:root {
    --bg-dark: #0a0e17;
    --bg-card: rgba(20, 26, 38, 0.6);
    --primary: #00d2ff;
    --primary-hover: #00b8e6;
    --secondary: #1a2333;
    --secondary-hover: #232f45;
    --text-main: #f0f4f8;
    --text-muted: #94a3b8;
    --gradient-brand: linear-gradient(135deg, #00d2ff 0%, #3a7bd5 100%);
    --glass-border: rgba(255, 255, 255, 0.08);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Background effects */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 50% 50%, rgba(0, 210, 255, 0.05) 0%, transparent 50%);
    z-index: -1;
}

/* Typography */
.text-gradient {
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background: rgba(10, 14, 23, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    height: 40px;
    width: auto;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.3s;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary-sm {
    background: var(--primary);
    color: #000;
    padding: 0.5rem 1.2rem;
    border-radius: 6px;
}

.btn-primary {
    background: var(--gradient-brand);
    color: #fff;
    box-shadow: 0 4px 15px rgba(0, 210, 255, 0.3);
}

.btn-primary:hover, .btn-primary-sm:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 210, 255, 0.4);
}

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

.btn-secondary:hover {
    background: var(--secondary-hover);
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: calc(100vh - 80px);
    padding: 4rem 5%;
    gap: 4rem;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    font-weight: 300;
}

.hero-cta {
    display: flex;
    gap: 1rem;
}

/* Hero Visual (Glass Panel) */
.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    perspective: 1000px;
}

.glass-panel {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    width: 100%;
    max-width: 450px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4), 0 0 0 1px rgba(255,255,255,0.05) inset;
    transform: rotateY(-5deg) rotateX(5deg);
    transition: transform 0.5s ease;
}

.glass-panel:hover {
    transform: rotateY(0deg) rotateX(0deg);
}

.panel-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.dots {
    display: flex;
    gap: 6px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.panel-title {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 600;
}

.panel-body {
    padding: 2rem;
}

.id-section {
    margin-bottom: 2rem;
}

.id-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.id-value {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--primary);
}

.connect-section {
    display: flex;
    gap: 1rem;
}

.input-id {
    flex: 1;
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--glass-border);
    padding: 0.8rem 1rem;
    border-radius: 8px;
    color: #fff;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

.input-id:focus {
    border-color: var(--primary);
}

.btn-connect {
    background: var(--gradient-brand);
    color: #fff;
    padding: 0.8rem 1.5rem;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 5rem 5%;
    background: rgba(10, 14, 23, 0.4);
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    padding: 2rem;
    border-radius: 12px;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 210, 255, 0.3);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Footer */
.footer {
    padding: 3rem 5%;
    border-top: 1px solid var(--glass-border);
    background: rgba(10, 14, 23, 0.9);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-muted);
}

.footer-logo {
    height: 30px;
    filter: grayscale(100%) opacity(0.5);
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

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

/* Responsive */
@media (max-width: 900px) {
    .hero {
        flex-direction: column;
        padding-top: 2rem;
        text-align: center;
    }
    .hero-title {
        font-size: 3rem;
    }
    .hero-cta {
        justify-content: center;
    }
    .nav-links {
        display: none;
    }
    .footer-content {
        flex-direction: column;
        gap: 2rem;
    }
}