@font-face {
  font-family: "Newsreader";
  src: url("assets/fonts/Newsreader-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Newsreader";
  src: url("assets/fonts/Newsreader-Medium.ttf") format("truetype");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Newsreader";
  src: url("assets/fonts/Newsreader-SemiBold.ttf") format("truetype");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Newsreader";
  src: url("assets/fonts/Newsreader-Italic-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "Newsreader";
  src: url("assets/fonts/Newsreader-Italic-Medium.ttf") format("truetype");
  font-weight: 500;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "Newsreader";
  src: url("assets/fonts/Newsreader-Italic-SemiBold.ttf") format("truetype");
  font-weight: 600;
  font-style: italic;
  font-display: swap;
}

:root {
  /* transitions-dev: text states swap */
  --text-swap-dur: 200ms;
  --text-swap-translate-y: 8px;
  --text-swap-blur: 2px;
  --text-swap-ease: ease-out;
  /* transitions-dev: panel reveal (adapted to X-axis for the mobile sidebar) */
  --panel-open-dur: 320ms;
  --panel-close-dur: 260ms;
  --panel-blur: 2px;
  --panel-ease: cubic-bezier(0.22, 1, 0.36, 1);

  --bg: #ffffff;
  --bg-tint: #f6f7fb;
  --ink: #0b0b0c;
  --ink-dim: #55575c;
  --ink-faint: #9a9ca1;
  --line: #dcdcdc;
  --line-strong: #d3d3d3;
  --accent: #0f54de;
  --accent-tint: #ebf1fd;
  --code-bg: #fafafa;
  --radius: 14px;
  --radius-sm: 8px;
  --font-display: "Newsreader", "Iowan Old Style", Georgia, serif;
  --shadow-card: 0 1px 2px rgba(11, 11, 12, 0.03), 0 6px 18px -12px rgba(11, 11, 12, 0.08);
  --shadow-hover: 0 2px 4px rgba(15, 84, 222, 0.06), 0 18px 40px -16px rgba(15, 84, 222, 0.18);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; overflow-x: hidden; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-weight: 400;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.mono {
  font-family: "JetBrains Mono", ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

::selection { background: var(--accent-tint); color: var(--ink); }

a { color: var(--accent); }

button:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------------- header ---------------- */

header.site {
  border-bottom: 1px solid var(--line);
  padding: 28px 0 26px;
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  z-index: 50;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.18em;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1;
  text-decoration: none;
}
.brand__mark {
  position: relative;
  display: inline-block;
  width: 0.86em;
  height: 0.86em;
  background: var(--accent);
  border-radius: 2px;
  margin: 0 0.04em;
  vertical-align: -0.05em;
}
.brand__mark::after {
  content: "";
  position: absolute;
  inset: 18%;
  background: #fff;
  border-radius: 1px;
}
.brand__cursor {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
  z-index: 2;
}
.brand__cursor svg {
  width: 50%;
  height: 50%;
  display: block;
}
.brand--small { font-size: 22px; font-weight: 500; }
.brand--small:hover { opacity: 0.85; }

.header-cta {
  font-family: "Inter", sans-serif;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.01em;
  color: #fff;
  background: var(--accent);
  padding: 10px 18px;
  border-radius: 999px;
  text-decoration: none;
  white-space: nowrap;
  transition: background .12s ease;
}

.header-cta:hover { background: #0d47c4; }

.mobile-menu-btn {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
}

.mobile-menu-btn span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--ink);
  border-radius: 999px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.header-meta {
  font-family: "Inter", sans-serif;
  font-weight: 600;
  font-size: 12.5px;
  color: var(--ink-faint);
  letter-spacing: 0.02em;
}


/* ---------------- docs shell ---------------- */

.docs-shell {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.docs-page-header {
  min-height: calc(100vh - 140px);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
  padding: 32px 0 32px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.docs-page-header-text {
  flex: 1 1 460px;
}

.docs-page-header-image {
  flex: 1 1 420px;
  max-width: 480px;
}

.docs-page-header-image img {
  width: 100%;
  height: auto;
  display: block;
}

@media (max-width: 900px) {
  .docs-page-header { flex-direction: column; align-items: flex-start; }
  .docs-page-header-image { display: none; }
}


.docs-page-header h1 {
  font-family: var(--font-display);
  font-size: clamp(31px, 4vw, 49px);
  line-height: 1.14;
  margin: 0 0 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-wrap: balance;
  max-width: 40ch;
}

.docs-page-header h1 .accent { color: var(--ink); }

.docs-page-header p {
  font-family: var(--font-display);
  color: var(--ink-dim);
  max-width: 66ch;
  font-size: 19px;
  margin: 0;
}

.docs-page-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  margin-top: 18px;
}

.docs-page-actions-row {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 6px;
  border: 1px solid #d8d9df;
  border-radius: 20px;
  background: linear-gradient(180deg, #fbfbfc 0%, #f3f4f7 100%);
  box-shadow: 0 14px 28px rgba(15, 22, 36, 0.06);
}

.page-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 14px;
  background: transparent;
  color: var(--ink-dim);
  font-family: "Inter", sans-serif;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: border-color .12s ease, background .12s ease, color .12s ease, box-shadow .12s ease;
}

.page-cta-arrow {
  display: inline-block;
  margin-left: 6px;
  opacity: 0.55;
  transition: transform .15s ease;
}

.page-cta:hover .page-cta-arrow {
  transform: translateY(2px);
}

.page-cta-primary {
  border-color: #d9dbe2;
  background: var(--bg);
  color: var(--ink);
  box-shadow: 0 8px 18px rgba(15, 22, 36, 0.08), 0 1px 2px rgba(11, 11, 12, 0.06);
}

.page-cta-primary:hover {
  border-color: var(--ink);
  color: var(--ink);
}

.page-cta-secondary {
  color: var(--ink-dim);
  background:
    linear-gradient(180deg, rgba(11, 11, 12, 0.035) 0%, rgba(11, 11, 12, 0.015) 100%);
}

.page-cta-secondary:hover {
  border-color: #d9dbe2;
  background: var(--bg);
  color: var(--ink);
}

.docs-sidebar {
  position: sticky;
  top: calc(var(--header-h, 89px) + 24px);
  max-height: calc(100vh - var(--header-h, 89px) - 48px);
  overflow-y: auto;
  overflow-x: hidden;
  padding: 24px 0 40px;
}

.docs-sidebar-mobile-top {
  display: none;
}

.docs-sidebar-close {
  border: none;
  background: none;
  color: var(--ink-dim);
  font-family: "Inter", sans-serif;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
}

.docs-nav {
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.docs-nav-section {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.docs-nav-label {
  font-family: "Inter", sans-serif;
  font-weight: 700;
  font-size: 10.5px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 8px;
}

.docs-nav-link {
  font-size: 13.5px;
  color: var(--ink-dim);
  text-decoration: none;
  padding: 5px 10px;
  margin: 0 -10px;
  border-radius: 5px;
  border-left: 2px solid transparent;
  transition: color .12s ease, background .12s ease, border-color .12s ease;
}

.docs-nav-link:hover {
  color: var(--ink);
  background: var(--code-bg);
}

.docs-nav-link.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--accent-tint);
  font-weight: 500;
}

.docs-main {
  min-width: 0;
  padding: 40px 0 80px;
}

.docs-section {
  padding-bottom: 56px;
  margin-bottom: 56px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 140px;
}

.docs-section:last-child {
  border-bottom: none;
}


.docs-eyebrow {
  font-family: "Inter", sans-serif;
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.docs-section h2 {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.005em;
  margin: 0 0 14px;
}

.docs-section h3 {
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: -0.005em;
  margin: 0 0 10px;
  scroll-margin-top: 140px;
}

.docs-section p {
  color: var(--ink-dim);
  font-size: 14.5px;
  max-width: 68ch;
  margin: 0 0 14px;
}

.docs-lead {
  color: var(--ink) !important;
  font-size: 16px !important;
}

.docs-list {
  margin: 0 0 14px;
  padding-left: 20px;
  color: var(--ink-dim);
  font-size: 14.5px;
  max-width: 68ch;
}

.docs-list li {
  margin-bottom: 8px;
}

.docs-list.compact {
  margin-bottom: 20px;
  font-size: 13.5px;
}

.docs-list.compact:last-child {
  margin-bottom: 0;
}

.docs-list.compact li:last-child {
  margin-bottom: 0;
}

/* lifecycle diagram */

.lifecycle-diagram {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 20px 0 18px;
}

.lifecycle-step {
  font-family: "Inter", sans-serif;
  font-weight: 600;
  font-size: 12.5px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--bg);
  color: var(--ink);
  white-space: nowrap;
}

.lifecycle-arrow {
  color: var(--ink-faint);
  font-size: 14px;
}

.lifecycle-return {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: -4px 0 18px;
  padding-left: 6px;
}

.lifecycle-return-arrow {
  color: var(--ink-faint);
  font-size: 16px;
  line-height: 1;
}

.lifecycle-return-line {
  width: 64px;
  height: 1px;
  background: var(--line-strong);
  flex-shrink: 0;
}

.lifecycle-return-label {
  font-family: "Inter", sans-serif;
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-faint);
}

/* overview blocks */

.mini-guide {
  display: flex;
  align-items: stretch;
  gap: 12px;
  margin: 20px 0 18px;
  flex-wrap: wrap;
}

.mini-guide-card {
  flex: 0 1 320px;
  min-height: 122px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, #ffffff 0%, #f8f8fa 100%);
  padding: 22px 16px 16px;
}

.mini-guide-label {
  display: inline-block;
  margin-bottom: 8px;
  font-family: "Inter", sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.mini-guide-card p {
  margin: 0;
  color: var(--ink);
  font-size: 14px;
}

.mini-guide-arrow {
  align-self: center;
  color: var(--ink-faint);
  font-size: 18px;
  font-weight: 700;
}

.video-embed {
  margin: 18px 0;
  max-width: 600px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--code-bg);
}

.video-embed-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
}

.video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.flow-intro {
  margin: 4px 0 12px;
}

.flow-intro-label {
  display: inline-block;
  margin-bottom: 6px;
  font-family: "Inter", sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.flow-intro p {
  margin: 0;
  color: var(--ink-dim);
  font-size: 14.5px;
}

.decision-table-wrap {
  overflow-x: auto;
  margin-top: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(180deg, #ffffff 0%, #fbfbfc 100%);
}

.decision-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

.decision-table th,
.decision-table td {
  text-align: left;
  vertical-align: top;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  font-size: 13.5px;
  color: var(--ink-dim);
}

.decision-table th {
  font-family: "Inter", sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
  background: #f8f8fa;
}

.decision-table td b {
  color: var(--ink);
}

.decision-table tbody tr:last-child td {
  border-bottom: none;
}

.failure-grid,
.mvl-grid,
.maturity-grid,
.toolkit-split,
.caution-grid {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

.failure-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-bottom: 18px;
}

.failure-card,
.mvl-card,
.maturity-card,
.toolkit-card,
.caution-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(180deg, #ffffff 0%, #fafafa 100%);
  padding: 18px;
  box-shadow: var(--shadow-card);
  transition: box-shadow .18s ease, transform .18s ease;
}

.mvl-card:hover,
.maturity-card:hover,
.toolkit-card:hover,
.caution-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-1px);
}

.maturity-level {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 9px;
  border-radius: 999px;
  background: #f1f2f4;
  color: var(--ink-dim);
  font-family: "Inter", sans-serif;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.failure-card h3,
.mvl-card h3,
.maturity-card h3,
.toolkit-card h3,
.caution-card h3 {
  margin-bottom: 6px;
}

.failure-card p,
.mvl-card p,
.maturity-card p,
.toolkit-card p,
.caution-card p {
  margin-bottom: 0;
  font-size: 13.5px;
}

.mvl-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.mvl-card {
  position: relative;
  padding-top: 44px;
}

.mvl-step {
  position: absolute;
  top: 16px;
  left: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--bg);
  font-family: "Inter", sans-serif;
  font-size: 11px;
  font-weight: 700;
}

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

.maturity-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.maturity-card p {
  margin-bottom: 12px;
}

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

.toolkit-card {
  background: linear-gradient(180deg, #ffffff 0%, #f7f7f8 100%);
}

.toolkit-card .docs-list.compact {
  margin-top: 14px;
}

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

.practice-layout {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

.practice-problem,
.practice-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(180deg, #ffffff 0%, #fafafa 100%);
  padding: 18px;
  box-shadow: var(--shadow-card);
  transition: box-shadow .18s ease, transform .18s ease;
}

.practice-problem:hover,
.practice-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-1px);
}

.practice-problem p,
.practice-card p {
  margin-bottom: 0;
  font-size: 13.5px;
}

.practice-grid,
.practice-resources {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.practice-label {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 9px;
  margin-bottom: 10px;
  border-radius: 999px;
  background: #f1f2f4;
  color: var(--ink-dim);
  font-family: "Inter", sans-serif;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.practice-card h3 {
  margin-bottom: 6px;
}

.practice-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.practice-chip {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: #f8f8fa;
  color: var(--ink);
  font-family: "Inter", sans-serif;
  font-size: 12px;
  font-weight: 500;
}

/* loop type + primitive blocks */

.loop-type-block,
.primitive-block {
  padding: 22px 0 0;
  scroll-margin-top: 140px;
}

.loop-type-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 24px;
  margin: 0 0 14px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--code-bg);
}

.loop-type-meta dt {
  font-family: "Inter", sans-serif;
  font-weight: 700;
  font-size: 10.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 2px;
}

.loop-type-meta dd {
  margin: 0;
  font-size: 13px;
  color: var(--ink);
}

.primitive-block h3 {
  margin-bottom: 6px;
}

/* source figures (curated third-party diagrams) */

.source-figure {
  margin: 18px 0;
  max-width: 600px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--code-bg);
}

.source-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.source-figure figcaption {
  padding: 10px 16px;
  font-size: 12.5px;
  color: var(--ink-faint);
  border-top: 1px solid var(--line);
}

.source-figure figcaption a {
  color: var(--ink-faint);
  text-decoration: underline;
}

.source-quote {
  margin: 14px 0;
  padding: 14px 18px;
  border-left: 3px solid var(--accent);
  background: var(--accent-tint);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 14px;
  line-height: 1.6;
}

.source-quote p {
  margin: 0;
}

.source-quote cite {
  display: block;
  margin-top: 8px;
  font-style: normal;
  font-size: 12.5px;
  color: var(--ink-faint);
}

.source-code {
  margin: 14px 0;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--code-bg);
  font-size: 12.5px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

/* loop hacks (going further) */

#loophacks-grid .card-desc {
  margin: 0 0 8px;
}

#loophacks-grid .card-desc:last-of-type {
  margin-bottom: 0;
}

#loophacks-grid .card-code-wrap {
  max-height: 340px;
  overflow-y: auto;
}

#loophacks-grid .code-header {
  position: sticky;
  top: 0;
  background: var(--code-bg);
  z-index: 1;
}

@media (max-width: 960px) {
  .docs-shell {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 0 24px;
  }
  .docs-main {
    order: 1;
  }
  .docs-sidebar {
    order: 2;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(320px, 84vw);
    max-height: none;
    padding: 22px 20px 24px;
    margin-bottom: 0;
    border-right: 1px solid var(--line);
    border-bottom: none;
    background: var(--bg);
    transform: translateX(-100%);
    opacity: 0;
    filter: blur(var(--panel-blur));
    transition:
      transform var(--panel-close-dur) var(--panel-ease),
      opacity   var(--panel-close-dur) var(--panel-ease),
      filter    var(--panel-close-dur) var(--panel-ease);
    will-change: transform, opacity, filter;
    z-index: 30;
  }
  body.mobile-nav-open .docs-sidebar {
    transform: translateX(0);
    opacity: 1;
    filter: blur(0);
    transition:
      transform var(--panel-open-dur) var(--panel-ease),
      opacity   var(--panel-open-dur) var(--panel-ease),
      filter    var(--panel-open-dur) var(--panel-ease);
  }
  @media (prefers-reduced-motion: reduce) {
    .docs-sidebar { transition: none !important; }
  }
  body.mobile-nav-open { overflow: hidden; }
  .docs-sidebar-mobile-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 20px;
  }
  .docs-sidebar-mobile-label {
    font-family: "Inter", sans-serif;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--ink-faint);
  }
  .docs-nav {
    gap: 22px;
    padding-bottom: 0;
  }
  .docs-page-header {
    min-height: auto;
    justify-content: flex-start;
    padding-top: 8px;
  }
  .docs-main { padding: 20px 0 56px; }
  .loop-type-meta { grid-template-columns: 1fr; }
  .failure-grid,
  .mvl-grid,
  .maturity-grid,
  .toolkit-split,
  .caution-grid,
  .practice-grid,
  .practice-resources,
  .guide-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .docs-shell { padding: 0 20px; }
  .header-cta { display: none; }
  .mobile-menu-btn { display: inline-flex; }
  .docs-section h2 { font-size: 20px; }
  .decision-table th,
  .decision-table td {
    padding: 12px 14px;
  }
  .mini-guide-arrow {
    display: none;
  }
}

/* ---------------- guide ---------------- */

.guide {
  padding: 26px 0 20px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(238,241,254,0.55) 0%, rgba(255,255,255,0) 100%);
}

.guide-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.35fr);
  gap: 18px;
}

.guide-block {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  padding: 18px 18px 16px;
}

.guide-label {
  font-family: "Inter", sans-serif;
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 10px;
}

.guide-block p {
  margin: 0 0 14px;
  color: var(--ink-dim);
  font-size: 14px;
  max-width: 60ch;
}

.guide-block p:last-child {
  margin-bottom: 0;
}

.guide-types {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 16px;
}

.guide-type span {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}

.guide-type p {
  font-size: 13px;
  line-height: 1.45;
}

/* ---------------- filters ---------------- */

.filters {
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 12px;
}

.filter-group:last-child { margin-bottom: 0; }

.filter-label {
  font-family: "Inter", sans-serif;
  font-weight: 700;
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-tint);
  padding: 4px 10px;
  border-radius: 999px;
  width: auto;
  min-width: 88px;
  text-align: center;
  flex-shrink: 0;
}

.chip {
  font-family: "Inter", sans-serif;
  font-weight: 500;
  font-size: 12.5px;
  padding: 7px 13px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--bg);
  color: var(--ink-dim);
  cursor: pointer;
  transition: border-color .12s ease, background .12s ease, color .12s ease;
  white-space: nowrap;
}

.chip:hover { border-color: var(--accent); color: var(--ink); }

.chip.active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--bg);
}

.chip .count {
  color: var(--ink-faint);
  margin-left: 5px;
}

.chip.active .count { color: rgba(255,255,255,0.55); }

.filter-clear {
  font-family: "Inter", sans-serif;
  font-weight: 500;
  font-size: 12px;
  color: var(--accent);
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px 4px;
  visibility: hidden;
}

.filter-clear.show { visibility: visible; }

/* ---------------- results meta ---------------- */

.results-meta {
  padding: 20px 0 4px;
  font-family: "Inter", sans-serif;
  font-weight: 600;
  font-size: 12.5px;
  color: var(--ink-faint);
}

/* ---------------- grid ---------------- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 18px;
  padding: 24px 0 80px;
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: border-color .12s ease;
}

.card:hover { border-color: #a9c3f5; }

.card-top {
  padding: 16px 16px 12px;
  border-bottom: 1px solid var(--line);
}

.card-tags {
  display: flex;
  gap: 6px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.tag {
  font-family: "Inter", sans-serif;
  font-weight: 600;
  font-size: 10.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--accent-tint);
  color: var(--accent);
}

.tag.stage {
  background: #f2f2f2;
  color: var(--ink-dim);
}

.tag.shape {
  background: #f6f8ff;
  color: #2940b9;
}

.tag.shape.skill {
  background: #eef7f1;
  color: #23724a;
}

.tag.shape.template {
  background: #fff4e8;
  color: #9c5b12;
}

.tag.shape.diagnostic {
  background: #fff1f1;
  color: #a53d3d;
}

.card-title {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 6px;
  letter-spacing: -0.005em;
  line-height: 1.3;
}

.card-desc {
  font-size: 13.5px;
  color: var(--ink-dim);
  margin: 0;
}

.card-meta {
  margin-top: 12px;
  display: grid;
  gap: 8px;
}

.card-best-for {
  margin: 0;
  font-size: 12.5px;
  color: var(--ink);
}

.card-best-for span,
.card-shape-note span {
  display: inline-block;
  margin-right: 8px;
  font-family: "Inter", sans-serif;
  font-size: 10.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.card-shape-note {
  margin: 0;
  font-size: 12.5px;
  color: var(--ink-dim);
}

.card-code-wrap {
  position: relative;
  background: var(--code-bg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 14px;
  border-bottom: 1px solid var(--line);
}

.code-header-label {
  font-family: "Inter", sans-serif;
  font-weight: 600;
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

pre.snippet {
  margin: 0;
  padding: 14px 16px;
  font-family: "JetBrains Mono", ui-monospace, "SF Mono", monospace;
  font-size: 12.5px;
  line-height: 1.6;
  color: #2b2d31;
  background: var(--code-bg);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.copy-btn {
  font-family: "Inter", sans-serif;
  font-weight: 600;
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0;
  border: none;
  background: none;
  color: var(--ink-faint);
  cursor: pointer;
  transition: color .12s ease;
  white-space: nowrap;
  flex-shrink: 0;
}

.copy-btn:hover { color: var(--accent); }

.copy-btn.copied { color: var(--accent); }

.copy-btn .t-text-swap {
  display: inline-block;
  transform: translateY(0);
  filter: blur(0);
  opacity: 1;
  transition:
    transform var(--text-swap-dur) var(--text-swap-ease),
    filter    var(--text-swap-dur) var(--text-swap-ease),
    opacity   var(--text-swap-dur) var(--text-swap-ease);
  will-change: transform, filter, opacity;
}
.copy-btn .t-text-swap.is-exit {
  transform: translateY(calc(var(--text-swap-translate-y) * -1));
  filter: blur(var(--text-swap-blur));
  opacity: 0;
}
.copy-btn .t-text-swap.is-enter-start {
  transform: translateY(var(--text-swap-translate-y));
  filter: blur(var(--text-swap-blur));
  opacity: 0;
  transition: none;
}

@media (prefers-reduced-motion: reduce) {
  .copy-btn .t-text-swap { transition: none !important; }
}

/* ---------------- empty state ---------------- */

.empty-state {
  padding: 64px 20px;
  text-align: center;
  color: var(--ink-faint);
  font-family: "Inter", sans-serif;
  font-size: 13.5px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  grid-column: 1 / -1;
}

.empty-state b { color: var(--ink-dim); }

/* ---------------- footer ---------------- */

footer.site {
  border-top: 1px solid var(--line);
  padding: 26px 0;
  font-family: "Inter", sans-serif;
  font-weight: 600;
  font-size: 11.5px;
  color: var(--ink-faint);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-logo {
  font-size: 14px;
  color: var(--ink-faint);
}

@media (max-width: 960px) {
  .wrap { padding: 0 24px; }
  .guide-grid { grid-template-columns: 1fr; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
}

@media (max-width: 640px) {
  .wrap { padding: 0 20px; }
  header.site { padding: 22px 0 20px; }
  .header-row { align-items: flex-start; }
  .header-meta { font-size: 12px; }
  .docs-page-header { padding: 30px 0 22px; }
  .docs-page-header h1 {
    font-size: clamp(24px, 9vw, 32px);
    max-width: none;
  }
  .docs-page-header p { font-size: 15px; }
  .guide { padding: 20px 0 16px; }
  .guide-block { padding: 16px; }
  .filter-label { width: auto; margin-right: 4px; }
  .filters { padding: 14px 0; }
  .filter-group { gap: 8px; }
  .chip { padding: 7px 11px; }
  .guide-grid,
  .guide-types { grid-template-columns: 1fr; }
  .results-meta { padding-top: 16px; }
  .grid {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 18px 0 56px;
  }
  .card-top { padding: 14px 14px 12px; }
  .card-title { font-size: 15px; }
  pre.snippet {
    padding: 13px 14px;
    font-size: 12px;
  }
  footer.site { padding: 22px 0; }
}

@media (max-width: 420px) {
  .wrap { padding: 0 16px; }
  .header-meta,
  .filter-label,
  .guide-label,
  .results-meta,
  footer.site {
    font-size: 11px;
  }
  .chip {
    font-size: 12px;
    padding: 6px 10px;
  }
  .tag {
    font-size: 10px;
    padding: 3px 7px;
  }
}