:root {
    --primary-color: #00aaff;
    --dark-bg: #121212;
    --light-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --text-secondary: #a0a0a0;
    --header-height: 70px;
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* --- Header & Navbar --- */
.main-header {
    background-color: rgba(18, 18, 18, 0.8);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid #2a2a2a;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
    padding: 0 2rem;
}

.nav-logo {
    color: var(--primary-color);
    font-size: 1.8rem;
    font-weight: bold;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
}

.nav-item {
    margin-left: 2rem;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.3s ease;
}

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

.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--text-color);
    transition: all 0.3s ease-in-out;
}

/* --- Hero Section --- */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(rgba(18, 18, 18, 0.7), rgba(18, 18, 18, 0.9)), url('https://placehold.co/1920x1080/0000FF/000000?text=VR+Background') no-repeat center center/cover;
    color: #fff;
    padding: 0 1rem;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #fff;
    border: 1px solid var(--primary-color);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--primary-color);
}

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

.content-section h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
}

.section-lead {
    max-width: 700px;
    margin: 0 auto 3rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.bg-dark {
    background-color: var(--dark-bg);
}

/* --- Features Section --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background-color: var(--light-bg);
    padding: 2.5rem;
    border-radius: 8px;
    text-align: center;
    border: 1px solid #2a2a2a;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 170, 255, 0.1);
}

.feature-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

/* --- Gallery Section --- */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-top: 3rem;
}

.gallery-grid img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    object-fit: cover;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.gallery-grid img:hover {
    transform: scale(1.05);
    opacity: 0.8;
}

/* --- Contact Section --- */
.contact-form {
    max-width: 600px;
    margin: 2rem auto 0;
    display: flex;
    flex-direction: column;
}

.contact-form input,
.contact-form textarea {
    background-color: var(--light-bg);
    color: var(--text-color);
    border: 1px solid #2a2a2a;
    border-radius: 5px;
    padding: 1rem;
    margin-bottom: 1rem;
    font-family: inherit;
    font-size: 1rem;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.contact-form button {
    align-self: center;
}

/* --- Footer --- */
.main-footer {
    padding: 2rem 0;
    text-align: center;
    background-color: var(--light-bg);
    border-top: 1px solid #2a2a2a;
}

.main-footer p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.main-footer a {
    color: var(--primary-color);
    text-decoration: none;
}

.main-footer a:hover {
    text-decoration: underline;
}

/* --- Responsive Design --- */
@media(max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: var(--header-height);
        flex-direction: column;
        background-color: var(--light-bg);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-item {
        margin: 1.5rem 0;
    }

    .hamburger {
        display: block;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

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

    .content-section h2 {
        font-size: 2rem;
    }
}