:root {
    --primary-color: #00d4ff;
    --secondary-color: #7b2cbf;
    --accent-color: #ff007a;
    --dark-bg: #0a0a0a;
    --light-bg: #ffffff;
    --text-light: #e0e0e0;
    --text-dark: #333333;
    --card-bg-dark: #1a1a1a;
    --card-bg-light: #f5f5f5;
    --font-main: 'Inter', sans-serif;
    --font-heading: 'Space Grotesk', sans-serif;
    --transition: all 0.3s ease;
    --glow: 0 0 10px rgba(0, 212, 255, 0.5);
}

[data-theme="light"] {
    --bg-color: var(--light-bg);
    --text-color: var(--text-dark);
    --card-bg: var(--card-bg-light);
    --nav-bg: rgba(255, 255, 255, 0.9);
}

[data-theme="dark"] {
    --bg-color: var(--dark-bg);
    --text-color: var(--text-light);
    --card-bg: var(--card-bg-dark);
    --nav-bg: rgba(10, 10, 10, 0.9);
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: var(--transition);
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-block;
    padding: 10px 25px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: var(--glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.8);
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.5rem;
    background: linear-gradient(to right, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

/* Top Bar */
.top-bar {
    background: linear-gradient(90deg, #111, #222);
    color: white;
    padding: 8px 0;
    font-size: 0.9rem;
    overflow: hidden;
    white-space: nowrap;
    position: relative;
    z-index: 1001;
}

.marquee {
    display: inline-block;
    animation: marquee 20s linear infinite;
}

@keyframes marquee {
    0% {
        transform: translateX(100%);
    }

    100% {
        transform: translateX(-100%);
    }
}

/* Header */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--nav-bg);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 15px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    height: 40px;
}

.logo-text h1 {
    font-size: 1.2rem;
    font-weight: 700;
    line-height: 1.2;
}

.logo-text span {
    font-size: 0.8rem;
    opacity: 0.8;
    font-family: var(--font-main);
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    font-weight: 500;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.2rem;
    cursor: pointer;
}

.mobile-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    left: -100%;
    width: 80%;
    height: 100vh;
    background: var(--card-bg);
    z-index: 1002;
    padding: 20px;
    transition: var(--transition);
    box-shadow: 5px 0 15px rgba(0, 0, 0, 0.3);
}

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

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.mobile-nav-links a {
    font-size: 1.1rem;
    padding: 10px;
    border-radius: 8px;
}

.mobile-nav-links a:hover,
.mobile-nav-links a.active {
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary-color);
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1001;
    display: none;
}

.overlay.active {
    display: block;
}

/* Hero Section */
.hero {
    padding: 100px 0;
    text-align: center;
    background: radial-gradient(circle at center, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
    position: relative;
    overflow: hidden;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 30px;
    opacity: 0.9;
}

/* Video Grid */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    padding: 50px 0;
}

.video-card {
    background: var(--card-bg);
    border-radius: 15px;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.video-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border-color: var(--primary-color);
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
}

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

.video-info {
    padding: 20px;
}

.video-info h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
}

/* Footer */
footer {
    background: #050505;
    color: #fff;
    padding: 60px 0 20px;
    margin-top: 50px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    margin-bottom: 20px;
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: rotate(360deg);
}

.bottom-bar {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    opacity: 0.7;
}

/* Mobile Bottom Nav */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--card-bg);
    padding: 10px 0;
    box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    justify-content: space-around;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 0.75rem;
    gap: 5px;
    opacity: 0.7;
}

.nav-item.active {
    color: var(--primary-color);
    opacity: 1;
}

.nav-item i {
    font-size: 1.2rem;
}

/* Contact Page */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.contact-form {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.form-group {
    margin-bottom: 20px;
}

.form-control {
    width: 100%;
    padding: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-color);
    font-family: var(--font-main);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Responsive */
@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-toggle {
        display: block;
    }

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

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

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

    footer {
        display: none;
        /* Hidden on mobile as per requirements */
    }

    .bottom-nav {
        display: flex;
    }

    body {
        padding-bottom: 60px;
        /* Space for bottom nav */
    }
}