/* ========================================================================
     Landing page — single-purpose layout, shares tokens with styles.css
     ======================================================================== */
  body { background: var(--bg); }

  /* ── Top bar ──────────────────────────────────────────────────────── */
  .nav {
    position: sticky; top: 0; z-index: 50;
    background: color-mix(in oklch, var(--bg) 92%, transparent);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line);
  }
  .nav-inner {
    max-width: 1180px; margin: 0 auto;
    padding: 14px 32px;
    display: flex; align-items: center; justify-content: space-between;
  }
  .nav .brand { display: flex; align-items: center; gap: 10px; }
  .nav .brand .mark {
    width: 26px; height: 26px;
    background: var(--ink); color: var(--bg);
    font-family: var(--mono); font-weight: 700; font-size: 13px;
    display: grid; place-items: center;
    border-radius: 6px;
  }
  .nav .brand .name { font-weight: 600; font-size: 16px; }
  .nav .brand .sub {
    font-family: var(--mono); font-size: 12px;
    color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em;
    margin-left: 8px; padding-left: 10px;
    border-left: 1px solid var(--line);
  }
  .nav .links { display: flex; align-items: center; gap: 6px; }
  .nav .link {
    font-family: var(--mono); font-size: 13px;
    color: var(--ink-2); text-transform: uppercase; letter-spacing: 0.08em;
    padding: 8px 12px; border-radius: var(--radius);
  }
  .nav .link:hover { background: var(--surface-3); text-decoration: none; }
  .nav .discord-link { gap: 7px; }
  .nav .discord-mark {
    width: 17px; height: 17px;
    background: color-mix(in oklch, var(--accent-soft) 55%, var(--surface));
  }

  /* ── Page container ───────────────────────────────────────────────── */
  .page { max-width: 1180px; margin: 0 auto; padding: 0 32px; }

  /* ── Section frame ────────────────────────────────────────────────── */
  .section { padding: 88px 0; border-bottom: 1px solid var(--line); }
  .section:last-of-type { border-bottom: 0; }
  .section-tag {
    font-family: var(--mono); font-size: 13px; font-weight: 500;
    color: var(--muted); text-transform: uppercase; letter-spacing: 0.12em;
    margin: 0 0 14px;
    display: flex; align-items: center; gap: 10px;
  }
  .section-tag::before {
    content: ''; width: 18px; height: 1px; background: var(--ink);
  }
  .section-tag::after { content: attr(data-num); margin-left: auto; color: var(--muted-2); }
  .section-title {
    font-size: clamp(28px, 3.6vw, 42px);
    line-height: 1.1; margin: 0 0 12px;
    font-weight: 600; letter-spacing: -0.02em;
    text-wrap: pretty;
  }
  .section-lead {
    font-size: 18px; color: var(--ink-3);
    line-height: 1.6; max-width: 640px; margin: 0;
  }

  /* ── Hero ────────────────────────────────────────────────────────── */
  .hero { padding: 96px 0 80px; }
  .hero-grid {
    display: grid; grid-template-columns: 1.4fr 1fr; gap: 56px;
    align-items: end;
  }
  .hero h1 {
    font-size: clamp(40px, 6vw, 76px);
    line-height: 1.02; letter-spacing: -0.035em;
    font-weight: 600; margin: 0 0 18px;
    text-wrap: balance;
  }
  .hero h1 em {
    font-style: normal; color: var(--accent-ink);
    background-image: linear-gradient(transparent 70%, var(--accent-soft) 70%);
    background-size: 100% 100%; background-repeat: no-repeat;
    padding: 0 6px; margin: 0 -6px;
  }
  .hero-sub {
    font-size: 20px; color: var(--ink-3);
    line-height: 1.6; max-width: 520px; margin: 0 0 28px;
  }
  .hero-cta { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
  .btn-lg {
    background: var(--ink); color: #fff; border: 1px solid var(--ink);
    padding: 13px 22px; border-radius: var(--radius);
    font-family: var(--sans); font-size: 16px; font-weight: 500;
    cursor: pointer; text-decoration: none;
    display: inline-flex; align-items: center; gap: 8px;
  }
  .btn-lg:hover { background: var(--ink-2); border-color: var(--ink-2); text-decoration: none; }
  .btn-lg.ghost {
    background: transparent; color: var(--ink); border-color: var(--line-2);
  }
  .btn-lg.ghost:hover { background: var(--surface-3); border-color: var(--line-strong); }
  .hero-meta {
    margin-top: 28px;
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 0;
    border-top: 1px solid var(--line);
    padding-top: 18px;
  }
  .hero-meta div { padding-right: 18px; }
  .hero-meta div + div { border-left: 1px solid var(--line); padding-left: 18px; }
  .hero-meta .num {
    font-family: var(--mono); font-size: 25px; font-weight: 500;
    color: var(--ink); letter-spacing: -0.01em;
    font-feature-settings: 'tnum';
  }
  .hero-meta .label {
    font-family: var(--mono); font-size: 12px; font-weight: 500;
    color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em;
    margin-top: 4px;
  }

  /* ── Hero terminal preview ───────────────────────────────────────── */
  .term {
    background: #14140f; color: #d8d6cf;
    border-radius: var(--radius);
    font-family: var(--mono); font-size: 14px; line-height: 1.7;
    overflow: hidden;
    box-shadow: 0 1px 0 var(--line), 18px 18px 0 var(--tint);
  }
  .term-head {
    background: #1c1c16; padding: 8px 14px;
    display: flex; align-items: center; justify-content: space-between;
    border-bottom: 1px solid #25241d;
    font-family: var(--mono); font-size: 12px;
    color: oklch(0.65 0.01 248); text-transform: uppercase; letter-spacing: 0.1em;
  }
  .term-head .dots { display: flex; gap: 5px; }
  .term-head .dot { width: 9px; height: 9px; border-radius: 50%; background: oklch(0.30 0.01 248); }
  .term-body { padding: 16px 18px; min-height: 280px; }
  .term-body .prompt { color: var(--accent); }
  .term-body .cmd { color: #f4f1e6; }
  .term-body .out { color: #a8a59a; }
  .term-body .ok  { color: oklch(0.70 0.13 148); }
  .term-body .warn{ color: oklch(0.78 0.14 75); }
  .term-body .row { white-space: pre; }
  .term-cursor { display: inline-block; width: 7px; height: 14px; background: var(--accent); animation: blink 1.1s infinite; vertical-align: middle; margin-left: 2px; }
  @keyframes blink { 0%,49%{opacity:1;} 50%,100%{opacity:0;} }

  /* ── What it does (feature grid) ─────────────────────────────────── */
  .feat-grid {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 0;
    margin-top: 36px;
    border-top: 1px solid var(--line);
    border-left: 1px solid var(--line);
  }
  .feat {
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 24px;
    background: var(--surface);
    position: relative;
  }
  .feat .num {
    font-family: var(--mono); font-size: 12px;
    color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em;
    margin-bottom: 14px;
  }
  .feat h3 {
    font-size: 20px; font-weight: 600; margin: 0 0 6px;
    letter-spacing: -0.01em;
  }
  .feat p {
    font-size: 15px; color: var(--ink-3);
    line-height: 1.6; margin: 0;
  }
  .feat .icon-row {
    margin-top: 16px; padding-top: 14px;
    border-top: 1px dashed var(--line);
    font-family: var(--mono); font-size: 12px;
    color: var(--muted-2); text-transform: uppercase; letter-spacing: 0.08em;
    display: flex; gap: 10px; flex-wrap: wrap;
  }
  .feat .icon-row span { color: var(--ink-3); }

  /* ── How it works ────────────────────────────────────────────────── */
  .steps-row {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 24px; margin-top: 40px;
    counter-reset: step;
  }
  .step-block {
    border-top: 2px solid var(--ink);
    padding-top: 18px;
    position: relative;
  }
  .step-block::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    position: absolute; top: 18px; right: 0;
    font-family: var(--mono); font-size: 13px;
    color: var(--muted); letter-spacing: 0.04em;
  }
  .step-block .label {
    font-family: var(--mono); font-size: 12px;
    color: var(--accent-ink); text-transform: uppercase; letter-spacing: 0.1em;
    margin-bottom: 10px;
  }
  .step-block h4 {
    font-size: 20px; font-weight: 600; margin: 0 0 8px;
    letter-spacing: -0.01em;
  }
  .step-block p {
    font-size: 15px; color: var(--ink-3); line-height: 1.6; margin: 0;
  }

  /* ── Sample task preview ─────────────────────────────────────────── */
  .preview-grid {
    display: grid; grid-template-columns: 1fr 1.2fr; gap: 32px;
    margin-top: 40px; align-items: stretch;
  }
  .task-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    font-size: 15px;
    color: var(--ink-2);
    line-height: 1.65;
  }
  .task-card .crumb {
    font-family: var(--mono); font-size: 12px;
    color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em;
    margin-bottom: 10px;
  }
  .task-card h4 {
    margin: 0 0 12px; font-size: 20px; font-weight: 600;
    letter-spacing: -0.01em;
  }
  .task-card .ssh {
    background: var(--ink); color: #d8d6cf;
    font-family: var(--mono); font-size: 14px;
    padding: 6px 10px; border-radius: var(--radius);
    display: inline-flex; align-items: center; gap: 8px;
    margin-bottom: 14px;
  }
  .task-card .ssh::before { content: '$'; color: var(--accent); }
  .task-card .body code {
    background: var(--surface-3); color: var(--accent-ink);
    padding: 2px 6px; border-radius: var(--radius);
    font-family: var(--mono); font-size: 14px;
    border: 1px solid var(--line);
  }
  .task-card .footer {
    margin-top: 18px; padding-top: 14px;
    border-top: 1px dashed var(--line);
    display: flex; gap: 8px; align-items: center;
    font-family: var(--mono); font-size: 13px;
    color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em;
  }

  /* ── Topics list ─────────────────────────────────────────────────── */
  .topics {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 0;
    border-top: 1px solid var(--line);
  }
  .topic {
    padding: 16px 18px;
    border-bottom: 1px solid var(--line);
    display: grid; grid-template-columns: 60px 1fr 100px;
    gap: 14px; align-items: center;
    font-size: 15px;
  }
  .topic:nth-child(odd) { border-right: 1px solid var(--line); }
  .topic .id {
    font-family: var(--mono); font-size: 12px;
    color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em;
  }
  .topic .name { font-weight: 500; color: var(--ink); }
  .topic .name .sub {
    display: block; font-weight: 400; color: var(--muted);
    font-size: 14px; margin-top: 2px;
  }
  .topic .weight {
    font-family: var(--mono); font-size: 13px;
    color: var(--ink-3); text-align: right;
    font-feature-settings: 'tnum';
  }
  .topic .weight .bar {
    display: block; margin-top: 4px; height: 3px;
    background: var(--surface-3); border-radius: 2px;
    overflow: hidden;
  }
  .topic .weight .bar i {
    display: block; height: 100%; background: var(--ink);
  }

  /* ── Quote / proof ───────────────────────────────────────────────── */
  .quote {
    background: var(--ink); color: #d8d6cf;
    border-radius: var(--radius);
    padding: 48px 44px;
    margin-top: 36px;
    display: grid; grid-template-columns: 2fr 1fr; gap: 48px;
    align-items: center;
  }
  .quote .q {
    font-family: var(--sans);
    font-size: clamp(20px, 2.4vw, 28px);
    line-height: 1.35; letter-spacing: -0.01em;
    font-weight: 500; color: #f4f1e6;
    text-wrap: pretty;
  }
  .quote .q::before {
    content: '“'; color: var(--accent);
    font-size: 1.5em; line-height: 0;
    margin-right: 4px; vertical-align: -0.2em;
  }
  .quote .attrib {
    font-family: var(--mono); font-size: 13px;
    color: oklch(0.65 0.02 248); text-transform: uppercase; letter-spacing: 0.08em;
    line-height: 1.7;
  }
  .quote .attrib strong {
    display: block; color: #f4f1e6; font-weight: 600;
    text-transform: none; letter-spacing: -0.005em;
    font-size: 16px; font-family: var(--sans);
    margin-bottom: 4px;
  }
  .quote-stats {
    display: flex; gap: 28px; flex-direction: column;
    font-family: var(--mono);
  }
  .quote-stats .row {
    display: flex; justify-content: space-between; align-items: baseline;
    border-top: 1px solid oklch(0.30 0.01 248);
    padding-top: 10px;
  }
  .quote-stats .row .v {
    font-size: 29px; font-weight: 500; color: #f4f1e6;
    letter-spacing: -0.01em; font-feature-settings: 'tnum';
  }
  .quote-stats .row .k {
    font-size: 12px; color: oklch(0.65 0.02 248);
    text-transform: uppercase; letter-spacing: 0.1em;
  }

  /* ── FAQ ─────────────────────────────────────────────────────────── */
  .faq { margin-top: 36px; border-top: 1px solid var(--line); }
  .faq details {
    border-bottom: 1px solid var(--line);
    padding: 18px 4px;
  }
  .faq summary {
    cursor: pointer; list-style: none;
    display: flex; justify-content: space-between; align-items: center;
    font-weight: 500; font-size: 18px; color: var(--ink);
    letter-spacing: -0.005em;
  }
  .faq summary::-webkit-details-marker { display: none; }
  .faq summary::after {
    content: '+'; font-family: var(--mono); font-size: 21px;
    color: var(--muted); transition: transform .15s;
  }
  .faq details[open] summary::after { transform: rotate(45deg); color: var(--ink); }
  .faq .a {
    font-size: 16px; color: var(--ink-3); line-height: 1.65;
    margin: 12px 0 0; max-width: 720px;
  }

  /* ── Final CTA ───────────────────────────────────────────────────── */
  .cta-block {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 56px 44px;
    margin-top: 36px;
    display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px;
    align-items: center;
    position: relative;
    overflow: hidden;
  }
  .cta-block::before {
    content: ''; position: absolute; top: 0; left: 0; bottom: 0;
    width: 4px; background: var(--ink);
  }
  .cta-block h3 {
    font-size: 34px; font-weight: 600;
    letter-spacing: -0.02em; margin: 0 0 10px;
    line-height: 1.15;
  }
  .cta-block p {
    color: var(--ink-3); margin: 0 0 22px; font-size: 17px;
    line-height: 1.6; max-width: 480px;
  }
  .cta-checks {
    font-family: var(--mono); font-size: 14px; color: var(--ink-2);
    line-height: 2;
  }
  .cta-checks li {
    list-style: none; padding-left: 22px; position: relative;
  }
  .cta-checks li::before {
    content: '✓'; position: absolute; left: 0;
    color: var(--ok); font-weight: 600;
  }

  /* ── Footer ──────────────────────────────────────────────────────── */
  footer.foot {
    border-top: 1px solid var(--line);
    padding: 36px 32px;
    margin-top: 0;
  }
  .foot-inner {
    max-width: 1180px; margin: 0 auto;
    display: flex; justify-content: space-between; align-items: center;
    font-family: var(--mono); font-size: 13px;
    color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em;
  }
  .foot-inner .links { display: flex; gap: 18px; }
  .foot-inner a { color: var(--ink-3); }

  /* ── Cert switcher (in nav) ──────────────────────────────────────── */
  .cert-switch {
    display: inline-flex; align-items: center; gap: 0;
    border: 1px solid var(--line-2); border-radius: var(--radius);
    overflow: hidden; margin-right: 6px;
    flex: none;
  }
  .cert-switch a {
    font-family: var(--mono); font-size: 12px; font-weight: 500;
    text-transform: uppercase; letter-spacing: 0.08em;
    color: var(--ink-3); padding: 7px 12px; text-decoration: none;
    border-right: 1px solid var(--line);
    flex: none; white-space: nowrap;
  }
  .cert-switch a:last-child { border-right: 0; }
  .cert-switch a:hover { background: var(--surface-3); text-decoration: none; }
  .cert-switch a.active { background: var(--ink); color: #fff; }

  /* ── Cert cards (hub) ────────────────────────────────────────────── */
  .cert-cards {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 0;
    margin-top: 40px;
    border-top: 1px solid var(--line);
    border-left: 1px solid var(--line);
  }
  .cert-card {
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 28px 26px;
    background: var(--surface);
    display: flex; flex-direction: column;
    text-decoration: none; color: inherit;
    position: relative; transition: background .12s;
  }
  .cert-card:hover { background: var(--surface-3); text-decoration: none; }
  .cert-card .code {
    font-family: var(--mono); font-size: 13px; font-weight: 600;
    letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--accent-ink);
  }
  .cert-card .full {
    font-size: 13px; color: var(--muted); margin-top: 2px;
  }
  .cert-card h3 {
    font-size: 21px; font-weight: 600; margin: 16px 0 8px;
    letter-spacing: -0.01em;
  }
  .cert-card p {
    font-size: 15px; color: var(--ink-3); line-height: 1.6; margin: 0 0 18px;
    flex: 1;
  }
  .cert-card .stats {
    display: flex; gap: 16px; flex-wrap: wrap;
    border-top: 1px dashed var(--line); padding-top: 14px;
    font-family: var(--mono); font-size: 12px;
    color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em;
  }
  .cert-card .stats b {
    display: block; font-size: 18px; color: var(--ink);
    letter-spacing: -0.01em; font-weight: 600; font-feature-settings: 'tnum';
  }
  .cert-card .go {
    margin-top: 18px;
    font-family: var(--mono); font-size: 13px; font-weight: 500;
    color: var(--ink); text-transform: uppercase; letter-spacing: 0.08em;
  }
  .cert-card .go::after { content: ' →'; }

  /* ── Cross-cert strip (per-cert pages) ───────────────────────────── */
  .cert-cross {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px;
    margin-top: 36px;
  }
  .cert-cross a {
    border: 1px solid var(--line); border-radius: var(--radius);
    padding: 20px 22px; background: var(--surface);
    text-decoration: none; color: inherit; transition: background .12s;
  }
  .cert-cross a:hover { background: var(--surface-3); text-decoration: none; }
  .cert-cross .code {
    font-family: var(--mono); font-size: 12px; font-weight: 600;
    letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent-ink);
  }
  .cert-cross h4 { font-size: 17px; font-weight: 600; margin: 6px 0 4px; }
  .cert-cross p { font-size: 14px; color: var(--ink-3); line-height: 1.55; margin: 0; }

  /* ── Responsive ──────────────────────────────────────────────────── */
  @media (max-width: 920px) {
    .hero-grid, .preview-grid, .quote, .cta-block { grid-template-columns: 1fr; gap: 28px; }
    .feat-grid { grid-template-columns: 1fr; }
    .steps-row { grid-template-columns: repeat(2, 1fr); }
    .topics { grid-template-columns: 1fr; }
    .topic:nth-child(odd) { border-right: 0; }
    .cert-cards { grid-template-columns: 1fr; }
    .cert-cross { grid-template-columns: 1fr; }
    .nav .links { gap: 0; }
    .nav .cert-switch { display: none; }
    .section { padding: 60px 0; }
  }