/* ========================================
   Blue Cloud Aviation
   Refined, low-contrast, premium.
   ======================================== */

:root {
  /* Brand */
  --navy:      #14213a;
  --navy-deep: #0a1628;
  --navy-mid:  #1c2e52;

  /* Warm neutrals (Anthropic/Claude-style cream) */
  --paper:        #f5f1ea;
  --paper-warm:   #ede6da;
  --paper-deeper: #e3dac8;

  /* Text */
  --ink:        #14213a;
  --ink-soft:   #4a5570;
  --ink-muted:  #7c8497;

  /* Accent (warm brass) */
  --accent: #b08a4a;

  --serif: 'Fraunces', 'Cormorant Garamond', Georgia, serif;
  --sans:  'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius: 6px;
  --transition: 0.3s ease;
  --max-w: 1100px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
}

/* ── Nav ────────────────────────────────── */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 18px 0;
  transition: var(--transition);
}

.nav.scrolled {
  background: rgba(245, 241, 234, 0.92);
  backdrop-filter: blur(14px) saturate(140%);
  padding: 12px 0;
  border-bottom: 1px solid rgba(20, 33, 58, 0.06);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo { display: flex; align-items: center; }

.logo-mark {
  height: 38px;
  width: auto;
  object-fit: contain;
  transition: var(--transition);
}

.nav.scrolled .logo-mark { height: 32px; }

.nav-links {
  display: flex;
  gap: 36px;
}

.nav-links a {
  color: var(--ink-soft);
  font-size: 0.86rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  height: 1px;
  width: 0;
  background: var(--ink);
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--ink);
}

.nav-links a:hover::after { width: 100%; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--ink);
}

/* ── Buttons ────────────────────────────── */

.btn {
  display: inline-block;
  padding: 13px 26px;
  font-size: 0.92rem;
  font-weight: 500;
  font-family: var(--sans);
  border-radius: var(--radius);
  transition: var(--transition);
  border: 1px solid transparent;
  cursor: pointer;
  letter-spacing: 0.005em;
}

.btn-primary {
  background: var(--navy);
  color: var(--paper);
}

.btn-primary:hover {
  background: var(--navy-deep);
  transform: translateY(-1px);
  box-shadow: 0 8px 22px -8px rgba(20, 33, 58, 0.4);
}

.btn-ghost {
  color: var(--ink);
  border-color: rgba(20, 33, 58, 0.18);
  background: transparent;
}

.btn-ghost:hover {
  border-color: var(--ink);
  background: rgba(20, 33, 58, 0.03);
}

/* ── Hero ───────────────────────────────── */

.hero {
  background:
    radial-gradient(ellipse at 70% 20%, rgba(176, 138, 74, 0.06), transparent 60%),
    linear-gradient(180deg, var(--paper) 0%, var(--paper-warm) 100%);
  padding: 180px 0 130px;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid rgba(20, 33, 58, 0.07);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(20, 33, 58, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 33, 58, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  background-position: -1px -1px;
  mask-image: radial-gradient(ellipse at 50% 30%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, black 30%, transparent 75%);
  pointer-events: none;
}

.hero-content {
  max-width: 760px;
  position: relative;
}

.hero-mark {
  width: 230px;
  height: auto;
  margin-bottom: 40px;
  opacity: 0.95;
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 5.2vw, 3.8rem);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 26px;
}

.hero h1 em {
  font-style: italic;
  font-weight: 400;
  color: var(--ink-soft);
}

.hero p {
  font-size: 1.1rem;
  color: var(--ink-soft);
  line-height: 1.75;
  margin-bottom: 40px;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* ── Eyebrow ────────────────────────────── */

.eyebrow {
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.eyebrow-light { color: rgba(245, 241, 234, 0.65); }

/* ── Sections ───────────────────────────── */

.section {
  padding: 110px 0;
}

.section-alt {
  background: var(--paper-warm);
  border-top: 1px solid rgba(20, 33, 58, 0.07);
  border-bottom: 1px solid rgba(20, 33, 58, 0.07);
}

.section-dark {
  background: var(--navy-deep);
  color: var(--paper);
}

.section h2 {
  font-family: var(--serif);
  font-size: clamp(1.8rem, 3.2vw, 2.4rem);
  font-weight: 500;
  letter-spacing: -0.018em;
  line-height: 1.15;
  margin-bottom: 12px;
  color: var(--ink);
}

.section-dark h2 { color: var(--paper); }

.section-lead {
  font-size: 1.04rem;
  color: var(--ink-soft);
  margin-bottom: 56px;
  max-width: 580px;
}

.section-dark .section-lead {
  color: rgba(245, 241, 234, 0.6);
}

/* ── Service Cards ──────────────────────── */

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(20, 33, 58, 0.08);
  border: 1px solid rgba(20, 33, 58, 0.08);
  border-radius: var(--radius);
  overflow: hidden;
}

.card {
  padding: 36px 32px;
  background: var(--paper);
  transition: var(--transition);
  position: relative;
}

.card:hover {
  background: var(--paper-warm);
}

.card h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 500;
  margin-bottom: 12px;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.card p {
  font-size: 0.92rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

/* ── Aircraft ───────────────────────────── */

.aircraft-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px 72px;
}

.aircraft-group {
  border-left: 2px solid var(--accent);
  padding-left: 22px;
}

.aircraft-group h3 {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.aircraft-group p {
  font-size: 0.96rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

/* ── About ──────────────────────────────── */

.about-content h2 {
  margin-bottom: 36px;
  max-width: 600px;
}

.about-text {
  max-width: 680px;
}

.about-text p {
  font-size: 1.1rem;
  color: var(--ink-soft);
  line-height: 1.85;
  margin-bottom: 22px;
}

.about-text p:first-child {
  font-size: 1.18rem;
  color: var(--ink);
}

.about-text p:last-child {
  margin-bottom: 0;
}

/* ── Contact ────────────────────────────── */

.contact-content {
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
}

.contact-content .eyebrow { text-align: center; }

.contact-content h2 {
  color: var(--paper);
  margin-bottom: 14px;
}

.contact-lede {
  color: rgba(245, 241, 234, 0.62);
  margin-bottom: 44px;
  font-size: 1.04rem;
}

.contact-card {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 32px 56px;
  background: rgba(245, 241, 234, 0.03);
  border: 1px solid rgba(245, 241, 234, 0.12);
  border-radius: var(--radius);
  transition: var(--transition);
}

.contact-card:hover {
  background: rgba(245, 241, 234, 0.06);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.contact-label {
  font-size: 0.72rem;
  color: rgba(245, 241, 234, 0.5);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-weight: 600;
}

.contact-value {
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--paper);
  letter-spacing: -0.005em;
}

/* ── Footer ─────────────────────────────── */

.footer {
  background: var(--navy-deep);
  padding: 26px 0;
  border-top: 1px solid rgba(245, 241, 234, 0.06);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: rgba(245, 241, 234, 0.4);
}

.footer-inner a {
  color: rgba(245, 241, 234, 0.4);
  transition: var(--transition);
}

.footer-inner a:hover { color: var(--paper); }

/* ── Fade in ────────────────────────────── */

.fade-in {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ─────────────────────────── */

@media (max-width: 820px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--paper);
    border-left: 1px solid rgba(20, 33, 58, 0.08);
    flex-direction: column;
    padding: 86px 32px;
    gap: 22px;
    transition: var(--transition);
  }

  .nav-links.open {
    right: 0;
    box-shadow: -8px 0 32px rgba(20, 33, 58, 0.15);
  }

  .nav-links a { font-size: 1rem; }

  .hero { padding: 140px 0 90px; }
  .hero-mark { width: 180px; margin-bottom: 28px; }
  .hero h1 br { display: none; }

  .section { padding: 72px 0; }

  .cards {
    grid-template-columns: 1fr;
  }

  .aircraft-list {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .contact-card { padding: 28px 36px; width: 100%; max-width: 360px; }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    max-width: 320px;
  }

  .hero-actions .btn { text-align: center; }

  .footer-inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}