@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=DM+Sans:wght@400;500;600;700&family=Fraunces:opsz,wght@9..144,500;9..144,600;9..144,700&display=swap');

:root {
  color-scheme: light;
  --paper: #f5f0e5;
  --paper-deep: #ebe3d2;
  --card: #fffdf7;
  --ink: #183833;
  --ink-soft: #49615a;
  --muted: #6e7c70;
  --line: #d8d4c5;
  --teal: #286d61;
  --teal-dark: #194b44;
  --coral: #d87558;
  --gold: #d8ad50;
  --sage: #dce8d9;
  --blue-pale: #e4ece8;
  --shadow: 0 18px 44px rgba(39, 56, 44, .09);
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "DM Sans", "Trebuchet MS", sans-serif;
  --font-mono: "DM Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 6.5rem; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .23;
  background-image: radial-gradient(#a59f89 .55px, transparent .55px);
  background-size: 7px 7px;
}
a { color: var(--teal-dark); text-decoration-thickness: .08em; text-underline-offset: .2em; }
a:hover { color: #a34b35; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--coral); outline-offset: 4px; border-radius: 3px; }
::selection { background: #e6c979; color: var(--ink); }

.skip-link {
  position: fixed; top: .75rem; left: .75rem; z-index: 99;
  padding: .65rem 1rem; background: var(--ink); color: var(--card);
  transform: translateY(-160%); transition: transform .2s ease;
}
.skip-link:focus { transform: translateY(0); }
.site-header {
  position: sticky; top: 0; z-index: 20;
  border-bottom: 1px solid rgba(24,56,51,.12);
  background: rgba(245,240,229,.94);
  backdrop-filter: blur(12px);
}
.nav-shell {
  max-width: 1240px; min-height: 76px; margin: 0 auto; padding: .65rem 2rem;
  display: flex; align-items: center; justify-content: space-between; gap: 2rem;
}
.brand {
  display: inline-flex; align-items: center; gap: .72rem;
  color: var(--ink); text-decoration: none; font-weight: 700; letter-spacing: -.03em;
}
.brand-mark {
  width: 42px; height: 42px; display: grid; place-items: center;
  border-radius: 50%; background: var(--teal); color: #fff8e9;
  font-family: var(--font-display); font-size: 1.3rem; border: 2px solid var(--gold);
}
.brand-copy { display: grid; line-height: 1.12; }
.brand-copy small { margin-top: .2rem; font-size: .65rem; letter-spacing: .13em; text-transform: uppercase; color: var(--muted); }
.main-nav { display: flex; align-items: center; gap: clamp(.9rem, 2.4vw, 2rem); }
.main-nav a {
  color: var(--ink-soft); text-decoration: none; font-size: .86rem; font-weight: 600;
}
.main-nav a:hover { color: var(--coral); }
.nav-cta {
  padding: .55rem .9rem; border-radius: 999px; background: var(--ink);
  color: #fff8e9 !important;
}
.nav-cta:hover { background: var(--teal) !important; }

.wrap { width: min(1120px, calc(100% - 3rem)); margin-inline: auto; }
.eyebrow {
  display: inline-flex; align-items: center; gap: .55rem;
  color: var(--teal); font-family: var(--font-mono); font-size: .72rem;
  letter-spacing: .11em; text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: var(--coral); }
.hero {
  position: relative; overflow: hidden; min-height: 640px;
  padding: clamp(4rem, 8vw, 7.5rem) 0 5rem;
}
.hero::after {
  content: ""; position: absolute; z-index: -1; width: 680px; height: 680px;
  top: -290px; right: -190px; border: 1px solid rgba(40,109,97,.15); border-radius: 50%;
  box-shadow: 0 0 0 60px rgba(40,109,97,.025), 0 0 0 120px rgba(40,109,97,.025);
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(290px, .85fr); align-items: center; gap: 3rem; }
.hero h1 {
  max-width: 750px; margin: 1.25rem 0 1.2rem;
  font: 600 clamp(3.3rem, 7vw, 6.4rem)/.99 var(--font-display);
  letter-spacing: -.055em;
}
.hero h1 em { color: var(--teal); font-weight: 500; }
.hero-lede { max-width: 630px; margin: 0; color: var(--ink-soft); font-size: clamp(1.05rem, 1.6vw, 1.25rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
  min-height: 48px; padding: .7rem 1.1rem; border: 1px solid var(--ink);
  border-radius: 4px; background: var(--ink); color: #fff9ea;
  text-decoration: none; font-weight: 700; font-size: .9rem;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.button:hover { color: #fff9ea; background: var(--teal); border-color: var(--teal); transform: translateY(-2px); }
.button-quiet { background: transparent; color: var(--ink); }
.button-quiet:hover { color: var(--ink); background: var(--sage); border-color: var(--teal); }
.hero-note { margin-top: 1.25rem; font-size: .82rem; color: var(--muted); }
.professor-stage { position: relative; display: grid; place-items: center; min-height: 380px; }
.mascot-frame {
  position: relative; width: min(100%, 390px); padding: 1.2rem 1.2rem .95rem;
  border: 1px solid #d0c8b4; border-radius: 48% 48% 5px 5px;
  background: rgba(255,253,247,.73); box-shadow: var(--shadow);
  transform: rotate(1.5deg);
}
.mascot-image {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 44% 44% 3px 3px;
}
.mascot-caption {
  padding-top: .65rem; border-top: 1px solid var(--line); text-align: center;
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--muted);
}
.orbit-note {
  position: absolute; display: flex; gap: .55rem; align-items: center;
  padding: .62rem .8rem; border: 1px solid var(--line); border-radius: 3px;
  background: var(--card); box-shadow: 0 8px 20px rgba(39,56,44,.08);
  color: var(--ink-soft); font: .72rem var(--font-mono);
}
.orbit-note::before { content: ""; width: 9px; height: 9px; border-radius: 50%; background: var(--coral); }
.orbit-one { top: 12%; right: -4%; transform: rotate(3deg); }
.orbit-two { bottom: 13%; left: -6%; transform: rotate(-4deg); }
.hero-index {
  position: absolute; bottom: 2.1rem; right: max(1.5rem, calc((100vw - 1120px)/2));
  color: #a4a18f; font: .7rem var(--font-mono); letter-spacing: .12em;
}

.quick-strip {
  background: var(--ink); color: #f5f0e5; padding: 1.1rem 0;
}
.quick-strip .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.quick-strip p { margin: 0; font-size: .87rem; }
.quick-strip strong { color: #e9c66f; font-weight: 600; }
.quick-strip a { color: #f0d48e; white-space: nowrap; }

.section { padding: clamp(4rem, 7vw, 6.5rem) 0; }
.section-heading { max-width: 740px; margin-bottom: 2.4rem; }
.section-heading h2 {
  margin: .65rem 0 .8rem; font: 600 clamp(2.35rem, 4.8vw, 4rem)/1.04 var(--font-display);
  letter-spacing: -.045em;
}
.section-heading p { max-width: 660px; color: var(--ink-soft); margin: 0; font-size: 1.02rem; }
.section-kicker { color: var(--coral); font: .72rem var(--font-mono); letter-spacing: .12em; text-transform: uppercase; }
.paper-section { background: #fbf8ef; border-block: 1px solid rgba(24,56,51,.1); }

.concept-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; align-items: stretch; }
.concept-card {
  position: relative; padding: 1.55rem 1.5rem 1.7rem; border: 1px solid var(--line);
  background: var(--card); box-shadow: 0 6px 18px rgba(39,56,44,.035);
}
.concept-card:nth-child(2) { transform: translateY(1.2rem); background: #f0f3e9; }
.concept-card:nth-child(3) { background: #f4e9de; }
.concept-num { display: block; color: var(--coral); font: .72rem var(--font-mono); letter-spacing: .1em; }
.concept-card h3 { margin: .6rem 0 .2rem; font: 600 1.85rem var(--font-display); }
.concept-card .label { color: var(--teal); font-size: .78rem; font-weight: 700; letter-spacing: .04em; }
.concept-card p { margin: .9rem 0 0; color: var(--ink-soft); font-size: .93rem; }
.concept-card .caveat { padding-top: .85rem; border-top: 1px solid rgba(24,56,51,.13); font-size: .83rem; }
.concept-card a { display: inline-block; margin-top: 1rem; font-size: .82rem; font-weight: 700; }
.overlap-note {
  margin-top: 3rem; padding: 1.2rem 1.4rem; display: grid;
  grid-template-columns: 110px 1fr; gap: 1.2rem; align-items: center;
  border-left: 4px solid var(--gold); background: #f4efdF;
}
.overlap-mark {
  width: 88px; aspect-ratio: 1; position: relative;
  display: grid; place-items: center; font: 600 .68rem var(--font-mono); color: var(--ink);
}
.overlap-mark::before, .overlap-mark::after {
  content: ""; position: absolute; width: 50px; height: 50px; border: 1px solid var(--teal);
  border-radius: 50%;
}
.overlap-mark::before { transform: translate(-12px,-5px); }
.overlap-mark::after { transform: translate(12px,5px); border-color: var(--coral); }
.overlap-note p { margin: 0; color: var(--ink-soft); }
.overlap-note strong { color: var(--ink); }

.table-wrap { border: 1px solid var(--line); background: var(--card); overflow-x: auto; }
.comparison {
  width: 100%; border-collapse: collapse; min-width: 700px; text-align: left;
}
.comparison th, .comparison td { padding: 1rem 1.1rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.comparison thead { background: var(--ink); color: #fbf8ef; font-size: .78rem; letter-spacing: .04em; }
.comparison tbody th { width: 19%; color: var(--teal-dark); font-size: .88rem; }
.comparison td { color: var(--ink-soft); font-size: .86rem; }
.comparison tbody tr:last-child > * { border-bottom: 0; }
.table-hint { margin: .65rem 0 0; color: var(--muted); font-size: .76rem; }
.baseline {
  margin-top: 1.25rem; padding: 1.15rem 1.3rem; background: var(--sage);
  display: flex; align-items: flex-start; gap: 1rem;
}
.baseline-badge { flex: 0 0 auto; color: var(--teal); font: .72rem var(--font-mono); letter-spacing: .08em; text-transform: uppercase; }
.baseline p { margin: 0; color: var(--ink-soft); font-size: .91rem; }

.example-section { background: #e9e3d4; }
.example-header {
  padding: 1.2rem 1.4rem; display: flex; justify-content: space-between; gap: 1rem;
  align-items: center; background: var(--teal-dark); color: #fff9ea;
}
.example-header p { margin: .2rem 0 0; color: #d2e0d2; font-size: .82rem; }
.example-tag { padding: .35rem .55rem; border: 1px solid rgba(255,255,255,.35); color: #e9c66f; font: .66rem var(--font-mono); text-transform: uppercase; letter-spacing: .1em; white-space: nowrap; }
.example-sheet { background: var(--card); border: 1px solid #d3cbbc; box-shadow: var(--shadow); }
.observed-copy { padding: 1.3rem 1.5rem; border-bottom: 1px solid var(--line); }
.observed-copy blockquote {
  margin: .45rem 0 .55rem; font: 600 clamp(1.6rem, 3vw, 2.55rem)/1.08 var(--font-display);
  letter-spacing: -.025em;
}
.observed-copy cite { color: var(--muted); font: .79rem var(--font-body); font-style: normal; }
.offer-list {
  display: flex; flex-wrap: wrap; gap: .5rem; margin: 1rem 0 0; padding: 0; list-style: none;
}
.offer-list li { padding: .35rem .6rem; background: var(--blue-pale); color: var(--teal-dark); font-size: .75rem; font-weight: 600; }
.fairness-note { padding: 1rem 1.5rem; background: #fff5dd; color: #65583a; font-size: .83rem; }
.rewrite-label { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; margin: 2.1rem 0 1rem; }
.rewrite-label h3 { margin: 0; font: 600 1.7rem var(--font-display); }
.rewrite-label span { color: var(--muted); font: .7rem var(--font-mono); letter-spacing: .08em; text-transform: uppercase; }
.rewrite-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.rewrite-card {
  padding: 1.35rem 1.4rem; border: 1px solid var(--line); background: #fbf8ef;
}
.rewrite-card h4 { margin: 0 0 .8rem; color: var(--coral); font: .7rem var(--font-mono); letter-spacing: .11em; text-transform: uppercase; }
.rewrite-card p { margin: 0; color: var(--ink-soft); }
.rewrite-card strong { color: var(--ink); }
.rewrite-card .rewrite-title { display: block; margin-bottom: .55rem; color: var(--ink); font: 600 1.4rem/1.15 var(--font-display); }
.teaching-point { margin-top: 1rem; padding: 1.2rem 1.4rem; border-left: 4px solid var(--coral); background: #f8ece4; color: var(--ink-soft); }
.teaching-point p { margin: 0; }
.teaching-point strong { color: var(--ink); }

.technical-section { background: #f7f3e9; }
.build-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .8rem;
  margin: 1.4rem 0 1rem;
}
.build-stat {
  display: flex;
  min-height: 100px;
  flex-direction: column;
  justify-content: center;
  padding: 1rem;
  border: 1px solid var(--line);
  background: var(--card);
}
.build-stat strong { color: var(--teal); font: 600 1.8rem/1 var(--font-display); }
.build-stat span { margin-top: .5rem; color: var(--muted); font-size: .76rem; }
.build-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.build-card { padding: 1.3rem 1.4rem; border: 1px solid var(--line); background: var(--card); }
.build-number { color: var(--coral); font: .68rem var(--font-mono); letter-spacing: .1em; }
.build-card h3 { margin: .65rem 0 .7rem; font: 600 1.35rem/1.15 var(--font-display); }
.build-card p { margin: 0; color: var(--ink-soft); font-size: .88rem; }
.build-card p + p { margin-top: .85rem; }
.build-card a, .technical-sources a { color: var(--teal); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.build-card code { padding: .08rem .28rem; background: #eee9dc; color: var(--ink); font: .85em var(--font-mono); }
.build-lesson { padding-top: .8rem; border-top: 1px solid var(--line); }
.build-lesson strong { color: var(--ink); }
.build-caveat { margin-top: 1rem; padding: 1.25rem 1.4rem; background: var(--sage); }
.build-caveat h3 { margin: 0 0 .45rem; font: 600 1.2rem var(--font-display); }
.build-caveat p { margin: 0; color: var(--ink-soft); font-size: .86rem; }
.technical-sources { display: flex; flex-wrap: wrap; align-items: center; gap: .55rem 1rem; margin-top: 1rem; color: var(--muted); font-size: .78rem; }

.checklist-section { background: var(--teal-dark); color: #fbf8ef; }
.checklist-section .section-heading p { color: #c9d7ce; }
.checklist-section .eyebrow { color: #dfbd68; }
.checklist-layout { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(250px, .65fr); gap: 2rem; align-items: start; }
.checklist {
  margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.2);
}
.checklist li { border-bottom: 1px solid rgba(255,255,255,.2); }
.check-row {
  display: grid; grid-template-columns: 28px 1fr; gap: .9rem; align-items: start;
  padding: 1rem .15rem; cursor: pointer;
}
.check-row input {
  appearance: none; margin: .18rem 0 0; width: 22px; height: 22px; border: 1px solid #b4c2b4;
  border-radius: 3px; background: transparent; cursor: pointer; position: relative;
}
.check-row input:checked { background: #e2c46b; border-color: #e2c46b; }
.check-row input:checked::after { content: "✓"; position: absolute; inset: -2px 0 0; color: var(--ink); font-size: 1rem; font-weight: 700; text-align: center; }
.check-row input:focus-visible { outline-color: #efc35e; }
.check-copy strong { display: block; color: #fff9ea; font-size: .96rem; }
.check-copy small { display: block; margin-top: .2rem; color: #c2d2c6; font-size: .83rem; }
.check-step { margin-right: .35rem; color: #e2c46b; font: .68rem var(--font-mono); }
.progress-card {
  position: sticky; top: 100px; padding: 1.35rem; border: 1px solid rgba(255,255,255,.24);
  background: rgba(255,255,255,.06);
}
.progress-card h3 { margin: 0; font: 600 1.45rem var(--font-display); }
.progress-number { margin: 1rem 0 .4rem; font: 500 3.6rem/.95 var(--font-display); color: #e6c66e; }
.progress-track { height: 7px; margin: .8rem 0 1rem; background: rgba(255,255,255,.19); }
.progress-fill { width: 0; height: 100%; background: #e2c46b; transition: width .25s ease; }
.progress-card p { color: #c2d2c6; font-size: .82rem; }
.reset-checklist {
  padding: .55rem .75rem; border: 1px solid #b8c7b9; background: transparent;
  color: #fff9ea; cursor: pointer; font-size: .8rem; font-weight: 600;
}
.reset-checklist:hover { background: rgba(255,255,255,.1); }
.checklist-foot { margin-top: 1.5rem; color: #b9c9bc; font-size: .78rem; }
.url-review-panel {
  margin: 2rem 0 2.2rem;
  padding: 1.25rem;
  border: 1px solid rgba(255,255,255,.24);
  background: rgba(255,255,255,.055);
}
.url-scan-form label { display: block; margin-bottom: .45rem; color: #fff9ea; font-weight: 700; }
.url-scan-controls { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .65rem; }
.url-scan-controls input {
  width: 100%;
  min-width: 0;
  min-height: 48px;
  padding: .65rem .8rem;
  border: 1px solid #b8c7b9;
  border-radius: 3px;
  background: var(--card);
  color: var(--ink);
}
.url-scan-controls .button { white-space: nowrap; }
.url-scan-controls .button:disabled { cursor: wait; opacity: .7; transform: none; }
.url-scan-help { margin: .65rem 0 0; color: #c2d2c6; font-size: .78rem; }
.scan-status { min-height: 1.5em; margin: .55rem 0 0; color: #f0d48e; font-size: .84rem; }
.scan-status.is-error { color: #f2ac94; }
.url-scan-results[hidden], .checklist-layout[hidden] { display: none; }
.url-scan-results {
  margin-top: 1.25rem;
  padding: 1.15rem;
  background: #f5f0e5;
  color: var(--ink);
}
.scan-results-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; }
.scan-results-heading h3 { margin: 0; font: 600 1.35rem var(--font-display); }
.scan-results-heading > span { color: var(--muted); font: .68rem var(--font-mono); letter-spacing: .08em; text-transform: uppercase; }
.scan-target { margin: .3rem 0 0; color: var(--muted); font-size: .8rem; }
.scan-results-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .55rem; margin: 1rem 0 0; padding: 0; list-style: none; }
.scan-result { display: grid; grid-template-columns: 5.6rem minmax(0, 1fr); gap: .55rem; padding: .7rem; border: 1px solid var(--line); background: var(--card); }
.scan-result-state { font: .65rem var(--font-mono); letter-spacing: .06em; text-transform: uppercase; }
.scan-result-pass .scan-result-state { color: var(--teal); }
.scan-result-review .scan-result-state { color: #a34b35; }
.scan-result-note .scan-result-state { color: #71602d; }
.scan-result strong { display: block; font-size: .8rem; line-height: 1.35; }
.scan-result-detail { display: block; margin-top: .2rem; color: var(--ink-soft); font-size: .75rem; line-height: 1.45; overflow-wrap: anywhere; }
.scan-results-note { margin: .9rem 0 0; color: var(--muted); font-size: .75rem; }
.review-target { grid-column: 1 / -1; margin: 0; color: #e6c66e; font-size: .88rem; font-weight: 700; overflow-wrap: anywhere; }
.reset-checklist:disabled { cursor: not-allowed; opacity: .6; }

.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary {
  position: relative; padding: 1.15rem 2.5rem 1.15rem .1rem; list-style: none;
  cursor: pointer; color: var(--ink); font-weight: 700;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+"; position: absolute; right: .35rem; top: 50%; transform: translateY(-50%);
  color: var(--coral); font: 1.6rem var(--font-display);
}
.faq-list details[open] summary::after { content: "−"; }
.faq-answer { max-width: 800px; padding: 0 2rem 1.3rem .1rem; color: var(--ink-soft); }
.faq-answer p { margin: 0; }

.references { background: #f0ebdf; border-top: 1px solid var(--line); }
.reference-list { display: grid; grid-template-columns: 1fr 1fr; gap: .8rem; counter-reset: sources; }
.reference {
  position: relative; padding: 1.1rem 1.2rem 1.1rem 3rem; border: 1px solid var(--line);
  background: rgba(255,253,247,.7); counter-increment: sources;
}
.reference::before {
  content: counter(sources, decimal-leading-zero); position: absolute; left: 1rem; top: 1.15rem;
  color: var(--coral); font: .7rem var(--font-mono);
}
.reference h3 { margin: 0 0 .35rem; font-size: .9rem; line-height: 1.4; }
.reference p { margin: 0; color: var(--muted); font-size: .77rem; }
.checked-date { margin-top: 1.4rem; color: var(--ink-soft); font: .75rem var(--font-mono); letter-spacing: .04em; }
.checked-date strong { color: var(--ink); }
.footer {
  padding: 2rem 0; background: var(--ink); color: #c8d5c9;
}
.footer-inner { display: flex; justify-content: space-between; gap: 1rem; align-items: center; }
.footer p { margin: 0; font-size: .8rem; }
.footer a { color: #e7c770; }
.footer-resources { display: flex; flex-wrap: wrap; align-items: center; gap: .35rem .8rem; font-size: .76rem; }
.footer-resources span { color: #c8d5c9; font: .67rem var(--font-mono); letter-spacing: .08em; text-transform: uppercase; }
.back-top { white-space: nowrap; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

@media (max-width: 850px) {
  .nav-shell { padding-inline: 1.3rem; gap: 1rem; }
  .main-nav { gap: .8rem; }
  .main-nav a { font-size: .78rem; }
  .hero-grid { grid-template-columns: 1fr minmax(230px, .75fr); gap: 1rem; }
  .hero h1 { font-size: clamp(3rem, 8vw, 5rem); }
  .orbit-one { right: -2%; }
  .orbit-two { left: -2%; }
}
@media (max-width: 680px) {
  html { scroll-padding-top: 8rem; }
  .nav-shell { min-height: auto; padding: .6rem 1rem; align-items: flex-start; flex-direction: column; gap: .4rem; }
  .brand-mark { width: 34px; height: 34px; }
  .main-nav { width: 100%; flex-wrap: wrap; overflow: visible; padding: .3rem 0 .2rem; gap: .45rem 1rem; }
  .main-nav a { white-space: nowrap; }
  .nav-cta { padding: .35rem .65rem; }
  .wrap { width: min(100% - 2rem, 560px); }
  .hero { min-height: auto; padding: 2.6rem 0 2.5rem; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero h1 { max-width: 560px; font-size: clamp(3rem, 14vw, 5rem); }
  .hero-lede { font-size: 1rem; }
  .hero-actions { gap: .5rem; }
  .hero-actions .button { padding-inline: .65rem; font-size: .8rem; }
  .hero-note { margin-top: .9rem; }
  .professor-stage { min-height: 310px; margin: 1rem 0 0; }
  .mascot-frame { width: min(84%, 330px); }
  .orbit-one { right: -1%; top: 7%; }
  .orbit-two { left: 0; bottom: 7%; }
  .hero-index { display: none; }
  .quick-strip .wrap { align-items: flex-start; flex-direction: column; gap: .25rem; }
  .section { padding: 3.7rem 0; }
  .concept-grid { grid-template-columns: 1fr; gap: .8rem; }
  .concept-card:nth-child(2) { transform: none; }
  .overlap-note { grid-template-columns: 70px 1fr; gap: .8rem; margin-top: 1.6rem; padding: .9rem; }
  .overlap-mark { width: 65px; }
  .overlap-mark::before, .overlap-mark::after { width: 40px; height: 40px; }
  .baseline { flex-direction: column; gap: .4rem; }
  .example-header { align-items: flex-start; flex-direction: column; }
  .rewrite-grid { grid-template-columns: 1fr; }
  .build-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .build-grid { grid-template-columns: 1fr; }
  .rewrite-label { align-items: flex-start; flex-direction: column; gap: .35rem; }
  .checklist-layout { grid-template-columns: 1fr; }
  .url-review-panel { padding: .9rem; }
  .url-scan-controls { grid-template-columns: 1fr; }
  .url-scan-controls .button { width: 100%; }
  .scan-results-list { grid-template-columns: 1fr; }
  .scan-results-heading { align-items: flex-start; flex-direction: column; gap: .2rem; }
  .progress-card { position: static; }
  .reference-list { grid-template-columns: 1fr; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}