:root {
  --navy: #0f2436;
  --navy-2: #13304a;
  --deep: #091a2b;
  --blue: #1f7ac0;
  --blue-light: #7cc5ff;
  --sand: #e9dfce;
  --ink: #16232f;
  --paper: #f6f8fa;
  --muted: #6a8199;
  --line: #dde5ec;
  --radius: 16px;
  --shadow: 0 18px 40px -22px rgba(9, 26, 43, .45);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

a { color: var(--blue); text-decoration: none; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(15, 36, 54, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand { display: flex; align-items: center; gap: 8px; color: #fff; font-weight: 700; letter-spacing: .2px; }
.brand-mark { font-size: 20px; }
.brand-text { font-size: 16px; }
.nav { display: flex; align-items: center; gap: 22px; }
.nav a { color: #dbe7f1; font-size: 15px; }
.nav a:hover { color: #fff; }
.nav-cta { background: var(--blue); color: #fff !important; padding: 8px 16px; border-radius: 999px; }
.nav-cta:hover { background: #2a8ad4; }

/* Hero */
.hero {
  background-size: cover; background-position: center;
  color: #fff;
  padding: 96px 0 104px;
}
.hero-inner { max-width: 720px; }
.eyebrow { text-transform: uppercase; letter-spacing: 2px; font-size: 13px; color: var(--blue-light); margin: 0 0 14px; }
.hero h1 { font-size: clamp(38px, 7vw, 66px); line-height: 1.02; margin: 0 0 18px; font-weight: 800; letter-spacing: -.5px; }
.lead { font-size: clamp(17px, 2.4vw, 20px); color: #e7eef5; max-width: 620px; margin: 0 0 30px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

/* Buttons */
.btn { display: inline-block; padding: 14px 26px; border-radius: 999px; font-weight: 600; font-size: 16px; cursor: pointer; border: 1px solid transparent; transition: transform .06s ease, background .2s ease; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: #2a8ad4; }
.btn-ghost { background: rgba(255, 255, 255, .08); color: #fff; border-color: rgba(255, 255, 255, .5); }
.btn-ghost:hover { background: rgba(255, 255, 255, .18); }
.btn-block { width: 100%; }

/* Features */
.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding-top: 46px; padding-bottom: 6px; }
.feature { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.feature span { font-size: 26px; }
.feature h3 { margin: 10px 0 6px; font-size: 17px; }
.feature p { margin: 0; color: var(--muted); font-size: 14.5px; }

/* Sections */
.section { padding: 64px 0; }
.section-alt { background: var(--navy); color: #eaf2f8; }
.section-head { max-width: 640px; margin: 0 auto 34px; text-align: center; }
.section-head h2 { font-size: clamp(28px, 4vw, 38px); margin: 0 0 8px; font-weight: 800; letter-spacing: -.3px; }
.section-head p { margin: 0; color: var(--muted); font-size: 17px; }
.section-alt .section-head p { color: #9fb8cd; }

/* Tours */
.tours { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.tour-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; display: flex; flex-direction: column; box-shadow: var(--shadow); }
.tour-card .duration { font-size: 13px; text-transform: uppercase; letter-spacing: 1.5px; color: var(--blue); font-weight: 700; }
.tour-card h3 { margin: 8px 0 8px; font-size: 22px; }
.tour-card .summary { color: var(--muted); margin: 0 0 16px; font-size: 15px; }
.tour-card ul { list-style: none; padding: 0; margin: 0 0 20px; }
.tour-card li { padding: 6px 0 6px 24px; position: relative; font-size: 14.5px; }
.tour-card li::before { content: "⚓"; position: absolute; left: 0; font-size: 13px; opacity: .7; }
.tour-card .price { font-size: 26px; font-weight: 800; margin-top: auto; }
.tour-card .price small { font-size: 14px; font-weight: 500; color: var(--muted); }
.tour-card .pick { margin-top: 16px; text-align: center; }

/* Gallery */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.gallery figure { margin: 0; border-radius: var(--radius); overflow: hidden; position: relative; background: var(--navy-2); }
.gallery img { width: 100%; height: 260px; object-fit: cover; transition: transform .4s ease; }
.gallery figure:hover img { transform: scale(1.04); }
.gallery figcaption { position: absolute; left: 0; right: 0; bottom: 0; padding: 26px 14px 12px; font-size: 13.5px; color: #fff; background: linear-gradient(transparent, rgba(9, 26, 43, .85)); }

/* Booking */
.booking-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 40px; align-items: start; }
.booking-intro h2 { font-size: clamp(28px, 4vw, 38px); margin: 0 0 12px; font-weight: 800; }
.booking-intro p { color: var(--muted); font-size: 17px; }
.checklist { list-style: none; padding: 0; margin: 22px 0 0; }
.checklist li { padding: 8px 0 8px 30px; position: relative; }
.checklist li::before { content: "✓"; position: absolute; left: 0; color: var(--blue); font-weight: 800; }
.booking-form { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); }
.field { margin-bottom: 16px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.opt { font-weight: 400; color: var(--muted); }
input, select, textarea { width: 100%; font: inherit; padding: 12px 14px; border: 1px solid var(--line); border-radius: 12px; background: #fbfcfd; color: var(--ink); }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(31, 122, 192, .15); }
textarea { resize: vertical; }
.form-note { margin: 14px 0 0; font-size: 14.5px; min-height: 20px; }
.form-note.ok { color: #147a4a; }
.form-note.err { color: #c0392b; }

/* Footer */
.site-footer { background: var(--deep); color: #cddceb; padding: 40px 0; }
.footer-inner { display: flex; flex-direction: column; gap: 8px; }
.footer-inner .brand-mark { margin-right: 6px; }
.muted { color: var(--muted); }
.section-alt .muted { color: #9fb8cd; }

/* Responsive */
@media (max-width: 900px) {
  .features { grid-template-columns: repeat(2, 1fr); }
  .tours { grid-template-columns: 1fr; }
  .booking-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 620px) {
  .nav a:not(.nav-cta) { display: none; }
  .gallery { grid-template-columns: 1fr 1fr; }
  .gallery img { height: 190px; }
  .features { grid-template-columns: 1fr; }
  .hero { padding: 70px 0 78px; }
}