:root {
    --bg: #030712;
    --surface: #0f172a;
    --surface-hover: #1e293b;
    --border: #1e293b;
    --text: #f8fafc;
    --text-dim: #94a3b8;
    --accent: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.15);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    border-bottom: 1px solid var(--border);
    background-color: rgba(3, 7, 18, 0.85);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo {
    font-size: 1.25rem;
    font-weight: bold;
    letter-spacing: -0.5px;
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-links a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

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

.nav-btn {
    background: var(--accent);
    color: var(--bg) !important;
    padding: 8px 16px;
    border-radius: 6px;
    font-weight: 600;
    transition: opacity 0.2s;
}

.nav-btn:hover {
    opacity: 0.9;
}

/* Hero Section */
.hero {
    max-width: 900px;
    margin: 80px auto 40px auto;
    text-align: center;
    padding: 0 20px;
}

.hero-badge {
    display: inline-block;
    font-family: monospace;
    font-size: 12px;
    color: var(--accent);
    background: var(--accent-glow);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid rgba(56, 189, 248, 0.3);
    margin-bottom: 20px;
}

.hero h1 {
    font-size: 3.2rem;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.highlight {
    color: var(--accent);
}

.hero p {
    color: var(--text-dim);
    font-size: 1.2rem;
    line-height: 1.6;
    margin-bottom: 30px;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--bg);
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: opacity 0.2s, transform 0.2s;
    border: none;
    font-size: 15px;
}

.btn-primary:hover {
    opacity: 0.95;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text);
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid var(--border);
    transition: background-color 0.2s, border-color 0.2s;
    font-size: 15px;
}

.btn-secondary:hover {
    background-color: var(--surface);
    border-color: var(--text-dim);
}

/* Visualizer 3D */
.visualizer-section {
    max-width: 1000px;
    margin: 40px auto;
    padding: 0 20px;
}

.visualizer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--surface);
    padding: 12px 20px;
    border-top-left-radius: 12px;
    border-top-right-radius: 12px;
    border: 1px solid var(--border);
    border-bottom: none;
}

.visualizer-header h3 {
    margin: 0;
    font-size: 14px;
    color: var(--text);
}

.live-indicator {
    font-family: monospace;
    font-size: 11px;
    color: #34d399;
}

#canvas3d-container {
    width: 100%;
    height: 380px;
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-bottom-left-radius: 12px;
    border-bottom-right-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.6);
}

/* Metrics Section */
.metrics-section {
    max-width: 1000px;
    margin: 60px auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.metric-box {
    background-color: var(--surface);
    border: 1px solid var(--border);
    padding: 24px;
    border-radius: 12px;
    text-align: center;
}

.metric-box h2 {
    margin: 0;
    font-size: 2.2rem;
    color: var(--accent);
}

.metric-box p {
    margin: 8px 0 0 0;
    color: var(--text-dim);
    font-size: 14px;
}

/* Features & Sections */
.features-section, .arch-section, .pricing-section, .contact-section {
    max-width: 1000px;
    margin: 80px auto;
    padding: 0 20px;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.2rem;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-title p {
    color: var(--text-dim);
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.feature-card {
    background-color: var(--surface);
    border: 1px solid var(--border);
    padding: 30px;
    border-radius: 16px;
    transition: transform 0.2s, border-color 0.2s;
}

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

.feature-icon {
    font-size: 28px;
    margin-bottom: 15px;
}

.feature-card h3 {
    margin-top: 0;
    font-size: 1.25rem;
    color: var(--text);
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-dim);
    font-size: 14px;
    line-height: 1.6;
    margin: 0;
}

/* Architecture Steps */
.arch-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 20px;
}

.arch-step {
    background-color: var(--surface);
    border: 1px solid var(--border);
    padding: 24px;
    border-radius: 12px;
    position: relative;
}

.arch-step span {
    font-family: monospace;
    font-size: 2rem;
    color: rgba(56, 189, 248, 0.2);
    font-weight: bold;
    display: block;
    margin-bottom: 10px;
}

.arch-step h4 {
    margin: 0 0 8px 0;
    color: var(--text);
}

.arch-step p {
    margin: 0;
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.5;
}

/* Pricing Grid */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 750px;
    margin: 0 auto;
}

.pricing-card {
    background-color: var(--surface);
    border: 1px solid var(--border);
    padding: 40px 30px;
    border-radius: 20px;
    position: relative;
    display: flex;
    flex-direction: column;
}

.pricing-card.popular {
    border-color: var(--accent);
    box-shadow: 0 10px 30px rgba(56, 189, 248, 0.1);
}

.popular-tag {
    position: absolute;
    top: -12px;
    right: 30px;
    background: var(--accent);
    color: var(--bg);
    font-size: 11px;
    font-weight: bold;
    padding: 4px 12px;
    border-radius: 12px;
    text-transform: uppercase;
}

.pricing-card h3 {
    margin-top: 0;
    font-size: 1.4rem;
}

.price {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--accent);
    margin: 15px 0;
}

.price span {
    font-size: 13px;
    font-weight: normal;
    color: var(--text-dim);
}

.pricing-card p {
    color: var(--text-dim);
    font-size: 14px;
    margin-bottom: 25px;
}

.pricing-card ul {
    list-style: none;
    padding: 0;
    margin: 0 0 30px 0;
    flex: 1;
}

.pricing-card ul li {
    font-size: 14px;
    color: var(--text);
    margin-bottom: 12px;
}

.btn-card {
    background-color: var(--surface-hover);
    color: var(--text);
    text-align: center;
    padding: 12px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.2s;
}

.btn-card:hover {
    background-color: var(--border);
}

/* Contact Form */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 40px;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-form input, .contact-form textarea {
    background: var(--bg);
    border: 1px solid var(--border);
    padding: 14px 16px;
    border-radius: 8px;
    color: var(--text);
    font-family: inherit;
    font-size: 14px;
}

.contact-form input:focus, .contact-form textarea:focus {
    outline: none;
    border-color: var(--accent);
}

/* Footer */
.site-footer {
    background-color: var(--surface);
    border-top: 1px solid var(--border);
    margin-top: auto;
    color: var(--text-dim);
}

.footer-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: 50px 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 40px;
}

.footer-col h4 {
    color: var(--text);
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 1rem;
}

.footer-col p {
    font-size: 13px;
    line-height: 1.6;
    margin: 0;
}

.footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.2s;
}

.footer-col ul li a:hover {
    color: var(--accent);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    text-align: center;
    padding: 25px;
    font-size: 13px;
}

.footer-bottom strong {
    color: var(--accent);
}