:root {
  --navy: #0b2f4a;
  --navy-dark: #071f31;
  --teal: #2dd4bf;
  --text: #1e293b;
  --muted: #64748b;
  --bg: #f4f8fb;
  --card: #ffffff;
}

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: Inter, system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  position: relative;
  overflow-x: hidden;
}

/* Watermark: tüm sayfaya döşenen, sabit, çok düşük opaklıkta marka deseni */
.watermark {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  user-select: none;
  background-image: url("assets/watermark.svg");
  background-repeat: repeat;
  background-size: 360px 220px;
  opacity: 0.045;
}

.site-header,
.hero,
.site-footer {
  position: relative;
  z-index: 1;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 32px;
}

.lang-switch {
  display: flex;
  gap: 4px;
  padding: 4px;
  border-radius: 10px;
  background: rgba(11, 47, 74, 0.06);
}

.lang-switch a {
  padding: 6px 12px;
  border-radius: 7px;
  font-family: Montserrat, sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-decoration: none;
}

.lang-switch a:hover { color: var(--navy); }

.lang-switch a[aria-current="page"] {
  background: var(--card);
  color: var(--navy);
  box-shadow: 0 1px 2px rgba(11, 47, 74, 0.12);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--navy);
  font-family: Montserrat, sans-serif;
  font-weight: 500;
  font-size: 1.25rem;
  letter-spacing: 0.12em;
}

.brand strong { font-weight: 800; }

.hero {
  flex: 1;
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 40px 24px 64px;
  text-align: center;
}

/* Büyük, soluk amblem: hero arkasında ikinci watermark katmanı */
.hero-emblem {
  position: absolute;
  top: 0;
  left: 50%;
  width: min(520px, 90vw);
  transform: translateX(-50%);
  opacity: 0.06;
  z-index: -1;
  pointer-events: none;
}

.badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(45, 212, 191, 0.15);
  color: #0f766e;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1 {
  margin: 20px 0 16px;
  font-family: Montserrat, sans-serif;
  font-weight: 800;
  font-size: clamp(2rem, 6vw, 3.5rem);
  line-height: 1.1;
  color: var(--navy);
}

h1 em {
  font-style: normal;
  color: #0f9d8c;
}

.lead {
  max-width: 620px;
  margin: 0 auto 40px;
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--muted);
}

.features {
  list-style: none;
  padding: 0;
  margin: 0 0 40px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  text-align: left;
}

.features li {
  background: var(--card);
  border: 1px solid #e2e8f0;
  border-top: 4px solid var(--teal);
  border-radius: 12px;
  padding: 20px;
}

.features h2 {
  margin: 0 0 6px;
  font-family: Montserrat, sans-serif;
  font-size: 1.05rem;
  color: var(--navy);
}

.features p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

.cta {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 10px;
  background: var(--navy);
  color: #fff;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.2s;
}

.cta:hover { background: var(--navy-dark); }

.site-footer {
  padding: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}

@media (max-width: 600px) {
  .site-header { padding: 16px; }
  .brand { font-size: 1rem; gap: 8px; }
  .hero { padding: 24px 16px 48px; }
}