:root {
  --bg-primary: #F9FAFB;
  --bg-secondary: #FFFFFF;
  --bg-card: #FFFFFF;
  --primary: #1E1B4B;
  --secondary: #6366F1;
  --accent: #06B6D4;
  --text-primary: #1E1B4B;
  --text-secondary: #4B5563;
  --text-muted: #6B7280;
  --border-secondary: rgba(99, 102, 241, 0.12);
  --border-secondary-hover: rgba(6, 182, 212, 0.35);
  --shadow-card: 0 10px 30px -5px rgba(30, 27, 75, 0.08);
  --shadow-card-hover: 0 12px 36px -5px rgba(6, 182, 212, 0.18);
  --shadow-accent: rgba(6, 182, 212, 0.35);
  --nav-height: 72px;
  --transition-smooth: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  --font-heading: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  background:
    radial-gradient(circle at 15% 20%, rgba(99, 102, 241, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 85% 60%, rgba(6, 182, 212, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 50% 80%, rgba(99, 102, 241, 0.04) 0%, transparent 35%),
    #F9FAFB;
  background-attachment: fixed;
}

a {
  color: var(--secondary);
  text-decoration: none;
  transition: color var(--transition-smooth);
}

a:hover {
  color: var(--accent);
}

img {
  max-width: 100%;
  height: auto;
}

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== NAV ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(99, 102, 241, 0.15);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  white-space: nowrap;
  color: var(--primary);
}

.brand-logo {
  height: 48px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
  transition: filter var(--transition-smooth);
}

.brand:hover .brand-logo {
  filter: brightness(1.05);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--primary);
  transition: color var(--transition-smooth);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: linear-gradient(90deg, var(--secondary), var(--accent));
  transition: width var(--transition-smooth);
}

.nav-links a:hover {
  color: var(--accent);
}

.nav-links a:hover::after {
  width: 100%;
}

/* ===== MOBILE MENU BUTTON ===== */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: 10px;
  cursor: pointer;
  transition: all var(--transition-smooth);
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  transform-origin: center;
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition-smooth);
  white-space: nowrap;
  color: var(--primary);
}

.btn-pulse {
  background: var(--accent);
  color: #FFFFFF;
  border: 1px solid rgba(6, 182, 212, 0.4);
  box-shadow: 0 4px 24px rgba(6, 182, 212, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  animation: pulse-glow 3s ease-in-out infinite;
}

.btn-pulse:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 32px rgba(6, 182, 212, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.25);
  color: #FFFFFF;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.6);
  color: var(--secondary);
  border: 1px solid var(--secondary);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--secondary);
  background: rgba(99, 102, 241, 0.08);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.15);
}

@keyframes pulse-glow {
  0%, 100% {
    box-shadow: 0 4px 24px rgba(6, 182, 212, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  }
  50% {
    box-shadow: 0 4px 32px rgba(6, 182, 212, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  }
}

/* ===== HERO ===== */
.hero {
  padding: 7rem 0 5rem;
  text-align: center;
  background: radial-gradient(ellipse at top, rgba(99, 102, 241, 0.05) 0%, transparent 55%);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--primary);
  margin-bottom: 1.5rem;
  letter-spacing: 0.02em;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

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

/* ===== MARQUEE ===== */
.marquee {
  overflow: hidden;
  padding: 1.2rem 0;
  background: var(--primary);
  border-top: 1px solid rgba(99, 102, 241, 0.25);
  border-bottom: 1px solid rgba(99, 102, 241, 0.25);
}

.marquee-track {
  display: flex;
  gap: 3rem;
  width: 200%;
  animation: marquee 28s linear infinite;
}

.marquee-track span {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  color: #F9FAFB;
  letter-spacing: 0.15em;
  white-space: nowrap;
  flex-shrink: 0;
}

.marquee-track span:nth-child(even) {
  color: var(--accent);
}

@keyframes marquee {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

/* ===== SECTIONS ===== */
.section {
  padding: 5.5rem 0;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 700;
  color: var(--primary);
  text-align: center;
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  text-align: center;
  max-width: 560px;
  margin: 0 auto 3rem;
  line-height: 1.8;
}

.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.25), transparent);
  margin: 1.5rem 0;
}

/* ===== GRID ===== */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ===== GLASS CARD ===== */
.glass-card {
  position: relative;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-secondary);
  border-radius: 16px;
  padding: 2rem;
  transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth), transform var(--transition-smooth);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.35), transparent);
  pointer-events: none;
}

.glass-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(6, 182, 212, 0.06) 0%,
    transparent 60%
  );
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.glass-card:hover::after {
  opacity: 1;
}

.glass-card:hover {
  border-color: var(--border-secondary-hover);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.tilt-card {
  transform-style: preserve-3d;
  will-change: transform;
}

.tilt-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ===== SPOTLIGHT ===== */
.spotlight {
  position: relative;
}

.spotlight::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(99, 102, 241, 0.08) 0%,
    transparent 50%
  );
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s ease;
  border-radius: inherit;
}

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

/* ===== STAT ===== */
.stat {
  text-align: center;
  padding: 1rem 0;
}

.stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}

/* ===== BADGE ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--secondary);
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 50px;
  width: fit-content;
  letter-spacing: 0.05em;
}

/* ===== CARD TEXT ===== */
.card-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
  letter-spacing: 0.01em;
}

.card-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== FOOTER ===== */
.footer {
  padding: 2.5rem 0;
  text-align: center;
  background: var(--primary);
  color: #F9FAFB;
  border-top: 1px solid rgba(99, 102, 241, 0.25);
  font-size: 0.9rem;
}

.footer-logo {
  height: 56px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
  margin-bottom: 1rem;
  opacity: 0.9;
  transition: opacity var(--transition-smooth);
}

.footer-logo:hover {
  opacity: 1;
}

/* ===== REVEAL ANIMATION ===== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--reveal-delay, 0s);
  will-change: opacity, transform;
}

.reveal-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== INLINE ICON COLOR OVERRIDES ===== */
.glass-card i.fas.fa-users,
.glass-card i.fas.fa-chess {
  color: var(--secondary) !important;
}

.glass-card i.fas.fa-heart,
.glass-card i.fas.fa-subway {
  color: var(--accent) !important;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 999;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 1.5rem 1.25rem;
    transform: translateY(-16px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.35s ease;
    box-shadow: 0 20px 40px rgba(30, 27, 75, 0.12);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 14px 16px;
    font-size: 18px;
    font-weight: 600;
    color: var(--primary);
    border-radius: 10px;
    transition: background var(--transition-smooth), color var(--transition-smooth);
  }

  .nav-links a:hover {
    background: rgba(99, 102, 241, 0.08);
    color: var(--accent);
  }

  .nav-links a::after {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero {
    padding: 4rem 0 3rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 3rem 0;
  }

  .glass-card {
    padding: 1.5rem;
  }

  .brand-logo {
    height: 40px;
    max-width: 130px;
  }
}

@media (max-width: 480px) {
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .brand-logo {
    height: 32px;
    max-width: 110px;
  }

  .btn {
    font-size: 0.8rem;
    padding: 0.6rem 1.2rem;
  }

  .footer-logo {
    height: 44px;
    max-width: 140px;
  }
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .marquee-track {
    animation: none;
  }

  .btn-pulse {
    animation: none;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ===== MOBILE HAMBURGER MENU (.mobile-menu-toggle) ===== */

/* Masaüstünde gizle */
.mobile-menu-toggle {
  display: none;
}

@media (max-width: 768px) {
  /* Hamburger butonu görünür */
  .mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    background: transparent;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    cursor: pointer;
    z-index: 1001;
  }

  /* Buton içindeki span çizgileri */
  .mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: #1e293b;
    transition: all 0.3s ease;
  }

  /* .active → X (kapat) şekli */
  .mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translateY(7px);
  }

  .mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translateY(-7px);
  }

  /* Navigasyon menü → tam genişlikli panel */
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: #ffffff;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    flex-direction: column;
    align-items: center;
    padding: 20px 0;
    gap: 15px;
    display: none;
    z-index: 1000;
  }

  /* Menü .active → görünür */
  .nav-links.active {
    display: flex;
  }

  /* Mobilde link boyutu ve dokunma alanı */
  .nav-links a {
    font-size: 1.1rem;
    font-weight: 600;
    padding: 14px 24px;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #1e293b;
    border-radius: 10px;
    transition: background 0.3s ease, color 0.3s ease;
  }

  .nav-links a:hover {
    background: rgba(99, 102, 241, 0.08);
    color: var(--accent);
  }
}