/* Korea Travel & Air - Main Style */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&family=Outfit:wght@400;600;700&display=swap');

:root {
    --primary: #0a2351; /* Deep Navy Blue */
    --secondary: #0076a3; /* Ocean Blue */
    --accent: #fbc02d; /* Gold for highlight */
    --light-bg: #f8fafc;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --white: #ffffff;
    --glass: rgba(255, 255, 255, 0.8);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    background-color: var(--light-bg);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, .nav-logo {
    font-family: 'Outfit', sans-serif;
}

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

ul {
    list-style: none;
}

/* Header & Nav */
header {
    background: var(--white);
    padding: 1rem 5%;
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

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

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-main);
}

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

.nav-cta {
    background: var(--primary);
    color: var(--white);
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Hero Section */
.hero {
    height: 80vh;
    background: linear-gradient(rgba(10, 35, 81, 0.6), rgba(10, 35, 81, 0.2)), url('../images/hero-travel.jpg');
    background-size: cover;
    background-position: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--white);
    padding: 2rem;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    text-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

.hero p {
    font-size: 1.25rem;
    max-width: 800px;
    margin-bottom: 2rem;
    font-weight: 300;
}

.btn {
    padding: 0.8rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
}

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

/* Features */
.features {
    padding: 5rem 10%;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
    margin-top: -4rem;
    position: relative;
    z-index: 10;
}

.feature-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-card i {
    font-size: 2.5rem;
    color: var(--secondary);
    margin-bottom: 1.5rem;
    display: block;
}

/* Tours Section */
.tours-section {
    padding: 5rem 10%;
}

.section-title {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.tour-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.tour-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.tour-img {
    height: 220px;
    background-size: cover;
    background-position: center;
}

.tour-content {
    padding: 1.5rem;
}

/* Footer */
footer {
    background: var(--primary);
    color: rgba(255,255,255,0.8);
    padding: 5rem 10% 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-info h3 {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.footer-copy {
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 2rem;
    font-size: 0.85rem;
}