:root {
    --bg-color: #121212;
    --card-bg: #181818;
    --primary: #1DB954;
    --primary-hover: #1ed760;
    --text-main: #FFFFFF;
    --text-muted: #B3B3B3;
    --nav-height: 80px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    scroll-behavior: smooth;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
nav {
    height: var(--nav-height);
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--primary);
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 600;
    transition: color 0.3s;
}

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

/* Hero Section */
.hero {
    padding-top: calc(var(--nav-height) + 100px);
    padding-bottom: 100px;
    text-align: center;
    background: linear-gradient(180deg, #1db95422 0%, #121212 100%);
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    font-weight: 800;
}

.hero .highlight {
    color: var(--primary);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 3rem;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

/* Buttons */
.btn-primary {
    background-color: var(--primary);
    color: #000;
    padding: 1rem 2.5rem;
    border-radius: 500px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1rem;
    transition: transform 0.2s, background-color 0.2s;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: scale(1.05);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-main);
    padding: 1rem 2.5rem;
    border-radius: 500px;
    text-decoration: none;
    font-weight: 700;
    border: 1px solid var(--text-muted);
    transition: border-color 0.3s, color 0.3s;
}

.btn-secondary:hover {
    border-color: var(--text-main);
}

.btn-small {
    background-color: var(--text-main);
    color: #000;
    padding: 0.5rem 1.5rem;
    border-radius: 500px;
    text-decoration: none;
    font-weight: 700;
    font-size: 0.875rem;
}

/* Features */
.features {
    padding: 100px 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 3rem;
    border-radius: 12px;
    transition: background-color 0.3s;
}

.feature-card:hover {
    background-color: #282828;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-muted);
}

/* Showcase */
.showcase {
    padding: 100px 0;
    background-color: #000;
}

.showcase h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 2.5rem;
}

.video-item {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    padding-bottom: 1.5rem;
}

.video-item video {
    width: 100%;
    aspect-ratio: 16/9;
    background: #000;
    margin-bottom: 1rem;
}

.video-item p {
    padding: 0 1.5rem;
    font-weight: 600;
    color: var(--text-muted);
}

/* Install */
.install {
    padding: 100px 0;
}

.install-flex {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.install-text {
    flex: 1;
}

.install-video {
    flex: 1;
}

.install-video video {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.install h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.install p {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.install ol {
    margin-bottom: 2.5rem;
    padding-left: 1.5rem;
}

.install li {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.install li strong {
    color: var(--text-main);
}

/* Footer */
footer {
    padding: 4rem 0;
    border-top: 1px solid #282828;
    text-align: center;
}

footer p {
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .hero-actions { flex-direction: column; align-items: center; }
    .btn-primary, .btn-secondary { width: 100%; max-width: 300px; }
    .install-flex { flex-direction: column; }
    .video-grid { grid-template-columns: 1fr; }
}