/* Reset & Base Styles */
:root {
    --primary: #6a11cb;
    --secondary: #2575fc;
    --accent: #00ff88;
    --dark-bg: #0f172a;
    --card-bg: #1e293b;
    --text-light: #f8fafc;
    --text-gray: #94a3b8;
    --gradient: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
}

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

body {
    background-color: var(--dark-bg);
    color: var(--text-light);
    line-height: 1.6;
}

a { text-decoration: none; color: inherit; }
ul, ol { list-style-position: inside; }

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-light);
}

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

nav a {
    margin-left: 20px;
    font-weight: 500;
    transition: 0.3s;
}

nav a:hover { color: var(--secondary); }

/* Hero Section */
.hero {
    background: radial-gradient(circle at center, #1e293b 0%, #0f172a 100%);
    text-align: center;
    padding: 140px 20px 100px;
    position: relative;
    overflow: hidden;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 15px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
}

.hero .subtitle {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.badge {
    background: rgba(37, 117, 252, 0.2);
    color: #60a5fa;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    display: inline-block;
    margin-bottom: 15px;
}

/* CTA Button */
.btn-download {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--gradient);
    color: white;
    padding: 18px 50px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.3rem;
    box-shadow: 0 10px 30px rgba(37, 117, 252, 0.4);
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
}

.btn-download i { margin-right: 10px; }

.btn-subtext {
    font-size: 0.8rem;
    font-weight: 400;
    opacity: 0.9;
    margin-top: 5px;
}

.btn-download:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(37, 117, 252, 0.6);
}

.pulse-anim {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(37, 117, 252, 0.7); }
    70% { box-shadow: 0 0 0 20px rgba(37, 117, 252, 0); }
    100% { box-shadow: 0 0 0 0 rgba(37, 117, 252, 0); }
}

.safe-text {
    margin-top: 15px;
    font-size: 0.9rem;
    color: var(--accent);
}

.hero-waves {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
}

.hero-waves svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 60px;
}

.hero-waves .shape-fill { fill: var(--dark-bg); }

/* Content Sections */
.content-box {
    margin: 40px 0;
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    border: 1px solid rgba(255,255,255,0.05);
}

h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--text-light);
}

.section-title {
    text-align: center;
    margin: 60px 0 30px;
}

p { margin-bottom: 15px; color: var(--text-gray); }

/* Features Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    transition: 0.3s;
    border: 1px solid rgba(255,255,255,0.05);
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--secondary);
}

.card .icon {
    font-size: 2.5rem;
    color: var(--secondary);
    margin-bottom: 20px;
}

.card h3 {
    margin-bottom: 10px;
    font-size: 1.3rem;
}

/* Install Guide */
.steps-container {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
}

.steps-container ol {
    margin-left: 20px;
}

.steps-container li {
    margin-bottom: 15px;
    color: var(--text-gray);
    font-size: 1.1rem;
}

.steps-container strong { color: var(--text-light); }

.tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.tab {
    padding: 10px 20px;
    background: rgba(255,255,255,0.05);
    border-radius: 20px;
    cursor: default;
    color: var(--text-gray);
}

.tab.active {
    background: var(--secondary);
    color: white;
    font-weight: 600;
}

.note {
    background: rgba(255, 193, 7, 0.1);
    border-left: 4px solid #ffc107;
    padding: 15px;
    margin-top: 20px;
    border-radius: 5px;
}

/* Bottom CTA */
.cta-bottom {
    text-align: center;
    padding: 80px 20px;
    background: linear-gradient(to top, #1e293b, var(--dark-bg));
    margin-top: 50px;
    border-radius: 20px;
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    margin-top: 50px;
    color: var(--text-gray);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.2rem; }
    .btn-download { width: 100%; padding: 15px; }
    .nav-container nav { display: none; } /* Simplified for mobile */
    .nav-container { justify-content: center; }
}