:root {
    --bg-primary: #0f0f12;
    --bg-secondary: #16161c;
    --bg-card: #1c1c24;
    --bg-card-hover: #22222c;
    --border: #2a2a36;
    --text-primary: #f0f0f5;
    --text-secondary: #a8a8b8;
    --text-muted: #6b6b7b;
    --accent: #72489a;
    --accent-light: #8f5fc0;
    --accent-dark: #652c90;
    --accent-glow: rgba(114, 72, 154, 0.25);
    --cme-accent: #c47a2c;
    --success: #3d9970;
    --error: #c0392b;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --header-height: 72px;
    --container: 1200px;
}

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    margin: 0;
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-secondary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    color: var(--text-primary);
    line-height: 1.2;
    margin: 0 0 1rem;
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); font-weight: 700; }
h2 { font-size: clamp(1.75rem, 3vw, 2.25rem); font-weight: 600; }
h3 { font-size: 1.25rem; font-weight: 600; }

p { margin: 0 0 1rem; }

a {
    color: var(--accent-light);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover { color: #b088d8; }

code {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.875em;
    background: rgba(114, 72, 154, 0.15);
    color: var(--accent-light);
    padding: 0.15em 0.4em;
    border-radius: 4px;
}

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.eyebrow {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-light);
    margin-bottom: 0.75rem;
}

.section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 3rem;
}

.section-lead {
    font-size: 1.125rem;
    color: var(--text-muted);
}

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(15, 15, 18, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-primary);
    font-size: 1.125rem;
}

.nav-brand:hover { color: var(--text-primary); }

.brand-mark {
    width: 36px;
    height: 36px;
    color: var(--accent-light);
}

.brand-text strong { font-weight: 700; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    display: block;
    padding: 0.5rem 0.875rem;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: color 0.2s, background 0.2s;
}

.nav-links a:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-cta {
    background: var(--accent) !important;
    color: #fff !important;
    margin-left: 0.5rem;
}

.nav-cta:hover {
    background: var(--accent-light) !important;
    color: #fff !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: transform 0.3s, opacity 0.3s;
}

/* Hero */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--header-height) + 3rem) 0 4rem;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 50% 0%, var(--accent-glow), transparent),
        linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: linear-gradient(180deg, black 0%, transparent 80%);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-lead {
    font-size: 1.25rem;
    max-width: 640px;
    margin-bottom: 2rem;
    color: var(--text-muted);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3.5rem;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    max-width: 640px;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.stat-value {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-family: var(--font);
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-primary:hover {
    background: var(--accent-light);
    color: #fff;
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.btn-full { width: 100%; }

/* Cards */
.card-grid {
    display: grid;
    gap: 1.5rem;
}

.two-col { grid-template-columns: repeat(2, 1fr); }
.three-col { grid-template-columns: repeat(3, 1fr); }

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    transition: border-color 0.2s, background 0.2s;
}

.card:hover {
    border-color: rgba(114, 72, 154, 0.4);
    background: var(--bg-card-hover);
}

.card-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    background: var(--accent);
    color: #fff;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.card-badge.cme { background: var(--cme-accent); }

.card-subtitle {
    font-size: 0.875rem;
    color: var(--accent-light);
    margin: -0.5rem 0 1rem;
}

.spec-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0;
}

.spec-list li {
    padding: 0.375rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    font-size: 0.9375rem;
}

.spec-list li:last-child { border-bottom: none; }

.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.25rem;
}

.tag {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.25rem 0.625rem;
    background: rgba(114, 72, 154, 0.15);
    color: var(--accent-light);
    border-radius: 999px;
}

/* Feature cards */
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
}

.feature-icon {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--accent-light);
    margin-bottom: 1rem;
    opacity: 0.7;
}

/* Message flow table */
.message-flow {
    margin-top: 2rem;
}

.table-wrap {
    overflow-x: auto;
    margin-top: 1rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9375rem;
}

th, td {
    text-align: left;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
}

th {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

tr:hover td { background: rgba(255, 255, 255, 0.02); }

/* Architecture flow */
.flow-diagram {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 3rem;
    padding: 2rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.flow-step {
    text-align: center;
    flex: 1;
    min-width: 140px;
}

.flow-node {
    background: var(--bg-card);
    border: 1px solid var(--accent);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.875rem;
    padding: 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 0.5rem;
}

.flow-step p {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin: 0;
}

.flow-arrow {
    color: var(--accent);
    font-size: 1.5rem;
    padding-top: 0.75rem;
    flex-shrink: 0;
}

/* Integration highlight */
.integration-card.highlight {
    border-color: var(--accent);
    background: linear-gradient(135deg, rgba(114, 72, 154, 0.12) 0%, var(--bg-card) 100%);
}

/* Specifications */
.spec-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.spec-group {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
}

.spec-group h3 {
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.spec-group dl {
    margin: 0;
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 0.5rem 1rem;
}

.spec-group dt {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.spec-group dd {
    margin: 0;
    color: var(--text-primary);
    font-size: 0.9375rem;
}

/* Trust bar */
.trust-bar {
    text-align: center;
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.trust-bar p {
    margin: 0;
    font-size: 1rem;
    color: var(--text-muted);
}

/* Contact */
.contact {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.contact-details {
    list-style: none;
    padding: 0;
    margin: 2rem 0 0;
}

.contact-details li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
}

.contact-details strong {
    display: block;
    color: var(--text-muted);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
}

.form-row {
    margin-bottom: 1.25rem;
}

.form-row label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.375rem;
}

.form-row input,
.form-row select,
.form-row textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font);
    font-size: 0.9375rem;
    color: var(--text-primary);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: border-color 0.2s;
}

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

.form-row textarea { resize: vertical; min-height: 100px; }

.form-status {
    margin-top: 1rem;
    font-size: 0.9375rem;
    min-height: 1.5rem;
}

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

.contact-form.shake {
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-6px); }
    40%, 80% { transform: translateX(6px); }
}

.hero-lead a {
    color: var(--accent-light);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.hero-lead a:hover {
    color: #b088d8;
}

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem 1.75rem;
    margin-bottom: 1rem;
}

.faq-item h3 {
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
    color: var(--accent-light);
}

.faq-item p {
    margin: 0;
    color: var(--text-secondary);
}

.faq-item a {
    color: var(--accent-light);
}

/* Footer */
.site-footer {
    padding: 3rem 0;
    border-top: 1px solid var(--border);
}

.footer-inner {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1rem;
    align-items: center;
}

.footer-brand p {
    margin: 0.25rem 0 0;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.footer-copy {
    grid-column: 1 / -1;
    margin: 1rem 0 0;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    font-size: 0.8125rem;
    color: var(--text-muted);
    text-align: center;
}

/* Responsive */
@media (max-width: 1024px) {
    .three-col { grid-template-columns: repeat(2, 1fr); }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-toggle { display: flex; }

    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--bg-secondary);
        border-bottom: 1px solid var(--border);
        padding: 1rem;
        gap: 0;
        transform: translateY(-120%);
        opacity: 0;
        transition: transform 0.3s, opacity 0.3s;
        pointer-events: none;
    }

    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav-links a {
        width: 100%;
        padding: 0.875rem 1rem;
    }

    .nav-cta { margin-left: 0; margin-top: 0.5rem; }

    .nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .nav-toggle.open span:nth-child(2) { opacity: 0; }
    .nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

    .two-col,
    .three-col,
    .spec-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .flow-diagram {
        flex-direction: column;
        align-items: center;
    }

    .flow-arrow { transform: rotate(90deg); }

    .footer-inner { grid-template-columns: 1fr; text-align: center; }
    .footer-links { justify-content: center; flex-wrap: wrap; }
}

@media (max-width: 480px) {
    .hero-actions { flex-direction: column; }
    .btn { width: 100%; }
}