/* ==========================================================================
   Knowledge, Context and Agentic Engineering — platform stylesheet
   Shared by the start page and every workshop subpage. No build step.
   ========================================================================== */

/* ==========================================================================
   TOKENS
   The only place where literal values live. Everything below consumes var().
   Contrast ratios are against --paper unless noted.
   ========================================================================== */
:root {
  color-scheme: light;

  /* --- Typefaces ------------------------------------------------------- */
  --font-ui: "Space Grotesk", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "Cascadia Mono", Consolas, ui-monospace, monospace;

  /* --- Type scale ------------------------------------------------------ */
  --text-xs: 0.75rem;        /* uppercase micro labels */
  --text-sm: 0.8125rem;      /* module keys, datestamps, sequence numbers */
  --text-md: 0.875rem;       /* secondary lines, colophon */
  --text-lg: 0.9375rem;      /* card meta, status labels, imprint, nav */
  --text-body: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --text-title: 1.0625rem;   /* module heading */
  --text-card: 1.125rem;     /* card heading */
  --text-lede: clamp(1.0625rem, 1rem + 0.35vw, 1.25rem);
  --text-section: clamp(1.375rem, 1.2rem + 0.8vw, 1.75rem);
  --text-page: clamp(1.75rem, 1.3rem + 2vw, 2.5rem);   /* subpage title */
  --text-hero: clamp(2rem, 1.3rem + 3.2vw, 3.5rem);

  /* --- Spacing scale, 8px based ---------------------------------------- */
  --s1: 0.5rem;
  --s2: 1rem;
  --s3: 1.5rem;
  --s4: 2rem;
  --s5: 3rem;
  --s6: 4.5rem;
  --s7: 7rem;
  /* Sections are separated by these gaps alone, no rules. Each has to stay
     clearly larger than any gap inside a section for the order to read. */
  --gap-section: clamp(var(--s6), 9vw, var(--s7));
  --gap-block: clamp(var(--s5), 6vw, var(--s6));

  /* --- Ground and ink --------------------------------------------------- */
  --white: #FFFFFF;          /* raised information surfaces */
  --paper: #FDFDFB;          /* one ground for the whole site */
  --tint: #F3F3EF;           /* soft ground for media plates and code */
  --ink: #141413;            /* 18.1:1 */
  --ink-2: #3F3F3B;          /* 10.4:1 on paper, secondary reading text */
  --ink-3: #5B5B56;          /* 6.7:1 on paper, metadata and labels */
  --rule: #E4E4DE;           /* quiet object outline, decorative */
  --rule-mid: #90908A;       /* 3.2:1, visible lines: motif flow, underlines */
  --shadow-float: 0 10px 28px rgb(20 20 19 / 12%);

  /* --- Accent ----------------------------------------------------------- */
  /* One turquoise, clears AA, so the same value carries interactive text and
     the motif highlights without a second variant. */
  --accent: #0A7E7C;         /* 4.8:1 */

  /* --- Identity palette, derived from the watercolor logo ---------------- */
  /* Four families measured in the mark itself. Used only as module marks, never
     for text, so each is tuned for presence as a small filled shape (>=3:1).
     The blue stays watercolor-light on purpose, the violet stays deep. */
  --c-orange: #C87000;       /* 3.6:1 */
  --c-blue:   #5B8FC4;       /* 3.3:1 */
  --c-green:  #7C9200;       /* 3.5:1 */
  --c-violet: #8140B8;       /* 6.1:1 */

  /* --- Module identity --------------------------------------------------- */
  /* One colour per module, shared by the module list and concept marks. */
  --m1: var(--accent);       /* Understanding Large Language Models   paper 4.8:1 */
  --m2: var(--c-orange);     /* Prompt Engineering                    ink   5.1:1 */
  --m3: var(--c-blue);       /* Knowledge and Context Engineering     ink   5.5:1 */
  --m4: var(--c-violet);     /* Agentic Engineering                   paper 6.2:1 */
  --m5: var(--c-green);      /* Critical Perspectives and Governance  ink   5.2:1 */

  /* --- Layout ----------------------------------------------------------- */
  --measure: 60ch;           /* reading width for prose */
  --page: 1160px;
  --radius: 3px;
  --tap: 2.75rem;
  --tap-compact: 2.5rem;
  --z-sticky: 10;
}

/* ==========================================================================
   BASE
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: var(--text-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  margin: 0;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

p, ul, ol { margin: 0; }

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: var(--rule-mid);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}
a:hover { text-decoration-color: var(--accent); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: fixed;
  z-index: calc(var(--z-sticky) + 1);
  inset: var(--s1) auto auto var(--s1);
  width: max-content;
  max-width: calc(100vw - 2 * var(--s1));
  padding: var(--s1) var(--s2);
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow-float);
  color: var(--ink);
  font-size: var(--text-md);
  text-decoration: none;
  transform: translateY(calc(-100% - var(--s2)));
}

.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

img { max-width: 100%; height: auto; }

/* ==========================================================================
   LAYOUT PRIMITIVES
   ========================================================================== */
.wrap {
  width: min(100% - 2 * var(--s3), var(--page));
  margin-inline: auto;
}

.section {
  padding-top: var(--gap-section);
  scroll-margin-top: var(--s4);
}

.section-title { font-size: var(--text-section); }

/* One line under a section title, where the section needs a reading key. */
.section-lede {
  max-width: var(--measure);
  margin-top: var(--s2);
  color: var(--ink-2);
}

/* Horizontal escape hatch for content that cannot compress further. */
.scroll-x {
  overflow-x: auto;
  overscroll-behavior-x: contain;
}

/* The one component for artefacts that do not exist yet. Micro gaps stay
   em-relative so they track the type size. */
.pending {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  color: var(--ink-3);
  font-size: var(--text-lg);
}
.pending::before {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  border: 1px solid var(--rule-mid);
  border-radius: 50%;
}

/* Datestamp, the one place where the mono face carries editorial weight. */
.stamp {
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ==========================================================================
   HEADER AND NAVIGATION
   ========================================================================== */
.site-head > .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--s2) var(--s4);
  padding-top: var(--s3);
}

.head-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: var(--s2) var(--s4);
}

.site-identity {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: var(--s2);
  flex: 1 1 30rem;
  max-width: 34rem;
  min-width: 0;
}

.site-identity-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: var(--tap-compact);
  min-height: var(--tap-compact);
  text-decoration: none;
}

.site-identity-logo img { width: auto; height: 34px; }

.site-identity-title {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  color: var(--ink);
  font-weight: 600;
  line-height: 1.2;
  text-wrap: balance;
  text-decoration: none;
}
.site-identity-title:hover { text-decoration: underline; text-decoration-color: var(--rule-mid); }

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s3);
  padding: 0;
  list-style: none;
  font-size: var(--text-lg);
}
.site-nav a {
  display: inline-flex;
  align-items: center;
  color: var(--ink-2);
  text-decoration: none;
}
.site-nav a:hover,
.site-nav a:focus-visible { color: var(--accent); }

.language-nav {
  display: inline-flex;
  padding: 2px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--tint);
}
.language-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.55rem;
  min-height: var(--tap-compact);
  padding: 0.28rem 0.7rem;
  border-radius: 999px;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
}
.language-nav a[aria-current="page"] {
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 0 0 1px var(--rule);
}

.language-nav a:hover,
.language-nav a:focus-visible {
  background: var(--white);
  color: var(--ink);
}

/* ==========================================================================
   HERO
   The title and abstract form the reading column; the five module titles form
   the compact index beside it.
   ========================================================================== */
.hero { padding-block: clamp(var(--s4), 4vw, var(--s5)) var(--s4); }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(18rem, 0.8fr);
  align-items: start;
  gap: var(--s4) var(--s6);
}

.hero h1 {
  max-width: 20ch;
  font-size: var(--text-hero);
}

.hero-copy p {
  max-width: var(--measure);
  margin-top: var(--s3);
  color: var(--ink-2);
  font-size: var(--text-body);
  line-height: 1.65;
}

.hero-copy .hero-preparation {
  margin-top: var(--s2);
  font-size: var(--text-lg);
}

.term {
  --term-color-a: var(--m1);
  --term-color-b: var(--term-color-a);
  position: relative;
  display: inline-block;
}

.term--m1 { --term-color-a: var(--m1); }
.term--m2 { --term-color-a: var(--m2); }
.term--m3 { --term-color-a: var(--m3); }
.term--m4 { --term-color-a: var(--m4); }
.term--m5 { --term-color-a: var(--m5); }

.term--m1-m4 {
  --term-color-a: var(--m1);
  --term-color-b: var(--m4);
}

.term-trigger {
  padding: 0 0.02em 0.06em;
  border: 0;
  background-color: transparent;
  background-image: linear-gradient(90deg, var(--term-color-a) 0 50%, var(--term-color-b) 50% 100%);
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 100% 0.075em;
  color: inherit;
  font: inherit;
  line-height: inherit;
  cursor: help;
}

.term-trigger:hover,
.term-trigger:focus-visible {
  background-size: 100% 0.1em;
}

.term-trigger:focus-visible {
  border-radius: 2px;
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.term-tooltip {
  position: absolute;
  z-index: 10;
  inset-block-start: calc(100% + 0.45rem);
  inset-inline-start: 0;
  width: min(21rem, calc(100vw - 2rem));
  padding: calc(0.7rem + 3px) 0.8rem 0.7rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background:
    linear-gradient(90deg, var(--term-color-a) 0 50%, var(--term-color-b) 50% 100%) top / 100% 3px no-repeat,
    var(--white);
  box-shadow: var(--shadow-float);
  color: var(--ink);
  font-size: var(--text-sm);
  line-height: 1.45;
  text-align: start;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.term:hover .term-tooltip,
.term:focus-within .term-tooltip,
.term:active .term-tooltip {
  opacity: 1;
  visibility: visible;
}

.hero-modules {
  scroll-margin-top: var(--s4);
}

@media (min-width: 861px) {
  .hero-modules {
    align-self: center;
    padding-inline-start: var(--s3);
  }
}

.hero-modules h2 {
  font-size: var(--text-section);
}

/* ==========================================================================
   MODULES
   The single home of the identity palette. Each module carries one small mark,
   turquoise plus the four logo colours, assigned by position.
   ========================================================================== */
.module-list {
  display: grid;
  gap: var(--s1);
  margin-top: var(--s3);
  padding: 0;
  list-style: none;
}

.module-list li {
  display: grid;
  grid-template-columns: 4.35em minmax(0, 1fr);
  align-items: start;
  min-width: 0;
  padding-block: 0.25rem;
}

.module-list .key {
  display: flex;
  align-items: center;
  gap: 0.5em;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.module-list .module-icon,
.module-series__icon,
.video-module__summary .module-icon,
.video-module__summary-icon {
  display: inline-block;
  flex: none;
  width: 1.5rem;
  height: 1.5rem;
  background: currentColor;
  -webkit-mask: var(--module-icon) center / contain no-repeat;
  mask: var(--module-icon) center / contain no-repeat;
  color: var(--module-color);
}

/* Each portable icon carries one specific conceptual relation. Colour remains
   an additional module cue; the adjacent number and title carry the meaning. */
.module-list li.m1,
.module-series__item.m1,
.video-module.m1 { --module-color: var(--m1); --module-icon: url("modules/01-understanding-llms.svg"); }
.module-list li.m2,
.module-series__item.m2,
.video-module.m2 { --module-color: var(--m2); --module-icon: url("modules/02-prompt-engineering.svg"); }
.module-list li.m3,
.module-series__item.m3,
.video-module.m3 { --module-color: var(--m3); --module-icon: url("modules/03-knowledge-context-engineering.svg"); }
.module-list li.m4,
.module-series__item.m4,
.video-module.m4 { --module-color: var(--m4); --module-icon: url("modules/04-agentic-engineering.svg"); }
.module-list li.m5,
.module-series__item.m5,
.video-module.m5 { --module-color: var(--m5); --module-icon: url("modules/05-critical-perspectives-governance.svg"); }

.module-list h3 {
  min-width: 0;
  font-size: var(--text-title);
  line-height: 1.2;
  text-wrap: balance;
}

.module-list li > a {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: 4.35em minmax(0, 1fr);
  align-items: start;
  min-height: var(--tap-compact);
  padding-block: 0.25rem;
  color: var(--ink);
  line-height: 1.2;
  text-decoration: none;
}

.module-list li > a:hover,
.module-list li > a:focus-visible { background: var(--tint); }

/* Compact module coverage for workshop cards. The number remains readable
   without colour; the complete module name remains available to assistive
   technology through the visually hidden name. */
.module-series {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s1) var(--s2);
  min-width: 0;
}

.module-series__label {
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.module-series__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s1);
  min-width: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.module-series__item {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.25em;
  min-width: 0;
}

.module-series__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.25em;
  min-width: var(--tap-compact);
  min-height: var(--tap-compact);
  padding-inline: 0.4rem;
  border-radius: var(--radius);
  color: inherit;
  text-decoration: none;
}

.module-series__link:hover,
.module-series__link:focus-visible {
  background: var(--tint);
  color: var(--ink);
}

/* The tooltip supplements the link's visible number and accessible name. It is
   absent from layout until requested, so hidden tips cannot create overflow. */
.module-series__link[data-tooltip]::after {
  position: absolute;
  z-index: calc(var(--z-sticky) + 1);
  bottom: calc(100% + 0.4rem);
  left: 50%;
  display: none;
  width: max-content;
  max-width: min(18rem, calc(100vw - 2 * var(--s2)));
  padding: 0.45rem 0.65rem;
  border-radius: var(--radius);
  background: var(--ink);
  box-shadow: var(--shadow-float);
  color: var(--paper);
  content: attr(data-tooltip);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1.35;
  text-align: left;
  white-space: normal;
  overflow-wrap: anywhere;
  pointer-events: none;
  transform: translateX(-50%);
}

.module-series__link[data-tooltip]:hover::after,
.module-series__link[data-tooltip]:focus-visible::after { display: block; }

.module-series__item:first-child .module-series__link[data-tooltip]::after,
.module-series__item:nth-child(2) .module-series__link[data-tooltip]::after {
  left: 0;
  transform: none;
}

.module-series__item:last-child .module-series__link[data-tooltip]::after,
.module-series__item:nth-last-child(2) .module-series__link[data-tooltip]::after {
  right: 0;
  left: auto;
  transform: none;
}

.module-series__icon {
  width: 1.25rem;
  height: 1.25rem;
}

.module-series__number {
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.visually-hidden,
.module-series__name {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.card--in-preparation .module-series__icon {
  filter: saturate(0.55);
  opacity: 0.62;
}

.card--in-preparation .module-series__link:hover,
.card--in-preparation .module-series__link:focus-visible { background: var(--paper); }

.card--in-preparation .module-series__number { color: var(--ink-3); }

/* ===========================================================================
   MEDIA PLATE
   The real title slide, always in the same 16:9 proportion.
   ========================================================================== */
.plate {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--tint);
}

/* ==========================================================================
   WORKSHOP TIMELINE AND CARDS
   The ordered list retains chronology without CSS. The line and nodes expose
   editorial material status visually; every state also has a text label.
   ========================================================================== */
.workshop-timeline {
  --timeline-axis: 11.75rem;
  --timeline-date-width: 10rem;
  --timeline-column-gap: 3.5rem;
  position: relative;
  display: grid;
  gap: var(--s3);
  margin-top: var(--s4);
  padding: 0;
  list-style: none;
}

.workshop-timeline::before {
  position: absolute;
  top: 0.7rem;
  bottom: 0.7rem;
  left: var(--timeline-axis);
  width: 1px;
  background: var(--rule-mid);
  content: "";
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: var(--timeline-date-width) minmax(0, 1fr);
  column-gap: var(--timeline-column-gap);
  min-width: 0;
}

.timeline-item::before {
  position: absolute;
  z-index: 1;
  top: 0.7rem;
  left: var(--timeline-axis);
  width: 0.75rem;
  height: 0.75rem;
  border: 2px solid var(--rule-mid);
  border-radius: 50%;
  background: var(--paper);
  content: "";
  transform: translate(-50%, -50%);
}

.timeline-item--released::before {
  border-color: var(--accent);
  background: var(--accent);
}

.timeline-date {
  align-self: start;
  min-width: 0;
  color: var(--ink);
  text-align: right;
}

.timeline-date time {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.timeline-date-day,
.timeline-date-month,
.timeline-date-detail {
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.timeline-date-day {
  font-size: var(--text-md);
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1.25;
}

.timeline-date-month,
.timeline-date-detail {
  color: var(--ink-3);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  line-height: 1.35;
}

.timeline-date-detail { margin-top: 0.4em; }

.card {
  display: grid;
  grid-template-columns: minmax(0, 310px) minmax(0, 1fr);
  height: 100%;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--white);
  transition: border-color 140ms ease;
}
.card:hover { border-color: var(--accent); }
.card:focus-within { border-color: var(--accent); }

.card--in-preparation {
  border-color: var(--rule);
  background: var(--tint);
}

.card--in-preparation:hover { border-color: var(--rule-mid); }

.card--in-preparation .card-cover img {
  filter: grayscale(1);
  opacity: 0.36;
}

/* The cover slot holds proportion and ground on its own, so an id whose PNG
   has not been produced yet leaves a quiet plate instead of a broken image. */
.card-cover {
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: calc(var(--radius) - 1px) 0 0 calc(var(--radius) - 1px);
  background: var(--tint);
}
.card-cover img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-body {
  display: flex;
  flex-direction: column;
  gap: var(--s2);
  min-width: 0;
  padding: var(--s3);
}

.card h3 { font-size: var(--text-card); }
/* The title is the link to the subpage. The arrow carries the affordance, so
   the underline stays off until hover and a two-line title reads as a title. */
.card h3 a {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap);
  color: inherit;
  text-decoration: none;
  overflow-wrap: anywhere;
}
.card h3 a:hover,
.card h3 a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: var(--accent);
}
.card h3 a::after {
  content: "\2192";
  display: inline-block;
  margin-left: 0.3em;
  color: var(--accent);
  transition: transform 140ms ease;
}
.card:hover h3 a::after { transform: translateX(3px); }

.card-meta {
  display: grid;
  gap: 0.45em;
  margin: 0;
  color: var(--ink-2);
  font-size: var(--text-md);
  line-height: 1.45;
}

.card-meta > div {
  display: grid;
  grid-template-columns: 8rem minmax(0, 1fr);
  gap: var(--s2);
}

.card-meta dt {
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.card-meta dd { margin: 0; }

.card .spec {
  max-width: 66ch;
  color: var(--ink-2);
  font-size: var(--text-lg);
  line-height: 1.55;
}
.card-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s1) var(--s2);
  margin-top: auto;
  padding-top: var(--s2);
  font-size: var(--text-lg);
}
.card-foot .links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s1) var(--s2);
}

.material-state {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  color: var(--ink-3);
}

.material-state::before {
  width: 0.5rem;
  height: 0.5rem;
  border: 1px solid var(--rule-mid);
  border-radius: 50%;
  background: transparent;
  content: "";
}

.material-state--released { color: var(--ink-2); }
.material-state--released::before {
  border-color: var(--accent);
  background: var(--accent);
}

.material-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
}

.material-link img {
  width: 1.4rem;
  height: 1.4rem;
}

/* ==========================================================================
   WORKSHOP SUBPAGE
   ========================================================================== */
.backlink {
  display: inline-block;
  margin-top: var(--s4);
  color: var(--ink-3);
  font-size: var(--text-lg);
  text-decoration-color: var(--rule);
}
.backlink:hover { color: var(--accent); }

.page-head {
  max-width: 920px;
  padding-block: var(--s5) 0;
}
.page-head h1 {
  margin-top: var(--s2);
  font-size: var(--text-page);
}
.page-head .event {
  margin-top: var(--s3);
  max-width: 62ch;
  color: var(--ink-2);
  font-size: var(--text-lede);
  line-height: 1.5;
}
.page-head .facts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s1) var(--s3);
  margin-top: var(--s3);
  color: var(--ink-3);
  font-size: var(--text-md);
  line-height: 1.6;
}
.page-head .facts span { display: inline-flex; align-items: baseline; gap: 0.35em; }
.page-head .facts b { color: var(--ink-2); font-weight: 500; }
.page-head > .module-series { margin-top: var(--s3); }

.block { padding-top: var(--gap-block); }
.block h2 { font-size: var(--text-section); }
.block > p,
.block > .prose {
  max-width: var(--measure);
  margin-top: var(--s3);
  color: var(--ink-2);
}
.media-download { margin-top: var(--s2); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s1) var(--s3);
}
.section-head .action { font-size: var(--text-lg); }

.media-frame {
  position: relative;
  width: 100%;
  margin-top: var(--s3);
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--tint);
  box-shadow: 0 14px 38px color-mix(in srgb, var(--ink) 8%, transparent);
}
.media-frame.slides { aspect-ratio: 16 / 9; }
.media-frame.reader { height: min(76vh, 900px); min-height: 560px; }
.media-frame iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}
.media-pending {
  display: grid;
  min-height: 18rem;
  place-items: center;
  padding: var(--s4);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--tint);
  color: var(--ink-3);
  text-align: center;
}
.media-pending p { max-width: 42ch; }

.overview-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s4) var(--s5);
  margin-top: var(--s5);
  padding-top: var(--s4);
  border-top: 1px solid var(--rule);
}
.overview-grid article { min-width: 0; }
.overview-grid article:first-child { grid-column: 1 / -1; }
.overview-grid article:not(:first-child) {
  padding-top: var(--s3);
  border-top: 1px solid var(--rule);
}
.overview-grid h2 { font-size: var(--text-section); }
.overview-grid p,
.overview-grid ol,
.overview-grid ul {
  margin-top: var(--s2);
  color: var(--ink-2);
}
.overview-grid article:first-child p { max-width: var(--measure); }
.overview-grid ol,
.overview-grid ul {
  padding-left: 1.2em;
}
.overview-grid li + li { margin-top: var(--s2); }
.overview-grid time {
  display: block;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.references {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  max-width: 68ch;
  margin-top: var(--s3);
  padding: 0;
  list-style: none;
}
.references li {
  padding-top: var(--s2);
  border-top: 1px solid var(--rule);
  color: var(--ink-2);
  font-size: var(--text-lg);
}
.references .what {
  display: block;
  margin-top: 0.25em;
  color: var(--ink-3);
  font-size: var(--text-md);
}

#references {
  margin-top: var(--s5);
  padding-top: var(--s4);
  border-top: 1px solid var(--rule);
}

/* Browser-native workshop sequence. It uses ordinary document scrolling and
   content height; the sticky index only provides direct anchor access. */
.web-module__head > p {
  max-width: var(--measure);
  margin-top: var(--s2);
  color: var(--ink-2);
}

.web-module__sequence {
  display: grid;
  grid-template-columns: minmax(11rem, 0.24fr) minmax(0, 1fr);
  align-items: start;
  gap: var(--s5);
  margin-top: var(--s4);
}

.web-module__nav {
  position: sticky;
  top: var(--s3);
  padding-left: var(--s2);
  border-left: 1px solid var(--rule);
}

.web-module__nav > p,
.web-module__number {
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.web-module__nav ol {
  display: grid;
  gap: 0.25rem;
  margin-top: var(--s1);
  padding: 0;
  list-style: none;
}

.web-module__nav a {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  align-items: center;
  min-height: var(--tap-compact);
  padding: 0.35rem var(--s1);
  color: var(--ink-2);
  font-size: var(--text-lg);
  line-height: 1.2;
  text-decoration: none;
}

.web-module__nav a:hover,
.web-module__nav a:focus-visible { background: var(--tint); color: var(--accent); }
.web-module__nav a > span { color: var(--ink-3); font-family: var(--font-mono); font-size: var(--text-sm); }

.web-module__units { min-width: 0; }

.web-module__unit {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: var(--s4) var(--s5);
  min-width: 0;
  padding-top: var(--s4);
  border-top: 1px solid var(--rule);
  scroll-margin-top: var(--s4);
}

.web-module__unit + .web-module__unit { margin-top: var(--s5); }

.web-module__unit-head {
  display: flex;
  grid-column: 1 / -1;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: var(--s2);
}

.web-module__unit-head h3 {
  margin-top: 0.25rem;
  font-size: var(--text-section);
}

.web-module__visual {
  min-width: 0;
  padding: var(--s3);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--tint);
  color: var(--ink-2);
}

.web-module__copy {
  min-width: 0;
  max-width: var(--measure);
  color: var(--ink-2);
}

.web-module__copy p + p { margin-top: var(--s2); }
.web-module__check { padding-left: var(--s2); border-left: 2px solid var(--accent); color: var(--ink); }

.web-module__flow {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s1);
}

.web-module__step {
  display: grid;
  align-content: center;
  min-width: 0;
  min-height: 4.5rem;
  padding: var(--s1);
  border-left: 3px solid var(--accent);
  background: var(--white);
  font-weight: 500;
}

.web-module__step small,
.web-module__evidence small,
.web-module__gates small {
  display: block;
  margin-top: 0.2rem;
  color: var(--ink-3);
  font-size: var(--text-sm);
  font-weight: 400;
  line-height: 1.35;
}

.web-module__matrix { display: grid; border-bottom: 1px solid var(--rule); font-size: var(--text-sm); }
.web-module__matrix > div {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s1);
  padding-block: var(--s1);
  border-top: 1px solid var(--rule);
}
.web-module__matrix > div:first-child { color: var(--ink); }
.web-module__matrix span,
.web-module__matrix b { min-width: 0; overflow-wrap: anywhere; }

.web-module__evidence { display: grid; gap: var(--s1); }
.web-module__evidence > div,
.web-module__evidence pre {
  margin: 0;
  padding: var(--s2);
  border-left: 3px solid var(--m3);
  background: var(--white);
}
.web-module__evidence > div { display: grid; }
.web-module__evidence > div > span { color: var(--ink-3); font-family: var(--font-mono); font-size: var(--text-sm); }
.web-module__evidence pre {
  border-left-color: var(--m5);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.45;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.web-module__build { display: grid; gap: var(--s2); text-align: center; }
.web-module__build > div {
  display: grid;
  gap: 0.25rem;
  padding: var(--s2);
  border: 1px solid var(--rule);
  background: var(--white);
}
.web-module__build > div > span { color: var(--ink-3); font-size: var(--text-sm); }
.web-module__build .web-module__build-output {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-color: var(--m4);
  background: transparent;
}
.web-module__build-output span { color: var(--ink-2); overflow-wrap: anywhere; }

.web-module__gates { display: grid; gap: var(--s1); margin: 0; padding: 0; list-style: none; }
.web-module__gates li {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: var(--s1);
  align-items: start;
  padding: var(--s1);
  background: var(--white);
}
.web-module__gates li > span {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 1px solid var(--m5);
  border-radius: 50%;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

/* Link rows with an explicit state, so a missing artefact never becomes a
   dead link. */
.linklist {
  display: grid;
  gap: var(--s2);
  max-width: var(--measure);
  margin-top: var(--s3);
  padding: 0;
  list-style: none;
}
.linklist li { font-size: var(--text-lg); }
.linklist .what { display: block; color: var(--ink-3); font-size: var(--text-md); }

/* Material bundle. The same strip repeats in every block of a workshop page, so
   an instructor finds the right link at a glance while teaching. Artefacts that
   do not exist yet appear here as a state, never as a dead link. */
.bundle {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--s1) var(--s3);
  margin-top: var(--s3);
  padding: var(--s2) var(--s3);
  border-radius: var(--radius);
  background: var(--tint);
  font-size: var(--text-lg);
}
.bundle .label {
  flex: none;
  min-width: 7em;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.bundle .items {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--s1) var(--s2);
}
.bundle .sep { color: var(--rule-mid); }

.prompt {
  max-width: var(--measure);
  margin: var(--s3) 0 0;
  padding: var(--s3);
  border: 1px solid var(--rule);
  border-left: 2px solid var(--accent);
  border-radius: var(--radius);
  background: var(--tint);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: var(--text-md);
  line-height: 1.7;
  white-space: pre-wrap;
  overflow-x: auto;
}

/* ==========================================================================
   PREPARATION PAGE
   ========================================================================== */
.block { scroll-margin-top: var(--s4); }

.site-nav a[aria-current="page"] {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-underline-offset: 0.3em;
}

.block > .stamp { margin-top: 0; color: var(--ink-3); }
.block > .stamp + h2 { margin-top: var(--s1); }
.block h3 { margin-top: var(--s4); font-size: var(--text-title); }

code { font-family: var(--font-mono); font-size: 0.9em; }
.cmd { margin-top: var(--s2); white-space: pre; }
.cmd code { font-size: 1em; }

.cmds { max-width: var(--measure); margin-top: var(--s3); }
.cmds > div + div { margin-top: var(--s3); }
.cmds dt { color: var(--ink-3); font-size: var(--text-md); }
.cmds dd { margin: 0; }
.cmds .cmd { margin-top: var(--s1); }

.steps {
  max-width: var(--measure);
  margin-top: var(--s3);
  padding-left: 1.7em;
  color: var(--ink-2);
}
.steps > li + li { margin-top: var(--s2); }
.steps li::marker { color: var(--ink-3); font-family: var(--font-mono); font-size: var(--text-sm); }
.steps .cmd,
.steps .cmds { max-width: none; }

.levels .dot { border: 1px solid var(--rule-mid); }
.levels li:nth-child(2) .dot { border-color: var(--accent); }
.levels li:nth-child(3) .dot { border-color: var(--accent); background: var(--accent); }

.table {
  min-width: 46rem;
  width: 100%;
  margin-top: var(--s3);
  border-collapse: collapse;
  font-size: var(--text-lg);
}
.table th,
.table td {
  padding: var(--s2) var(--s3) var(--s2) 0;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
}
.table th {
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.table td { color: var(--ink-2); }
.table tbody th {
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: var(--text-lg);
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}
.table .lvl { color: var(--ink); font-family: var(--font-mono); font-size: var(--text-md); white-space: nowrap; }

/* ===========================================================================
   START PAGE RESOURCES
   The three maintained teaching holdings use separate marks and equal cards.
   ========================================================================== */
.resource-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
  gap: var(--s3);
  margin-top: var(--s4);
}

.resource-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  padding: var(--s3);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--white);
}

.resource-card:hover,
.resource-card:focus-within { border-color: var(--accent); }

.resource-summary {
  display: grid;
  grid-template-columns: 6rem minmax(0, 1fr);
  align-items: center;
  gap: var(--s2);
  min-width: 0;
}

.resource-mark {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
  background: var(--white);
}

.resource-copy {
  min-width: 0;
}

.resource-kind {
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.resource-card h3 {
  margin-top: var(--s1);
  font-size: var(--text-card);
}

.resource-card h3 a {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap-compact);
  color: var(--ink);
  text-decoration-color: var(--accent);
  text-decoration-thickness: 0.1em;
  text-underline-offset: 0.16em;
}

.resource-card h3 a:hover,
.resource-card h3 a:focus-visible { color: var(--accent); }

.resource-copy > p:not(.resource-kind, .resource-links) {
  margin-top: var(--s2);
  color: var(--ink-2);
  font-size: var(--text-lg);
}

.resource-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s2);
  margin-top: var(--s3);
}

.resource-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s1);
  margin-top: var(--s2);
  padding: 0;
  list-style: none;
}

.resource-card > .resource-actions {
  margin-top: auto;
  padding-top: var(--s2);
}

.resource-editions {
  display: grid;
  gap: var(--s1);
  margin-top: var(--s2);
}

.resource-edition {
  padding-top: var(--s1);
  border-top: 1px solid var(--rule);
}

.resource-edition-label {
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.resource-edition .resource-actions { margin-top: var(--s1); }

.resource-action {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  min-height: var(--tap-compact);
  padding: 0.35em 0.65em;
  border: 1px solid var(--rule-mid);
  border-radius: 999px;
  background: var(--white);
  color: var(--ink);
  font-size: var(--text-sm);
  line-height: 1.1;
  text-decoration: none;
  white-space: nowrap;
}

a.resource-action:hover,
a.resource-action:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.resource-action img {
  width: 1rem;
  height: 1rem;
}

.resource-action--pending {
  border-color: var(--rule);
  background: var(--tint);
  color: var(--ink-3);
}

/* Focused routes that extend individual modules without a second runtime. */
.deep-dives {
  padding-top: var(--s4);
}

.deep-dives .section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(18rem, 1fr);
  align-items: end;
  gap: var(--s3) var(--s5);
  padding-bottom: var(--s3);
  border-bottom: 1px solid var(--rule);
}

.deep-dives .section-lede {
  margin: 0;
  max-width: var(--measure);
}

.deep-dive-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s3);
  margin-top: var(--s3);
}

.deep-dive-card {
  min-width: 0;
  padding: var(--s3);
  border: 1px solid var(--rule);
  background: var(--paper);
}

.deep-dive-card--pending {
  background: var(--tint);
}

.deep-dive-kind,
.deep-dive-state {
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.deep-dive-card h3 {
  margin-top: var(--s1);
  font-size: var(--text-card);
  line-height: 1.25;
}

.deep-dive-card h3 + p {
  margin-top: var(--s2);
  color: var(--ink-2);
}

/* ===========================================================================
   VIDEO LIBRARY
   Native details elements preserve disclosure semantics and keyboard support.
   Every module group carries the same icon and colour relation as the module
   list; video cards use YouTube's 16:9 preview without changing the image.
   ========================================================================== */
.video-library {
  display: grid;
  gap: var(--s2);
  min-width: 0;
  margin-top: var(--s4);
}

.video-module {
  min-width: 0;
  overflow: clip;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--module-color, var(--rule-mid));
  border-radius: var(--radius);
  background: var(--white);
}

.video-module__summary {
  min-width: 0;
  min-height: var(--tap);
  padding: var(--s2) var(--s3);
  color: var(--ink);
  font-weight: 600;
  line-height: 1.35;
  overflow-wrap: anywhere;
  cursor: pointer;
}

.video-module__summary::marker { color: var(--module-color, var(--accent)); }

.video-module__summary:hover { background: var(--tint); }

.video-module__summary:focus-visible {
  outline-offset: -3px;
  background: var(--tint);
}

.video-module__summary .module-icon,
.video-module__summary-icon {
  width: 1.5rem;
  height: 1.5rem;
  margin-inline: 0.4em 0.35em;
  vertical-align: -0.4em;
}

.video-module[open] > .video-module__summary {
  border-bottom: 1px solid var(--rule);
  background: var(--tint);
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s2);
  min-width: 0;
  margin: 0;
  padding: var(--s3);
  list-style: none;
}

.video-grid > * { min-width: 0; }

.video-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--white);
  transition: border-color 140ms ease;
}

.video-card:hover,
.video-card:focus-within { border-color: var(--module-color, var(--accent)); }

.video-card > a,
.video-card__link {
  display: flex;
  flex: 1;
  flex-direction: column;
  min-width: 0;
  color: var(--ink);
  text-decoration: none;
}

.video-card > a:hover,
.video-card > a:focus-visible,
.video-card__link:hover,
.video-card__link:focus-visible { color: var(--accent); }

.video-card > a:focus-visible,
.video-card__link:focus-visible { outline-offset: -3px; }

.video-card__media {
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--tint);
}

.video-card__media img,
.video-card > a > img,
.video-card__thumbnail,
.video-card > img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: var(--tint);
}

.video-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: var(--s1);
  min-width: 0;
  padding: var(--s2);
}

.video-card h3,
.video-card__title {
  font-size: var(--text-title);
  overflow-wrap: anywhere;
}

.video-card > a > h3,
.video-card__link > .video-card__title,
.video-card > h3 { padding: var(--s2) var(--s2) 0; }

.video-card__body > h3,
.video-card__body > .video-card__title { padding: 0; }

.video-card time,
.video-card__duration {
  display: block;
  margin-top: auto;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
}

.video-card > a > time,
.video-card__link > .video-card__duration,
.video-card > time,
.video-card > .video-card__duration { padding: 0 var(--s2) var(--s2); }

.video-card__body > time,
.video-card__body > .video-card__duration { padding: 0; }

.teaching-materials { padding-top: var(--s4); }

.compact-section p {
  max-width: var(--measure);
  margin-top: var(--s2);
  color: var(--ink-2);
}

/* ===========================================================================
   PREPARATION TUTORIAL
   A persistent chapter rail and a sequence of visual learning panels turn the
   reference material into a navigable tutorial without a JavaScript runtime.
   ========================================================================== */
.preparation-page .preparation-head {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(15rem, 0.65fr);
  gap: var(--s5);
  max-width: none;
}

.preparation-page .preparation-head .event { max-width: var(--measure); }
.preparation-page .preparation-head .facts { margin-top: var(--s2); }

.preparation-page .tutorial-shell {
  display: grid;
  grid-template-columns: minmax(11rem, 13rem) minmax(0, 1fr);
  align-items: start;
  gap: var(--s5);
  margin-top: var(--s5);
}

.preparation-page .tutorial-sidebar {
  position: sticky;
  top: var(--s3);
  max-height: calc(100vh - var(--s6));
  padding-right: var(--s2);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--rule-mid) transparent;
}

.preparation-page .tutorial-nav__title {
  font-size: var(--text-title);
  font-weight: 600;
}

.preparation-page .tutorial-nav__group {
  margin-top: var(--s3);
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.preparation-page .tutorial-nav ol {
  margin-top: var(--s1);
  padding: 0;
  list-style: none;
}

.preparation-page .tutorial-nav li + li { margin-top: 0.15rem; }

.preparation-page .tutorial-nav a {
  --tutorial-link-label: var(--ink-3);
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: var(--s1);
  padding: 0.3rem var(--s1);
  border-radius: var(--radius);
  color: var(--ink-2);
  font-size: var(--text-md);
  line-height: 1.35;
  text-decoration: none;
}

.preparation-page .tutorial-nav a span {
  color: var(--tutorial-link-label);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.preparation-page .tutorial-nav a:hover,
.preparation-page .tutorial-nav a:focus-visible {
  background: var(--tint);
  color: var(--ink);
}

/* :target keeps the active chapter visible without introducing runtime state. */
.preparation-page:has(#goals:target) .tutorial-nav a[href="#goals"],
.preparation-page:has(#paths:target) .tutorial-nav a[href="#goals"],
.preparation-page:has(#requirements:target) .tutorial-nav a[href="#requirements"],
.preparation-page:has(#assistant:target) .tutorial-nav a[href="#requirements"],
.preparation-page:has(#local-workspace:target) .tutorial-nav a[href="#vscode"],
.preparation-page:has(#vscode:target) .tutorial-nav a[href="#vscode"],
.preparation-page:has(#terminal:target) .tutorial-nav a[href="#terminal"],
.preparation-page:has(#python:target) .tutorial-nav a[href="#python"],
.preparation-page:has(#server:target) .tutorial-nav a[href="#server"],
.preparation-page:has(#local-check:target) .tutorial-nav a[href="#local-check"],
.preparation-page:has(#harnesses:target) .tutorial-nav a[href="#harnesses"],
.preparation-page:has(#tutorials:target) .tutorial-nav a[href="#claude-code"],
.preparation-page:has(#claude-code:target) .tutorial-nav a[href="#claude-code"],
.preparation-page:has(#codex:target) .tutorial-nav a[href="#codex"],
.preparation-page:has(#pi:target) .tutorial-nav a[href="#pi"],
.preparation-page:has(#git:target) .tutorial-nav a[href="#git"],
.preparation-page:has(#check:target) .tutorial-nav a[href="#check"],
.preparation-page:has(#trouble:target) .tutorial-nav a[href="#trouble"],
.preparation-page:has(#goal:target) .tutorial-nav a[href="#goal"],
.preparation-page:has(#prerequisites:target) .tutorial-nav a[href="#prerequisites"],
.preparation-page:has(#workspace:target) .tutorial-nav a[href="#workspace"],
.preparation-page:has(#permissions:target) .tutorial-nav a[href="#permissions"],
.preparation-page:has(#first-check:target) .tutorial-nav a[href="#first-check"],
.preparation-page:has(#system:target) .tutorial-nav a[href="#system"],
.preparation-page:has(#install:target) .tutorial-nav a[href="#install"],
.preparation-page:has(#first-task:target) .tutorial-nav a[href="#first-task"],
.preparation-page:has(#modes:target) .tutorial-nav a[href="#modes"],
.preparation-page:has(#instructions:target) .tutorial-nav a[href="#instructions"],
.preparation-page:has(#context:target) .tutorial-nav a[href="#context"],
.preparation-page:has(#screenshots:target) .tutorial-nav a[href="#screenshots"],
.preparation-page:has(#extensions:target) .tutorial-nav a[href="#extensions"],
.preparation-page:has(#mcp:target) .tutorial-nav a[href="#mcp"],
.preparation-page:has(#skills:target) .tutorial-nav a[href="#skills"],
.preparation-page:has(#plugins:target) .tutorial-nav a[href="#plugins"],
.preparation-page:has(#subagents:target) .tutorial-nav a[href="#subagents"],
.preparation-page:has(#parallel-sessions:target) .tutorial-nav a[href="#parallel-sessions"],
.preparation-page:has(#remote-control:target) .tutorial-nav a[href="#remote-control"],
.preparation-page:has(#deepen:target) .tutorial-nav a[href="#deepen"] {
  --tutorial-link-label: var(--accent);
  background: var(--tint);
  box-shadow: inset 0.2rem 0 0 var(--accent);
  color: var(--ink);
}

.preparation-page .tutorial-sequence {
  min-width: 0;
  border-top: 1px solid var(--rule);
}

.preparation-page .anchor-alias {
  display: block;
  width: 0;
  height: 0;
  scroll-margin-top: var(--s4);
}

.preparation-page .tutorial-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  align-items: start;
  gap: var(--s4);
  min-height: clamp(34rem, 62vh, 40rem);
  padding-block: var(--s5);
  border-bottom: 1px solid var(--rule);
  scroll-margin-top: var(--s3);
}

.preparation-page .tutorial-panel:target { border-bottom-color: var(--accent); }

.preparation-page .tutorial-copy { min-width: 0; }

.preparation-page .tutorial-copy h2 {
  margin-top: var(--s1);
  font-size: var(--text-section);
}

.preparation-page .tutorial-copy h3 {
  margin-top: 0;
  font-size: var(--text-title);
}

.preparation-page .definition {
  max-width: var(--measure);
  margin-top: var(--s2);
  color: var(--ink-2);
  font-size: var(--text-lede);
  line-height: 1.5;
}

.preparation-page .goal-list,
.preparation-page .result-list {
  margin-top: var(--s3);
  padding-left: 1.5em;
  color: var(--ink-2);
}

.preparation-page .goal-list li + li,
.preparation-page .result-list li + li { margin-top: var(--s2); }

.preparation-page .goal-list li::marker,
.preparation-page .result-list li::marker {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.preparation-page .step-number,
.preparation-page .harness-kind {
  margin: 0;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-md);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.preparation-page .steps {
  max-width: none;
  margin-top: var(--s3);
}

.preparation-page .source-note,
.preparation-page .harness-access {
  color: var(--ink-3);
  font-size: var(--text-md);
}

.preparation-page .source-note {
  max-width: var(--measure);
  margin-top: var(--s3);
}

.preparation-page .checkpoint {
  max-width: var(--measure);
  margin-top: var(--s3);
  padding: var(--s2) var(--s3);
  border-left: 3px solid var(--accent);
  background: var(--tint);
  color: var(--ink-2);
}

.preparation-page .checkpoint strong { color: var(--ink); }

.preparation-page .requirement-list {
  display: grid;
  gap: var(--s2);
  margin-top: var(--s3);
}

.preparation-page .requirement-list > div {
  padding-top: var(--s2);
  border-top: 1px solid var(--rule);
}

.preparation-page .requirement-list p,
.preparation-page .setup-assistant > p {
  margin-top: var(--s1);
  color: var(--ink-2);
}

.preparation-page .setup-assistant {
  margin-top: var(--s3);
  padding: var(--s3);
  border-radius: var(--radius);
  background: var(--tint);
}

.preparation-page .download-line {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s1);
  margin-top: var(--s2);
}

.preparation-page .download-line a {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap);
  padding: 0.45em 0.85em;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-size: var(--text-lg);
  text-decoration: none;
}

.preparation-page .download-line a:hover,
.preparation-page .download-line a:focus-visible { background: var(--accent); }

.preparation-page .harness-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s2);
  margin-top: var(--s3);
}

.preparation-page .harness-grid article {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: var(--s2);
  border-radius: var(--radius);
  background: var(--tint);
}

.preparation-page .harness-grid h3 { margin-top: var(--s1); }

.preparation-page .harness-grid article > p:not(.harness-kind, .harness-access) {
  margin-top: var(--s1);
  color: var(--ink-2);
  font-size: var(--text-lg);
}

.preparation-page .harness-access { margin-top: var(--s2); }

.preparation-page .harness-grid article > a {
  align-self: flex-start;
  margin-top: auto;
  padding-top: var(--s2);
}

.preparation-page .tutorial-visual {
  display: grid;
  gap: var(--s2);
  min-width: 0;
  margin: 0;
}

.preparation-page .tutorial-visual figcaption {
  color: var(--ink-3);
  font-size: var(--text-md);
  line-height: 1.5;
}

.preparation-page .visual-frame {
  display: grid;
  align-items: center;
  min-height: 22rem;
  padding: var(--s4);
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--tint);
}

.preparation-page .visual-frame--dark {
  background: var(--ink);
  color: var(--paper);
}

.preparation-page .visual-frame--path { align-items: stretch; }

.preparation-page .path-node {
  position: relative;
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  grid-template-rows: auto auto;
  align-content: center;
  gap: 0 var(--s2);
  min-height: 5.25rem;
  padding: var(--s2) var(--s3);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--white);
}

.preparation-page .path-node + .path-node { margin-top: var(--s3); }

.preparation-page .path-node + .path-node::before {
  position: absolute;
  bottom: 100%;
  left: calc(var(--s3) + 1.2rem);
  width: 1px;
  height: var(--s3);
  background: var(--accent);
  content: "";
}

.preparation-page .path-node > span {
  grid-row: 1 / -1;
  align-self: center;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: var(--text-md);
}

.preparation-page .path-node small,
.preparation-page .tool-stack small,
.preparation-page .history-visual small {
  color: var(--ink-3);
  font-size: var(--text-md);
}

.preparation-page .tool-stack {
  display: grid;
  gap: var(--s2);
  width: 100%;
}

.preparation-page .tool-stack > div {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr) auto;
  align-items: baseline;
  gap: var(--s2);
  padding: var(--s2) var(--s3);
  border-left: 3px solid var(--accent);
  background: var(--white);
}

.preparation-page .tool-stack span {
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.preparation-page .mock-window {
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--rule-mid);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow-float);
}

.preparation-page .mock-window__bar {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  align-items: center;
  min-height: 2.25rem;
  padding-inline: var(--s2);
  border-bottom: 1px solid var(--rule);
  background: var(--tint);
}

.preparation-page .mock-window__controls {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--rule-mid);
  box-shadow: 0.9rem 0 var(--rule-mid), 1.8rem 0 var(--rule-mid);
}

.preparation-page .mock-window__title {
  justify-self: end;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.preparation-page .mock-workspace {
  display: grid;
  grid-template-columns: minmax(7.5rem, 0.36fr) minmax(0, 0.64fr);
  grid-template-rows: minmax(10rem, 1fr) auto;
  min-height: 18rem;
}

.preparation-page .mock-files {
  grid-row: 1 / -1;
  display: grid;
  align-content: start;
  gap: var(--s1);
  padding: var(--s2);
  border-right: 1px solid var(--rule);
  background: var(--tint);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.preparation-page .mock-file { padding-left: var(--s2); color: var(--accent); }

.preparation-page .mock-editor {
  padding: var(--s2) var(--s3);
  font-family: var(--font-mono);
  font-size: var(--text-md);
}

.preparation-page .mock-editor > span { color: var(--ink-3); font-size: var(--text-xs); }
.preparation-page .mock-editor p { margin-top: var(--s3); }

.preparation-page .mock-terminal {
  min-width: 0;
  padding: var(--s2);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  overflow-wrap: anywhere;
}

.preparation-page .mock-window--terminal { background: var(--ink); }

.preparation-page .mock-window--terminal pre {
  min-height: 16rem;
  margin: 0;
  padding: var(--s3);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: var(--text-md);
  line-height: 1.8;
  white-space: pre-wrap;
}

.preparation-page .mock-address {
  margin: var(--s2);
  padding: var(--s1) var(--s2);
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.preparation-page .mock-site {
  display: grid;
  place-items: center;
  align-content: center;
  gap: var(--s2);
  min-height: 14rem;
  padding: var(--s3);
  text-align: center;
}

.preparation-page .mock-site small {
  color: var(--accent);
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
}

.preparation-page .mock-site strong { font-size: var(--text-lede); }

.preparation-page .mock-site span {
  padding: 0.45em 0.9em;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-size: var(--text-md);
}

.preparation-page .system-map {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s2);
}

.preparation-page .system-map span {
  padding: var(--s3) var(--s2);
  border: 1px solid var(--ink-3);
  border-radius: var(--radius);
  text-align: center;
}

.preparation-page .harness-map {
  display: grid;
  justify-items: center;
  gap: var(--s3);
  width: 100%;
}

.preparation-page .harness-map__model,
.preparation-page .harness-map__core {
  width: min(100%, 15rem);
  padding: var(--s2);
  border: 1px solid var(--rule-mid);
  border-radius: var(--radius);
  background: var(--white);
  text-align: center;
}

.preparation-page .harness-map__core {
  border-color: var(--accent);
  background: var(--ink);
  color: var(--paper);
}

.preparation-page .harness-map__targets {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s1);
  width: 100%;
}

.preparation-page .harness-map__targets span {
  padding: var(--s2);
  border: 1px solid var(--rule);
  background: var(--white);
  color: var(--ink-2);
  text-align: center;
}

.preparation-page .mock-agent {
  display: grid;
  gap: var(--s3);
  min-height: 17rem;
  padding: var(--s3);
}

.preparation-page .mock-agent > p {
  justify-self: end;
  max-width: 80%;
  padding: var(--s2);
  border-radius: var(--radius);
  background: var(--tint);
  color: var(--ink-2);
}

.preparation-page .mock-agent > div {
  display: grid;
  align-content: start;
  gap: var(--s1);
  padding: var(--s2);
  border-left: 3px solid var(--accent);
}

.preparation-page .mock-agent > div span {
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-md);
}

.preparation-page .history-visual,
.preparation-page .diagnostic-visual,
.preparation-page .status-visual {
  display: grid;
  gap: var(--s2);
  width: 100%;
}

.preparation-page .history-visual > div {
  position: relative;
  display: grid;
  grid-template-columns: 1.5rem minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: 0 var(--s2);
  padding: var(--s2);
}

.preparation-page .history-visual > div > span {
  grid-row: 1 / -1;
  align-self: center;
  width: 0.75rem;
  height: 0.75rem;
  border: 2px solid var(--accent);
  border-radius: 50%;
  background: var(--white);
}

.preparation-page .history-visual > div + div::before {
  position: absolute;
  bottom: 100%;
  left: calc(var(--s2) + 0.35rem);
  width: 2px;
  height: var(--s2);
  background: var(--accent);
  content: "";
}

.preparation-page .status-visual span {
  display: flex;
  justify-content: space-between;
  gap: var(--s2);
  padding: var(--s2) 0;
  border-bottom: 1px solid var(--ink-3);
}

.preparation-page .status-visual strong { color: var(--paper); }

.preparation-page .diagnostic-visual > div {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  align-items: center;
  gap: var(--s2);
  padding: var(--s2);
  border: 1px solid var(--rule);
  background: var(--white);
}

.preparation-page .diagnostic-visual span {
  color: var(--accent);
  font-family: var(--font-mono);
}

/* ==========================================================================
   ABOUT PAGE
   A single reading column keeps the project account calm and scannable. The
   metadata remains part of the article flow rather than becoming a card.
   ========================================================================== */
.about-article {
  width: min(100% - 2 * var(--s3), var(--measure));
  padding-block: var(--s5) 0;
}

.about-article > h1 { font-size: var(--text-page); }

.about-article > .lead,
.about-article > .lede,
.about-article > .about-lead {
  margin-top: var(--s3);
  color: var(--ink-2);
  font-size: var(--text-lede);
  line-height: 1.55;
}

.about-article > section { margin-top: var(--s5); }
.about-article > section h2 { font-size: var(--text-section); }

.about-article > section p,
.about-article > section ul,
.about-article > section ol { margin-top: var(--s2); }

.about-article > section p,
.about-article > section li { color: var(--ink-2); }

.about-article > section ul,
.about-article > section ol { padding-left: 1.25em; }

.about-article .about-meta {
  display: grid;
  grid-template-columns: minmax(7rem, 0.32fr) minmax(0, 1fr);
  gap: var(--s1) var(--s3);
  margin: var(--s4) 0 0;
  padding-top: var(--s3);
  border-top: 1px solid var(--rule);
}

.about-article .about-meta dt {
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
}

.about-article .about-meta dd {
  min-width: 0;
  margin: 0;
  color: var(--ink-2);
  overflow-wrap: anywhere;
}

/* ==========================================================================
   FOOTER
   Three top-aligned groups: publisher identity, the one-sentence method
   provenance and a compact navigation on a quiet, bounded surface.
   ========================================================================== */
.site-foot {
  margin-top: var(--s5);
  padding-block: var(--s4);
  border-top: 1px solid var(--rule);
  background: var(--tint);
}

.site-foot > .wrap {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1fr) minmax(0, 1.2fr);
  align-items: start;
  gap: var(--s4) var(--s5);
}

.foot-publisher {
  display: flex;
  align-items: flex-start;
  gap: var(--s3);
  min-width: 0;
}
.foot-publisher img {
  flex: none;
  width: clamp(72px, 7vw, 80px);
  height: auto;
}

.imprint {
  min-width: 0;
  color: var(--ink-3);
  font-size: var(--text-lg);
  line-height: 1.5;
  overflow-wrap: anywhere;
}
.imprint .name { color: var(--ink); font-weight: 500; }
.imprint .contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}
.imprint .sep { padding-inline: 0.4em; color: var(--rule-mid); }

.foot-provenance {
  max-width: 40ch;
  min-width: 0;
  color: var(--ink-3);
  font-size: var(--text-body);
  line-height: 1.5;
}

.foot-nav { min-width: 0; }
.foot-nav-label {
  margin-bottom: var(--s1);
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.foot-nav ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.1rem var(--s2);
  margin: 0;
  padding: 0;
  min-width: 0;
  font-size: var(--text-lg);
  line-height: 1.4;
  list-style: none;
}
.foot-nav li { min-width: 0; }
.foot-nav a {
  display: inline-flex;
  align-items: center;
}

.repo-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
}
.repo-link::before {
  flex: none;
  width: 1em;
  height: 1em;
  background: url("github-mark.svg") center / contain no-repeat;
  content: "";
}

/* ==========================================================================
   MODULE HUBS AND LEARNING ROUTES
   Module 00 and the five subject hubs share a compact document component.
   ========================================================================== */
.module-hub.m1,
.module-nav .m1,
.parent-module-link.m1,
.skill-module.m1 { --module-color: var(--m1); --module-icon: url("modules/01-understanding-llms.svg"); }
.module-hub.m2,
.module-nav .m2,
.parent-module-link.m2,
.skill-module.m2 { --module-color: var(--m2); --module-icon: url("modules/02-prompt-engineering.svg"); }
.module-hub.m3,
.module-nav .m3,
.parent-module-link.m3,
.skill-module.m3 { --module-color: var(--m3); --module-icon: url("modules/03-knowledge-context-engineering.svg"); }
.module-hub.m4,
.module-nav .m4,
.parent-module-link.m4,
.skill-module.m4 { --module-color: var(--m4); --module-icon: url("modules/04-agentic-engineering.svg"); }
.module-hub.m5,
.module-nav .m5,
.parent-module-link.m5,
.skill-module.m5 { --module-color: var(--m5); --module-icon: url("modules/05-critical-perspectives-governance.svg"); }
.module-nav li:nth-child(2) { --module-color: var(--m1); }
.module-nav li:nth-child(3) { --module-color: var(--m2); }
.module-nav li:nth-child(4) { --module-color: var(--m3); }
.module-nav li:nth-child(5) { --module-color: var(--m4); }
.module-nav li:nth-child(6) { --module-color: var(--m5); }

.module-nav {
  max-width: var(--wrap);
  margin: var(--s3) auto var(--s5);
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--rule-mid) transparent;
}

.module-nav ol {
  display: grid;
  grid-template-columns: repeat(6, minmax(7.5rem, 1fr));
  min-width: 54rem;
  margin: 0;
  padding: 0;
  border-block: 1px solid var(--rule);
  list-style: none;
}

.module-nav li + li { border-left: 1px solid var(--rule); }

.module-nav a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: var(--s1);
  min-height: var(--tap);
  padding: var(--s2);
  color: var(--ink-2);
  font-size: var(--text-sm);
  line-height: 1.25;
  text-decoration: none;
}

.module-nav a span {
  color: var(--module-color, var(--ink-3));
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
}

.module-nav a:hover,
.module-nav a:focus-visible,
.module-nav a[aria-current="page"] {
  background: var(--tint);
  color: var(--ink);
}

.module-nav a[aria-current="page"] {
  box-shadow: inset 0 -0.2rem 0 var(--module-color, var(--ink-3));
}

.module-hub__head {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr);
  align-items: start;
  gap: var(--s4);
  padding-block: var(--s5) var(--s4);
  border-bottom: 1px solid var(--rule);
}

.module-hub__mark {
  display: grid;
  justify-items: center;
  gap: var(--s1);
  color: var(--module-color, var(--ink-3));
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.module-hub__icon {
  display: block;
  width: 3rem;
  height: 3rem;
  background: var(--module-color, var(--ink-3));
  -webkit-mask: var(--module-icon) center / contain no-repeat;
  mask: var(--module-icon) center / contain no-repeat;
}
.module-hub__intro,
.module-hub__head > div { min-width: 0; }
.module-hub__head h1 { max-width: 26ch; text-wrap: balance; }
.module-hub__definition,
.module-hub__question,
.module-hub__head .event { max-width: var(--measure); margin-top: var(--s2); }
.module-hub__definition,
.module-hub__head .event { color: var(--ink-2); font-size: var(--text-lede); line-height: 1.5; }

.module-hub > .wrap > section,
.module-hub > .wrap > aside,
.module-hub > section,
.module-hub > aside {
  padding-block: var(--s5);
  border-top: 1px solid var(--rule);
}

.module-hub > .wrap > section:first-of-type,
.module-hub > section:first-of-type { border-top: 0; }
.module-hub section > h2 { max-width: var(--measure); font-size: var(--text-section); }
.module-hub section > h2 + p,
.module-hub section > p { max-width: var(--measure); margin-top: var(--s2); color: var(--ink-2); }
.module-hub section > h3 { margin-top: var(--s4); font-size: var(--text-title); }
.hub-outcomes { max-width: var(--measure); margin-top: var(--s3); padding-left: 1.3em; }
.hub-outcomes li + li { margin-top: var(--s1); }

.concept-map,
.concept-map ol {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: var(--s2);
  margin-top: var(--s3);
  padding: 0;
  list-style: none;
}

.concept-map > li,
.concept-map ol > li {
  position: relative;
  min-width: 0;
  padding: var(--s3);
  border: 1px solid var(--rule);
  border-top: 0.2rem solid var(--module-color, var(--rule-mid));
  background: var(--paper);
}

.concept-map strong,
.concept-map span {
  display: block;
  overflow-wrap: anywhere;
}
.concept-map span { margin-top: var(--s1); color: var(--ink-2); font-size: var(--text-sm); }

.learning-sequence {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s2);
  margin-top: var(--s3);
}

.learning-shell { min-width: 0; }
.learning-nav { min-width: 0; }
.learning-copy { min-width: 0; }

.learning-panel {
  min-width: 0;
  min-height: 0;
  padding: var(--s3);
  border: 1px solid var(--rule);
  background: var(--white);
}

.learning-panel .learning-visual {
  display: flex;
  align-items: center;
  gap: var(--s1);
  color: var(--module-color, var(--ink-3));
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.learning-panel .learning-copy h3,
.learning-panel > h3 { margin-top: var(--s2); font-size: var(--text-card); line-height: 1.3; }
.learning-panel p { margin-top: var(--s2); color: var(--ink-2); }

.route-list,
.material-links,
.hub-video-list,
.hub-videos,
.hub-workshop-list,
.hub-workshops,
.skills-list {
  display: grid;
  gap: var(--s2);
  margin-top: var(--s3);
  padding: 0;
  list-style: none;
}

.route-list > li,
.material-links > li,
.hub-video-list > li,
.hub-videos > li,
.hub-workshop-list > li,
.hub-workshops > li {
  min-width: 0;
  padding: var(--s2) var(--s3);
  border: 1px solid var(--rule);
  background: var(--paper);
}

.route-list h3 { font-size: var(--text-card); }
.route-list h3 + p,
.route-list .route-status,
.route-list .eyebrow { margin-top: var(--s1); }
.route-item--pending { background: var(--tint) !important; color: var(--ink-3); }
.route-status,
.hub-source-inline {
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
}

.material-links > li,
.hub-video-list > li,
.hub-videos > li,
.hub-workshop-list > li,
.hub-workshops > li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--s1) var(--s3);
}

.material-links span,
.hub-video-list span,
.hub-video-list time,
.hub-videos span,
.hub-workshop-list span,
.hub-workshops span { color: var(--ink-3); font-size: var(--text-sm); }

.skills-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.skill-entry { min-width: 0; padding: var(--s3); border: 1px solid var(--rule); background: var(--paper); }
.skill-entry h4 { font-size: var(--text-card); overflow-wrap: anywhere; }
.skill-entry > p { margin-top: var(--s1); color: var(--ink-2); overflow-wrap: anywhere; }
.skill-entry dl { min-width: 0; margin-top: var(--s2); }
.skill-entry dl > div { display: grid; grid-template-columns: 6.5rem minmax(0, 1fr); gap: var(--s1); padding-block: 0.35rem; border-top: 1px solid var(--rule); }
.skill-entry dt { color: var(--ink-3); font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase; }
.skill-entry dt,
.skill-entry dd { min-width: 0; margin: 0; overflow-wrap: anywhere; }
.skill-entry__foot { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: var(--s2); margin-top: var(--s3); }
.skill-relations { display: flex; flex-wrap: wrap; gap: var(--s1); }
.skill-module { display: inline-flex; align-items: center; gap: 0.25rem; min-height: var(--tap-compact); color: var(--ink-2); font-family: var(--font-mono); font-size: var(--text-xs); text-decoration: none; }
.skill-module .module-icon { width: 1rem; height: 1rem; background: var(--module-color); -webkit-mask: var(--module-icon) center / contain no-repeat; mask: var(--module-icon) center / contain no-repeat; }

.hub-source-note,
.module-hub .source-note { max-width: var(--measure); color: var(--ink-3); }
.hub-continue {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s2);
  margin-block: var(--s5);
  padding-top: var(--s3);
  border-top: 1px solid var(--rule);
}
.hub-continue a { display: flex; align-items: center; min-height: var(--tap); padding: var(--s2); border: 1px solid var(--rule); }
.hub-continue a:nth-child(2) { justify-content: center; text-align: center; }
.hub-continue a:last-child { justify-content: flex-end; text-align: right; }

.parent-module-link {
  display: inline-flex;
  align-items: center;
  gap: var(--s1);
  min-height: var(--tap);
  margin-top: var(--s2);
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}
.parent-module-link .module-icon { width: 1.5rem; height: 1.5rem; background: var(--module-color); -webkit-mask: var(--module-icon) center / contain no-repeat; mask: var(--module-icon) center / contain no-repeat; }

.module-kicker { display: flex; align-items: center; gap: var(--s2); color: var(--ink-3); font-family: var(--font-mono); font-size: var(--text-sm); }
.module-kicker img { width: 2.5rem; height: 2.5rem; }
.module-question { max-width: var(--measure); margin-top: var(--s2); color: var(--ink-2); }
.module00-routes { max-width: var(--measure); margin-top: var(--s3); padding: var(--s3); border: 1px solid var(--rule); background: var(--tint); }
.module00-routes h3 { font-size: var(--text-card); }
.module00-routes ul { margin-top: var(--s2); padding-left: 1.25em; }
.module00-routes li + li { margin-top: var(--s1); }

.learning-route-groups { display: grid; gap: var(--s4); margin-top: var(--s4); }
.learning-route-group { display: grid; grid-template-columns: minmax(9rem, 0.24fr) minmax(0, 1fr); gap: var(--s3); align-items: start; }
.learning-route-group > h3 { padding-top: var(--s3); color: var(--ink-3); font-family: var(--font-mono); font-size: var(--text-sm); letter-spacing: 0.06em; text-transform: uppercase; }
.learning-route-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--s2); }
.learning-route-group:first-child .learning-route-list,
.learning-route-group:last-child .learning-route-list { grid-template-columns: minmax(0, 1fr); }
.learning-route-group:first-child .deep-dive-card,
.learning-route-group:last-child .deep-dive-card { max-width: var(--measure-wide); }
.deep-dive-card { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: var(--s2); }
.deep-dive-card:not(:has(.route-icon)) { grid-template-columns: minmax(0, 1fr); }
.route-icon { width: 2.5rem; height: 2.5rem; }
.deep-dive-card h4 { margin-top: var(--s1); font-size: var(--text-card); line-height: 1.25; }
.deep-dive-card h4 + p { margin-top: var(--s2); color: var(--ink-2); }

.video-module__hub-link { margin: 0; padding: 0 var(--s3) var(--s2) calc(var(--s3) + 2rem); font-size: var(--text-sm); }

/* Tutorial panels remain compact and content-driven at every viewport. */
.preparation-page .tutorial-panel { min-height: 0; }


/* ==========================================================================
   NARROW VIEWPORTS AND PREFERENCES
   ========================================================================== */
@media (max-width: 1180px) {
  .resource-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 1020px) {
  .site-head > .wrap { align-items: flex-start; }
  .site-identity { flex-basis: 100%; max-width: 38rem; }
  .head-tools { width: 100%; justify-content: space-between; }
  .site-foot > .wrap { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .foot-nav { grid-column: 1 / -1; }
  .web-module__sequence { display: block; }
  .web-module__nav {
    z-index: var(--z-sticky);
    top: 0;
    padding: var(--s1) 0;
    overflow-x: auto;
    overflow-y: hidden;
    border-left: 0;
    border-bottom: 1px solid var(--rule);
    background: var(--paper);
  }
  .web-module__nav > p { display: none; }
  .web-module__nav ol {
    display: flex;
    width: max-content;
    margin: 0;
  }
  .web-module__nav a {
    grid-template-columns: auto auto;
    padding-inline: var(--s2);
    white-space: nowrap;
  }
  .web-module__units { margin-top: var(--s4); }
  .web-module__unit { scroll-margin-top: var(--s6); }
  .preparation-page .tutorial-shell {
    display: block;
    margin-top: var(--s4);
  }
  .preparation-page .tutorial-sidebar {
    z-index: var(--z-sticky);
    top: 0;
    max-height: none;
    padding-block: var(--s1);
    padding-right: 0;
    overflow-x: auto;
    overflow-y: hidden;
    border-bottom: 1px solid var(--rule);
    background: var(--paper);
  }
  .preparation-page .tutorial-nav {
    display: flex;
    width: max-content;
  }
  .preparation-page .tutorial-nav__title,
  .preparation-page .tutorial-nav__group { display: none; }
  .preparation-page .tutorial-nav ol {
    display: flex;
    margin: 0;
  }
  .preparation-page .tutorial-nav li + li { margin-top: 0; }
  .preparation-page .tutorial-nav a {
    grid-template-columns: auto auto;
    padding: var(--s1) var(--s2);
    white-space: nowrap;
  }
  .preparation-page .tutorial-panel,
  .preparation-page .anchor-alias { scroll-margin-top: var(--s6); }
}

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; gap: var(--s4); }
  .video-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  /* The cover moves above the panel, keeping its proportion. */
  .card { grid-template-columns: 1fr; }
  .card-cover {
    border-radius: calc(var(--radius) - 1px) calc(var(--radius) - 1px) 0 0;
  }
  .workshop-timeline {
    --timeline-axis: 0.5rem;
    padding-left: 2rem;
  }
  .timeline-item { grid-template-columns: 1fr; row-gap: var(--s1); }
  .timeline-item::before { left: -1.5rem; }
  .timeline-date { text-align: left; }
  .timeline-date time {
    flex-flow: row wrap;
    align-items: baseline;
    justify-content: flex-start;
    gap: 0.45em;
  }
  .timeline-date-detail { margin-top: 0.15em; }
  .preparation-page .preparation-head { grid-template-columns: 1fr; gap: var(--s3); }
}

@media (max-width: 780px) {
  .resource-grid { grid-template-columns: minmax(0, 1fr); }
  .web-module__unit { grid-template-columns: minmax(0, 1fr); }
  .web-module__unit-head { grid-column: auto; }
  .module-hub__head { grid-template-columns: minmax(0, 1fr); gap: var(--s2); }
  .module-hub__mark { grid-template-columns: auto auto; justify-content: start; align-items: center; }
  .learning-sequence,
  .skills-list { grid-template-columns: minmax(0, 1fr); }
  .preparation-page .tutorial-panel {
    grid-template-columns: 1fr;
    gap: var(--s4);
    min-height: 0;
    padding-block: var(--s5);
  }
  .preparation-page .visual-frame { min-height: 18rem; }
}

@media (max-width: 860px), (hover: none) {
  .term-trigger { touch-action: manipulation; }
  .term-tooltip {
    position: fixed;
    inset: auto var(--s2) var(--s2);
    width: auto;
    max-height: calc(100vh - 2 * var(--s2));
    max-height: calc(100dvh - 2 * var(--s2));
    overflow-y: auto;
    overflow-wrap: anywhere;
  }
  .module-series .module-series__item .module-series__link[data-tooltip]::after {
    position: fixed;
    inset: auto var(--s2) var(--s2);
    width: auto;
    max-width: none;
    transform: none;
  }
}

@media (max-width: 860px) {
  .deep-dives .section-head,
  .deep-dive-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .learning-route-group { grid-template-columns: minmax(0, 1fr); gap: var(--s1); }
  .learning-route-group > h3 { padding-top: 0; }
  .learning-route-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .deep-dives .section-lede {
    grid-column: 1 / -1;
  }

  .site-foot > .wrap {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--s3);
  }
  .foot-provenance { max-width: var(--measure); }
}

@media (max-width: 640px) {
  .deep-dives .section-head,
  .deep-dive-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .deep-dives .section-lede {
    grid-column: auto;
  }

  .learning-route-list { grid-template-columns: minmax(0, 1fr); }
  .hub-continue { grid-template-columns: minmax(0, 1fr); }
  .hub-continue a,
  .hub-continue a:nth-child(2),
  .hub-continue a:last-child { justify-content: flex-start; text-align: left; }
  .skill-entry dl > div { grid-template-columns: minmax(0, 1fr); gap: 0.15rem; }

  .site-head > .wrap,
  .head-tools { align-items: flex-start; }
  .head-tools { width: 100%; justify-content: space-between; }
  .site-nav ul { gap: var(--s2); }
  .overview-grid,
  .references { grid-template-columns: 1fr; }
  .overview-grid article:first-child { grid-column: auto; }
  .foot-nav ul { grid-template-columns: minmax(0, 1fr); }
  .media-frame.reader { min-height: 460px; }
  .resource-card { padding: var(--s2); }
  .resource-summary { grid-template-columns: 4.5rem minmax(0, 1fr); }
  .resource-action { padding-inline: 0.5em; }
  .module-series__label { flex-basis: 100%; }
  .video-module__summary { padding-inline: var(--s2); }
  .video-grid {
    grid-template-columns: minmax(0, 1fr);
    padding: var(--s2);
  }
  .card-meta > div { grid-template-columns: 1fr; gap: 0.15em; }
  .preparation-page .harness-grid { grid-template-columns: 1fr; }
  .preparation-page .visual-frame { padding: var(--s2); }
  .preparation-page .tool-stack > div {
    grid-template-columns: 2rem minmax(0, 1fr);
    gap: 0 var(--s1);
  }
  .preparation-page .tool-stack small { grid-column: 2; }
  .preparation-page .mock-workspace {
    grid-template-columns: minmax(6rem, 0.34fr) minmax(0, 0.66fr);
  }
  .preparation-page .mock-window--terminal pre { font-size: var(--text-sm); }
  .about-article .about-meta { grid-template-columns: minmax(0, 1fr); }
  .about-article .about-meta dd + dt { margin-top: var(--s1); }
}

@media (pointer: coarse) {
  .site-identity-logo,
  .site-identity-title,
  .site-nav a,
  .language-nav a,
  .foot-nav a,
  .imprint .contact a,
  .resource-card h3 a,
  .resource-action,
  .module-series__link,
  .module-list li > a,
  .module-nav a,
  .parent-module-link,
  .hub-continue a,
  .skill-module,
  .learning-route-list a,
  .preparation-page .tutorial-nav a,
  .preparation-page .download-line a {
    min-height: var(--tap);
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: 0.01ms !important; }
}