:root {
    --color-bg: #0C0F14;
    --color-bg-elevated: #141820;
    --color-bg-card: #1A1F2A;
    --color-surface: #222836;
    --color-border: #2A3040;
    --color-border-subtle: #1E2430;
    --color-text: #E8E9ED;
    --color-text-secondary: #9198A8;
    --color-text-muted: #6B7280;
    --color-accent: #C4713B;
    --color-accent-light: #D4874F;
    --color-accent-glow: rgba(196, 113, 59, 0.15);
    --color-accent-subtle: rgba(196, 113, 59, 0.08);
    --color-signal-blue: #4A8FBF;
    --color-signal-green: #5A9E6F;
    --color-signal-amber: #BF8C4A;
    --color-signal-red: #BF5A4A;
    --font-display: 'Fraunces', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, sans-serif;
    --font-logo: 'Science Gothic', -apple-system, sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
  }

  body {
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
  }

  /* ── Utility ── */
  .container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 32px;
  }

  /* ── Navigation ── */
  nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 20px 0;
    transition: all 0.4s ease;
  }

  nav.scrolled {
    background: rgba(12, 15, 20, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border-subtle);
    padding: 14px 0;
  }

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

  .logo {
    display: flex;
    align-items: center;
    gap: 4px;
    text-decoration: none;
    color: var(--color-text);
  }

  .logo-mark {
    width: 32px;
    height: 32px;
    position: relative;
  }

  .logo-mark svg {
    width: 100%;
    height: 100%;
  }

  .logo-text {
    font-family: var(--font-logo);
    font-size: 14px;
    font-weight: 300;
    letter-spacing: 0.02em;
    text-transform: uppercase;
  }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
    list-style: none;
  }

  .nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.01em;
    transition: color 0.2s;
  }

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

  .btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 6px;
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all 0.25s ease;
  }

  .btn-primary {
    background: var(--color-accent);
    color: #fff;
  }

  .btn-primary:hover {
    background: var(--color-accent-light);
    box-shadow: 0 4px 24px rgba(196, 113, 59, 0.3);
  }

  .btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    padding: 11px 23px;
  }

  .btn-ghost:hover {
    color: var(--color-text);
    border-color: var(--color-text-muted);
  }

  .btn-nav {
    padding: 9px 20px;
    font-size: 13px;
  }

  /* ── Hero ── */
  .hero {
    padding: 180px 0 120px;
    position: relative;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: min(800px, 100vw);
    height: 600px;
    background: radial-gradient(ellipse, var(--color-accent-glow) 0%, transparent 70%);
    pointer-events: none;
  }

  .hero-content {
    max-width: 720px;
    position: relative;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 100px;
    background: var(--color-accent-subtle);
    border: 1px solid rgba(196, 113, 59, 0.2);
    font-size: 13px;
    font-weight: 500;
    color: var(--color-accent-light);
    margin-bottom: 32px;
  }

  .hero-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-accent);
    animation: pulse-dot 2s ease-in-out infinite;
  }

  @keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
  }

  .hero h1 {
    font-family: var(--font-display);
    font-size: 56px;
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 28px;
    color: var(--color-text);
  }

  .hero h1 em {
    font-style: italic;
    color: var(--color-accent-light);
  }

  .hero-sub {
    font-size: 19px;
    line-height: 1.7;
    color: var(--color-text-secondary);
    max-width: 560px;
    margin-bottom: 44px;
  }

  .hero-actions {
    display: flex;
    align-items: center;
    gap: 16px;
  }

  /* ── Sim Preview ── */
  .sim-preview {
    margin-top: 80px;
    position: relative;
  }

  .sim-window {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.4);
  }

  .sim-titlebar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--color-border-subtle);
    background: var(--color-bg-card);
  }

  .sim-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-surface);
  }

  .sim-titlebar-text {
    margin-left: 8px;
    font-size: 12px;
    color: var(--color-text-muted);
    font-weight: 500;
    letter-spacing: 0.03em;
  }

  .sim-body {
    display: grid;
    grid-template-columns: 260px 1fr 280px;
    min-height: 380px;
  }

  .sim-sidebar {
    border-right: 1px solid var(--color-border-subtle);
    padding: 16px;
  }

  .sim-sidebar-label {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 12px;
  }

  .sim-entity {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 6px;
    margin-bottom: 4px;
    cursor: default;
    transition: background 0.15s;
  }

  .sim-entity:hover {
    background: var(--color-surface);
  }

  .sim-entity-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
  }

  .sim-entity-name {
    font-size: 13px;
    color: var(--color-text-secondary);
    font-weight: 500;
  }

  .sim-entity-role {
    font-size: 11px;
    color: var(--color-text-muted);
  }

  .sim-main {
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .sim-inject {
    padding: 14px 16px;
    border-radius: 8px;
    border-left: 3px solid;
    background: var(--color-bg-card);
    animation: inject-in 0.5s ease-out both;
  }

  .sim-inject:nth-child(1) { animation-delay: 0.8s; }
  .sim-inject:nth-child(2) { animation-delay: 2.2s; }
  .sim-inject:nth-child(3) { animation-delay: 3.6s; }

  @keyframes inject-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .sim-inject-email { border-color: var(--color-signal-blue); }
  .sim-inject-news { border-color: var(--color-signal-amber); }
  .sim-inject-social { border-color: var(--color-signal-red); }

  .sim-inject-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
  }

  .sim-inject-type {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .sim-inject-email .sim-inject-type { color: var(--color-signal-blue); }
  .sim-inject-news .sim-inject-type { color: var(--color-signal-amber); }
  .sim-inject-social .sim-inject-type { color: var(--color-signal-red); }

  .sim-inject-time {
    font-size: 11px;
    color: var(--color-text-muted);
    font-variant-numeric: tabular-nums;
  }

  .sim-inject-content {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.5;
  }

  .sim-inject-sender {
    font-weight: 600;
    color: var(--color-text);
  }

  .sim-feed {
    border-left: 1px solid var(--color-border-subtle);
    padding: 16px;
  }

  .sim-feed-label {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 14px;
  }

  .sim-feed-item {
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border-subtle);
  }

  .sim-feed-item:last-child {
    border-bottom: none;
  }

  .sim-feed-metric {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-bottom: 4px;
  }

  .sim-feed-bar {
    height: 4px;
    border-radius: 2px;
    background: var(--color-surface);
    overflow: hidden;
  }

  .sim-feed-bar-fill {
    height: 100%;
    border-radius: 2px;
    transition: width 1.5s ease;
  }

  /* ── Social Proof Banner ── */
  .proof-banner {
    padding: 48px 0;
    border-top: 1px solid var(--color-border-subtle);
    border-bottom: 1px solid var(--color-border-subtle);
  }

  .proof-inner {
    display: flex;
    align-items: center;
    gap: 24px;
    justify-content: center;
  }

  .proof-line {
    flex: 1;
    max-width: 80px;
    height: 1px;
    background: var(--color-border);
  }

  .proof-text {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    letter-spacing: 0.02em;
    text-align: center;
  }

  /* ── Problem Section ── */
  .problem {
    padding: 120px 0;
    border-top: 1px solid var(--color-border-subtle);
  }

  .section-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 16px;
  }

  .section-heading {
    font-family: var(--font-display);
    font-size: 38px;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
    max-width: 600px;
  }

  .section-sub {
    font-size: 17px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    max-width: 560px;
    margin-bottom: 56px;
  }

  .problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .problem-card {
    padding: 32px 28px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-subtle);
    border-radius: 10px;
    transition: border-color 0.3s;
  }

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

  .problem-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 18px;
  }

  .problem-card h3 {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
  }

  .problem-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.65;
  }

  /* ── How It Works ── */
  .how {
    padding: 120px 0;
    border-top: 1px solid var(--color-border-subtle);
  }

  .how-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px;
    margin-top: 8px;
  }

  .how-step {
    position: relative;
  }

  .how-step-num {
    font-family: var(--font-display);
    font-size: 64px;
    font-weight: 300;
    color: var(--color-surface);
    line-height: 1;
    margin-bottom: 16px;
  }

  .how-step h3 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
  }

  .how-step p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
  }

  /* ── Differentiator ── */
  .diff {
    padding: 120px 0;
    border-top: 1px solid var(--color-border-subtle);
  }

  .diff-table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .diff-table {
    width: 100%;
    min-width: 560px;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 16px;
    font-size: 14px;
  }

  .diff-table thead th {
    padding: 16px 24px;
    text-align: left;
    font-weight: 600;
    font-size: 13px;
    letter-spacing: 0.02em;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
  }

  .diff-table thead th:first-child {
    color: var(--color-text-muted);
  }

  .diff-table thead th.highlight {
    color: var(--color-accent-light);
    background: var(--color-accent-subtle);
    border-radius: 8px 8px 0 0;
  }

  .diff-table tbody td {
    padding: 16px 24px;
    border-bottom: 1px solid var(--color-border-subtle);
    color: var(--color-text-secondary);
  }

  .diff-table tbody td:first-child {
    color: var(--color-text-muted);
    font-weight: 500;
  }

  .diff-table tbody td.highlight {
    background: var(--color-accent-subtle);
    color: var(--color-text);
  }

  .diff-table tbody tr:last-child td.highlight {
    border-radius: 0 0 8px 8px;
  }

  .check { color: var(--color-signal-green); }
  .partial { color: var(--color-signal-amber); }
  .missing { color: var(--color-text-muted); }

  /* ── Use Cases ── */
  .uses {
    padding: 120px 0;
    border-top: 1px solid var(--color-border-subtle);
  }

  .uses-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .use-card {
    padding: 32px 28px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-subtle);
    border-radius: 10px;
    transition: border-color 0.3s;
  }

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

  .use-card-type {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 10px;
  }

  .use-card h3 {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
  }

  .use-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.65;
  }

  /* ── Report Teaser ── */
  .report-teaser {
    padding: 120px 0;
    border-top: 1px solid var(--color-border-subtle);
  }

  .report-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
  }

  .report-features {
    display: flex;
    flex-direction: column;
    gap: 14px;
  }

  .report-feature {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.5;
  }

  .report-feature-icon {
    color: var(--color-accent);
    font-size: 10px;
    margin-top: 4px;
    flex-shrink: 0;
  }

  .report-preview {
    display: flex;
    justify-content: center;
  }

  .report-doc {
    width: 320px;
    background: #F7F6F3;
    border-radius: 8px;
    padding: 28px 24px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3), 0 2px 8px rgba(0,0,0,0.15);
    color: #1A1F2A;
    transform: rotate(1deg);
  }

  .report-doc-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
  }

  .report-doc-logo {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    background: linear-gradient(135deg, #C4713B, #D4874F);
    flex-shrink: 0;
  }

  .report-doc-title {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 700;
    color: #1A1F2A;
  }

  .report-doc-sub {
    font-size: 10px;
    color: #6B7280;
    margin-top: 2px;
  }

  .report-doc-divider {
    height: 2px;
    background: linear-gradient(90deg, #C4713B, transparent);
    margin-bottom: 18px;
    border-radius: 1px;
  }

  .report-doc-section {
    margin-bottom: 18px;
  }

  .report-doc-section-title {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #6B7280;
    margin-bottom: 10px;
  }

  .report-doc-line {
    height: 6px;
    background: #E5E4E0;
    border-radius: 3px;
    margin-bottom: 6px;
  }

  .report-doc-timeline {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .report-doc-event {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
  }

  .report-doc-event-time {
    font-variant-numeric: tabular-nums;
    color: #6B7280;
    font-weight: 600;
    width: 36px;
    flex-shrink: 0;
  }

  .report-doc-event-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
  }

  .report-doc-event-text {
    color: #374151;
  }

  .report-doc-gap {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 11px;
    color: #374151;
    margin-bottom: 8px;
  }

  .report-doc-gap-severity {
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.06em;
    padding: 2px 6px;
    border-radius: 3px;
    flex-shrink: 0;
  }

  .report-doc-gap-severity.high {
    background: rgba(191, 90, 74, 0.15);
    color: #BF5A4A;
  }

  .report-doc-gap-severity.med {
    background: rgba(191, 140, 74, 0.15);
    color: #BF8C4A;
  }

  @media (max-width: 900px) {
    .report-inner { grid-template-columns: 1fr; }
    .report-doc { transform: none; }
  }

  /* ── CTA / Waitlist ── */
  .cta {
    padding: 120px 0;
    border-top: 1px solid var(--color-border-subtle);
    text-align: center;
  }

  .cta-inner {
    max-width: 560px;
    margin: 0 auto;
  }

  .cta h2 {
    font-family: var(--font-display);
    font-size: 38px;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
  }

  .cta p {
    font-size: 17px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 40px;
  }

  .waitlist-form {
    display: flex;
    gap: 10px;
    max-width: 460px;
    margin: 0 auto 16px;
  }

  .waitlist-form input {
    flex: 1;
    padding: 14px 18px;
    border-radius: 6px;
    border: 1px solid var(--color-border);
    background: var(--color-bg-elevated);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
  }

  .waitlist-form input::placeholder {
    color: var(--color-text-muted);
  }

  .waitlist-form input:focus {
    border-color: var(--color-accent);
  }

  .waitlist-note {
    font-size: 13px;
    color: var(--color-text-muted);
  }

  /* ── Footer ── */
  footer {
    padding: 40px 0;
    border-top: 1px solid var(--color-border-subtle);
  }

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

  .footer-copy {
    font-size: 13px;
    color: var(--color-text-muted);
  }

  .footer-links {
    display: flex;
    gap: 24px;
    list-style: none;
  }

  .footer-links a {
    font-size: 13px;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color 0.2s;
  }

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

  /* ── Responsive ── */
  @media (max-width: 900px) {
    .hero h1 { font-size: 40px; }
    .sim-body { grid-template-columns: 1fr; }
    .sim-sidebar, .sim-feed { display: none; }
    .problem-grid, .how-steps { grid-template-columns: 1fr; }
    .diff-table { font-size: 12px; }
    .diff-table thead th, .diff-table tbody td { padding: 12px 14px; }
    .uses-grid { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; align-items: flex-start; }
    .waitlist-form { flex-direction: column; }
    .nav-links { display: none; }
    .section-heading { font-size: 30px; }
    .cta h2 { font-size: 30px; }
  }

  /* ── Animations ── */
  .fade-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }

  .fade-up.visible {
    opacity: 1;
    transform: translateY(0);
  }