:root {
  --bg: #0a1226;
  --bg-alt: #0c1833;
  --primary: #0b63d1;
  --primary-700: #084fa6;
  --primary-500: #2c7be5;
  --text: #e6eefc;
  --text-dim: #b7c5e6;
  --border: #16305f;
  --shadow: 0 10px 30px rgba(7, 24, 62, 0.45);
}

* { box-sizing: border-box; }

html, body {
  padding: 0;
  margin: 0;
}

html { height: 100%; }

body {
  min-height: 100%;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 800px at 80% -10%, rgba(44, 123, 229, 0.25), transparent 60%),
              radial-gradient(1000px 600px at -10% 20%, rgba(11, 99, 209, 0.18), transparent 60%),
              linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  width: 100%;
  max-width: 1040px;
  padding: 0 24px;
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(140%) blur(8px);
  background: linear-gradient(to bottom, rgba(10, 18, 38, 0.85), rgba(10, 18, 38, 0.35) 70%, transparent 100%);
  border-bottom: 1px solid rgba(22, 48, 95, 0.4);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
}

.logo {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-700) 100%);
  color: #fff;
  font-weight: 800;
  text-transform: lowercase;
  box-shadow: var(--shadow);
}

.brand-name {
  font-weight: 700;
  letter-spacing: 0.2px;
  color: var(--text);
}

.hero {
  display: grid;
  place-items: center;
  text-align: center;
  padding: 96px 0 120px;
}

.hero-title {
  margin: 0 0 12px;
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 800;
  text-shadow: 0 8px 30px rgba(12, 24, 51, 0.6);
  animation: fadeUp 800ms ease 100ms both;
}

.hero-subtitle {
  margin: 0 0 6px;
  font-size: clamp(18px, 2.5vw, 22px);
  color: var(--primary-500);
  font-weight: 600;
  letter-spacing: 0.3px;
  animation: fadeUp 900ms ease 150ms both;
}

.hero-text {
  margin: 0 auto 28px;
  max-width: 640px;
  color: var(--text-dim);
  line-height: 1.7;
  animation: fadeUp 1000ms ease 220ms both;
}

.cta-group {
  display: inline-flex;
  gap: 14px;
  align-items: center;
  animation: fadeUp 1050ms ease 260ms both;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 18px;
  border-radius: 12px;
  background: linear-gradient(180deg, var(--primary) 0%, var(--primary-700) 100%);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: transform 160ms ease, filter 160ms ease, box-shadow 160ms ease;
}

.cta-button:hover { transform: translateY(-2px); filter: brightness(1.05); }
.cta-button:active { transform: translateY(0); filter: brightness(0.98); }

.cta-link {
  color: var(--text-dim);
  text-decoration: none;
  padding: 10px 6px;
  border-radius: 8px;
  transition: color 160ms ease, background-color 160ms ease;
}

.cta-link:hover { color: var(--text); background-color: rgba(44, 123, 229, 0.08); }

.site-footer {
  padding: 24px 0 40px;
  border-top: 1px solid rgba(22, 48, 95, 0.35);
}

.footnote {
  margin: 0;
  color: var(--text-dim);
  text-align: center;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Erişilebilirlik: hareketi azalt tercihi */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* Responsive düzen */
@media (max-width: 640px) {
  .cta-group { flex-direction: column; width: 100%; }
  .cta-button { width: 100%; }
}