:root {
  --navy: #16294f;
  --blue: #2563c4;
  --celeste: #75AADB;
  --bg: #f7f5f2;
  --card: #ffffff;
  --ink: #1d1d1f;
  --muted: #6b6b70;
  --radius: 14px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.wrap.narrow { max-width: 680px; }
.centre { text-align: center; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(247,245,242,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { font-weight: 700; letter-spacing: 0.14em; font-size: 15px; color: var(--navy); }
.site-header nav { display: flex; gap: 28px; align-items: center; }
.site-header nav a {
  color: var(--ink); text-decoration: none; font-size: 14px; font-weight: 500;
}
.site-header nav a:hover { color: var(--blue); }
.nav-cta {
  padding: 8px 16px; border: 1px solid var(--navy); border-radius: 999px; color: var(--navy) !important;
}
.nav-cta:hover { background: var(--navy); color: #fff !important; }

/* Hero */
.hero { position: relative; overflow: hidden; }
.hero-img { width: 100%; height: min(78vh, 760px); object-fit: cover; display: block; }
.hero-overlay {
  position: absolute; inset: 0;
  display: flex; align-items: flex-end;
  padding-bottom: 72px;
  background: linear-gradient(to top, rgba(10,18,38,0.55), rgba(10,18,38,0.05) 55%);
}
.hero h1 {
  color: #fff; font-size: clamp(34px, 5.4vw, 60px); font-weight: 700;
  letter-spacing: -0.02em; line-height: 1.08; margin-bottom: 16px;
}
.hero-sub { color: rgba(255,255,255,0.9); font-size: clamp(16px, 2vw, 20px); margin-bottom: 28px; }

.btn {
  display: inline-block; background: var(--celeste); color: var(--navy);
  font-weight: 600; font-size: 15px; text-decoration: none;
  padding: 13px 28px; border-radius: 999px; border: none; cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(22,41,79,0.25); }

/* Intro */
.intro { padding: 96px 0 24px; }
.lede { font-size: clamp(19px, 2.4vw, 25px); line-height: 1.5; color: var(--ink); font-weight: 500; letter-spacing: -0.01em; }

/* Sections */
section { padding: 72px 0; }
h2 { font-size: clamp(26px, 3.4vw, 38px); letter-spacing: -0.02em; color: var(--navy); margin-bottom: 12px; }
.section-sub { color: var(--muted); font-size: 16px; margin-bottom: 40px; max-width: 560px; }
.centre .section-sub { margin-left: auto; margin-right: auto; }

/* Cards */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
  background: var(--card); border-radius: var(--radius); overflow: hidden;
  box-shadow: 0 1px 3px rgba(22,41,79,0.06), 0 8px 24px rgba(22,41,79,0.05);
}
.card img { width: 100%; aspect-ratio: 3/4; object-fit: cover; display: block; }
.card figcaption { padding: 18px 20px 22px; display: flex; flex-direction: column; gap: 4px; }
.card-title { font-weight: 600; font-size: 16px; color: var(--navy); }
.card-note { font-size: 14px; color: var(--muted); }

/* Nicknames */
.nicknames { background: #fff; }
.split { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }
.split-text p { margin-bottom: 18px; color: #3a3a3e; }
.split-text h2 { margin-bottom: 20px; }
.fine { font-size: 13px; color: var(--muted); }

/* Launch */
.launch { background: var(--navy); color: #fff; }
.launch h2 { color: #fff; }
.launch .section-sub { color: rgba(255,255,255,0.75); }
.signup { display: flex; gap: 12px; justify-content: center; margin: 32px 0 16px; flex-wrap: wrap; }
.signup input {
  flex: 1 1 260px; max-width: 340px; padding: 13px 20px; font-size: 15px;
  border-radius: 999px; border: 1px solid rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.08); color: #fff; outline: none;
  font-family: inherit;
}
.signup input::placeholder { color: rgba(255,255,255,0.5); }
.signup input:focus { border-color: var(--celeste); background: rgba(255,255,255,0.12); }
.launch .fine { color: rgba(255,255,255,0.55); }

/* Footer */
.site-footer { padding: 40px 0; background: var(--bg); }
.footer-inner { display: flex; flex-direction: column; gap: 6px; align-items: center; text-align: center; }

/* Mobile */
@media (max-width: 820px) {
  .grid-3 { grid-template-columns: 1fr; gap: 20px; }
  .split { grid-template-columns: 1fr; gap: 32px; }
  .hero-img { height: 62vh; object-position: 34% 25%; }
  .hero-overlay { padding-bottom: 48px; }
  .intro { padding: 64px 0 8px; }
  section { padding: 56px 0; }
  .site-header nav { gap: 16px; }
  .site-header nav a { font-size: 13px; }
}
@media (max-width: 480px) {
  .site-header nav a:not(.nav-cta) { display: none; }
}