:root {
      --bg: #071017;
      --bg-soft: #0c1822;
      --surface: rgba(12, 25, 36, 0.84);
      --surface-strong: rgba(14, 30, 43, 0.96);
      --line: rgba(127, 168, 196, 0.18);
      --line-strong: rgba(155, 216, 207, 0.34);
      --text: #edf4f7;
      --muted: #9cb1bf;
      --soft: #6f8796;
      --signal: #8ce4d4;
      --signal-strong: #bafbf1;
      --cobalt: #78b4ff;
      --danger: #f2b395;
      --shadow: 0 28px 70px rgba(0, 0, 0, 0.34);
      --radius-xl: 30px;
      --radius-lg: 22px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --max: 1200px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: "IBM Plex Sans", sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at top left, rgba(120, 180, 255, 0.14), transparent 28%),
        radial-gradient(circle at 82% 14%, rgba(140, 228, 212, 0.10), transparent 24%),
        linear-gradient(180deg, #050a10 0%, #071017 50%, #09131b 100%);
      min-height: 100vh;
    }

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

    .shell {
      width: min(calc(100% - 40px), var(--max));
      margin: 0 auto;
    }

    .topbar {
      position: sticky;
      top: 0;
      z-index: 20;
      backdrop-filter: blur(14px);
      background: rgba(7, 16, 23, 0.76);
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }

    .topbar-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      padding: 18px 0;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 14px;
      font-weight: 600;
      letter-spacing: 0.02em;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      border: 1px solid rgba(186, 251, 241, 0.22);
      background:
        radial-gradient(circle at 30% 30%, rgba(186, 251, 241, 0.32), transparent 42%),
        linear-gradient(145deg, rgba(120, 180, 255, 0.22), rgba(14, 30, 43, 0.96));
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
      position: relative;
    }

    .brand-mark::before,
    .brand-mark::after {
      content: "";
      position: absolute;
      border-radius: 999px;
      background: linear-gradient(90deg, rgba(186, 251, 241, 0.9), rgba(120, 180, 255, 0.7));
    }

    .brand-mark::before {
      width: 18px;
      height: 2px;
      top: 13px;
      left: 11px;
    }

    .brand-mark::after {
      width: 10px;
      height: 2px;
      top: 25px;
      left: 17px;
    }

    .brand-copy strong {
      display: block;
      font-size: 0.98rem;
    }

    .brand-copy span {
      display: block;
      color: var(--soft);
      font-size: 0.78rem;
      margin-top: 2px;
    }

    nav {
      display: flex;
      align-items: center;
      gap: 22px;
      color: var(--muted);
      font-size: 0.95rem;
    }

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

    .nav-cta {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 11px 16px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      color: var(--text);
      font-weight: 500;
    }

    .hero {
      padding: 72px 0 54px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
      gap: 34px;
      align-items: stretch;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 10px 14px;
      border-radius: 999px;
      border: 1px solid rgba(186, 251, 241, 0.18);
      background: rgba(186, 251, 241, 0.06);
      color: var(--signal-strong);
      font-size: 0.86rem;
      letter-spacing: 0.02em;
      margin-bottom: 22px;
    }

    .eyebrow::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--signal);
      box-shadow: 0 0 18px rgba(140, 228, 212, 0.85);
    }

    h1 {
      margin: 0;
      font-family: "Newsreader", serif;
      font-size: clamp(3rem, 6vw, 5.5rem);
      line-height: 0.96;
      letter-spacing: -0.04em;
      max-width: 10ch;
    }

    .hero p.lead {
      margin: 24px 0 0;
      color: var(--muted);
      font-size: 1.14rem;
      line-height: 1.75;
      max-width: 56ch;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 34px;
    }

    .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      min-height: 52px;
      padding: 0 22px;
      border-radius: 999px;
      font-weight: 600;
      letter-spacing: 0.01em;
      transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
    }

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

    .button-primary {
      color: #031015;
      background: linear-gradient(135deg, var(--signal-strong), #92bfff);
      box-shadow: 0 14px 38px rgba(120, 180, 255, 0.2);
    }

    .button-secondary {
      color: var(--text);
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
    }

    .hero-meta {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 14px;
      margin-top: 34px;
    }

    .hero-meta .tile {
      padding: 16px 18px;
      border-radius: var(--radius-md);
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.03);
      min-height: 116px;
    }

    .tile-label {
      color: var(--soft);
      font-size: 0.8rem;
      text-transform: uppercase;
      letter-spacing: 0.12em;
      margin-bottom: 14px;
    }

    .tile strong {
      display: block;
      font-size: 1.15rem;
      line-height: 1.4;
      margin-bottom: 10px;
    }

    .tile span {
      color: var(--muted);
      font-size: 0.92rem;
      line-height: 1.55;
    }

    .hero-visual {
      position: relative;
      min-height: 100%;
      border-radius: var(--radius-xl);
      border: 1px solid rgba(255, 255, 255, 0.08);
      background:
        linear-gradient(180deg, rgba(15, 30, 43, 0.95), rgba(8, 18, 28, 0.9)),
        radial-gradient(circle at top right, rgba(120, 180, 255, 0.16), transparent 34%);
      box-shadow: var(--shadow);
      padding: 26px;
      overflow: hidden;
    }

    .hero-visual::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(180deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
      background-size: 44px 44px;
      opacity: 0.14;
      pointer-events: none;
    }

    .visual-topline {
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--soft);
      font-size: 0.8rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      margin-bottom: 18px;
    }

    .visual-grid {
      display: grid;
      grid-template-columns: 1fr 0.86fr;
      gap: 20px;
      position: relative;
      z-index: 1;
    }

    .phone-shell {
      position: relative;
      border-radius: 28px;
      padding: 14px;
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
      border: 1px solid rgba(255, 255, 255, 0.08);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
      min-height: 520px;
    }

    .phone-screen {
      height: 100%;
      border-radius: 22px;
      padding: 18px;
      background:
        radial-gradient(circle at top center, rgba(140, 228, 212, 0.14), transparent 32%),
        linear-gradient(180deg, rgba(6, 13, 19, 0.96), rgba(10, 20, 28, 0.96));
      border: 1px solid rgba(255, 255, 255, 0.06);
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .screen-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
    }

    .screen-head strong {
      font-size: 1rem;
    }

    .screen-head span {
      color: var(--soft);
      font-size: 0.84rem;
    }

    .status-pulse {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 10px;
      border-radius: 999px;
      background: rgba(140, 228, 212, 0.08);
      color: var(--signal-strong);
      font-size: 0.78rem;
    }

    .status-pulse::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--signal);
      box-shadow: 0 0 12px rgba(140, 228, 212, 0.7);
    }

    .metric-strip {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 12px;
    }

    .metric-card {
      padding: 14px;
      border-radius: 16px;
      border: 1px solid rgba(255, 255, 255, 0.07);
      background: rgba(255, 255, 255, 0.03);
    }

    .metric-card b {
      display: block;
      font-size: 1.1rem;
      margin-bottom: 5px;
    }

    .metric-card small {
      color: var(--soft);
      font-size: 0.76rem;
      text-transform: uppercase;
      letter-spacing: 0.08em;
    }

    .service-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
      margin-top: auto;
    }

    .service-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      padding: 14px 15px;
      border-radius: 16px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.06);
    }

    .service-item strong {
      display: block;
      margin-bottom: 3px;
      font-size: 0.96rem;
    }

    .service-item span {
      color: var(--soft);
      font-size: 0.82rem;
    }

    .state {
      padding: 7px 10px;
      border-radius: 999px;
      font-size: 0.78rem;
      font-weight: 600;
      color: #021216;
    }

    .state-ok {
      background: linear-gradient(135deg, rgba(140, 228, 212, 0.95), rgba(186, 251, 241, 0.82));
    }

    .state-warn {
      background: linear-gradient(135deg, rgba(242, 179, 149, 0.94), rgba(255, 220, 184, 0.84));
    }

    .stack {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .panel {
      padding: 18px;
      border-radius: 20px;
      border: 1px solid rgba(255, 255, 255, 0.08);
      background: rgba(255, 255, 255, 0.03);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
    }

    .panel strong {
      display: block;
      margin-bottom: 10px;
      font-size: 0.95rem;
    }

    .terminal {
      font-family: "IBM Plex Mono", monospace;
      font-size: 0.82rem;
      color: #d6f1fb;
      line-height: 1.8;
      white-space: pre-wrap;
      background: rgba(2, 8, 12, 0.68);
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: 16px;
      padding: 14px;
      overflow: hidden;
      overflow-wrap: anywhere;
      word-break: break-word;
    }

    .terminal .prompt {
      color: var(--signal);
    }

    .entitlement-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
      margin: 0;
      padding: 0;
      list-style: none;
      color: var(--muted);
      line-height: 1.55;
    }

    .entitlement-list li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      min-width: 0;
    }

    .entitlement-list code {
      overflow-wrap: anywhere;
      word-break: break-word;
    }

    .entitlement-list li::before {
      content: "";
      width: 7px;
      height: 7px;
      margin-top: 9px;
      border-radius: 50%;
      background: var(--cobalt);
      flex: 0 0 auto;
    }

    section {
      padding: 28px 0;
    }

    section[id] {
      scroll-margin-top: 88px;
    }

    .section-head {
      display: flex;
      justify-content: space-between;
      gap: 22px;
      align-items: flex-end;
      margin-bottom: 26px;
    }

    .section-head h2 {
      margin: 0;
      font-family: "Newsreader", serif;
      font-size: clamp(2rem, 3vw, 3rem);
      line-height: 1.03;
      letter-spacing: -0.03em;
    }

    .section-head p {
      margin: 0;
      max-width: 50ch;
      color: var(--muted);
      line-height: 1.7;
    }

    .signal-band {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 16px;
      margin-top: 4px;
    }

    .signal-card {
      padding: 18px;
      border-radius: var(--radius-md);
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.03);
    }

    .signal-card strong {
      display: block;
      font-size: 0.85rem;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      color: var(--soft);
      margin-bottom: 10px;
    }

    .signal-card b {
      display: block;
      font-size: 1.3rem;
      margin-bottom: 10px;
    }

    .signal-card span {
      color: var(--muted);
      line-height: 1.55;
      font-size: 0.92rem;
    }

    .proof-band {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 16px;
      margin-top: 4px;
    }

    .architecture {
      display: grid;
      grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
      gap: 22px;
    }

    .diagram,
    .doctrine {
      padding: 26px;
      border-radius: var(--radius-xl);
      border: 1px solid var(--line);
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.02));
      box-shadow: var(--shadow);
    }

    .diagram-flow {
      display: grid;
      gap: 18px;
      margin-top: 18px;
    }

    .flow-node {
      position: relative;
      padding: 18px 18px 18px 22px;
      border-radius: 20px;
      border: 1px solid rgba(255, 255, 255, 0.08);
      background: rgba(5, 12, 18, 0.58);
    }

    .flow-node:not(:last-child)::after {
      content: "";
      position: absolute;
      left: 30px;
      bottom: -18px;
      width: 1px;
      height: 18px;
      background: linear-gradient(180deg, rgba(186, 251, 241, 0.4), transparent);
    }

    .flow-node strong {
      display: block;
      margin-bottom: 8px;
      font-size: 1rem;
    }

    .flow-node span {
      display: block;
      color: var(--muted);
      line-height: 1.65;
      font-size: 0.94rem;
    }

    .flow-node em {
      display: inline-block;
      margin-top: 12px;
      color: var(--signal-strong);
      font-style: normal;
      font-size: 0.82rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .doctrine-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
      margin-top: 18px;
    }

    .doctrine-card {
      padding: 18px;
      border-radius: 18px;
      border: 1px solid rgba(255, 255, 255, 0.07);
      background: rgba(255, 255, 255, 0.03);
    }

    .doctrine-card strong {
      display: block;
      margin-bottom: 8px;
      font-size: 0.95rem;
    }

    .doctrine-card p {
      margin: 0;
      color: var(--muted);
      line-height: 1.65;
      font-size: 0.92rem;
    }

    .recipe-grid,
    .feature-grid,
    .plan-grid {
      display: grid;
      gap: 16px;
    }

    .recipe-grid {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .recipe {
      padding: 22px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.03);
      min-height: 270px;
      display: flex;
      flex-direction: column;
    }

    .recipe-index {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 34px;
      height: 34px;
      border-radius: 50%;
      border: 1px solid rgba(186, 251, 241, 0.22);
      color: var(--signal-strong);
      font-weight: 600;
      margin-bottom: 18px;
    }

    .recipe h3 {
      margin: 0 0 12px;
      font-size: 1.08rem;
    }

    .recipe p {
      margin: 0 0 18px;
      color: var(--muted);
      line-height: 1.68;
      flex: 1;
    }

    .micro-code {
      margin-top: auto;
      padding: 12px 14px;
      border-radius: 14px;
      background: rgba(3, 10, 15, 0.72);
      border: 1px solid rgba(255, 255, 255, 0.06);
      font-family: "IBM Plex Mono", monospace;
      font-size: 0.77rem;
      color: #d7f6ee;
      overflow-wrap: anywhere;
    }

    .feature-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .feature {
      padding: 24px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.03);
    }

    .feature strong {
      display: block;
      margin-bottom: 8px;
      font-size: 1rem;
    }

    .feature p {
      margin: 0;
      color: var(--muted);
      line-height: 1.7;
    }

    .quote-card {
      padding: 32px;
      border-radius: var(--radius-xl);
      border: 1px solid rgba(186, 251, 241, 0.14);
      background:
        linear-gradient(180deg, rgba(186, 251, 241, 0.05), rgba(255, 255, 255, 0.02)),
        rgba(10, 19, 27, 0.88);
      box-shadow: var(--shadow);
    }

    .quote-card blockquote {
      margin: 0;
      font-family: "Newsreader", serif;
      font-size: clamp(1.8rem, 2.8vw, 2.8rem);
      line-height: 1.18;
      letter-spacing: -0.03em;
    }

    .quote-card p {
      margin: 18px 0 0;
      color: var(--muted);
      max-width: 58ch;
      line-height: 1.75;
    }

    .offer-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 16px;
    }

    .offer {
      padding: 26px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.03);
      display: flex;
      flex-direction: column;
      min-height: 410px;
    }

    .offer.featured {
      border-color: rgba(186, 251, 241, 0.28);
      background:
        linear-gradient(180deg, rgba(186, 251, 241, 0.06), rgba(120, 180, 255, 0.05)),
        rgba(255, 255, 255, 0.03);
    }

    .offer-tag {
      color: var(--signal-strong);
      font-size: 0.76rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      margin-bottom: 16px;
    }

    .offer h3 {
      margin: 0 0 10px;
      font-size: 1.18rem;
    }

    .offer-price {
      margin: 0 0 16px;
      font-family: "Newsreader", serif;
      font-size: 2.35rem;
      line-height: 1;
    }

    .offer-price span {
      color: var(--soft);
      font-size: 0.92rem;
      font-family: "IBM Plex Sans", sans-serif;
    }

    .offer p {
      margin: 0 0 20px;
      color: var(--muted);
      line-height: 1.68;
    }

    .offer ul {
      list-style: none;
      padding: 0;
      margin: 0 0 24px;
      display: grid;
      gap: 10px;
      color: var(--muted);
      line-height: 1.55;
      font-size: 0.92rem;
    }

    .offer li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
    }

    .offer li::before {
      content: "";
      width: 7px;
      height: 7px;
      margin-top: 8px;
      border-radius: 50%;
      background: var(--cobalt);
      flex: 0 0 auto;
    }

    .offer-sublabel {
      font-size: 0.78rem;
      font-weight: 600;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--cobalt);
      margin: 16px 0 6px !important;
    }

    .offer-scope {
      font-size: 0.78rem;
      color: var(--muted);
      opacity: 0.65;
      line-height: 1.5;
      margin: 0 0 20px !important;
      font-style: italic;
    }

    .offer-guarantee {
      font-size: 0.84rem;
      color: var(--muted);
      line-height: 1.6;
      border-top: 1px solid rgba(255,255,255,0.07);
      padding-top: 16px;
      margin: 0 0 20px !important;
      font-style: italic;
    }

    .offer .button {
      width: 100%;
      margin-top: auto;
    }

    .plan-grid {
      grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .plan {
      position: relative;
      padding: 24px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.03);
      display: flex;
      flex-direction: column;
      min-height: 320px;
    }

    .plan.highlight {
      border-color: rgba(186, 251, 241, 0.28);
      background:
        linear-gradient(180deg, rgba(186, 251, 241, 0.06), rgba(120, 180, 255, 0.05)),
        rgba(255, 255, 255, 0.03);
    }

    .plan-badge {
      position: absolute;
      top: 16px;
      right: 16px;
      padding: 7px 10px;
      border-radius: 999px;
      background: rgba(186, 251, 241, 0.12);
      color: var(--signal-strong);
      font-size: 0.72rem;
      text-transform: uppercase;
      letter-spacing: 0.09em;
    }

    .plan h3 {
      margin: 0 0 8px;
      font-size: 1rem;
    }

    .plan .price {
      margin: 0 0 14px;
      font-family: "Newsreader", serif;
      font-size: 2.5rem;
      letter-spacing: -0.04em;
    }

    .plan .price span {
      color: var(--soft);
      font-size: 0.9rem;
      font-family: "IBM Plex Sans", sans-serif;
      letter-spacing: normal;
    }

    .plan p {
      margin: 0 0 16px;
      color: var(--muted);
      line-height: 1.65;
    }

    .plan ul {
      list-style: none;
      padding: 0;
      margin: 0;
      display: grid;
      gap: 10px;
      color: var(--muted);
      line-height: 1.55;
      font-size: 0.92rem;
    }

    .plan li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
    }

    .plan li::before {
      content: "";
      width: 7px;
      height: 7px;
      margin-top: 8px;
      border-radius: 50%;
      background: var(--signal);
      flex: 0 0 auto;
    }

    .footer {
      padding: 18px 0 62px;
    }

    .footer-card {
      display: flex;
      justify-content: space-between;
      gap: 24px;
      padding: 26px;
      border-radius: var(--radius-xl);
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.03);
    }

    .footer-copy strong {
      display: block;
      margin-bottom: 8px;
      font-size: 1rem;
    }

    .footer-copy p {
      margin: 0;
      max-width: 60ch;
      color: var(--muted);
      line-height: 1.7;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      gap: 16px 18px;
      align-content: flex-start;
      color: var(--muted);
    }

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

    @media (max-width: 1120px) {
      .hero-grid,
      .architecture,
      .recipe-grid,
      .offer-grid,
      .plan-grid {
        grid-template-columns: 1fr;
      }

      .feature-grid,
      .signal-band,
      .proof-band,
      .doctrine-grid,
      .hero-meta {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

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

      .phone-shell {
        min-height: 440px;
      }
    }

    @media (max-width: 780px) {
      .shell {
        width: min(calc(100% - 24px), var(--max));
      }

      .topbar-inner,
      .section-head,
      .footer-card {
        flex-direction: column;
        align-items: flex-start;
      }

      nav {
        flex-wrap: wrap;
        gap: 14px;
      }

      h1 {
        max-width: none;
      }

      .feature-grid,
      .signal-band,
      .proof-band,
      .doctrine-grid,
      .hero-meta,
      .metric-strip {
        grid-template-columns: 1fr;
      }

      .hero {
        padding-top: 42px;
      }

      .quote-card blockquote {
        font-size: 2rem;
      }

      section[id] {
        scroll-margin-top: 236px;
      }

      .preflight-inner {
        grid-template-columns: 1fr;
      }
    }

    /* ── Preflight section ──────────────────────────────────────────────────── */

    .preflight-section {
      padding: 80px 0 64px;
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }

    .preflight-inner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: start;
    }

    .preflight-copy h2 {
      font-size: 2.4rem;
      line-height: 1.18;
      margin: 12px 0 20px;
    }

    .preflight-copy p {
      color: var(--muted);
      line-height: 1.7;
      margin: 0 0 24px;
    }

    .preflight-checks {
      display: flex;
      flex-direction: column;
      gap: 8px;
      margin-bottom: 24px;
    }

    .preflight-checks span {
      font-size: 0.95rem;
      color: var(--signal);
    }

    .preflight-note {
      font-size: 0.88rem;
      color: var(--soft);
      font-style: italic;
      margin: 0;
    }

    .terminal-label {
      font-size: 0.78rem;
      color: var(--soft);
      letter-spacing: 0.06em;
      text-transform: uppercase;
      margin-bottom: 10px;
    }

    .preflight-terminal {
      font-size: 0.82rem;
      line-height: 1.75;
      white-space: pre-wrap;
      overflow-x: auto;
      border: 1px solid var(--line-strong);
      background: rgba(0, 0, 0, 0.32);
    }

    /* Re-affirmed below the unconditional .preflight-inner rule above so the
       narrow-viewport collapse actually wins the cascade (equal specificity,
       later source order). Without this, #install/#preflight stayed two
       columns on mobile regardless of the @media block earlier in the file. */
    @media (max-width: 780px) {
      .preflight-inner {
        grid-template-columns: 1fr;
      }
    }