:root {
    --primary-color: hsl(210, 100%, 50%);
    --primary-light: hsl(210, 100%, 75%);
    --secondary-color: hsl(190, 80%, 45%);
    --bg-dark: hsl(220, 20%, 5%);
    --bg-light: hsl(220, 20%, 15%);
    --text-main: hsl(0, 0%, 95%);
    --text-muted: hsl(0, 0%, 70%);
    --glass-bg: hsla(220, 20%, 10%, 0.6);
    --glass-border: hsla(0, 0%, 100%, 0.1);
    --card-shadow: 0 8px 32px 0 hsla(0, 0%, 0%, 0.37);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: 0.3s ease;
}

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

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

h1, h2, h3 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
}

/* Glassmorphism Navigation */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 5%;
}

.glass-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    box-shadow: var(--card-shadow);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

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

/* Hero Section */
.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: url('travel_hero_background.png') no-repeat center center/cover;
    padding: 0 5%;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(0,0,0,0.6) 0%, var(--bg-dark) 100%);
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 800px;
}

.hero-content h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-content h1 span {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 10px 20px rgba(0, 119, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(0, 119, 255, 0.4);
}

/* Apps Section */
.apps-section {
    padding: 100px 5%;
    background-color: var(--bg-dark);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.section-header h2 span {
    color: var(--primary-color);
}

.header-line {
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    margin: 0 auto;
    border-radius: 2px;
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.app-card {
    background: var(--bg-light);
    padding: 40px;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    transition: var(--transition-slow);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    opacity: 0;
    transform: translateY(30px);
}

.app-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.app-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    background: hsla(220, 20%, 18%, 1);
}

.app-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.app-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.app-card p {
    color: var(--text-muted);
    margin-bottom: 25px;
    flex-grow: 1;
}

.app-link {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition-fast);
}

.app-link:hover {
    gap: 15px;
}

/* About Section */
.about-section {
    padding: 100px 5%;
    display: flex;
    justify-content: center;
}

.about-card {
    max-width: 900px;
    padding: 60px;
    border-radius: 32px;
    text-align: center;
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
}

.about-card h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.about-card p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto;
}

/* Footer */
footer {
    padding: 50px 5%;
    border-top: 1px solid var(--glass-border);
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.social-links {
    display: flex;
    gap: 20px;
}

.social-links a {
    color: var(--text-muted);
    font-size: 1.25rem;
    transition: var(--transition-fast);
}

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

/* Animations */
.fade-in {
    animation: fadeIn 1s ease forwards;
}

.fade-in-delay {
    opacity: 0;
    animation: fadeIn 1s ease 0.3s forwards;
}

.fade-in-delay-2 {
    opacity: 0;
    animation: fadeIn 1s ease 0.6s forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }
    .nav-links {
        display: none; /* simple mobile nav for now */
    }
    .about-card {
        padding: 40px 20px;
    }
}