:root {
    --bg-color: #020a1a;
    --primary-cyan: #00ffff;
    --glow-cyan: rgba(0, 255, 255, 0.75);
    --primary-blue: #0a7d9b;
    --light-blue: #87ceeb;
    --text-color: #e0f7fa;
    --text-muted: #b0c4de;
    --header-height: 70px;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Rajdhani', sans-serif;
    margin: 0;
    padding-top: var(--header-height);
}

.background-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.rail {
    position: absolute;
    width: 2px;
    height: 150%;
    background: linear-gradient(0deg, transparent, var(--primary-cyan), transparent);
    animation: moveRail 20s linear infinite;
    filter: drop-shadow(0 0 5px var(--glow-cyan));
}
.rail:nth-child(1) { left: 10%; animation-delay: -2s; animation-duration: 18s; }
.rail:nth-child(2) { left: 20%; animation-delay: -5s; animation-duration: 22s; }
.rail:nth-child(3) { left: 30%; animation-delay: -8s; animation-duration: 15s; }
.rail:nth-child(4) { left: 40%; animation-delay: -1s; animation-duration: 25s; }
.rail:nth-child(5) { left: 50%; animation-delay: -10s; animation-duration: 19s; }
.rail:nth-child(6) { left: 60%; animation-delay: -12s; animation-duration: 21s; }
.rail:nth-child(7) { left: 70%; animation-delay: -15s; animation-duration: 17s; }
.rail:nth-child(8) { left: 80%; animation-delay: -3s; animation-duration: 24s; }
.rail:nth-child(9) { left: 90%; animation-delay: -6s; animation-duration: 16s; }

@keyframes moveRail {
    0% { transform: translateY(-25%) rotate(15deg); }
    100% { transform: translateY(125%) rotate(15deg); }
}

@keyframes lightning-flash {
    0%, 100% { background-color: transparent; }
    50% { background-color: rgba(10, 125, 155, 0.2); }
}

.background-container::after {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: transparent;
    animation: lightning-flash 15s infinite;
}

.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5%;
    background: rgba(2, 10, 26, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--primary-blue);
    z-index: 100;
    box-sizing: border-box;
}

.logo {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--primary-cyan);
    text-shadow: 0 0 8px var(--glow-cyan);
}

nav a {
    font-family: 'Orbitron', sans-serif;
    color: var(--text-color);
    text-decoration: none;
    margin: 0 1rem;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    padding: 0.5rem 1rem;
    border: 1px solid transparent;
    transition: all 0.3s ease;
    border-radius: 0.5rem;
}

nav a:hover, nav a.active {
    color: var(--primary-cyan);
    text-shadow: 0 0 10px var(--glow-cyan);
    border-color: var(--primary-cyan);
}

.content-container {
    padding: 0 10%;
}

.content-section {
    min-height: calc(100vh - var(--header-height));
    padding: 6rem 2rem;
    border-bottom: 1px solid rgba(10, 125, 155, 0.3);
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.section-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary-cyan);
    text-transform: uppercase;
    margin-bottom: 2rem;
    animation: thunder-glow 3s infinite alternate;
}

@keyframes thunder-glow {
    from { text-shadow: 0 0 10px #00bfff, 0 0 20px #00bfff, 0 0 30px #00bfff; }
    to { text-shadow: 0 0 20px #87ceeb, 0 0 30px #87ceeb, 0 0 40px #87ceeb; }
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    line-height: 1.6;
    max-width: 800px;
    margin-bottom: 2rem;
}

.download-grid {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.download-card {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    background: rgba(10, 125, 155, 0.1);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--primary-blue);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
}

.card-content {
    flex: 1.5;
}

.card-content h3 {
    font-family: 'Orbitron', sans-serif;
    color: var(--light-blue);
    font-size: 1.75rem;
    margin-top: 0;
    margin-bottom: 1rem;
}

.card-content p {
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 2rem;
}

.card-image {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-image img {
    width: 100%;
    max-width: 400px;
    border-radius: 0.5rem;
    border: 1px solid var(--primary-cyan);
    box-shadow: 0 0 15px var(--glow-cyan);
}

.download-button {
    font-family: 'Orbitron', sans-serif;
    font-size: 1rem;
    color: var(--bg-color);
    background-color: var(--primary-cyan);
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 0.5rem;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
    box-shadow: 0 0 15px var(--glow-cyan), inset 0 0 5px white;
    transition: all 0.3s ease;
}

.download-button:hover {
    transform: scale(1.05);
    box-shadow: 0 0 25px var(--glow-cyan), inset 0 0 10px white;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 1200px;
}

.about-content h2 {
    font-family: 'Orbitron', sans-serif;
    color: var(--light-blue);
    margin-bottom: 1rem;
}