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

:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --dark: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg: #f8fafc;
  --card: #ffffff;
  --radius: 14px;
  --shadow: 0 12px 40px rgba(15, 23, 42, 0.1);
  --font: Inter, "Segoe UI", system-ui, sans-serif;
  --max: 1120px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--dark);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.wrap { width: min(var(--max), calc(100% - 40px)); margin-inline: auto; }

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #ffffff;
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 104px;
  gap: 24px;
}
.brand { display: flex; align-items: center; flex-shrink: 0; }
.brand img { height: 80px; width: auto; display: block; }
.nav { display: flex; gap: 28px; flex-wrap: nowrap; }
.nav a { color: var(--muted); font-size: 0.9rem; font-weight: 500; }
.nav a:hover { color: var(--dark); }
.header-cta {
  color: #fff;
  font-weight: 600;
  font-size: 0.88rem;
  white-space: nowrap;
  flex-shrink: 0;
  background: var(--primary);
  padding: 10px 16px;
  border-radius: 8px;
}
.header-cta:hover { background: var(--primary-hover); }

/* Hero */
.hero {
  position: relative;
  min-height: 78vh;
  display: grid;
  align-items: end;
  color: #fff;
  background: #0f172a url("../images/hero-insaat.jpg") center / cover no-repeat;
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.35) 0%, rgba(15, 23, 42, 0.82) 100%);
}
.hero-inner { position: relative; z-index: 1; padding: 72px 0 80px; }
.kicker {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 600;
  color: #93c5fd;
  margin-bottom: 14px;
}
.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  max-width: 16ch;
}
.hero p {
  margin: 0;
  max-width: 42rem;
  color: #e2e8f0;
  font-size: 1.08rem;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}
.hero-meta strong { display: block; font-size: 0.95rem; }
.hero-meta span { color: #94a3b8; font-size: 0.82rem; }

/* Sections */
section { padding: 88px 0; }
.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head h2 {
  margin: 0 0 12px;
  font-size: clamp(1.6rem, 3vw, 2.15rem);
  letter-spacing: -0.03em;
  line-height: 1.2;
}
.section-head p { margin: 0; color: var(--muted); }

.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.split img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.split.reverse { grid-template-columns: 0.95fr 1.05fr; }
.split.reverse img { order: -1; }
.lead { font-size: 1.05rem; color: #334155; }

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}
.card img { height: 190px; width: 100%; object-fit: cover; }
.card-body { padding: 22px 22px 26px; }
.card h3 { margin: 0 0 8px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.94rem; }

.modules {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.mod {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px;
}
.mod-no {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--primary);
  margin-bottom: 8px;
}
.mod h3 { margin: 0 0 6px; font-size: 1rem; }
.mod p { margin: 0; color: var(--muted); font-size: 0.9rem; }

.band {
  position: relative;
  color: #fff;
  background: #0f172a url("../images/proje-kompleks.jpg") center / cover no-repeat;
  padding: 96px 0;
}
.band::after {
  content: "";
  position: absolute; inset: 0;
  background: rgba(15, 23, 42, 0.78);
}
.band .wrap { position: relative; z-index: 1; }
.band h2 { margin: 0 0 12px; font-size: clamp(1.6rem, 3vw, 2.1rem); letter-spacing: -0.03em; }
.band p { margin: 0; max-width: 38rem; color: #cbd5e1; }

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: start;
}
.contact-list { list-style: none; margin: 0; padding: 0; }
.contact-list li {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.contact-list li:first-child { padding-top: 0; }
.contact-list small {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 4px;
}
.contact-list a, .contact-list strong {
  font-size: 1.08rem;
  font-weight: 600;
}
.contact-list a:hover { color: var(--primary); }
.aside-note {
  background: var(--dark);
  color: #e2e8f0;
  border-radius: var(--radius);
  padding: 32px;
}
.aside-note h3 { margin: 0 0 10px; color: #fff; }
.aside-note p { margin: 0; color: #94a3b8; font-size: 0.95rem; }

.footer {
  background: var(--dark);
  color: #94a3b8;
  padding: 28px 0;
  font-size: 0.85rem;
}
.footer-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer a:hover { color: #fff; }

@media (max-width: 900px) {
  .nav { display: none; }
  .brand img { height: 58px; }
  .split, .split.reverse, .cards, .modules, .contact-grid { grid-template-columns: 1fr; }
  .split.reverse img { order: 0; }
  .split img { height: 280px; }
  .hero { min-height: 70vh; align-items: center; }
  section { padding: 64px 0; }
}