@charset "UTF-8";

:root {
  --ink: #24221e;
  --ink-soft: #5b554d;
  --paper: #f7f1e6;
  --paper-deep: #eee5d6;
  --orange: #E77500;
  --orange-ink: #963f00;
  --line: #cfc3b2;
  --white: #fffaf1;
  --max-width: 1180px;
  --serif: Georgia, "Times New Roman", Times, serif;
  --sans: Arial, Helvetica, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--serif);
  font-size: 1rem;
  line-height: 1.55;
}
a { color: inherit; }
.page-width { width: min(calc(100% - 6rem), var(--max-width)); margin-inline: auto; }

.skip-link {
  position: absolute;
  z-index: 10;
  top: -4rem;
  left: 1rem;
  padding: .65rem .9rem;
  color: var(--white);
  background: var(--ink);
  font-family: var(--sans);
  font-size: .8rem;
  text-decoration: none;
}
.skip-link:focus { top: 1rem; }

.orange-rule { height: 5px; background: var(--orange); }
.masthead { border-bottom: 1px solid var(--line); }
.masthead-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 5.25rem;
  gap: 2rem;
}
.institution {
  display: inline-flex;
  align-items: center;
  gap: .9rem;
  color: var(--ink);
  font-family: var(--sans);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .11em;
  text-decoration: none;
  text-transform: uppercase;
}
.institution-rule { width: 2.2rem; height: 1px; background: var(--orange); }
.course-mark { color: var(--orange-ink); }
.nav-list {
  display: flex;
  gap: 1.6rem;
  margin: 0;
  padding: 0;
  color: var(--ink-soft);
  font-family: var(--sans);
  font-size: .71rem;
  letter-spacing: .08em;
  list-style: none;
  text-transform: uppercase;
}
.nav-list a { text-decoration: none; }
.nav-list a:hover, .nav-list a:focus-visible { color: var(--orange-ink); }

.sponsor-strip {
  border-bottom: 1px solid var(--line);
  background: var(--paper-deep);
  color: var(--ink-soft);
  font-family: var(--sans);
  font-size: .74rem;
  letter-spacing: .04em;
}
.sponsor-strip p { margin: 0; padding: .7rem 0; }
.sponsor-strip a { color: var(--orange-ink); text-underline-offset: .2em; }

.hero {
  display: grid;
  grid-template-columns: minmax(18rem, .72fr) minmax(0, 1.28fr);
  gap: clamp(3rem, 8vw, 8rem);
  align-items: center;
  min-height: 42rem;
  padding-top: 5.5rem;
  padding-bottom: 5.75rem;
}
.figure-label, .section-number, dt, .figure-kicker {
  margin: 0;
  font-family: var(--sans);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  font-variant-caps: all-small-caps;
}
.figure-label { color: var(--orange-ink); }
.figure-label span { color: var(--ink-soft); margin-inline: .4rem; }
h1 {
  margin: 1.25rem 0 1.4rem;
  font-size: clamp(5.4rem, 11vw, 9.8rem);
  font-weight: 400;
  letter-spacing: -.09em;
  line-height: .8;
}
h1 em { font-style: italic; }
.hero-note { margin: 0; color: var(--ink-soft); font-size: 1.15rem; }
.hero-rule { width: 4.5rem; margin: 2.1rem 0 1.4rem; border-top: 2px solid var(--orange); }
.hero-facts { margin: 0; }
.hero-facts > div { display: grid; grid-template-columns: 5.5rem 1fr; gap: .65rem; margin-top: .45rem; }
.hero-facts dt { color: var(--ink-soft); font-size: .62rem; letter-spacing: .1em; }
.hero-facts dd { margin: 0; font-size: .98rem; }

.technical-figure { min-width: 0; width: 100%; margin: 0; padding-top: 1rem; }
.figure-kicker { margin: 0 0 .75rem; color: var(--ink-soft); }
.diagram-scroll { max-width: 100%; }
.system-diagram { display: block; width: 100%; max-width: 100%; min-width: 0; height: auto; overflow: visible; background: var(--paper); }
.system-diagram text { dominant-baseline: alphabetic; }
.agent-boundary { fill: none; stroke: var(--ink); stroke-width: 1.5; stroke-dasharray: 7 5; }
.harness-frame { fill: none; stroke: var(--orange); stroke-width: 1.75; }
.boundary-label { fill: var(--ink); font-family: var(--sans); font-size: 14px; font-weight: 700; letter-spacing: 3px; }
.boundary-tick { fill: none; stroke: var(--orange); stroke-width: 2; }
.flow { fill: none; stroke-width: 2; stroke-linecap: square; }
.flow-ink { stroke: var(--ink); }
.flow-orange { stroke: var(--orange); }
.inner-link { fill: none; stroke: var(--ink-soft); stroke-width: 1.4; stroke-linecap: square; }
.node { fill: var(--paper); stroke: var(--ink); stroke-width: 1.5; }
.node-model { stroke: var(--orange); stroke-width: 2; }
.environment-node { fill: var(--paper-deep); }
.interaction { fill: none; stroke-width: 2; stroke-linecap: square; }
.interaction-action { stroke: var(--orange); }
.interaction-observation { stroke: var(--ink); }
.loop-label { font-size: 11px; }
.diagram-label, .resource-label {
  fill: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
}
.diagram-label-orange { fill: var(--orange-ink); }
.resource-label { font-size: 13px; letter-spacing: 1.5px; }
.resource-point { fill: var(--paper); stroke: var(--orange); stroke-width: 2; }
.registration { fill: none; stroke: var(--line); stroke-width: 1; }
.technical-figure figcaption {
  max-width: 48rem;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: .95rem;
  font-style: normal;
  line-height: 1.65;
}

.section-heading { display: flex; align-items: baseline; gap: 1.1rem; border-bottom: 1px solid #655f56; }
.section-number { flex: 0 0 auto; color: var(--orange-ink); }
h2 { margin: 0 0 1.1rem; font-size: clamp(2.15rem, 4vw, 3.6rem); font-weight: 400; letter-spacing: -.055em; line-height: 1; }

.schedule-section { background: var(--paper-deep); }
.schedule-layout {
  display: grid;
  grid-template-columns: minmax(14rem, .62fr) minmax(0, 1.38fr);
  gap: clamp(3rem, 8vw, 7rem);
  align-items: start;
  padding-top: 5.25rem;
  padding-bottom: 5.75rem;
}
.schedule-heading { display: block; position: sticky; top: 2rem; border: 0; }
.schedule-heading .section-number { margin-bottom: 1.1rem; }
.schedule-heading h2 { margin-bottom: 0; }
.schedule-content { min-width: 0; }
.status-label, .schedule-meta {
  font-family: var(--sans);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.schedule-list { margin: 0; padding: 0; list-style: none; }
.schedule-item {
  display: grid;
  grid-template-columns: minmax(7rem, .42fr) minmax(0, 1.58fr);
  gap: clamp(1rem, 4vw, 2.5rem);
  padding: 1.35rem 0;
  border-bottom: 1px solid var(--line);
}
.schedule-item:first-child { border-top: 1px solid var(--line); }
.schedule-meta { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .45rem .7rem; color: var(--ink-soft); }
.schedule-meta span { color: var(--orange-ink); }
.schedule-meta time { white-space: nowrap; }
.current-week-badge {
  flex-basis: 100%;
  width: max-content;
  padding: .26rem .42rem .22rem;
  color: var(--paper) !important;
  background: var(--orange-ink);
  font-size: .58rem;
  font-weight: 700;
  letter-spacing: .08em;
  line-height: 1;
  text-transform: uppercase;
}
.schedule-item h3 { margin: -.16rem 0 .35rem; font-size: clamp(1.18rem, 2vw, 1.5rem); font-weight: 400; line-height: 1.25; }
.status-label { margin: 0; color: var(--ink-soft); font-size: .62rem; letter-spacing: .1em; }
.status-label a { color: var(--orange-ink); text-underline-offset: .2em; }
.schedule-item.delivered .status-label { color: var(--orange-ink); }
.schedule-item.current { margin-inline: -.8rem; padding-inline: .8rem; border-left: 3px solid var(--orange); background: #e8dccb; }
.schedule-item.recess h3, .schedule-item.recess .schedule-meta span { color: var(--ink-soft); }
.schedule-item.recess { border-left: 3px solid var(--line); padding-left: .8rem; }

.schedule-main { min-width: 0; }
.week-readings { margin-top: .9rem; padding-top: .75rem; border-top: 1px solid var(--line); }
.week-readings summary {
  color: var(--orange-ink);
  cursor: pointer;
  font-family: var(--sans);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.week-readings summary::marker { color: var(--orange-ink); }
.reading-groups { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(15rem, 100%), 1fr)); gap: 1.35rem; margin-top: 1rem; }
.reading-groups h4 { margin: 0 0 .55rem; color: var(--ink-soft); font-family: var(--sans); font-size: .64rem; letter-spacing: .1em; text-transform: uppercase; }
.reading-groups ol, .reading-groups ul { margin: 0; padding-left: 1.15rem; }
.reading-groups li { margin: 0 0 .5rem; color: var(--ink-soft); font-size: .92rem; line-height: 1.35; }
.reading-groups li:last-child { margin-bottom: 0; }
.reading-groups a { color: var(--ink); text-decoration-color: var(--orange); text-underline-offset: .16em; }
.reading-groups a:hover, .reading-groups a:focus-visible { color: var(--orange-ink); }

.info-section { background: var(--paper); }
.info-section .page-width { padding-top: 5.25rem; padding-bottom: 5.75rem; }
.info-layout { display: grid; grid-template-columns: minmax(14rem, .62fr) minmax(0, 1.38fr); gap: clamp(3rem, 8vw, 7rem); align-items: start; }
.info-heading { display: block; position: sticky; top: 2rem; border: 0; }
.info-heading .section-number { margin-bottom: 1.1rem; }
.info-heading h2 { margin-bottom: 0; }
.info-content { min-width: 0; }
.section-intro { max-width: 44rem; margin: 0 0 2rem; color: var(--ink-soft); font-size: 1.12rem; }
.grading-section { background: var(--paper); }
.projects-section { background: var(--paper-deep); }
.grade-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.grade-card { padding: 1.5rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.grade-value { margin: 0 0 .75rem; color: var(--orange-ink); font-family: var(--sans); font-size: 2.35rem; font-weight: 700; line-height: 1; }
.grade-card h3, .project-card h3, .project-guidance h3 { margin: 0 0 .55rem; font-size: 1.3rem; font-weight: 400; }
.grade-card p:last-child, .project-card p:last-child, .project-guidance p { margin: 0; color: var(--ink-soft); font-size: .96rem; }
.bonus-note, .hypothesis-note { margin: 1rem 0 0; padding: 1rem 1.1rem; border-left: 3px solid var(--orange); color: var(--ink-soft); background: var(--paper-deep); }
.bonus-note strong, .hypothesis-note strong { color: var(--ink); }
.project-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.project-card { padding: 1.5rem; border-top: 4px solid var(--orange); background: var(--paper); }
.project-period { margin: 0 0 .75rem; color: var(--orange-ink); font-family: var(--sans); font-size: .66rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.project-guidance { margin-top: 1rem; padding: 1.5rem; border: 1px solid var(--line); background: var(--paper); }

.sponsors-section { background: var(--paper); }
.sponsor-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin: 0; padding: 0; list-style: none; }
.sponsor-card { padding: 1.5rem; border-top: 4px solid var(--orange); background: var(--paper-deep); }
.sponsor-tier { margin: 0 0 .75rem; color: var(--orange-ink); font-family: var(--sans); font-size: .66rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.sponsor-card h3 { margin: 0 0 .55rem; font-size: 1.3rem; font-weight: 400; }
.sponsor-card h3 a { text-decoration-color: var(--orange); text-underline-offset: .18em; }
.sponsor-card h3 a:hover, .sponsor-card h3 a:focus-visible { color: var(--orange-ink); }
.sponsor-card p:last-child { margin: 0; color: var(--ink-soft); font-size: .96rem; }
.sponsor-note { margin: 1rem 0 0; padding: 1rem 1.1rem; border-left: 3px solid var(--orange); color: var(--ink-soft); background: var(--paper-deep); }

.site-footer { color: var(--paper); background: var(--ink); font-family: var(--sans); font-size: .82rem; letter-spacing: .04em; }
.footer-row { display: flex; justify-content: space-between; gap: 2rem; min-height: 5.5rem; align-items: center; }
.footer-row p { margin: 0; }
:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; box-shadow: 0 0 0 6px var(--white); }

@media (max-width: 820px) {
  .page-width { width: min(calc(100% - 3rem), var(--max-width)); }
  .hero { grid-template-columns: 1fr; gap: 3.2rem; min-height: auto; padding-top: 4.5rem; padding-bottom: 4.75rem; }
  .hero-copy { max-width: 32rem; }
  .technical-figure { padding-top: 0; }
  .diagram-scroll { overflow-x: auto; overscroll-behavior-inline: contain; }
  .system-diagram { width: max(100%, 42rem); max-width: none; min-width: 42rem; }
  .schedule-layout { grid-template-columns: 1fr; gap: 2.5rem; }
  .schedule-heading { position: static; }
  .info-layout { grid-template-columns: 1fr; gap: 2.5rem; }
  .info-heading { position: static; }
  .schedule-heading h2 br { display: none; }
  .info-section .page-width { padding-top: 3.8rem; padding-bottom: 4.2rem; }
}
@media (max-width: 560px) {
  .page-width { width: min(calc(100% - 2rem), var(--max-width)); }
  .masthead-row { align-items: flex-start; flex-direction: column; gap: .9rem; padding-top: 1.2rem; padding-bottom: 1.25rem; }
  .nav-list { gap: 1rem; font-size: .64rem; }
  .institution { font-size: .65rem; }
  .institution-rule { width: 1.2rem; }
  h1 { margin-top: 1rem; font-size: clamp(5rem, 24vw, 7rem); }
  .hero { gap: 2.5rem; padding-top: 3.5rem; }
  .technical-figure { margin-inline: 0; min-width: 0; max-width: 100%; }
  .system-diagram .diagram-label { font-size: 20px; }
  .system-diagram .resource-label { font-size: 16px; }
  .system-diagram .boundary-label { font-size: 17px; }
  .technical-figure figcaption { margin-right: .5rem; }
  .nav-list { flex-wrap: wrap; row-gap: .4rem; }
  .schedule-layout { grid-template-columns: 1fr; gap: 2rem; padding-top: 3.8rem; padding-bottom: 4.2rem; }
  .schedule-heading h2 br { display: none; }
  .schedule-item { grid-template-columns: 1fr; gap: .65rem; }
  .schedule-meta { justify-content: flex-start; }
  .schedule-meta span { min-width: 4.8rem; }
  .schedule-meta .current-week-badge { min-width: 0; }
  .schedule-item.current { margin-inline: -.5rem; padding-inline: .5rem; }
  .grade-grid, .project-grid, .sponsor-grid { grid-template-columns: 1fr; }
  .footer-row { align-items: flex-start; flex-direction: column; gap: .35rem; justify-content: center; min-height: 6rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}