/* Blue Horizon Expeditions — shared styles */

:root {
  --navy-deep: #060f1a;
  --navy: #0b1f33;
  --navy-mid: #142d4c;
  --blue-accent: #3a7ca5;
  --blue-light: #6fa8c9;
  --sand: #f4efe4;
  --white: #ffffff;
  --ink: #1a1a1a;
  --muted: #5b6774;
  --max-width: 1160px;
  --serif: 'Playfair Display', Georgia, serif;
  --sans: 'Work Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
}

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

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--serif);
  color: var(--navy);
  line-height: 1.15;
  margin: 0 0 0.5em;
}

p { margin: 0 0 1em; color: var(--muted); }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--blue-accent);
}

/* ---------- Header / Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navy);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--serif);
  color: var(--white);
  font-size: 1.15rem;
  letter-spacing: 0.03em;
}

.brand-mark {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 1.5px solid var(--blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-mark svg { width: 24px; height: 24px; }

.brand-text strong { display: block; font-size: 1.3rem; }
.brand-text span { display: block; font-size: 0.72rem; letter-spacing: 0.25em; color: var(--blue-light); }

nav.main-nav {
  display: flex;
  gap: 28px;
}

nav.main-nav a {
  color: rgba(255,255,255,0.82);
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  font-weight: 500;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s, color 0.2s;
}

nav.main-nav a:hover,
nav.main-nav a.active {
  color: var(--white);
  border-bottom-color: var(--blue-accent);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
}

@media (max-width: 820px) {
  nav.main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--navy);
    flex-direction: column;
    gap: 0;
    display: none;
    border-top: 1px solid rgba(255,255,255,0.08);
  }
  nav.main-nav.open { display: flex; }
  nav.main-nav a { padding: 14px 24px; border-bottom: 1px solid rgba(255,255,255,0.06); }
  .nav-toggle { display: block; }
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  background: radial-gradient(ellipse at top, var(--navy-mid), var(--navy-deep) 70%);
  color: var(--white);
  padding: 100px 24px 120px;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 90px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 90' preserveAspectRatio='none'%3E%3Cpath d='M0 40 Q150 0 300 40 T600 40 T900 40 T1200 40 V90 H0 Z' fill='%23f4efe4'/%3E%3C/svg%3E") no-repeat bottom / cover;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
  z-index: 2;
  text-align: center;
}

.hero h1 {
  color: var(--white);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  max-width: 820px;
  margin: 0.3em auto 0.4em;
}

.hero p.lead {
  color: rgba(255,255,255,0.78);
  max-width: 620px;
  margin: 0 auto 2em;
  font-size: 1.05rem;
}

.hero-small {
  padding: 64px 24px 90px;
}

.hero-small h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); }

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 14px 30px;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 600;
  border-radius: 2px;
  transition: transform 0.15s, background 0.2s, color 0.2s;
}

.btn-primary {
  background: var(--blue-accent);
  color: var(--white);
}
.btn-primary:hover { background: var(--blue-light); transform: translateY(-1px); }

.btn-outline {
  border: 1.5px solid rgba(255,255,255,0.6);
  color: var(--white);
  margin-left: 14px;
}
.btn-outline:hover { border-color: var(--white); background: rgba(255,255,255,0.08); }

.btn-outline-dark {
  border: 1.5px solid var(--navy);
  color: var(--navy);
}
.btn-outline-dark:hover { background: var(--navy); color: var(--white); }

/* ---------- Sections ---------- */

section { padding: 80px 0; }
section.tight { padding: 56px 0; }
section.on-sand { background: var(--sand); }
section.on-navy { background: var(--navy); color: var(--white); }
section.on-navy h2, section.on-navy h3 { color: var(--white); }
section.on-navy p { color: rgba(255,255,255,0.72); }

.section-head { text-align: center; max-width: 640px; margin: 0 auto 48px; }

.grid {
  display: grid;
  gap: 32px;
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 820px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

.card {
  background: var(--white);
  border: 1px solid rgba(11,31,51,0.08);
  padding: 32px;
  border-radius: 3px;
}

section.on-navy .card {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.12);
}

.card .num {
  font-family: var(--serif);
  font-size: 2rem;
  color: var(--blue-accent);
  margin-bottom: 0.2em;
}

/* ---------- Placeholder imagery ---------- */

.ph-photo {
  position: relative;
  background: linear-gradient(135deg, var(--navy-mid), var(--navy));
  aspect-ratio: 4 / 3;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.ph-photo svg { width: 40%; opacity: 0.5; }

.ph-photo span {
  position: absolute;
  bottom: 12px;
  left: 14px;
  right: 14px;
  color: rgba(255,255,255,0.55);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ---------- Expedition cards ---------- */

.expedition {
  border: 1px solid rgba(11,31,51,0.1);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 28px;
  display: grid;
  grid-template-columns: 280px 1fr;
}

@media (max-width: 760px) {
  .expedition { grid-template-columns: 1fr; }
}

.expedition .ph-photo { aspect-ratio: auto; height: 100%; min-height: 200px; border-radius: 0; }

.expedition-body { padding: 28px 32px; }

.expedition-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin: 16px 0 20px;
  font-size: 0.85rem;
}

.expedition-meta div strong {
  display: block;
  color: var(--navy);
  font-family: var(--serif);
  font-size: 1.05rem;
}

.expedition-meta div span { color: var(--muted); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; }

.tag {
  display: inline-block;
  background: var(--sand);
  color: var(--navy);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 20px;
  margin-right: 6px;
  font-weight: 600;
}

.note-box {
  background: var(--sand);
  border-left: 3px solid var(--blue-accent);
  padding: 18px 22px;
  font-size: 0.88rem;
  color: var(--navy);
  margin: 24px 0;
}
.note-box strong { color: var(--navy); }

/* ---------- Principles list ---------- */

.principle {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.principle .mark {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1.5px solid var(--blue-accent);
  color: var(--blue-accent);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif);
  flex-shrink: 0;
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--navy-deep);
  color: rgba(255,255,255,0.6);
  padding: 56px 0 28px;
  font-size: 0.85rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 36px;
}

@media (max-width: 700px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-grid h4 {
  color: var(--white);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}

.footer-grid a { display: block; margin-bottom: 8px; color: rgba(255,255,255,0.6); }
.footer-grid a:hover { color: var(--white); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.75rem;
}

/* ---------- Gallery ---------- */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
@media (max-width: 760px) { .gallery-grid { grid-template-columns: repeat(2, 1fr); } }

/* ---------- Form ---------- */

form.contact-form { display: grid; gap: 18px; max-width: 560px; }
.contact-form label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--navy); font-weight: 600; display: block; margin-bottom: 6px; }
.contact-form input, .contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid rgba(11,31,51,0.2);
  border-radius: 2px;
  font-family: var(--sans);
  font-size: 0.95rem;
}
.contact-form textarea { min-height: 140px; resize: vertical; }
.contact-form button { justify-self: start; border: none; cursor: pointer; }