:root {
    --primary-color: #0066FF;
    --accent-color: #00C2FF;
    --bg-color: #F5F7FA;
    --white: #ffffff;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.3);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: #333;
}

.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    padding: 100px 0;
    color: white;
    border-radius: 0 0 50px 50px;
    margin-bottom: -50px;
}

.search-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    padding: 30px;
}

.flight-card {
    background: white;
    border-radius: 15px;
    border: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.flight-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.btn-primary {
    background-color: var(--primary-color);
    border: none;
    padding: 12px 30px;
    border-radius: 10px;
    font-weight: 600;
}

.btn-primary:hover {
    background-color: #0052cc;
}

.navbar {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.navbar-brand {
    font-weight: 800;
    color: var(--primary-color) !important;
}

.skeleton {
    background: #e0e0e0;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Custom Autocomplete */
.autocomplete-items {
    position: absolute;
    border: 1px solid #d4d4d4;
    border-bottom: none;
    border-top: none;
    z-index: 99;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border-radius: 0 0 10px 10px;
}

.autocomplete-items div {
    padding: 10px;
    cursor: pointer;
    border-bottom: 1px solid #d4d4d4;
}

.autocomplete-items div:hover {
    background-color: #e9e9e9;
}