:root {
  --primary-color: #0A2540; /* Premium deep blue */
  --secondary-color: #635BFF; /* Accent branding, similar to modern fintechs */
  --accent-color: #00D4FF; /* Vibrant highlight */
  --success-color: #00D924;
  --danger-color: #FF2B44;
  --text-dark: #32325D;
  --text-light: #6B7C93;
  --bg-light: #F6F9FC;
  --bg-white: #FFFFFF;
  --border-color: #E6EBF1;
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.18);
  --box-shadow: 0 15px 35px rgba(50, 50, 93, 0.1), 0 5px 15px rgba(0, 0, 0, 0.07);
  --box-shadow-hover: 0 30px 60px rgba(50, 50, 93, 0.15), 0 8px 25px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a:hover {
  filter: brightness(1.2);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

/* Header Navbar */
header {
  box-shadow: 0 4px 15px rgba(0,0,0,0.06);
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-white);
}

.top-bar {
  background: var(--primary-color);
  height: 38px;
}

.main-header {
  height: 75px;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.logo {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo span {
  color: var(--secondary-color);
}

.nav-links {
  display: flex;
  gap: 30px;
  list-style: none;
}

.nav-links a {
  color: var(--text-dark);
  font-weight: 500;
  font-size: 15px;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.btn-primary {
  background: var(--secondary-color);
  color: white !important;
  box-shadow: 0 4px 6px rgba(99, 91, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(99, 91, 255, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--primary-color) !important;
  border: 2px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--primary-color);
}

/* Forms general */
.form-group {
  margin-bottom: 20px;
  position: relative;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-control {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-family: inherit;
  font-size: 16px;
  color: var(--text-dark);
  background: var(--bg-white);
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--secondary-color);
  box-shadow: 0 0 0 3px rgba(99, 91, 255, 0.15);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, #1a365d 100%);
  padding: 100px 0;
  color: white;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url('https://www.transparenttextures.com/patterns/cubes.png');
  opacity: 0.05;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero p {
  font-size: 18px;
  color: #B0C4DE;
  max-width: 600px;
  margin: 0 auto 40px;
}

/* Search Box / Glassmorphism */
.search-box {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 30px;
  max-width: 900px;
  margin: -60px auto 40px;
  position: relative;
  z-index: 10;
  box-shadow: var(--box-shadow);
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  align-items: flex-end;
}

.search-box .form-group {
  margin-bottom: 0;
  flex: 1;
  min-width: 200px;
}

.search-box .btn {
  height: 52px;
  padding: 0 30px;
}

/* Autocomplete Dropdown */
.autocomplete-items {
  position: absolute;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--bg-white);
  z-index: 99;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: 5px;
  box-shadow: var(--box-shadow);
  max-height: 250px;
  overflow-y: auto;
  display: none;
}

.autocomplete-item {
  padding: 12px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--bg-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.autocomplete-item:last-child {
  border-bottom: none;
}

.autocomplete-item:hover {
  background-color: var(--bg-light);
}

.autocomplete-item .airport-code {
  font-weight: 700;
  color: var(--secondary-color);
}

.autocomplete-item .airport-name {
  font-size: 14px;
  color: var(--text-dark);
}

/* Footer */
footer {
  background-color: var(--primary-color);
  color: #B0C4DE;
  padding: 60px 0 30px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h3 {
  color: white;
  font-size: 18px;
  margin-bottom: 20px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul a {
  color: #B0C4DE;
}

.footer-col ul a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 14px;
}

/* Utilities */
.text-center { text-align: center; }
.mt-40 { margin-top: 40px; }
.mb-40 { margin-bottom: 40px; }
.d-flex { display: flex; }
.gap-20 { gap: 20px; }
.content-wrapper { padding: 60px 0; }