:root {
    --primary-color: #00bcd4; /* Cyan/Light Blue */
    --secondary-color: #008ba3; /* Darker Cyan */
    --accent-color: #ff4081; /* Pink accent for buttons */
    --text-dark: #333;
    --text-light: #fff;
    --bg-light: #f4f7f6;
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: 1px solid rgba(255, 255, 255, 0.3);
    --shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    --font-main: 'Poppins', sans-serif;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-light);
    margin: 0;
    padding: 0;
    color: var(--text-dark);
    overflow-x: hidden;
}

/* Glassmorphism Classes */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: var(--glass-border);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

/* Navigation */
header {
    background: rgba(255, 255, 255, 0.95);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    text-decoration: none;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 20px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
}

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

.tfn-btn {
    background: var(--accent-color);
    color: white !important;
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: bold;
    box-shadow: 0 4px 15px rgba(255, 64, 129, 0.3);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(255, 64, 129, 0.7); }
    70% { transform: scale(1.05); box-shadow: 0 0 0 10px rgba(255, 64, 129, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(255, 64, 129, 0); }
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0,0,0,0.3), rgba(0,0,0,0.3)), url('images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

/* Booking Form */
.booking-form-container {
    background: white;
    padding: 30px;
    border-radius: 15px;
    max-width: 1000px; /* Wider for flight search bar style */
    margin: -50px auto 50px; /* Overlap hero */
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    position: relative;
    z-index: 10;
}

.booking-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 5px;
}

.form-group input, .form-group select {
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    outline: none;
    transition: border-color 0.3s;
}

.form-group input:focus, .form-group select:focus {
    border-color: var(--primary-color);
}

.submit-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 12px;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s;
    height: 100%; /* Match input height */
    margin-top: 21px; /* Align with inputs */
}

.submit-btn:hover {
    background: var(--secondary-color);
}

/* Content Sections */
.section {
    padding: 60px 10%;
    line-height: 1.8;
}

.section h2 {
    color: var(--secondary-color);
    font-size: 2.2rem;
    margin-bottom: 20px;
    text-align: center;
}

.content-block {
    margin-bottom: 30px;
}

/* Footer */
footer {
    background: #2d3436;
    color: #dfe6e9;
    padding: 50px 10% 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.footer-section h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
}

.footer-section p, .footer-section a {
    color: #b2bec3;
    text-decoration: none;
    margin-bottom: 10px;
    display: block;
}

.footer-bottom {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #444;
}

/* Modal Popup */
.modal {
    display: none; 
    position: fixed; 
    z-index: 2000; 
    left: 0;
    top: 0;
    width: 100%; 
    height: 100%; 
    overflow: auto; 
    background-color: rgba(0,0,0,0.6); 
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: #fefefe;
    margin: 10% auto; 
    padding: 0;
    border: 1px solid #888;
    width: 90%;
    max-width: 500px;
    border-radius: 12px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.3);
    animation: slideDown 0.5s ease-out;
}

@keyframes slideDown {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    margin: 10px 15px;
    cursor: pointer;
}

.close:hover,
.close:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}

.modal-header {
    background: var(--primary-color);
    color: white;
    padding: 20px;
    border-radius: 12px 12px 0 0;
    text-align: center;
}

.modal-body {
    padding: 20px;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .booking-form {
        grid-template-columns: 1fr;
    }

    .submit-btn {
        margin-top: 0;
    }
}