:root {
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --secondary: #64748b;
    --bg-light: #f8fafc;
    --white: #ffffff;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --success: #22c55e;
    --warning: #eab308;
    --danger: #ef4444;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --radius: 0.5rem;
}

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

body {
    font-family: system-ui, -apple-system, sans-serif;
    color: var(--text-dark);
    background-color: var(--bg-light);
    line-height: 1.5;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s;
}

a:hover {
    color: var(--primary);
}

/* Header */
header {
    background: var(--white);
    border-bottom: 1px solid #e2e8f0;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 50;
}

.logo {
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

nav ul {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    font-weight: 500;
    color: var(--text-light);
}

.btn {
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-outline {
    border: 1px solid #e2e8f0;
    background: transparent;
}

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

/* Hero */
.hero {
    text-align: center;
    padding: 5rem 1rem;
    background: linear-gradient(to bottom, #f0f9ff, var(--bg-light));
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.search-box {
    max-width: 500px;
    margin: 0 auto;
    display: flex;
    gap: 0.5rem;
    background: var(--white);
    padding: 0.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    border: 1px solid #e2e8f0;
}

.search-input {
    flex: 1;
    padding: 0.75rem;
    border: none;
    outline: none;
    font-size: 1rem;
}

/* Features */
.features {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.feature-icon {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 1rem;
    display: block;
}

/* Delay Map Section */
.map-preview {
    background: #e2e8f0;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 4rem 2rem;
    border-radius: var(--radius);
    position: relative;
    overflow: hidden;
}

.map-cta {
    background: rgba(255, 255, 255, 0.9);
    padding: 2rem;
    border-radius: var(--radius);
    text-align: center;
    z-index: 10;
}

/* Airport Directory Preview */
.airport-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
    padding: 2rem 0;
}

.airport-card {
    background: var(--white);
    border: 1px solid #e2e8f0;
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.airport-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.status-badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-top: 0.5rem;
}

.status-good { background: #dcfce7; color: #166534; }
.status-fair { background: #fef9c3; color: #854d0e; }
.status-bad { background: #fee2e2; color: #991b1b; }

/* Pricing */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 4rem auto;
    padding: 0 1rem;
}

.pricing-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    border: 1px solid #e2e8f0;
    text-align: center;
}

.pricing-card.highlight {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: scale(1.05);
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 1rem 0;
    color: var(--text-dark);
}

.price span {
    font-size: 1rem;
    color: var(--text-light);
    font-weight: 400;
}

/* Footer */
footer {
    background: var(--white);
    border-top: 1px solid #e2e8f0;
    padding: 4rem 2rem;
    margin-top: auto;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-col h4 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

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

.footer-col li {
    margin-bottom: 0.5rem;
}

.footer-col a {
    color: var(--text-light);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    header {
        padding: 1rem;
    }
    nav ul {
        display: none; /* Simple mobile hide for now */
    }
    .hero h1 {
        font-size: 2rem;
    }
}