:root {
    --bg-dark: #050505;
    --accent: #38ff42;
    --accent-glow: rgba(56, 255, 66, 0.3);
    --text-main: #ffffff;
    --text-dim: #a0a0a0;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

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

.main-wrapper {
    position: relative;
    min-height: 100vh;
}

/* Header & Background */
.header {
    background: linear-gradient(to bottom, rgba(5,5,5,0.7), rgba(5,5,5,0.9)), url(../images/bg.jpg);
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 6%;
    backdrop-filter: blur(10px);
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
}

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

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

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

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

/* Hero Content */
.hero-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 6%;
    text-align: center;
}

#introduction h1 {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

#introduction h1 span {
    color: var(--accent);
    text-shadow: 0 0 30px var(--accent-glow);
}

#introduction p {
    color: var(--text-dim);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 2.5rem;
    line-height: 1.6;
}

/* Buttons */
.cta-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.btn {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 0.95rem;
}

.btn-primary {
    background: var(--accent);
    color: #000;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px var(--accent-glow);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-main);
}

.btn-outline:hover {
    background: var(--glass-bg);
    border-color: var(--text-main);
}

/* Expandable Content */
.expand-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-out;
    max-width: 600px;
    margin: 0 auto;
}

.expand-content.active {
    max-height: 300px;
}

.inner-expand {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 2rem;
    border-radius: 20px;
    margin-top: 2rem;
    backdrop-filter: blur(5px);
}

.inner-expand p {
    margin-bottom: 1rem !important;
    font-size: 0.95rem !important;
}

/* Image Showcase */
.image-showcase {
    padding: 2rem 0 5rem;
    position: relative;
    display: flex;
    justify-content: center;
}

.image-container {
    width: 90%;
    max-width: 800px;
    height: 400px;
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--glass-border);
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

.image-container img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 1s ease-in-out, transform 10s linear;
}

.image-container img.active {
    opacity: 1;
    transform: scale(1.1);
}

.showcase-glow {
    position: absolute;
    bottom: -50px;
    width: 70%;
    height: 100px;
    background: var(--accent);
    filter: blur(100px);
    opacity: 0.2;
    z-index: -1;
}

/* Mobile Toggle */
.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.navbar-toggle .bar {
    width: 25px;
    height: 2px;
    background: var(--text-main);
    transition: var(--transition);
}

/* Responsive */
@media (max-width: 850px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(5, 5, 5, 0.95);
        flex-direction: column;
        padding: 2rem;
        text-align: center;
        border-bottom: 1px solid var(--glass-border);
    }

    .nav-links.active {
        display: flex;
    }

    .navbar-toggle {
        display: flex;
    }

    .image-container {
        height: 300px;
    }
}