:root {
    --primary: #1E243A; /* Deep blue for trust, inspired by Expedia */
    --primary-light: #2C3E50;
    --accent: #FF6F61; /* Vibrant coral for deals/CTAs */
    --accent-light: #FF8E7A;
    --white: #ffffff;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--primary);
}

/* Container with more whitespace */
.container {
    max-width: 1320px; /* Slightly wider for modern screens */
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Navbar: Cleaner, with shadow for depth */
.navbar {
    background: rgba(30, 36, 58, 0.95); /* Semi-transparent for overlay feel */
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.25rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.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: 1.75rem;
    font-weight: 700;
}

.logo svg {
    width: 36px;
    height: 36px;
    stroke: var(--accent);
}

.contact-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--accent);
    color: var(--white);
    padding: 0.875rem 2rem;
    border: none;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.125rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(255, 111, 97, 0.2);
}

.contact-btn:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(255, 111, 97, 0.3);
}

/* Hero: Taller, with softer gradient for sky feel */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-light) 60%, var(--accent) 100%);
    padding: 10rem 0 5rem;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 4rem; /* Larger for impact */
    line-height: 1.1;
    margin-bottom: 1.75rem;
}

.hero-content p {
    font-size: 1.375rem;
    opacity: 0.95;
    margin-bottom: 2.5rem;
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.feature {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    font-size: 1.125rem;
    font-weight: 500;
}

.feature svg {
    color: var(--white);
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem;
    border-radius: 50%;
    width: 32px;
    height: 32px;
}

.hero-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(15px);
    padding: 2.5rem;
    border-radius: 1.5rem;
    color: var(--white);
    text-align: center;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease;
}

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

.offer-badge {
    background: var(--primary);
    color: var(--white);
    padding: 0.625rem 1.25rem;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.75rem;
}

.hero-card h2 {
    font-size: 2.25rem;
    margin-bottom: 0.75rem;
}

.hero-card p {
    opacity: 0.95;
    margin-bottom: 2.5rem;
    font-size: 1.125rem;
}

/* Airlines: Larger cards, hover effects */
.airlines {
    background: var(--gray-100);
    padding: 6rem 0;
}

.airlines h2 {
    text-align: center;
    font-size: 2.75rem;
    margin-bottom: 4rem;
    color: var(--primary);
}

.airlines-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.airline-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 1.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.airline-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.1);
}

.airline-icon {
    background: var(--accent);
    color: var(--white);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
}

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

.partner-number {
    color: var(--gray-400);
    font-size: 1rem;
}

/* Features: Updated gradient, larger cards */
.features {
    background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent) 100%);
    padding: 6rem 0;
    color: var(--white);
}

.features h2 {
    text-align: center;
    font-size: 2.75rem;
    margin-bottom: 4rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.feature-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(15px);
    padding: 2.5rem;
    border-radius: 1.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.15);
}

.feature-card h3 {
    font-size: 1.75rem;
    margin-bottom: 1.25rem;
}

.feature-card p {
    opacity: 0.95;
    font-size: 1.125rem;
}

/* About: Centered, more line height */
.about {
    background: var(--white);
    padding: 6rem 0;
}

.about .container {
    text-align: center;
}

.about h2 {
    font-size: 2.75rem;
    margin-bottom: 2rem;
    color: var(--primary);
}

.about p {
    font-size: 1.25rem;
    color: var(--gray-500);
    max-width: 900px;
    margin: 0 auto;
    line-height: 1.9;
}

/* Footer: Cleaner links */
footer {
    background: var(--primary);
    color: var(--white);
    padding: 4rem 0 7rem;
    position: relative;
    z-index: 999;
}

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

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.25rem;
}

.footer-links a {
    color: var(--gray-300);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.footer-bottom p {
    color: var(--gray-400);
    margin: 0;
    font-size: 0.875rem;
}

/* Sticky CTA: Bolder, with icon scale */
.sticky-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    color: var(--white);
    padding: 1rem;
    text-align: center;
    z-index: 1000;
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.15);
    animation: slideUp 0.6s ease-out;
}

.sticky-cta a {
    color: var(--white);
    font-weight: 700;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    transition: all 0.3s ease;
    font-size: 1.5rem;
}

.sticky-cta a span {
    font-size: 2rem; /* Larger phone for PPC taps */
    white-space: nowrap;
}

.sticky-cta a svg {
    width: 2.5rem;
    height: 2.5rem;
    transition: transform 0.3s ease;
}

.sticky-cta a:hover svg {
    transform: scale(1.1);
}

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

@keyframes pulse {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(255, 111, 97, 0.4); }
    70% { transform: scale(1.05); box-shadow: 0 0 0 12px rgba(255, 111, 97, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(255, 111, 97, 0); }
}

.cta-button {
    animation: pulse 2s infinite;
    font-size: 1.25rem;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    background: var(--accent);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.cta-button:hover {
    background: var(--accent-light);
}

/* Popup: Modernized with better centering */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1999;
    animation: overlayFadeIn 0.5s forwards;
}

.popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--white);
    z-index: 2000;
    overflow: hidden;
    animation: popupIn 0.5s forwards;
    display: flex;
    align-items: center;
    justify-content: center;
}

.popup-close {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    font-size: 2.5rem;
    cursor: pointer;
    color: var(--accent);
    z-index: 2100;
    transition: color 0.3s ease;
}

.popup-close:hover {
    color: var(--primary);
}

.popup-content {
    padding: 3rem;
    text-align: center;
    max-width: 80%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.popup-title {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.popup-phone-number {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent);
    border: 2px solid var(--accent);
    border-radius: 15px;
    padding: 0.75rem 1.5rem;
    margin: 1rem 0;
}

.popup-text {
    font-size: 1.125rem;
    margin: 1rem 0;
    color: var(--gray-500);
}

.popup-call-circle {
    margin: 2rem auto;
    width: 120px;
    height: 120px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    animation: pulsePhone 2s infinite;
    box-shadow: 0 4px 8px rgba(255, 111, 97, 0.3);
}

.popup-call-circle:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 12px rgba(255, 111, 97, 0.4);
}

.popup-call-circle svg {
    width: 60px;
    height: 60px;
    fill: var(--white);
}

.popup-action-text {
    font-size: 2.75rem;
    color: var(--accent);
    font-weight: 700;
}

/* Animations for Popup */
@keyframes overlayFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes popupIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes pulsePhone {
    0% { transform: scale(1); }
    50% { transform: scale(1.04); }
    100% { transform: scale(1); }
}

/* Responsive: Enhanced for PPC mobile conversions */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 1.5rem;
    }

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

    .hero-content h1 {
        font-size: 3rem;
    }

    .feature {
        justify-content: center;
    }

    .sticky-cta {
        padding: 0.75rem;
    }

    .sticky-cta a span {
        font-size: 1.75rem;
    }

    .popup-content {
        padding: 2rem;
        max-width: 90%;
    }

    .popup-phone-number {
        font-size: 1.5rem;
    }

    .popup-action-text {
        font-size: 2rem;
    }
}