:root {
  --canvas: #f7f8f5;
  --paper: #ffffff;
  --paper-soft: #f0f4ef;
  --ink: #182026;
  --muted: #68727d;
  --line: #d8dfd7;
  --line-strong: #26343b;
  --green: #116c5a;
  --green-dark: #07483c;
  --rust: #a94d2a;
  --amber: #e7b84f;
  --blueprint: #172235;
  --code: #101916;
  --code-text: #e7f1ea;
  --shadow-hard: 5px 5px 0 rgba(24, 32, 38, .95);
  --shadow-soft: 0 20px 60px rgba(24, 32, 38, .09);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(90deg, rgba(17, 108, 90, .04) 1px, transparent 1px),
    linear-gradient(rgba(17, 108, 90, .04) 1px, transparent 1px),
    var(--canvas);
  background-size: 42px 42px, 42px 42px, auto;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", "Noto Serif SC", "Source Han Serif SC", serif;
  line-height: 1.72;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(115deg, rgba(17, 108, 90, .08), transparent 42%, rgba(169, 77, 42, .08));
  mix-blend-mode: multiply;
}

a {
  color: inherit;
}

.site-header,
main,
.site-footer {
  width: min(1160px, calc(100% - 36px));
  margin-inline: auto;
}

.site-header {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 22px 0 16px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: grid;
  gap: 3px;
  text-decoration: none;
}

.brand-kicker,
.section-label,
.meta-line,
.top-nav,
.button,
.text-link,
.quick-verdict span,
.toc,
.side-box span,
.step-no,
.site-footer {
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0;
}

.brand-kicker {
  color: var(--rust);
  font-size: 12px;
  font-weight: 800;
}

.brand-title {
  font-size: 19px;
  font-weight: 900;
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
}

.top-nav a {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border: 1px solid transparent;
  text-decoration: none;
}

.top-nav a:hover {
  border-color: var(--line);
  background: var(--paper);
}

main {
  position: relative;
  z-index: 1;
}

.hero-shell {
  padding: 40px 0 28px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  align-items: stretch;
  gap: 28px;
}

.hero-main {
  min-height: 400px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(26px, 5vw, 54px);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .92);
  box-shadow: var(--shadow-soft);
}

.section-label {
  margin: 0 0 14px;
  color: var(--rust);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 850px;
  margin-bottom: 24px;
  font-size: clamp(36px, 5.2vw, 60px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-lede,
.article-summary {
  max-width: 760px;
  color: #3e4751;
  font-size: clamp(16px, 1.8vw, 19px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 17px;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink);
  font-weight: 850;
  text-decoration: none;
}

.button.is-primary {
  background: var(--green);
  color: white;
  box-shadow: 4px 4px 0 var(--line-strong);
}

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

.terminal-card {
  display: flex;
  flex-direction: column;
  border: 1px solid #203049;
  background: var(--blueprint);
  color: #eef4e9;
  box-shadow: var(--shadow-soft);
}

.terminal-top {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 42px;
  padding: 0 14px;
  border-bottom: 1px solid rgba(255, 255, 255, .2);
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

.terminal-top span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--amber);
}

.terminal-top span:nth-child(2) {
  background: #e77d4f;
}

.terminal-top span:nth-child(3) {
  background: #75d0b4;
}

.terminal-top strong {
  margin-left: auto;
  color: #b9c8c0;
  font-size: 12px;
}

.terminal-card pre {
  flex: 1;
  display: flex;
  align-items: center;
  margin: 0;
  padding: 24px;
  background: transparent;
  border: 0;
}

pre {
  overflow-x: auto;
  margin: 18px 0 22px;
  padding: 18px 20px;
  border: 1px solid #263a32;
  background: var(--code);
  color: var(--code-text);
  font-size: 14px;
  line-height: 1.65;
}

code {
  font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 18px 0 48px;
  border: 1px solid var(--line);
  background: var(--paper);
}

.metric-strip div {
  min-height: 140px;
  padding: 22px;
  border-right: 1px solid var(--line);
}

.metric-strip div:last-child {
  border-right: 0;
}

.metric-strip span {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--rust);
  font-weight: 900;
}

.metric-strip strong {
  display: block;
  margin-bottom: 8px;
  font-size: 20px;
}

.metric-strip p,
.lead-note p,
.roadmap p,
.principles li {
  color: var(--muted);
}

.section-block {
  padding: 30px 0 54px;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.08;
  letter-spacing: 0;
}

.lead-note {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  padding: 26px;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow-soft);
}

.lead-note + .lead-note {
  margin-top: 14px;
}

.secondary-note {
  box-shadow: none;
}

.note-index {
  width: 70px;
  height: 70px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  background: var(--amber);
  font-size: 24px;
  font-weight: 900;
}

.meta-line {
  margin-bottom: 7px;
  color: var(--rust);
  font-size: 13px;
  font-weight: 800;
}

.lead-note h3 {
  margin-bottom: 9px;
  font-size: clamp(25px, 3vw, 38px);
  line-height: 1.12;
}

.lead-note h3 a {
  text-decoration-thickness: 3px;
  text-decoration-color: rgba(13, 107, 87, .35);
  text-underline-offset: 5px;
}

.text-link {
  color: var(--green-dark);
  font-weight: 900;
  text-decoration: none;
  white-space: nowrap;
}

.roadmap {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.roadmap article {
  min-height: 250px;
  padding: 22px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .9);
}

.roadmap span {
  display: inline-block;
  margin-bottom: 26px;
  padding: 3px 8px;
  border: 1px solid var(--line);
  background: var(--paper-soft);
  font-size: 13px;
  font-weight: 900;
}

.roadmap h3 {
  margin-bottom: 12px;
  font-size: 24px;
  line-height: 1.18;
}

.principles {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(0, 1fr);
  gap: 34px;
  margin: 10px 0 64px;
  padding: 32px;
  border: 1px solid var(--green-dark);
  background: var(--green-dark);
  color: white;
}

.principles .section-label {
  color: var(--amber);
}

.principles ul {
  margin: 0;
  padding-left: 22px;
}

.principles li {
  margin-bottom: 10px;
  color: #d7ebe4;
}

.site-footer {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 0 42px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.article-page {
  padding-bottom: 64px;
}

.article-hero {
  padding: 36px 0 24px;
}

.article-hero h1 {
  max-width: 980px;
  font-size: clamp(34px, 4.6vw, 56px);
  line-height: 1.08;
}

.quick-verdict {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 24px;
  border: 1px solid var(--line);
  background: var(--paper);
}

.quick-verdict div {
  padding: 18px;
  border-right: 1px solid var(--line);
}

.quick-verdict div:last-child {
  border-right: 0;
}

.quick-verdict span {
  display: block;
  margin-bottom: 8px;
  color: var(--rust);
  font-size: 12px;
  font-weight: 900;
}

.quick-verdict strong {
  display: block;
  font-size: 18px;
  line-height: 1.35;
}

.article-grid {
  display: grid;
  grid-template-columns: 180px minmax(0, 740px) 220px;
  align-items: start;
  gap: 22px;
}

.toc,
.side-notes {
  position: sticky;
  top: 18px;
}

.toc {
  display: grid;
  gap: 8px;
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .88);
  font-size: 14px;
}

.toc strong {
  margin-bottom: 6px;
  color: var(--rust);
}

.toc a {
  color: #3d4752;
  text-decoration: none;
}

.toc a:hover {
  color: var(--green-dark);
}

.article-body {
  display: grid;
  gap: 18px;
}

.manual-card,
.step {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .96);
  box-shadow: var(--shadow-soft);
}

.manual-card {
  padding: clamp(22px, 4vw, 34px);
}

.manual-card h2,
.step h2 {
  font-size: clamp(27px, 3vw, 36px);
}

.state-table {
  display: grid;
  border: 1px solid var(--line);
}

.state-table div {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  border-bottom: 1px solid var(--line);
}

.state-table div:last-child {
  border-bottom: 0;
}

.state-table span,
.state-table strong {
  padding: 12px 14px;
}

.state-table span {
  border-right: 1px solid var(--line);
  color: var(--muted);
}

.state-table strong {
  color: var(--green-dark);
}

.step {
  position: relative;
  padding: clamp(22px, 4vw, 34px);
}

.step-no {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  background: var(--amber);
  font-weight: 950;
}

.warning-box {
  margin-top: 20px;
  padding: 18px;
  border-left: 6px solid var(--rust);
  background: #fff0df;
}

.warning-box strong {
  display: block;
  margin-bottom: 6px;
}

.check-list {
  display: grid;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  padding: 10px 12px;
  border: 1px solid var(--line);
  background: #fffdf8;
}

.side-notes {
  display: grid;
  gap: 14px;
}

.side-box {
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .88);
}

.side-box span {
  display: block;
  margin-bottom: 8px;
  color: var(--rust);
  font-size: 12px;
  font-weight: 900;
}

.side-box p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

@media (max-width: 1020px) {
  .hero-grid,
  .article-grid {
    grid-template-columns: 1fr;
  }

  .hero-main {
    min-height: auto;
  }

  .toc,
  .side-notes {
    position: static;
  }

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

  .toc strong {
    grid-column: 1 / -1;
  }

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

@media (max-width: 760px) {
  .site-header,
  .site-footer,
  .section-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-header,
  main,
  .site-footer {
    width: min(100% - 26px, 1160px);
  }

  .top-nav {
    width: 100%;
    justify-content: space-between;
  }

  .hero-shell {
    padding-top: 34px;
  }

  .hero-main {
    padding: 24px;
    box-shadow: 5px 5px 0 #171a1f;
  }

  h1 {
    font-size: 42px;
  }

  .metric-strip,
  .quick-verdict,
  .lead-note,
  .roadmap,
  .principles,
  .side-notes {
    grid-template-columns: 1fr;
  }

  .metric-strip div,
  .quick-verdict div {
    border-right: 0;
    border-bottom: 1px solid var(--line-strong);
  }

  .metric-strip div:last-child,
  .quick-verdict div:last-child {
    border-bottom: 0;
  }

  .lead-note {
    align-items: start;
  }

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

@media (max-width: 520px) {
  body {
    background-size: 22px 22px, 44px 44px, 44px 44px, auto;
  }

  .brand-title {
    font-size: 17px;
  }

  .top-nav a {
    padding-inline: 8px;
  }

  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .terminal-card pre,
  pre {
    font-size: 13px;
  }

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

  .state-table div {
    grid-template-columns: 1fr;
  }

  .state-table span {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .step-no {
    position: static;
    margin-bottom: 16px;
  }
}