/* ================================================================
   AVIATCKT — Design System · main.css
   ================================================================ */

:root {
  --primary:       #1558f6;
  --primary-dark:  #0e3fa3;
  --primary-light: #dbeafe;
  --secondary:     #f97316;
  --secondary-dark:#e8620f;
  --bg:            #f0f4ff;
  --surface:       #ffffff;
  --text:          #0f172a;
  --muted:         #64748b;
  --border:        #e2e8f0;
  --success:       #22c55e;
  --danger:        #ef4444;

  --font: 'Inter', system-ui, -apple-system, sans-serif;

  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   16px;
  --radius-xl:   24px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 4px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,.08), 0 2px 6px rgba(0,0,0,.04);
  --shadow-lg: 0 10px 32px rgba(0,0,0,.10), 0 4px 12px rgba(0,0,0,.06);
  --shadow-xl: 0 20px 56px rgba(0,0,0,.12), 0 8px 20px rgba(0,0,0,.07);

  --ease: 150ms cubic-bezier(.4,0,.2,1);
  --ease-slow: 300ms cubic-bezier(.4,0,.2,1);

  --container: 1200px;
  --nav-h: 64px;
}

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  font-size: 1rem;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
ul { list-style: none; }
fieldset { border: none; }

/* ── Layout ────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}
@media (min-width: 768px) { .container { padding: 0 2rem; } }

/* ── Nav ───────────────────────────────────────────────────── */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(10, 24, 80, .94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.07);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}
@media (min-width: 768px) { .nav-inner { padding: 0 2rem; } }

.logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  color: #fff;
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -.03em;
}
.logo svg { flex-shrink: 0; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}
.nav-links a {
  color: rgba(255,255,255,.7);
  font-size: .875rem;
  font-weight: 500;
  transition: color var(--ease);
}
.nav-links a:hover { color: #fff; }

@media (max-width: 600px) { .nav-links { display: none; } }

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .625rem 1.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: .9375rem;
  cursor: pointer;
  border: none;
  transition: all var(--ease);
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(21,88,246,.35);
}
.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 6px 20px rgba(21,88,246,.45);
  transform: translateY(-1px);
}
.btn-primary:active { transform: none; }
.btn-ghost {
  background: rgba(255,255,255,.12);
  color: #fff;
  border: 1px solid rgba(255,255,255,.2);
}
.btn-ghost:hover { background: rgba(255,255,255,.2); }

/* ── Spinner ───────────────────────────────────────────────── */
.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 5rem 0;
  color: var(--muted);
  font-size: .9375rem;
}

/* ── Footer ────────────────────────────────────────────────── */
.footer {
  background: #08122b;
  color: rgba(255,255,255,.55);
  padding: 4rem 0 2rem;
  margin-top: 5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.footer-brand .logo { margin-bottom: .75rem; }
.footer-brand p { font-size: .875rem; line-height: 1.7; max-width: 260px; }
.footer-col h4 {
  color: #fff;
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  margin-bottom: 1rem;
}
.footer-col li + li { margin-top: .5rem; }
.footer-col a { font-size: .875rem; color: rgba(255,255,255,.55); transition: color var(--ease); }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: .8125rem;
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; gap: .75rem; text-align: center; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ── Section helpers ───────────────────────────────────────── */
.section-eyebrow {
  font-size: .8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--primary);
  margin-bottom: .75rem;
}
.section-title {
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.15;
  margin-bottom: 1rem;
}
.section-sub {
  font-size: 1.0625rem;
  color: var(--muted);
  max-width: 520px;
}