:root {
    --background: #0d0e12;
    --background-dark: #121317;
    --card: #1a1b1f;
    --tertiary: #18191d;
    --muted: #22242a;
    --foreground: #cfd6e4;
    --muted-foreground: #878c99;
    --primary: #A8FF53;
    --accent: #826dff;
    --aqua: #479DEC;
    --amber: #f2b84a;
    --orange: #f08a4a;
    --cyan: #4acfd9;
    --border: #2a2c33;
    --border-subtle: rgba(255,255,255,0.06);

    --font-display: "Geist", ui-sans-serif, system-ui, sans-serif;
    --font-body: "Geist", ui-sans-serif, system-ui, sans-serif;
    --font-mono: "Geist Mono", ui-monospace, monospace;
    --font-wordmark: "Syne", ui-sans-serif, system-ui, sans-serif;

    --maxw: 1240px;
  }

  * { box-sizing: border-box; }
  html, body { margin: 0; padding: 0; background: var(--background); color: var(--foreground); }
  body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
  ::selection { background: color-mix(in oklab, var(--primary) 40%, transparent); }

  a { color: inherit; text-decoration: none; }
  p { margin: 0; }

  .wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

  h1, h2, h3, h4 { margin: 0; font-family: var(--font-display); color: var(--foreground); letter-spacing: -0.01em; }
  h1 { font-size: clamp(40px, 5vw, 64px); font-weight: 600; letter-spacing: -0.035em; line-height: 1.04; }
  h2 { font-size: clamp(28px, 3vw, 40px); font-weight: 600; letter-spacing: -0.025em; line-height: 1.1; }
  h3 { font-size: 20px; font-weight: 500; letter-spacing: -0.01em; }
  h4 { font-size: 13px; font-weight: 500; }

  .eyebrow {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--muted-foreground);
    display: inline-flex; align-items: center; gap: 10px;
  }
  .eyebrow .dot { width: 4px; height: 4px; border-radius: 999px; background: var(--primary); box-shadow: 0 0 8px color-mix(in oklab, var(--primary) 70%, transparent); }

  .muted { color: var(--muted-foreground); }
  .mono { font-family: var(--font-mono); }
  code.inline {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: rgba(255,255,255,0.05);
    padding: 1px 6px;
    border-radius: 4px;
  }

  /* Buttons */
  .btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 11px 18px;
    border-radius: 8px;
    font-family: var(--font-display);
    font-size: 14.5px;
    font-weight: 500;
    cursor: pointer;
    transition: background 150ms ease, color 150ms ease, border-color 150ms ease;
    border: 1px solid transparent;
    white-space: nowrap;
    text-align: center;
  }
  .btn-primary { background: var(--primary); color: #0a0b0e; font-weight: 600; }
  .btn-primary:hover { background: color-mix(in oklab, var(--primary) 85%, white); }
  .btn-ghost { color: var(--foreground); border-color: rgba(255,255,255,0.14); background: transparent; }
  .btn-ghost:hover { background: rgba(255,255,255,0.04); border-color: rgba(255,255,255,0.22); }
  .btn-sm { padding: 7px 12px; font-size: 13px; border-radius: 6px; }
  .btn-full { width: 100%; height: 44px; padding: 0 14px; }

  /* Nav */
  .nav-wrap {
    position: sticky; top: 0; z-index: 50;
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    background: color-mix(in oklab, var(--background) 72%, transparent);
    border-bottom: 1px solid transparent;
    transition: border-color 200ms ease;
  }
  .nav-wrap.scrolled { border-bottom-color: var(--border-subtle); }
  .nav {
    display: flex; align-items: center; gap: 32px;
    height: 64px;
  }
  .wordmark {
    font-family: var(--font-wordmark);
    font-weight: 700;
    font-size: 22px;
    letter-spacing: -0.03em;
    color: var(--foreground);
    display: inline-flex; align-items: center; gap: 10px;
  }
  .wordmark .mark {
    width: 22px; height: 22px;
    background: var(--primary);
    border-radius: 5px;
    position: relative; display: inline-block;
    transform: rotate(-8deg);
  }
  .wordmark .mark::before, .wordmark .mark::after {
    content: ""; position: absolute; background: #0a0b0e;
  }
  .wordmark .mark::before { left: 4px; top: 4px; width: 3px; height: 14px; }
  .wordmark .mark::after { left: 7px; top: 10px; width: 11px; height: 3px; transform: rotate(-40deg); transform-origin: 0 50%; }
  .nav-links { display: flex; gap: 4px; margin-left: 16px; }
  .nav-links a {
    font-size: 14px; color: var(--muted-foreground);
    padding: 6px 10px; border-radius: 6px;
    transition: color 150ms, background 150ms;
  }
  .nav-links a:hover { color: var(--foreground); background: rgba(255,255,255,0.04); }
  .nav-links a.active { color: var(--foreground); }
  .nav-spacer { flex: 1; }
  .nav-right { display: flex; align-items: center; gap: 8px; }

  /* Hero */
  .hero {
    padding: 80px 0 28px;
    text-align: center;
  }
  .hero h1 { max-width: 16ch; margin: 14px auto 0; text-wrap: balance;}
  .hero .sub {
    margin: 22px auto 0;
    color: var(--muted-foreground);
    font-size: 18px;
    max-width: 44ch;
  }

  /* Hybrid explainer */
  .hybrid-strip {
    max-width: 880px;
    margin: 48px auto 0;
    padding: 20px 24px;
    border: 1px solid var(--border-subtle);
    background: var(--tertiary);
    border-radius: 12px;
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr;
    align-items: center;
    gap: 18px;
  }
  .hybrid-strip .step {
    display: flex; flex-direction: column; gap: 3px; text-align: left;
  }
  .hybrid-strip .step .k {
    font-family: var(--font-mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.12em;
    color: var(--muted-foreground);
  }
  .hybrid-strip .step .v { color: var(--foreground); font-size: 14px; }
  .hybrid-strip .arrow {
    color: var(--muted-foreground);
    font-family: var(--font-mono); font-size: 14px;
  }
  .hybrid-strip .chip {
    display: inline-flex; align-items: center; gap: 6px;
    font-family: var(--font-mono);
    font-size: 10.5px; color: var(--primary);
    padding: 2px 8px; border-radius: 999px;
    background: color-mix(in oklab, var(--primary) 10%, transparent);
    border: 1px solid color-mix(in oklab, var(--primary) 25%, transparent);
    width: fit-content;
  }
  @media (max-width: 860px) {
    .hybrid-strip { grid-template-columns: 1fr; }
    .hybrid-strip .arrow { transform: rotate(90deg); justify-self: start; padding-left: 4px; }
  }

  /* Billing toggle */
  .toggle-row {
    margin: 40px 0 24px;
    display: flex; justify-content: center;
    gap: 14px;
    align-items: center;
  }
  .seg {
    background: var(--tertiary);
    border: 1px solid var(--border);
    padding: 4px;
    border-radius: 999px;
    display: inline-flex;
    position: relative;
  }
  .seg button {
    background: transparent;
    border: 0;
    font-family: var(--font-display);
    font-size: 13.5px;
    color: var(--muted-foreground);
    padding: 8px 18px;
    border-radius: 999px;
    cursor: pointer;
    transition: color 150ms;
    position: relative; z-index: 1;
    display: inline-flex; align-items: center; gap: 8px;
  }
  .seg button.active {
    color: var(--foreground);
    background: var(--background);
    border: 1px solid var(--border);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.02);
  }
  .seg .save-pill {
    font-family: var(--font-mono);
    font-size: 10.5px;
    padding: 1px 7px;
    border-radius: 999px;
    color: var(--primary);
    background: color-mix(in oklab, var(--primary) 12%, transparent);
    border: 1px solid color-mix(in oklab, var(--primary) 25%, transparent);
  }

  /* Tier cards */
  .tiers {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    align-items: stretch;
    padding-bottom: 8px;
  }
  @media (max-width: 1100px) { .tiers { grid-template-columns: repeat(2, 1fr); } }
  @media (max-width: 680px) { .tiers { grid-template-columns: 1fr; } .tiers .tier-builder { order: -1; } }

  .tier {
    background: var(--card);
    border: 1px solid var(--border-subtle);
    border-radius: 14px;
    padding: 24px;
    display: flex; flex-direction: column; gap: 14px;
    position: relative;
    min-height: 620px;
  }
  .tier-builder {
    border-color: color-mix(in oklab, var(--primary) 45%, transparent);
    background: linear-gradient(180deg, color-mix(in oklab, var(--primary) 3.5%, var(--card)) 0%, var(--card) 40%);
  }
  .tier .popular {
    position: absolute; top: 14px; right: 14px;
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.06em;
    padding: 3px 10px;
    border-radius: 999px;
    color: var(--primary);
    background: color-mix(in oklab, var(--primary) 14%, transparent);
    border: 1px solid color-mix(in oklab, var(--primary) 30%, transparent);
  }
  .tier .name { font-family: var(--font-display); font-size: 17px; font-weight: 500; }
  .tier .subhead { color: var(--muted-foreground); font-size: 14px; min-height: 20px; }
  .tier .price {
    display: flex; align-items: baseline; gap: 4px;
    margin-top: 6px;
  }
  .tier .price .dollar { font-size: 20px; color: var(--foreground); }
  .tier .price .amount { font-size: 44px; font-weight: 600; letter-spacing: -0.03em; color: var(--foreground); line-height: 1; }
  .tier .price .unit { font-size: 14px; color: var(--muted-foreground); margin-left: 6px; align-self: flex-end; margin-bottom: 4px; }
  .tier .price .amount.custom { font-size: 32px; letter-spacing: -0.02em; }
  .tier .save {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--primary);
    min-height: 16px;
  }
  .tier .save.hidden { visibility: hidden; }
  .tier .divider {
    height: 1px;
    background: var(--border-subtle);
    margin: 6px 0 4px;
  }
  .tier ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 9px; }
  .tier ul li {
    font-size: 13.5px;
    color: var(--foreground);
    display: flex; gap: 10px;
    line-height: 1.45;
  }
  .tier ul li::before {
    content: "";
    flex: 0 0 5px;
    width: 5px; height: 5px;
    border-radius: 999px;
    background: color-mix(in oklab, var(--muted-foreground) 70%, transparent);
    margin-top: 8px;
  }
  .tier-builder ul li::before {
    background: var(--primary);
  }
  .tier .fineprint {
    font-size: 11.5px;
    color: color-mix(in oklab, var(--muted-foreground) 80%, transparent);
    font-family: var(--font-mono);
    margin-top: auto;
    padding-top: 12px;
  }
  .tier .spacer { flex: 1; }

  /* Credit explainer */
  .credit-explain {
    text-align: center;
    font-size: 13.5px;
    color: var(--muted-foreground);
    margin: 36px auto 0;
    max-width: 60ch;
  }
  .credit-explain .mono-inline {
    font-family: var(--font-mono); color: var(--foreground);
  }

  /* Section layout */
  section { padding: 96px 0; border-top: 1px solid var(--border-subtle); }
  section.no-top { border-top: 0; padding-top: 0; }

  /* Trial explainer micro-section */
  .trial-explainer {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    margin-top: 48px;
    align-items: stretch;
  }
  @media (max-width: 820px) { .trial-explainer { grid-template-columns: 1fr; } }
  .trial-explainer .pane {
    background: var(--card);
    border: 1px solid var(--border-subtle);
    border-radius: 14px;
    padding: 28px;
  }
  .trial-explainer .pane h3 { margin-bottom: 10px; font-size: 18px; }
  .trial-explainer .pane p { color: var(--muted-foreground); font-size: 14.5px; }
  .trial-explainer .flow {
    margin-top: 22px;
    display: flex; flex-direction: column; gap: 14px;
  }
  .trial-explainer .flow .row {
    display: grid; grid-template-columns: 28px 1fr; gap: 14px; align-items: start;
  }
  .trial-explainer .flow .num {
    font-family: var(--font-mono); font-size: 11px;
    color: var(--muted-foreground);
    border: 1px solid var(--border);
    border-radius: 6px;
    width: 24px; height: 24px;
    display: grid; place-items: center;
    margin-top: 1px;
  }
  .trial-explainer .flow .body { font-size: 14px; color: var(--foreground); }
  .trial-explainer .flow .body .sub { color: var(--muted-foreground); font-size: 13px; display: block; margin-top: 2px; }
  .trial-explainer .rhs {
    background: var(--background-dark);
    background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.04) 1px, transparent 0);
    background-size: 18px 18px;
    position: relative;
    overflow: hidden;
  }
  .locked-card {
    position: relative;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px;
    margin: 0;
    max-width: 320px;
  }
  .locked-card .stripe-top { position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--accent); border-radius: 10px 10px 0 0; }
  .locked-card .lock-badge {
    position: absolute; top: 14px; right: 14px;
    font-family: var(--font-mono);
    font-size: 10.5px;
    padding: 2px 8px;
    border-radius: 999px;
    color: var(--amber);
    background: color-mix(in oklab, var(--amber) 12%, transparent);
    border: 1px solid color-mix(in oklab, var(--amber) 28%, transparent);
  }
  .locked-card .title { font-size: 14px; color: var(--foreground); margin-top: 6px; display:flex; align-items:center; gap: 8px; }
  .locked-card .title .ico {
    width: 18px; height: 18px; border-radius: 5px;
    display: inline-grid; place-items: center;
    background: color-mix(in oklab, var(--accent) 22%, transparent);
    color: var(--accent);
    font-family: var(--font-mono); font-size: 10px;
  }
  .locked-card .sub { color: var(--muted-foreground); font-family: var(--font-mono); font-size: 11px; margin-top: 6px; }
  .locked-card .cta-row {
    display: flex; gap: 8px; margin-top: 16px;
    padding-top: 14px; border-top: 1px solid var(--border-subtle);
  }
  .locked-card .primary-mini {
    font-size: 12px; font-weight: 600; background: var(--primary); color: #0a0b0e;
    padding: 7px 12px; border-radius: 6px; border: 0; cursor: pointer;
  }
  .locked-card .ghost-mini {
    font-size: 12px; color: var(--foreground); padding: 7px 12px; border-radius: 6px;
    border: 1px solid rgba(255,255,255,0.14); background: transparent; cursor: pointer;
  }
  .trial-explainer .rhs-wrap {
    position: relative;
    padding: 28px;
    display: flex; flex-direction: column; gap: 20px;
    min-height: 320px;
  }
  .toast {
    align-self: flex-start;
    background: var(--tertiary);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 14px;
    font-size: 13px;
    max-width: 320px;
    color: var(--foreground);
  }
  .toast .label {
    font-family: var(--font-mono); font-size: 10.5px;
    color: var(--primary);
    letter-spacing: 0.12em; text-transform: uppercase;
    margin-bottom: 4px;
  }
  .toast .body { color: var(--muted-foreground); font-size: 12.5px; }

  /* Add-on strip */
  .addon {
    margin-top: 64px;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    background: var(--tertiary);
  }
  .addon .inner {
    padding: 28px 0;
    display: grid;
    grid-template-columns: 140px 1fr auto;
    align-items: center;
    gap: 32px;
  }
  @media (max-width: 820px) {
    .addon .inner { grid-template-columns: 1fr; gap: 14px; }
  }
  .addon h4 {
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--muted-foreground);
    font-weight: 400;
  }
  .addon .title { color: var(--foreground); font-size: 15px; font-weight: 500; }
  .addon .desc { color: var(--muted-foreground); font-size: 14px; margin-top: 4px; max-width: 72ch; }
  .addon .link {
    color: var(--accent);
    font-size: 14px;
    white-space: nowrap;
  }
  .addon .link:hover { text-decoration: underline; }

  /* Feature comparison table */
  .cmp-wrap {
    margin-top: 44px;
    border: 1px solid var(--border-subtle);
    border-radius: 14px;
    overflow: hidden;
    background: var(--card);
  }
  .cmp {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 13.5px;
  }
  .cmp th, .cmp td {
    padding: 13px 18px;
    text-align: right;
    vertical-align: middle;
    border-bottom: 1px solid var(--border-subtle);
  }
  .cmp th:first-child, .cmp td:first-child {
    text-align: left;
    color: var(--foreground);
  }
  .cmp thead th {
    font-family: var(--font-display);
    font-weight: 500;
    color: var(--foreground);
    position: sticky; top: 64px;
    background: var(--card);
    font-size: 14px;
    border-bottom: 1px solid var(--border);
  }
  .cmp thead th:first-child { color: var(--muted-foreground); font-weight: 400; font-size: 11px; text-transform: uppercase; letter-spacing: 0.14em; }
  .cmp .cat-row td {
    font-family: var(--font-mono);
    font-size: 10.5px;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--muted-foreground);
    padding: 18px 18px 8px;
    border-bottom: 0;
    background: var(--background-dark);
  }
  .cmp .yes { color: var(--foreground); }
  .cmp .no { color: color-mix(in oklab, var(--muted-foreground) 60%, transparent); }
  .cmp .num { font-family: var(--font-mono); color: var(--foreground); font-size: 13px; }
  .cmp .builder-col {
    background: color-mix(in oklab, var(--primary) 4%, transparent);
    border-left: 1px solid color-mix(in oklab, var(--primary) 25%, transparent);
    border-right: 1px solid color-mix(in oklab, var(--primary) 25%, transparent);
  }
  .cmp thead .builder-col { border-top: 2px solid var(--primary); }
  .cmp tbody tr:last-child td { border-bottom: 0; }

  .cmp-scroll { overflow-x: auto; }
  @media (max-width: 820px) {
    .cmp { min-width: 720px; }
  }

  /* FAQ */
  .faq-wrap {
    max-width: 720px;
    margin: 44px auto 0;
  }
  .faq-item {
    border-bottom: 1px solid var(--border-subtle);
  }
  .faq-item:first-child { border-top: 1px solid var(--border-subtle); }
  .faq-item button.q {
    width: 100%; text-align: left;
    background: transparent;
    border: 0;
    color: var(--foreground);
    padding: 22px 0;
    font-family: var(--font-display);
    font-size: 15.5px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
  }
  .faq-item button.q .plus {
    color: var(--muted-foreground);
    font-family: var(--font-mono);
    font-size: 18px;
    width: 20px; text-align: center;
    transition: transform 200ms ease, color 200ms;
  }
  .faq-item.open button.q { color: var(--foreground); }
  .faq-item.open button.q .plus { color: var(--primary); transform: rotate(45deg); }
  .faq-item .a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 260ms ease;
  }
  .faq-item.open .a { max-height: 400px; }
  .faq-item .a-inner {
    padding: 0 0 22px;
    color: var(--muted-foreground);
    font-size: 14.5px;
    line-height: 1.6;
    max-width: 62ch;
  }

  /* Enterprise band */
  .ent-band {
    background: var(--tertiary);
    border-top: 1px solid var(--border-subtle);
    padding: 72px 0;
  }
  .ent-band .row {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 32px;
  }
  @media (max-width: 820px) {
    .ent-band .row { grid-template-columns: 1fr; }
  }
  .ent-band h3 { font-size: 28px; font-weight: 600; letter-spacing: -0.02em; }
  .ent-band p { color: var(--muted-foreground); margin-top: 10px; max-width: 64ch; font-size: 15px; }

  /* Footer */
  footer {
    padding: 72px 0 40px;
    border-top: 1px solid var(--border-subtle);
    background: var(--background-dark);
  }
  .foot-grid { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: 40px; }
  @media (max-width: 900px) { .foot-grid { grid-template-columns: repeat(2, 1fr); } .foot-brand { grid-column: 1 / -1; } }
  .foot-col h4 {
    font-family: var(--font-mono); font-size: 11px;
    text-transform: uppercase; letter-spacing: 0.14em;
    color: var(--muted-foreground); font-weight: 400;
    margin-bottom: 14px;
  }
  .foot-col a {
    display: block;
    font-size: 14px;
    color: var(--foreground);
    padding: 5px 0;
    transition: color 150ms;
  }
  .foot-col a:hover { color: var(--primary); }
  .foot-bottom {
    margin-top: 60px;
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
    display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap;
    font-size: 13px; color: var(--muted-foreground);
  }
  .foot-brand-bio { margin-top: 16px; color: var(--muted-foreground); font-size: 14px; max-width: 38ch; }
/* ===================== Back to top ===================== */
.to-top {
  position: fixed; right: 24px; bottom: 24px; z-index: 60;
  width: 44px; height: 44px; border-radius: 12px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--muted-foreground);
  background: color-mix(in oklab, var(--card) 82%, transparent);
  border: 1px solid var(--border);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  box-shadow: 0 10px 30px -12px rgba(0,0,0,0.8);
  cursor: pointer;
  opacity: 0; transform: translateY(10px); pointer-events: none;
  transition: opacity 220ms ease, transform 220ms ease, color 150ms ease, border-color 150ms ease, box-shadow 220ms ease;
}
.to-top.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.to-top:hover {
  color: var(--foreground);
  border-color: color-mix(in oklab, var(--primary) 50%, var(--border));
  box-shadow: 0 0 0 1px color-mix(in oklab, var(--primary) 22%, transparent), 0 12px 30px -12px rgba(0,0,0,0.85);
}
.to-top:focus-visible {
  outline: none;
  border-color: color-mix(in oklab, var(--primary) 60%, var(--border));
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--primary) 40%, transparent);
}
.to-top svg { width: 18px; height: 18px; }
@media (prefers-reduced-motion: reduce) {
  .to-top { transition: opacity 200ms ease; transform: none; }
  .to-top.show { transform: none; }
}