/* Direction A: Modern Minimal
   Colors: Slate gray + Emerald green
   Style: Clean, flat, sharp corners, generous whitespace
*/

:root {
    /* Primary Colors */
    --primary: #334155;
    --primary-light: #475569;
    --primary-dark: #1e293b;

    /* Accent Colors */
    --accent: #10B981;
    --accent-light: #34D399;
    --accent-dark: #059669;

    /* Neutrals */
    --white: #FFFFFF;
    --gray-50: #F8FAFC;
    --gray-100: #F1F5F9;
    --gray-200: #E2E8F0;
    --gray-300: #CBD5E1;
    --gray-400: #94A3B8;
    --gray-500: #64748B;
    --gray-700: #334155;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--gray-50);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Navbar: Solid slate, clean design */
.navbar {
    background: var(--primary);
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
}

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

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

.logo svg {
    width: 32px;
    height: 32px;
    stroke: var(--accent);
}

.contact-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--accent);
    color: var(--white);
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.2s ease;
}

.contact-btn:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
}

/* Hero: Solid slate background */
.hero {
    background: var(--primary);
    padding: 6rem 0 5rem;
    min-height: 85vh;
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    color: var(--white);
}

.hero-content h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    font-weight: 800;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1rem;
    font-weight: 500;
}

.feature svg {
    color: var(--accent);
    flex-shrink: 0;
}

/* Hero Card: White with border, flat design */
.hero-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 4px;
    text-align: center;
    border: 1px solid var(--gray-200);
}

.offer-badge {
    display: inline-block;
    background: var(--primary);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero-card h2 {
    font-size: 2rem;
    margin-bottom: 0.75rem;
    color: var(--gray-700);
}

.hero-card .offer-ends {
    color: var(--gray-500);
    margin-bottom: 2rem;
    font-size: 1rem;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: var(--accent);
    color: var(--white);
    padding: 1rem 2rem;
    border-radius: 4px;
    font-size: 1.125rem;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.2s ease;
    width: 100%;
}

.cta-button:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
}

/* Airlines Section: Light background, flat cards */
.airlines {
    background: var(--white);
    padding: 5rem 0;
}

.airlines h2 {
    text-align: center;
    font-size: 2.25rem;
    margin-bottom: 3rem;
    color: var(--gray-700);
}

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

.airline-card {
    background: var(--gray-50);
    padding: 2rem;
    border-radius: 4px;
    border: 1px solid var(--gray-200);
    transition: all 0.2s ease;
}

.airline-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.airline-icon {
    background: var(--accent);
    color: var(--white);
    width: 48px;
    height: 48px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.airline-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--gray-700);
}

.partner-number {
    color: var(--gray-400);
    font-size: 0.875rem;
}

/* About Section */
.about {
    background: var(--gray-50);
    padding: 5rem 0;
}

.about .container {
    text-align: center;
    max-width: 800px;
}

.about h2 {
    font-size: 2.25rem;
    margin-bottom: 1.5rem;
    color: var(--gray-700);
}

.about p {
    font-size: 1.125rem;
    color: var(--gray-500);
    line-height: 1.8;
}

/* Features Section: Slate background, flat cards */
.features-section {
    background: var(--primary);
    padding: 5rem 0;
    color: var(--white);
}

.features-section h2 {
    text-align: center;
    font-size: 2.25rem;
    margin-bottom: 3rem;
}

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

.feature-card {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.2s ease;
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.feature-card p {
    opacity: 0.9;
    font-size: 1rem;
}

/* Footer */
footer {
    background: var(--primary-dark);
    color: var(--white);
    padding: 3rem 0 6rem;
}

.footer-bottom {
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.footer-links a {
    color: var(--gray-300);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--white);
}

.footer-links span {
    color: var(--gray-500);
}

.footer-bottom p {
    color: var(--gray-400);
    font-size: 0.875rem;
}

/* Sticky CTA: Emerald background */
.sticky-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--accent);
    padding: 0.75rem 1rem;
    text-align: center;
    z-index: 1000;
    animation: slideUp 0.3s ease-out;
}

.sticky-cta a {
    color: var(--white);
    font-weight: 700;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
}

.sticky-cta svg {
    width: 1.25rem;
    height: 1.25rem;
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

/* Responsive */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .features-list {
        align-items: center;
    }

    .feature {
        justify-content: center;
    }

    .sticky-cta a span {
        font-size: 1.5rem;
    }
}