:root {
    --bg: #05060a;
    --bg-elevated: #0c0e14;
    --bg-card: #11131c;
    --border: rgba(148, 163, 184, 0.12);
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --primary: #22d3ee;
    --primary-dark: #0891b2;
    --accent: #a855f7;
    --success: #34d399;
    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
    --radius: 14px;
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(5, 6, 10, 0.72);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.1rem;
}

.logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #000;
    font-size: 0.85rem;
    font-weight: 800;
}

.main-nav {
    display: flex;
    gap: 32px;
}

.main-nav a {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s, background 0.2s;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #000;
    box-shadow: 0 4px 24px rgba(34, 211, 238, 0.22);
}

.btn-primary:hover {
    box-shadow: 0 6px 32px rgba(34, 211, 238, 0.32);
}

.btn-secondary {
    background: transparent;
    border-color: var(--border);
    color: var(--text);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.04);
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1rem;
}

/* Hero */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.35;
    animation: float 10s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: var(--primary);
    top: -120px;
    right: -80px;
}

.orb-2 {
    width: 420px;
    height: 420px;
    background: var(--accent);
    bottom: -80px;
    left: -80px;
    animation-delay: -5s;
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 880px;
}

.eyebrow {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.hero h1 {
    font-size: clamp(2.8rem, 7vw, 5rem);
    line-height: 1.05;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.lead {
    color: var(--text-muted);
    font-size: clamp(1.1rem, 2.2vw, 1.35rem);
    max-width: 640px;
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 64px;
}

.hero-stats {
    display: flex;
    gap: 48px;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat strong {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text);
}

.stat span {
    color: var(--text-muted);
    font-size: 0.9rem;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-24px); }
}

/* Sections */
.section {
    padding: 120px 0;
}

.section-dark {
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-header {
    max-width: 720px;
    margin-bottom: 64px;
}

.section-header.narrow {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

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

/* Feature grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(34, 211, 238, 0.25);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: rgba(34, 211, 238, 0.08);
    color: var(--primary);
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-card h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
    font-weight: 700;
}

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

/* Split section */
.split-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.split-section.reversed {
    direction: rtl;
}

.split-section.reversed > * {
    direction: ltr;
}

.split-content h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
}

.split-content p {
    color: var(--text-muted);
    margin-bottom: 20px;
}

.checklist {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: 28px;
}

.checklist li {
    position: relative;
    padding-left: 32px;
    color: var(--text);
}

.checklist li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 6px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: rgba(52, 211, 153, 0.15);
    border: 1px solid var(--success);
}

.checklist li::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 9px;
    width: 5px;
    height: 9px;
    border: solid var(--success);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* Code window */
.code-window {
    background: #07080d;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
}

.code-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border);
}

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

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #22c55e; }

.code-title {
    margin-left: 8px;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-family: var(--font-mono);
}

.code-window pre {
    padding: 24px;
    overflow-x: auto;
}

.code-window code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: #cbd5e1;
    line-height: 1.7;
}

/* Research */
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.research-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
}

.research-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    background: rgba(168, 85, 247, 0.12);
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 16px;
}

.research-card h3 {
    font-size: 1.25rem;
    margin-bottom: 10px;
    font-weight: 700;
}

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

/* Values */
.values-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.value {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.value:last-child {
    padding-bottom: 0;
    border-bottom: none;
}

.value strong {
    font-size: 1.1rem;
}

.value span {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* CTA */
.cta-section {
    text-align: center;
    background:
        radial-gradient(ellipse at top, rgba(34, 211, 238, 0.08), transparent 60%),
        var(--bg);
}

.cta-content {
    max-width: 720px;
}

.cta-content h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 16px;
}

.contact-form {
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    text-align: left;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    border-radius: 10px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text);
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.1);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--text-muted);
}

.contact-form button {
    align-self: flex-start;
}

.form-status {
    min-height: 1.5em;
    font-size: 0.95rem;
}

.form-status.success {
    color: var(--success);
}

.form-status.error {
    color: #f87171;
}

/* Footer */
.site-footer {
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
    padding: 64px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand p {
    color: var(--text-muted);
    margin-top: 16px;
    max-width: 260px;
}

.footer-nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-nav div {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-nav strong {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text);
    margin-bottom: 4px;
}

.footer-nav a {
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: color 0.2s;
}

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

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 900px) {
    .main-nav, .header-actions {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .split-section {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-nav {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .hero-stats {
        gap: 24px;
    }

    .feature-grid, .research-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-nav {
        grid-template-columns: 1fr;
    }
}