/* Summit Air — Brand Styles */

:root {
  --sa-navy: #0a1f3d;
  --sa-navy-light: #142d52;
  --sa-blue: #1a4d8f;
  --sa-blue-light: #2e6dbf;
  --sa-gold: #c9a227;
  --sa-gold-light: #e0c24a;
  --sa-sky: #e8f1fa;
  --sa-cloud: #f7f9fc;
  --sa-text: #1a2a3a;
  --sa-text-light: #5a6a7a;
  --sa-white: #ffffff;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--sa-text);
  background: var(--sa-white);
}

/* Navbar */
.sa-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: background-color 0.3s ease, box-shadow 0.3s ease, padding 0.3s ease;
  padding: 1.25rem 0;
}

.sa-nav.scrolled {
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 2px 20px rgba(10, 31, 61, 0.08);
  padding: 0.75rem 0;
}

.sa-nav-link {
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  font-size: 0.875rem;
  text-decoration: none;
  transition: color 0.2s ease;
  position: relative;
}

.sa-nav.scrolled .sa-nav-link {
  color: var(--sa-text);
}

.sa-nav-link:hover {
  color: var(--sa-gold-light);
}

.sa-nav.scrolled .sa-nav-link:hover {
  color: var(--sa-blue);
}

.sa-nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--sa-gold);
  transition: width 0.3s ease;
}

.sa-nav-link:hover::after {
  width: 100%;
}

.sa-nav-link.active {
  color: var(--sa-gold-light);
}

.sa-nav.scrolled .sa-nav-link.active {
  color: var(--sa-blue);
}

/* Logo */
.sa-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.sa-logo-img {
  height: 38px;
  width: auto;
  transition: filter 0.3s ease;
}

/* On transparent nav (dark hero background), make logo white */
.sa-nav:not(.scrolled) .sa-logo-img {
  filter: brightness(0) invert(1);
}

/* On scrolled nav (white background), show natural logo colors */
.sa-nav.scrolled .sa-logo-img {
  filter: none;
}

/* Footer is always dark — make logo white */
.sa-footer .sa-logo-img {
  filter: brightness(0) invert(1);
}

/* Mobile menu is dark — make logo white */
.sa-mobile-menu .sa-logo-img {
  filter: brightness(0) invert(1);
}

/* Buttons */
.sa-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: all 0.25s ease;
  cursor: pointer;
  border: none;
}

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

.sa-btn-primary:hover {
  background: var(--sa-gold-light);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(201, 162, 39, 0.3);
}

.sa-btn-secondary {
  background: transparent;
  color: var(--sa-white);
  border: 2px solid rgba(255, 255, 255, 0.4);
}

.sa-btn-secondary:hover {
  border-color: var(--sa-gold);
  color: var(--sa-gold-light);
}

.sa-btn-dark {
  background: var(--sa-navy);
  color: var(--sa-white);
}

.sa-btn-dark:hover {
  background: var(--sa-navy-light);
  transform: translateY(-1px);
}

/* Footer */
.sa-footer {
  background: var(--sa-navy);
  color: rgba(255, 255, 255, 0.7);
  padding: 4rem 0 2rem;
}

.sa-footer a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s ease;
}

.sa-footer a:hover {
  color: var(--sa-gold-light);
}

.sa-footer-heading {
  color: var(--sa-white);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}

/* Section helpers */
.sa-section {
  padding: 5rem 0;
}

.sa-section-cloud {
  background: var(--sa-cloud);
}

.sa-heading {
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--sa-navy);
}

.sa-eyebrow {
  color: var(--sa-gold);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* Cards */
.sa-card {
  background: var(--sa-white);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(10, 31, 61, 0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.sa-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(10, 31, 61, 0.12);
}

/* Iconify sizing */
.iconify {
  display: inline-block;
  vertical-align: -0.125em;
}

/* Mobile menu */
.sa-mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--sa-navy);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
}

.sa-mobile-menu.open {
  display: flex;
}

.sa-mobile-menu a {
  color: var(--sa-white);
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: 600;
}

/* Hamburger */
.sa-hamburger {
  display: none;
  cursor: pointer;
  color: var(--sa-white);
}

.sa-nav.scrolled .sa-hamburger {
  color: var(--sa-navy);
}

@media (max-width: 768px) {
  .sa-nav-desktop {
    display: none;
  }
  .sa-hamburger {
    display: block;
  }
}

/* Animations */
@keyframes sa-fade-up {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.sa-animate {
  animation: sa-fade-up 0.7s ease forwards;
}

.sa-delay-1 { animation-delay: 0.15s; opacity: 0; }
.sa-delay-2 { animation-delay: 0.3s; opacity: 0; }
.sa-delay-3 { animation-delay: 0.45s; opacity: 0; }

/* Hero overlay */
.sa-hero-overlay {
  background: linear-gradient(135deg, rgba(10, 31, 61, 0.75) 0%, rgba(10, 31, 61, 0.4) 100%);
}

/* Form inputs */
.sa-input {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid #e0e5ec;
  border-radius: 0.5rem;
  font-size: 0.9rem;
  transition: border-color 0.2s ease;
  background: var(--sa-white);
}

.sa-input:focus {
  outline: none;
  border-color: var(--sa-blue);
}

.sa-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--sa-text-light);
  margin-bottom: 0.5rem;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--sa-cloud);
}
::-webkit-scrollbar-thumb {
  background: var(--sa-blue);
  border-radius: 4px;
}

/* Select inputs — custom arrow */
select.sa-input {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%235a6a7a' viewBox='0 0 256 256'%3E%3Cpath d='M213.66,101.66l-80,80a8,8,0,0,1-11.32,0l-80-80A8,8,0,0,1,53.66,90.34L128,164.69l74.34-74.35a8,8,0,0,1,11.32,11.32Z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

/* Details/summary — hide default marker */
summary {
  list-style: none;
}
summary::-webkit-details-marker {
  display: none;
}

/* Form success message */
.sa-form-success {
  display: none;
  background: #ecfdf5;
  border: 2px solid #10b981;
  color: #065f46;
  padding: 1rem 1.25rem;
  border-radius: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  align-items: center;
  gap: 0.5rem;
}

.sa-form-success.show {
  display: flex;
}