/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --airline-blue: #1e7dd8;
    --airline-navy: #1e293b;
    --airline-gray: #f8fafc;
    --airline-light: #3b82f6;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --text-light: #9ca3af;
    --white: #ffffff;
    --border-light: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Navigation */
.navbar {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4rem;
}

.brand-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 0.5rem;
}

.plane-logo {
    width: 2rem;
    height: 2rem;
    background: var(--airline-blue);
    border-radius: 50%;
    position: relative;
}

.plane-logo::before {
    content: '✈';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 1rem;
}

.brand-text {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--airline-navy);
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--airline-navy);
    font-weight: 500;
    padding: 0.5rem 0;
    transition: color 0.3s;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--airline-blue);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--airline-blue);
}

.nav-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* Buttons */
.btn-primary {
    background: var(--airline-blue);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-ghost {
    background: transparent;
    color: var(--airline-navy);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-ghost:hover {
    background: var(--airline-gray);
    color: var(--airline-blue);
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 0.25rem;
}

.mobile-menu-toggle span {
    width: 1.5rem;
    height: 2px;
    background: var(--airline-navy);
    transition: 0.3s;
}

/* Hero Section */
.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    background: url('https://images.unsplash.com/photo-1436491865332-7a61a109cc05?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&h=1080') center/cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
}

.hero-content {
    position: relative;
    text-align: center;
    color: white;
    z-index: 10;
}

.hero-content h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: bold;
    margin-bottom: 1.5rem;
}

.hero-content p {
    font-size: clamp(1rem, 2vw, 1.5rem);
    margin-bottom: 2rem;
    max-width: 3xl;
}

/* Search Section */
.search-section {
    padding: 4rem 0;
    background: var(--airline-gray);
}

.search-header {
    text-align: center;
    margin-bottom: 3rem;
}

.search-header h2 {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--airline-navy);
    margin-bottom: 1rem;
}

.search-card {
    background: white;
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}

.trip-type-selector {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 500;
    color: var(--airline-navy);
}

.radio-option input[type="radio"] {
    accent-color: var(--airline-blue);
}

.search-fields {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.search-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    align-items: end;
}

.field-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.field-group label {
    font-weight: 600;
    color: var(--airline-navy);
}

.input-with-icon {
    position: relative;
}

.field-group input,
.field-group select {
    padding: 0.75rem;
    border: 1px solid var(--border-light);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.field-group input:focus,
.field-group select:focus {
    outline: none;
    border-color: var(--airline-blue);
    box-shadow: 0 0 0 3px rgba(30, 125, 216, 0.1);
}

.plane-icon {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
}

.plane-icon::before {
    content: '✈';
}

.rotate-45 {
    transform: translateY(-50%) rotate(45deg);
}

.rotate-neg-45 {
    transform: translateY(-50%) rotate(-45deg);
}

.search-btn {
    width: 100%;
    justify-content: center;
}

.search-icon::before {
    content: '🔍';
    margin-right: 0.5rem;
}

/* Destinations Section */
.destinations-section {
    padding: 4rem 0;
    background: white;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--airline-navy);
    margin-bottom: 1rem;
}

.destinations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.destination-card {
    position: relative;
    border-radius: 1rem;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s;
}

.destination-card:hover {
    transform: translateY(-4px);
}

.destination-card img {
    width: 100%;
    height: 12rem;
    object-fit: cover;
    transition: transform 0.3s;
}

.destination-card:hover img {
    transform: scale(1.1);
}

.destination-info {
    position: absolute;
    bottom: 1rem;
    left: 1rem;
    color: white;
}

.destination-info h3 {
    font-size: 1.25rem;
    font-weight: bold;
}

/* Features Section */
.features-section {
    padding: 4rem 0;
    background: var(--airline-gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-4px);
}

.feature-icon {
    width: 4rem;
    height: 4rem;
    background: var(--airline-blue);
    border-radius: 50%;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
}

.shield-icon::before { content: '🛡️'; }
.clock-icon::before { content: '🕐'; }
.dollar-icon::before { content: '💲'; }

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--airline-navy);
    margin-bottom: 0.5rem;
}

/* Footer */
.footer {
    background: var(--airline-navy);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.footer-section h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

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

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

.footer-section a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-link {
    width: 2rem;
    height: 2rem;
    background: #374151;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s;
}

.social-link:hover {
    background: var(--airline-blue);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
    color: #9ca3af;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu,
    .nav-actions {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .search-fields {
        grid-template-columns: 1fr;
    }
    
    .search-options {
        grid-template-columns: 1fr;
    }
    
    .trip-type-selector {
        flex-direction: column;
        gap: 1rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .destinations-grid {
        grid-template-columns: 1fr;
    }
}

/* Flight Results Styles */
.flights-page {
    padding: 2rem 0;
    background: var(--airline-gray);
    min-height: 100vh;
}

.flights-container {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.filters-sidebar {
    background: white;
    border-radius: 1rem;
    padding: 1.5rem;
    height: fit-content;
    position: sticky;
    top: 6rem;
    box-shadow: var(--shadow);
}

.filters-sidebar h3 {
    color: var(--airline-navy);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.filter-group {
    margin-bottom: 2rem;
}

.filter-group h4 {
    color: var(--airline-navy);
    margin-bottom: 1rem;
    font-weight: 600;
}

.flight-results {
    space-y: 1rem;
}

.results-header {
    background: white;
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.flight-card {
    background: white;
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.flight-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.flight-info {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: 2rem;
    align-items: center;
}

.airline-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.airline-logo {
    width: 3rem;
    height: 3rem;
    border-radius: 0.5rem;
    object-fit: cover;
}

.flight-route {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: 1rem;
    align-items: center;
    text-align: center;
}

.route-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.route-line {
    flex: 1;
    height: 2px;
    background: var(--airline-blue);
}

.route-plane {
    color: var(--airline-blue);
    font-size: 1rem;
}

.route-plane::before {
    content: '✈';
}

.price-select {
    text-align: right;
}

.price {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--airline-navy);
    margin-bottom: 0.5rem;
}

/* Page Styles */
.page-content {
    padding: 2rem 0;
    min-height: calc(100vh - 200px);
}

.page-header {
    background: var(--airline-navy);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--airline-navy);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-light);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--airline-blue);
    box-shadow: 0 0 0 3px rgba(30, 125, 216, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mt-4 { margin-top: 1rem; }
.p-4 { padding: 1rem; }
.hidden { display: none; }
.block { display: block; }