {
  padding: 100px 0; text-align: center;
  background: linear-gradient(135deg, rgba(0, 82, 204, 0.08), rgba(0, 184, 217, 0.05));
}
.cta-section h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700; color: var(--text-bright); margin-bottom: 16px;
}
.cta-section p {
  font-size: 1.1rem; color: var(--text-muted);
  max-width: 500px; margin: 0 auto 36px;
}

/* ─── CONTACT FORM ─── */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-weight: 500; color: var(--text);
  margin-bottom: 6px; font-size: 0.9rem;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%; padding: 14px 18px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text);
  font-family: inherit; font-size: 1rem;
  transition: var(--transition);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 82, 204, 0.15);
}
.form-group textarea { min-height: 120px; resize: vertical; }

.contact-info-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
}
.contact-info-item {
  display: flex; gap: 16px; padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
.contact-info-item:last-child { border-bottom: none; }
.contact-info-icon {
  width: 48px; height: 48px; min-width: 48px;
  border-radius: 12px; background: rgba(0, 82, 204, 0.1);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
}
.contact-info-text h4 { font-weight: 600; color: var(--text-bright); margin-bottom: 4px; }
.contact-info-text p { font-size: 0.9rem; color: var(--text-muted); }

/* ─── FOOTER ─── */
.footer {
  background: var(--dark);
  border-top: 1px solid var(--border);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px; margin-bottom: 40px;
}
.footer-brand h3 {
  font-size: 1.5rem; font-weight: 800; margin-bottom: 12px;
}
.footer-brand h3 span {
  background: var(--gradient-primary);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.footer-brand p { color: var(--text-muted); font-size: 0.9rem; max-width: 300px; }
.footer-col h4 {
  font-size: 0.95rem; font-weight: 600; color: var(--text-bright);
  margin-bottom: 16px;
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { color: var(--text-muted); font-size: 0.9rem; }
.footer-col ul a:hover { color: var(--text-bright); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px; text-align: center;
  color: var(--text-muted); font-size: 0.85rem;
}

/* ─── PAGE HEADER ─── */
.page-header {
  padding: 140px 0 60px;
  background: var(--gradient-hero);
  text-align: center;
}
.page-header h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800; color: var(--text-bright);
  margin-bottom: 16px;
}
.page-header p {
  font-size: 1.1rem; color: var(--text-muted);
  max-width: 600px; margin: 0 auto;
}
.breadcrumb {
  display: flex; justify-content: center; gap: 8px;
  margin-bottom: 24px; font-size: 0.9rem; color: var(--text-muted);
}
.breadcrumb a { color: var(--primary-light); }
.breadcrumb span { color: var(--text-muted); }

/* ─── ABOUT PAGE ─── */
.about-content {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.about-text h3 { font-size: 1.5rem; font-weight: 700; color: var(--text-bright); margin-bottom: 16px; }
.about-text p { color: var(--text-muted); margin-bottom: 16px; }
.about-visual {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 60px; text-align: center;
}
.about-visual .big-icon { font-size: 6rem; margin-bottom: 16px; }
.about-visual p { color: var(--text-muted); font-size: 1.1rem; }

.timeline { max-width: 700px; margin: 0 auto; }
.timeline-item {
  display: flex; gap: 24px; padding: 24px 0;
  border-bottom: 1px solid var(--border);
}
.timeline-year {
  min-width: 80px; font-size: 1.2rem; font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.timeline-content h4 { font-weight: 600; color: var(--text-bright); margin-bottom: 4px; }
.timeline-content p { color: var(--text-muted); font-size: 0.9rem; }

/* ─── RESPONSIVE ─── */
@media (max-width: 992px) {
  .hero-content { grid-template-columns: 1fr; text-align: center; }
  .hero p { margin-left: auto; margin-right: auto; }
  .hero-buttons { justify-content: center; }
  .hero-visual { margin-top: 40px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .about-content { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: block; }
  .nav-links.active {
    display: flex; flex-direction: column;
    position: absolute; top: 72px; left: 0; width: 100%;
    background: rgba(10, 22, 40, 0.98);
    padding: 24px; gap: 16px;
    border-bottom: 1px solid var(--border);
  }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .card-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  section { padding: 60px 0; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 2rem; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat-number { font-size: 2.2rem; }
  .hero-buttons { flex-direction: column; align-items: center; }
}