:root {
  --bg: #0f0f12;
  --bg-card: #16161d;
  --primary: #6366f1;        /* indigo */
  --primary-dark: #4f46e5;
  --accent: #a78bfa;         /* mor-ışıltı */
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --border: #2d2d3d;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  background-image: 
    radial-gradient(circle at 15% 50%, rgba(99,102,241,0.07) 0%, transparent 25%),
    radial-gradient(circle at 85% 30%, rgba(167,139,250,0.06) 0%, transparent 30%);
  background-attachment: fixed;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ────────────────────────────────────────────────
   Header & Navigation
───────────────────────────────────────────────── */

header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(15,15,18,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  font-family: 'Orbitron', sans-serif;
  font-size: 2.1rem;
  font-weight: 900;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -1px;
}

.nav-links {
  display: flex;
  gap: 36px;
  font-weight: 500;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: all 0.25s ease;
  font-size: 0.98rem;
}

.nav-links a:hover {
  color: white;
  text-shadow: 0 0 12px rgba(99,102,241,0.5);
}

/* ────────────────────────────────────────────────
   Buttons
───────────────────────────────────────────────── */

.btn {
  background: linear-gradient(145deg, var(--primary), var(--primary-dark));
  color: white;
  border: none;
  padding: 12px 28px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(99,102,241,0.35);
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background: rgba(99,102,241,0.1);
}

/* ────────────────────────────────────────────────
   Hero Section
───────────────────────────────────────────────── */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
}

.hero-content {
  max-width: 780px;
}

.hero h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(3.8rem, 12vw, 7.2rem);
  font-weight: 900;
  line-height: 0.92;
  margin-bottom: 1.4rem;
  background: linear-gradient(90deg, #c4b5fd, #a78bfa, #818cf8, #6366f1);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% auto;
  animation: shine 8s linear infinite;
}

@keyframes shine {
  to { background-position: 200% center; }
}

.hero p {
  font-size: 1.38rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  max-width: 560px;
}

.stats {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  margin-top: 3rem;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 0.6rem;
}

/* ────────────────────────────────────────────────
   Features Section
───────────────────────────────────────────────── */

.features {
  padding: 140px 0 100px;
  background: linear-gradient(to bottom, transparent, rgba(30,30,45,0.4), transparent);
}

.section-title {
  text-align: center;
  font-family: 'Orbitron', sans-serif;
  font-size: 3.2rem;
  margin-bottom: 4rem;
  background: linear-gradient(90deg, white, var(--accent), white);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
  transition: all 0.35s ease;
  backdrop-filter: blur(4px);
}

.card:hover {
  transform: translateY(-12px);
  border-color: var(--primary);
  box-shadow: 0 20px 60px rgba(99,102,241,0.18);
}

.card h3 {
  font-size: 1.6rem;
  margin-bottom: 1.2rem;
  color: var(--accent);
}

/* ────────────────────────────────────────────────
   Footer
───────────────────────────────────────────────── */

footer {
  padding: 80px 0 40px;
  text-align: center;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

/* ────────────────────────────────────────────────
   Responsive Adjustments
───────────────────────────────────────────────── */

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero h1 {
    font-size: 4.8rem;
  }

  .stats {
    gap: 32px;
    justify-content: center;
  }
}