/* Base Variables */
:root {
    --bg-color: #ffffff;
    --text-color: #1d1d1f;
    --sub-text-color: #86868b;
    --accent-color: #0071e3;
    --secondary-bg: #f5f5f7;
    --border-color: #d2d2d7;
    --max-width: 1200px;
}

/* Reset & Foundation */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
.nav {
    height: 3rem;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
}

.nav .container {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    text-decoration: none;
    color: var(--text-color);
    letter-spacing: -0.02em;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--sub-text-color);
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-color);
}

/* Hero Section */
.hero {
    padding: 8rem 0;
    text-align: center;
    background-color: var(--bg-color);
}

.hero h1 {
    font-size: 5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 0.5rem;
    animation: fadeInDown 1s ease-out;
}

.hero p {
    font-size: 1.5rem;
    color: var(--sub-text-color);
    font-weight: 300;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-btn {
    margin-top: 2rem;
    animation: fadeInUp 1s ease-out 0.4s both;
}

/* Content Sections */
.section {
    padding: 6rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    letter-spacing: -0.02em;
}

/* Video Grid */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.video-grid.secondary {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.video-placeholder {
    aspect-ratio: 16/9;
    background-color: var(--secondary-bg);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--sub-text-color);
    font-size: 0.9rem;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%;
    /* 16:9 */
    height: 0;
    overflow: hidden;
    border-radius: 12px;
    background: var(--secondary-bg);
    transition: transform 0.3s ease;
}

.video-container:hover {
    transform: scale(1.02);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.video-item {
    display: flex;
    flex-direction: column;
}

.video-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-top: 1rem;
    margin-bottom: 0.2rem;
}

.video-subtitle {
    font-size: 0.9rem;
    color: var(--sub-text-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

/* Forms (Booking Page) */
.form-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 4rem 0;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    background: var(--secondary-bg);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: var(--accent-color);
    color: #fff;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 600;
    transition: opacity 0.3s ease, transform 0.2s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    opacity: 0.9;
}

.btn:active {
    transform: scale(0.98);
}

/* Footer */
.footer {
    padding: 4rem 0;
    text-align: center;
    color: var(--sub-text-color);
    font-size: 0.8rem;
    border-top: 1px solid var(--border-color);
}

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

.social-links a {
    color: var(--sub-text-color);
    transition: color 0.3s ease, transform 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.social-links a:hover {
    color: var(--text-color);
    transform: translateY(-2px);
}

.social-links svg {
    width: 24px;
    height: 24px;
}


/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 3rem;
    }

    .hero p {
        font-size: 1.2rem;
    }

    .video-grid {
        grid-template-columns: 1fr;
    }
}