/* 
   Theme: Airline Professional
   Colors: Navy Blue (#0a192f), White (#ffffff), Light Grey (#f4f7f6), Accent Gold (#ffd700)
   Font: Inter, sans-serif
*/

:root {
    --color-primary: #0a192f;
    /* Deep Navy */
    --color-secondary: #172a45;
    /* Lighter Navy */
    --color-accent: #ffd700;
    /* Gold */
    --color-text-light: #ccd6f6;
    --color-text-dark: #333333;
    --color-bg-light: #f4f7f6;
    --color-white: #ffffff;

    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 32px;
    --spacing-xl: 64px;

    --border-radius: 4px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--color-bg-light);
    color: var(--color-text-dark);
    line-height: 1.6;
}

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

ul {
    list-style: none;
}

/* Layout Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
}

.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* Typography */
h1,
h2,
h3,
h4 {
    color: var(--color-primary);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 3rem;
}

h2 {
    font-size: 2.25rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: var(--spacing-md);
    color: #555;
}

/* Navigation */
.navbar {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
}

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

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-accent);
}

/* Hero Section */
.hero {
    background-image: linear-gradient(rgba(10, 25, 47, 0.85), rgba(10, 25, 47, 0.85)), url('cockpit_background.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--color-white);
    padding: 140px 0;
    text-align: center;
}

.hero h1 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

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

.btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--color-accent);
    color: var(--color-primary);
    font-weight: 600;
    border-radius: var(--border-radius);
    border: 2px solid var(--color-accent);
}

.btn:hover {
    background-color: transparent;
    color: var(--color-accent);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-accent);
    border: 2px solid var(--color-accent);
    margin-left: var(--spacing-md);
}

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

/* Cards */
.card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    border-top: 4px solid var(--color-primary);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.card h3 {
    color: var(--color-primary);
}

/* Footer */
footer {
    background-color: var(--color-secondary);
    color: var(--color-text-light);
    padding: var(--spacing-lg) 0;
    text-align: center;
    margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .nav-links {
        display: none;
    }

    /* Simple hide for now, can add toggle later */
}