/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: #000;
    color: #fff;
    overflow-x: hidden;
}

/* Background Visualizer Canvas */
#visualizerCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -2;
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: radial-gradient(circle at center, transparent 0%, rgba(0,0,0,0.8) 100%);
    z-index: -1;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 50px;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: 2px;
}

.logo span {
    color: #888;
}

nav a {
    color: #fff;
    text-decoration: none;
    margin-left: 30px;
    font-size: 15px;
    font-weight: 600;
    transition: color 0.3s;
}

nav a:hover {
    color: #aaa;
}

.nav-btn {
    border: 1px solid #fff;
    padding: 10px 20px;
    border-radius: 20px;
}

.nav-btn:hover {
    background: #fff;
    color: #000;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 20px;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 60px;
    font-weight: 800;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 4px;
}

.hero p {
    font-size: 18px;
    color: #ccc;
    line-height: 1.6;
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.btn {
    padding: 15px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
}

.btn-primary {
    background: #fff;
    color: #000;
}

.btn-primary:hover {
    background: #e0e0e0;
    transform: translateY(-3px);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 1px solid #fff;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
}

/* Features Section */
.features {
    padding: 100px 50px;
    background: #050505;
    text-align: center;
}

.features h2 {
    font-size: 36px;
    margin-bottom: 60px;
}

.cards-container {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 40px 30px;
    border-radius: 20px;
    width: 300px;
    text-align: center;
    backdrop-filter: blur(10px);
    transition: transform 0.3s, background 0.3s;
}

.card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.05);
}

.card i {
    font-size: 40px;
    margin-bottom: 20px;
    color: #fff;
}

.card h3 {
    font-size: 20px;
    margin-bottom: 15px;
}

.card p {
    color: #888;
    font-size: 14px;
    line-height: 1.5;
}

/* Security Section */
.security {
    padding: 100px 50px;
    background: #000;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.security-content {
    max-width: 700px;
    margin: 0 auto;
}

.security h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

.security p {
    color: #ccc;
    font-size: 18px;
    line-height: 1.6;
}

/* Download Section */
.download {
    padding: 100px 20px 50px;
    text-align: center;
    background: #050505;
}

.download h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

.download p {
    color: #888;
    margin-bottom: 50px;
}

.footer-links {
    margin-top: 50px;
    color: #555;
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 40px; }
    header { padding: 20px; flex-direction: column; gap: 15px; }
    nav a { margin: 0 10px; }
    .hero-buttons { flex-direction: column; }
    .cards-container { flex-direction: column; align-items: center; }
}