/* Creosote Labs — site styles.

   The Creosote Labs design system (the proposals tokens): a cream page, forest ink, tan as the one accent.
   Fraunces sets display type and anything read slowly; Inter sets running text and the interface; JetBrains
   Mono sets labels, numbers and the title blocks. Structure comes from hairlines, never boxes or shadows.
   The recurring motif is the shop drawing: a title block under each project, dimension ticks on labels,
   drafting paper behind anything without a picture.

   Order: 1 tokens · 2 base · 3 frame (header, footer) · 4 shared pieces · 5 home · 6 work · 7 courses ·
   8 start · 9 forms, prose, small pages · 10 video and learning · 11 admin bits on public pages · 12 motion. */

/* =============================================================== 1. tokens */
:root {
  color-scheme: light;
  --forest-1000: #0a120c; --forest-900: #0f1a11; --forest-800: #16261a; --forest-700: #1f3324;
  --forest-600: #2a4632; --forest-500: #3a5d44; --forest-300: #6f8f7a; --forest-200: #a8bfb0; --forest-100: #d8e3dc;
  --tan-700: #8a6f48; --tan-600: #a88858; --tan-500: #c9a87a; --tan-400: #d6bc94; --tan-300: #e2cdac; --tan-200: #ecdcc4;
  --cream-100: #faf6ee; --cream-150: #f4f1ea; --cream-200: #f1ebdd; --cream-300: #e8dcc4;
  --ink-700: #2a3530; --ink-500: #5b6862; --tan-ink: #75603f;

  --bg: var(--cream-100);
  --bg-2: var(--cream-200);
  --paper: #fdfcf9;
  --fg: var(--forest-900);
  --fg-2: var(--ink-700);
  --muted: var(--ink-500);
  --accent: var(--tan-500);
  --accent-ink: var(--tan-ink);
  --link: var(--forest-700);
  --rule: rgba(15, 26, 17, .12);
  --rule-strong: rgba(15, 26, 17, .26);
  --grid: rgba(31, 51, 36, .075);
  --btn-bg: var(--forest-700);
  --btn-fg: var(--cream-100);
  --btn-hover: var(--forest-900);
  --band-bg: var(--forest-900);
  --band-fg: var(--cream-300);
  --band-muted: var(--forest-200);
  --band-rule: rgba(232, 220, 196, .16);
  --select: var(--tan-300);
  --draw: var(--forest-700);
  --draw-dim: var(--tan-600);

  --display: "Fraunces", "Iowan Old Style", "Hoefler Text", Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --max: 1240px;
  --gutter: clamp(16px, 4.5vw, 56px);
  --measure: 38rem;
  --section: clamp(72px, 9vw, 136px);
  --radius: 4px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0d1610; --bg-2: var(--forest-1000); --paper: #121e15;
    --fg: var(--cream-300); --fg-2: #d6ccb6; --muted: #9aa89f;
    --accent: var(--tan-500); --accent-ink: var(--tan-400); --link: var(--tan-300);
    --rule: rgba(232, 220, 196, .14); --rule-strong: rgba(232, 220, 196, .28); --grid: rgba(232, 220, 196, .05);
    --btn-bg: var(--cream-300); --btn-fg: var(--forest-900); --btn-hover: var(--cream-100);
    --band-bg: var(--forest-800); --select: var(--forest-600); --grid: rgba(232, 220, 196, .07);
    --draw: var(--cream-300); --draw-dim: var(--tan-500);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0d1610; --bg-2: var(--forest-1000); --paper: #121e15;
  --fg: var(--cream-300); --fg-2: #d6ccb6; --muted: #9aa89f;
  --accent: var(--tan-500); --accent-ink: var(--tan-400); --link: var(--tan-300);
  --rule: rgba(232, 220, 196, .14); --rule-strong: rgba(232, 220, 196, .28); --grid: rgba(232, 220, 196, .05);
  --btn-bg: var(--cream-300); --btn-fg: var(--forest-900); --btn-hover: var(--cream-100);
  --band-bg: var(--forest-800); --select: var(--forest-600); --grid: rgba(232, 220, 196, .07);
  --draw: var(--cream-300); --draw-dim: var(--tan-500);
}

/* =============================================================== 2. base */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: var(--sans); font-size: 17px; line-height: 1.6; font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
::selection { background: var(--select); }
img, svg, video { display: block; max-width: 100%; }
a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: .2em; }
a:hover { text-decoration-color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
h1, h2, h3, h4 { font-family: var(--display); font-weight: 350; letter-spacing: -.015em; line-height: 1.08; margin: 0;
  font-variation-settings: "SOFT" 30, "WONK" 0; text-wrap: balance; }
p { margin: 0 0 1em; text-wrap: pretty; }
.wrap { width: 100%; max-width: calc(var(--max) + 2 * var(--gutter)); margin-inline: auto; padding-inline: var(--gutter); }
.skip { position: absolute; left: -9999px; top: 8px; z-index: 10; background: var(--fg); color: var(--bg); padding: 10px 14px; }
.skip:focus { left: 12px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* =============================================================== 3. frame */
.site-header { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.2) blur(10px); -webkit-backdrop-filter: saturate(1.2) blur(10px); border-bottom: 1px solid transparent;
  transition: border-color 240ms var(--ease); }
.site-header.is-scrolled { border-bottom-color: var(--rule); }
.header-row { display: flex; align-items: center; gap: 28px; min-height: 72px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--fg); text-decoration: none; margin-right: auto; }
.brand svg { width: 26px; height: 26px; color: var(--draw); flex: none; }
.brand-name { font-family: var(--display); font-size: 1.28rem; font-weight: 420; letter-spacing: -.01em; white-space: nowrap;
  font-variation-settings: "SOFT" 50, "opsz" 36; }
.site-nav { display: flex; align-items: center; gap: 28px; }
.site-nav a { position: relative; color: var(--fg-2); text-decoration: none; font-size: .95rem; padding: 10px 0; }
.site-nav a.btn-line { padding: 0 18px; color: var(--fg); }
.site-nav a:hover { color: var(--fg); }
.site-nav a[aria-current="page"] { color: var(--fg); }
.site-nav a[aria-current="page"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: 4px; height: 1px; background: var(--accent); }
.btn-line { display: inline-flex; align-items: center; gap: 8px; min-height: 40px; padding: 0 16px; border: 1px solid var(--rule-strong);
  border-radius: 999px; color: var(--fg); text-decoration: none; font-size: .9rem; white-space: nowrap;
  transition: border-color 200ms var(--ease), background 200ms var(--ease); }
.btn-line:hover { border-color: var(--fg); }
.menu-btn { display: none; }

.site-footer { margin-top: clamp(64px, 8vw, 112px); border-top: 1px solid var(--rule); padding: 56px 0 40px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; align-items: start; }
.footer-line { font-family: var(--display); font-style: italic; font-weight: 300; font-size: clamp(1.25rem, 1rem + .8vw, 1.6rem);
  line-height: 1.3; max-width: 22ch; margin: 18px 0 0; color: var(--fg); font-variation-settings: "SOFT" 60; }
.footer-col h2 { font-family: var(--mono); font-size: .7rem; font-weight: 500; letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted); margin: 6px 0 14px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.footer-col a { color: var(--fg-2); text-decoration: none; }
.footer-col a:hover { color: var(--fg); text-decoration: underline; }
.footer-base { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--rule);
  font-family: var(--mono); font-size: .72rem; letter-spacing: .04em; color: var(--muted); }
.footer-base a { color: var(--muted); text-decoration: none; }
.footer-base a:hover { color: var(--fg); }
.footer-base .push { margin-left: auto; }

/* =============================================================== 4. shared pieces */
.label { display: inline-flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: .72rem; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase; color: var(--accent-ink); margin: 0; }
.label::before { content: ""; width: 22px; height: 1px; background: currentColor; opacity: .8; }
.label--plain::before { display: none; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 50px; padding: 0 24px;
  background: var(--btn-bg); color: var(--btn-fg); border: 0; border-radius: 999px; font: 500 1rem/1 var(--sans);
  text-decoration: none; cursor: pointer; transition: background 200ms var(--ease), transform 200ms var(--ease); }
.btn:hover { background: var(--btn-hover); }
.btn:active { transform: translateY(1px); }
.btn--wide { width: 100%; }
.arrow-link { display: inline-flex; align-items: center; gap: 10px; color: var(--fg); font-weight: 500; text-decoration: none;
  padding: 12px 0; }
.arrow-link .arr { display: inline-block; transition: transform 240ms var(--ease); }
.arrow-link:hover .arr { transform: translateX(4px); }
.arrow-link:hover { text-decoration: underline; text-decoration-color: var(--accent); }
.section { padding-block: var(--section); }
.section + .section { padding-top: 0; }
main > .section:last-child { padding-bottom: 0; }
.section-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 24px 56px; align-items: end;
  margin-bottom: clamp(36px, 5vw, 64px); }
.section-head h2 { font-size: clamp(2rem, 1.3rem + 2.6vw, 3.4rem); margin-top: 18px; }
.section-head p { color: var(--fg-2); max-width: 34rem; margin: 0; font-size: 1.05rem; }
.section-head .aside { justify-self: end; }
.page-head { padding: clamp(56px, 8vw, 112px) 0 clamp(40px, 5vw, 64px); }
.page-head h1 { font-size: clamp(2.8rem, 1.6rem + 5vw, 5.4rem); font-weight: 300; margin-top: 22px; letter-spacing: -.025em;
  font-variation-settings: "SOFT" 40, "opsz" 144; }
.page-head .lede { font-size: clamp(1.1rem, 1rem + .4vw, 1.3rem); color: var(--fg-2); max-width: 40rem; margin: 22px 0 0; }
.crumbs { font-family: var(--mono); font-size: .74rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--fg); }
.crumbs span { margin: 0 .5em; opacity: .6; }

/* the title block: a shop drawing's corner table, used under every project and for facts */
.tblock { display: grid; grid-template-columns: repeat(var(--cols, 3), minmax(0, 1fr)); border: 1px solid var(--rule-strong);
  border-radius: 0; background: var(--paper); }
.tblock > div { padding: 10px 12px 11px; border-left: 1px solid var(--rule); min-width: 0; }
.tblock > div:first-child { border-left: 0; }
.tblock--rows { grid-template-columns: 1fr; }
.tblock--rows > div { border-left: 0; border-top: 1px solid var(--rule); display: grid; grid-template-columns: 8.5rem 1fr; gap: 12px; }
.tblock--rows > div:first-child { border-top: 0; }
.tb-k { display: block; font-family: var(--mono); font-size: .64rem; font-weight: 500; letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 3px; }
.tb-v { display: block; font-size: .9rem; line-height: 1.35; color: var(--fg); overflow-wrap: anywhere; }
.tblock--rows .tb-k { margin: 2px 0 0; }

/* drafting paper, behind anything without a picture */
.paper-grid { background-color: var(--bg-2);
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    linear-gradient(color-mix(in srgb, var(--grid) 200%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--grid) 200%, transparent) 1px, transparent 1px);
  background-size: 16px 16px, 16px 16px, 80px 80px, 80px 80px; }

/* =============================================================== 5. home */
.hero { padding: clamp(48px, 7vw, 104px) 0 0; }
.hero h1 { font-size: clamp(2.6rem, 1.2rem + 5.6vw, 6.1rem); font-weight: 300; letter-spacing: -.03em; line-height: 1.0;
  margin-top: 28px; max-width: 15.5ch; font-variation-settings: "SOFT" 40, "opsz" 144; }
.hero h1 .l2 { display: block; font-style: italic; font-weight: 300; color: var(--forest-500); margin-top: .12em;
  font-variation-settings: "SOFT" 80, "opsz" 144, "WONK" 1; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .hero h1 .l2 { color: var(--tan-400); } }
:root[data-theme="dark"] .hero h1 .l2 { color: var(--tan-400); }
.hero-foot { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 32px 72px; align-items: end;
  margin-top: clamp(36px, 5vw, 64px); }
.hero-foot p { font-size: clamp(1.08rem, 1rem + .35vw, 1.24rem); line-height: 1.6; color: var(--fg-2); margin: 0; max-width: 36rem; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 28px; justify-content: flex-end; }
.sheet { margin-top: clamp(48px, 6vw, 88px); padding: clamp(18px, 2.4vw, 32px) clamp(14px, 2vw, 28px) clamp(10px, 1.6vw, 20px);
  border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); position: relative; }
.sheet::before, .sheet::after { content: ""; position: absolute; top: -5px; width: 9px; height: 9px; border: 1px solid var(--rule-strong);
  background: var(--bg); transform: rotate(45deg); }
.sheet::before { left: 0; }
.sheet::after { right: 0; }
.elevation { width: 100%; height: auto; overflow: visible; }
.elevation .ln { fill: none; stroke: var(--draw); stroke-width: 1.1; vector-effect: non-scaling-stroke; }
.elevation .ln.fine { stroke-width: .7; opacity: .8; }
.elevation .ln.heavy { stroke-width: 1.6; }
.elevation .ln.pull { stroke-width: 1.6; stroke-linecap: round; }
.elevation .ln.hatch { stroke-width: .6; opacity: .45; }
.elevation .dim { fill: none; stroke: var(--draw-dim); stroke-width: .8; vector-effect: non-scaling-stroke; }
.elevation .dim.ext { stroke-dasharray: 2 2; opacity: .7; }
.elevation .dt { font-family: var(--mono); font-size: 8.5px; fill: var(--draw-dim); letter-spacing: .04em; }
.elevation .tag circle { fill: var(--bg); stroke: var(--draw-dim); stroke-width: .8; vector-effect: non-scaling-stroke; }
.elevation .tb-name { font-family: var(--display); font-size: 17px; fill: var(--draw); font-style: italic; font-weight: 300; }
.elevation .tb-k { font-family: var(--mono); font-size: 6.5px; letter-spacing: .14em; fill: var(--draw-dim); }
.elevation .tb-v { font-family: var(--sans); font-size: 9px; fill: var(--draw); }
.elevation .draw-in { stroke-dasharray: var(--len, 2000); stroke-dashoffset: var(--len, 2000); }

.case { background: var(--band-bg); color: var(--band-fg); margin-top: clamp(56px, 6vw, 96px); }
.case .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.9fr); gap: 40px 80px; padding-block: var(--section); }
.case .label { color: var(--tan-500); }
.case h2 { font-size: clamp(1.9rem, 1.2rem + 2.4vw, 3rem); margin-top: 20px; color: var(--cream-100); max-width: 13ch; }
.case-side { position: relative; }
.case-side .sticky { position: sticky; top: 120px; }
.case-body p { font-family: var(--display); font-weight: 300; font-size: clamp(1.25rem, 1.05rem + .7vw, 1.62rem); line-height: 1.45;
  margin: 0 0 1.1em; color: var(--band-fg); font-variation-settings: "SOFT" 50, "opsz" 72; max-width: 40rem; }
.case-body p.close { font-style: italic; color: var(--tan-400); font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.5rem); line-height: 1.2;
  margin-top: 1.4em; padding-top: 1.1em; border-top: 1px solid var(--band-rule); font-variation-settings: "SOFT" 90, "opsz" 144, "WONK" 1; }

.parts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--rule-strong); }
.part { padding: 28px 32px 8px 0; }
.part + .part { padding-left: 32px; border-left: 1px solid var(--rule); }
.part .n { font-family: var(--mono); font-size: .74rem; color: var(--accent-ink); letter-spacing: .08em; }
.part h3 { font-size: clamp(1.45rem, 1.2rem + .7vw, 1.8rem); margin: 34px 0 14px; }
.part p { color: var(--fg-2); margin: 0; max-width: 24rem; }

/* =============================================================== 6. work */
.cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(40px, 5vw, 72px) clamp(24px, 3vw, 44px); }
.cards--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card { display: block; color: inherit; text-decoration: none; }
.card-media { position: relative; aspect-ratio: 16 / 10; overflow: hidden; border: 1px solid var(--rule); background: var(--bg-2); }
.card-media img { width: 100%; height: 100%; object-fit: cover; object-position: top center;
  transition: transform 700ms var(--ease), filter 400ms var(--ease); }
.card:hover .card-media img { transform: scale(1.025); }
.card-blank { position: absolute; inset: 0; display: grid; place-items: center; padding: 24px; text-align: center; }
.card-blank span { font-family: var(--display); font-style: italic; font-weight: 300; font-size: clamp(1.6rem, 1.1rem + 1.6vw, 2.6rem);
  line-height: 1.1; color: var(--fg); font-variation-settings: "SOFT" 80, "opsz" 144, "WONK" 1; max-width: 14ch; }
.card-blank::after { content: ""; position: absolute; inset: 14px; border: 1px solid var(--rule); pointer-events: none; }
.card-title { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; padding: 16px 0 10px;
  border-bottom: 1px solid var(--rule); }
.card-title h3 { font-size: clamp(1.4rem, 1.15rem + .7vw, 1.8rem); }
.card-title .arr { font-size: 1.1rem; color: var(--muted); transition: transform 240ms var(--ease), color 240ms; }
.card:hover .card-title .arr { transform: translateX(4px); color: var(--fg); }
.card-meta { display: flex; flex-wrap: wrap; gap: 4px 18px; padding: 10px 0 8px; font-family: var(--mono); font-size: .7rem;
  letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.card-meta .status { color: var(--accent-ink); }
.card p { color: var(--fg-2); margin: 4px 0 0; font-size: .98rem; max-width: 34rem; }
.group { padding-top: clamp(40px, 5vw, 64px); }
.group + .group { margin-top: clamp(40px, 5vw, 72px); border-top: 1px solid var(--rule); }
.group-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 32px; }
.group-head h2 { font-size: clamp(1.7rem, 1.3rem + 1.4vw, 2.4rem); }
.group-head .count { font-family: var(--mono); font-size: .74rem; color: var(--muted); letter-spacing: .08em; }

.project-hero { padding: clamp(40px, 6vw, 88px) 0 clamp(28px, 4vw, 48px); }
.project-hero h1 { font-size: clamp(2.6rem, 1.4rem + 4.6vw, 5rem); font-weight: 300; margin-top: 26px; letter-spacing: -.025em;
  font-variation-settings: "SOFT" 40, "opsz" 144; }
.project-hero .lede { font-size: clamp(1.12rem, 1rem + .45vw, 1.35rem); color: var(--fg-2); max-width: 42rem; margin: 22px 0 0; }
.project-shot { border: 1px solid var(--rule-strong); background: var(--bg-2); }
.project-shot img { width: 100%; height: auto; }
.project-shot .tblock { border-width: 1px 0 0; }
.project-body { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.75fr); gap: 40px 80px; margin-top: clamp(48px, 6vw, 88px); }
.project-side .sticky { position: sticky; top: 112px; display: grid; gap: 20px; }
.project-links { display: grid; gap: 2px; }
.pitch { font-family: var(--display); font-weight: 300; font-size: clamp(1.4rem, 1.1rem + 1vw, 2rem); line-height: 1.35;
  margin: 0 0 1.6em; padding-bottom: 1.2em; border-bottom: 1px solid var(--rule); font-variation-settings: "SOFT" 60, "opsz" 96; }
.prose { font-size: 1.06rem; line-height: 1.7; color: var(--fg-2); max-width: var(--measure); }
.prose p { margin: 0 0 1.15em; }
.prose h2 { font-size: 1.6rem; margin: 1.8em 0 .6em; color: var(--fg); }
.prose h3 { font-size: 1.25rem; margin: 1.6em 0 .5em; color: var(--fg); }
.prose ul, .prose ol { padding-left: 1.2em; margin: 0 0 1.15em; }
.prose li { margin: 0 0 .45em; padding-left: .2em; }
.prose li::marker { color: var(--accent-ink); }
.prose strong { color: var(--fg); font-weight: 600; }
.prose code { font-family: var(--mono); font-size: .86em; background: var(--bg-2); border: 1px solid var(--rule); padding: .08em .35em; border-radius: 3px; }
.prose pre { background: var(--forest-900); color: var(--cream-300); padding: 16px 18px; border-radius: var(--radius); overflow-x: auto;
  font-size: .86rem; line-height: 1.55; margin: 0 0 1.3em; }
.prose pre code { background: none; border: 0; padding: 0; color: inherit; font-size: inherit; }
.prose blockquote { margin: 0 0 1.2em; padding-left: 18px; border-left: 1px solid var(--accent); font-family: var(--display); font-style: italic; }
.prose a { color: var(--link); }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: clamp(64px, 8vw, 112px); border-top: 1px solid var(--rule); }
.pager a { display: block; padding: 22px 0; color: var(--fg); text-decoration: none; }
.pager a + a, .pager .next { text-align: right; }
.pager small { display: block; font-family: var(--mono); font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 6px; }
.pager span { font-family: var(--display); font-size: 1.4rem; }
.pager a:hover span { text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: .18em; }

/* =============================================================== 7. courses */
.stairs { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); align-items: end; gap: 0; position: relative;
  border-bottom: 1px solid var(--rule-strong); }
.step { display: flex; flex-direction: column; justify-content: flex-start;
  min-height: calc(210px + var(--lvl) * clamp(16px, 2.4vw, 30px)); padding: 18px 18px 20px; border-top: 1px solid var(--rule-strong);
  border-left: 1px solid var(--rule); color: inherit; text-decoration: none; background: var(--bg);
  transition: background 260ms var(--ease); position: relative; }
.step:first-child { border-left: 0; }
.step:hover { background: var(--paper); }
.step .n { font-family: var(--display); font-weight: 200; font-size: clamp(2.6rem, 2rem + 2vw, 4.2rem); line-height: .9; color: var(--accent);
  font-variation-settings: "SOFT" 100, "opsz" 144; }
.step .lv { font-family: var(--mono); font-size: .66rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-top: 18px; }
.step h3 { font-size: clamp(1.08rem, .95rem + .4vw, 1.3rem); margin: 6px 0 0; line-height: 1.15; }
.step .price { margin-top: auto; padding-top: 18px; font-family: var(--mono); font-size: .76rem; color: var(--fg-2); display: flex;
  justify-content: space-between; align-items: baseline; }
.step .price .arr { transition: transform 240ms var(--ease); }
.step:hover .price .arr { transform: translateX(3px); }
.stairs-foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 24px; margin-top: 22px; }
.stairs-foot p { margin: 0; color: var(--muted); }

.ladder { border-top: 1px solid var(--rule-strong); }
.rung { display: grid; grid-template-columns: 6.5rem minmax(0, 1fr) 12rem; gap: 12px 40px; align-items: start; padding: 34px 0 34px;
  border-bottom: 1px solid var(--rule); color: inherit; text-decoration: none; position: relative; }
.rung::before { content: ""; position: absolute; left: 0; bottom: -1px; height: 1px; width: 0; background: var(--fg); transition: width 500ms var(--ease); }
.rung:hover::before { width: 100%; }
.rung .n { font-family: var(--display); font-weight: 200; font-size: 4.6rem; line-height: .82; color: var(--accent);
  font-variation-settings: "SOFT" 100, "opsz" 144; }
.rung .lv { font-family: var(--mono); font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.rung h2 { font-size: clamp(1.6rem, 1.3rem + 1vw, 2.2rem); margin: 8px 0 10px; }
.rung p { margin: 0; color: var(--fg-2); max-width: 40rem; }
.rung .outcome { margin-top: 12px; font-size: .95rem; color: var(--muted); }
.rung .outcome b { font-family: var(--mono); font-weight: 500; font-size: .66rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent-ink); margin-right: .6em; }
.rung .side { text-align: right; font-family: var(--mono); font-size: .8rem; color: var(--fg-2); display: grid; gap: 6px; padding-top: 6px; }
.rung .side strong { font-family: var(--display); font-weight: 350; font-size: 1.7rem; color: var(--fg); letter-spacing: -.01em; }
.offer-pill { display: inline-block; font-family: var(--mono); font-size: .66rem; letter-spacing: .1em; text-transform: uppercase; color: var(--accent-ink);
  border: 1px solid var(--accent); border-radius: 999px; padding: 3px 9px; }
.start-band { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px 48px; align-items: center; margin-top: clamp(56px, 7vw, 96px);
  padding: clamp(28px, 4vw, 48px); border: 1px solid var(--rule-strong); }
.start-band h2 { font-size: clamp(1.7rem, 1.3rem + 1.4vw, 2.5rem); }
.start-band p { margin: 10px 0 0; color: var(--fg-2); }

.course-hero { padding: clamp(40px, 6vw, 88px) 0 clamp(32px, 4vw, 56px); display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 40px 72px; align-items: end; }
.course-hero h1 { font-size: clamp(2.6rem, 1.4rem + 4.4vw, 4.8rem); font-weight: 300; margin-top: 22px; letter-spacing: -.025em;
  font-variation-settings: "SOFT" 40, "opsz" 144; }
.course-hero .lede { font-size: clamp(1.1rem, 1rem + .4vw, 1.3rem); color: var(--fg-2); margin: 20px 0 0; max-width: 36rem; }
.levels { display: flex; gap: 4px; margin-top: 30px; }
.levels a, .levels span { display: grid; place-items: center; min-width: 36px; height: 36px; padding: 0 8px; border: 1px solid var(--rule);
  font-family: var(--mono); font-size: .74rem; color: var(--muted); text-decoration: none; }
.levels a:hover { border-color: var(--fg); color: var(--fg); }
.levels [aria-current] { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.buy { border: 1px solid var(--rule-strong); background: var(--paper); }
.buy-top { padding: 24px 24px 20px; }
.buy .price { font-family: var(--display); font-weight: 300; font-size: 3.2rem; line-height: 1; letter-spacing: -.02em; }
.buy .price s { font-size: 1.4rem; color: var(--muted); margin-left: .35em; }
.buy .format { color: var(--fg-2); font-size: .95rem; margin: 12px 0 18px; }
.buy .note { font-size: .82rem; color: var(--muted); margin: 12px 0 0; }
.buy .tblock { border-width: 1px 0 0; background: transparent; }
.course-body { display: grid; grid-template-columns: 13rem minmax(0, 1fr); gap: 0 64px; }
.course-sec { display: contents; }
.course-sec > h2 { font-family: var(--mono); font-weight: 500; font-size: .74rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent-ink);
  padding-top: 34px; border-top: 1px solid var(--rule-strong); line-height: 1.5; }
.course-sec > .prose { padding: 30px 0 22px; border-top: 1px solid var(--rule); max-width: 44rem; }
.course-sec > .prose ol { list-style: none; padding: 0; counter-reset: s; }
.course-sec > .prose ol > li { counter-increment: s; position: relative; padding: 14px 0 14px 2.8rem; border-bottom: 1px solid var(--rule); margin: 0; }
.course-sec > .prose ol > li::before { content: counter(s, decimal-leading-zero); position: absolute; left: 0; top: 14px; font-family: var(--mono);
  font-size: .76rem; color: var(--accent-ink); padding-top: .3em; }
.course-sec > .prose ol > li strong { display: block; font-family: var(--display); font-weight: 400; font-size: 1.22rem; color: var(--fg); margin-bottom: 2px; }
.course-sec > .prose ol > li:last-child { border-bottom: 0; }
.course-next { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: clamp(56px, 7vw, 96px); }

/* =============================================================== 8. start */
.qs { counter-reset: q; border-top: 1px solid var(--rule-strong); margin: 0; padding: 0; }
.q { display: grid; grid-template-columns: 3.4rem minmax(0, 1fr) auto; gap: 14px 28px; align-items: center; padding: 26px 0; border-bottom: 1px solid var(--rule);
  border-inline: 0; margin: 0; }
.q legend { display: contents; }
.q .n { font-family: var(--mono); font-size: .8rem; color: var(--accent-ink); }
.q .text { font-family: var(--display); font-weight: 350; font-size: clamp(1.2rem, 1.05rem + .5vw, 1.5rem); line-height: 1.3; }
.seg { display: inline-flex; border: 1px solid var(--rule-strong); border-radius: 999px; padding: 3px; gap: 3px; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label { display: inline-flex; align-items: center; min-height: 40px; padding: 0 18px; border-radius: 999px; cursor: pointer; font-size: .95rem;
  color: var(--fg-2); transition: background 180ms var(--ease), color 180ms var(--ease); white-space: nowrap; }
.seg input:checked + label { background: var(--fg); color: var(--bg); }
.seg input:focus-visible + label { outline: 2px solid var(--accent); outline-offset: 2px; }
.start-submit { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 28px; margin-top: 36px; }
.start-submit p { margin: 0; color: var(--muted); font-size: .92rem; }
.result { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 48px 80px; align-items: start; }
.result-course { border: 1px solid var(--rule-strong); background: var(--paper); }
.result-course .head { padding: 26px 26px 22px; display: grid; grid-template-columns: auto 1fr; gap: 6px 20px; align-items: end; }
.result-course .n { grid-row: span 2; font-family: var(--display); font-weight: 200; font-size: 5.6rem; line-height: .8; color: var(--accent);
  font-variation-settings: "SOFT" 100, "opsz" 144; }
.result-course h2 { font-size: clamp(1.6rem, 1.3rem + 1vw, 2.2rem); }
.result-course ol { margin: 0; padding: 0 26px 10px; list-style: none; counter-reset: s; border-top: 1px solid var(--rule); }
.result-course li { counter-increment: s; display: grid; grid-template-columns: 2.4rem 1fr; padding: 11px 0; border-bottom: 1px solid var(--rule); font-size: .98rem; }
.result-course li:last-child { border-bottom: 0; }
.result-course li::before { content: counter(s, decimal-leading-zero); font-family: var(--mono); font-size: .74rem; color: var(--accent-ink); padding-top: .2em; }
.result-course .foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; padding: 18px 26px 22px; border-top: 1px solid var(--rule); }
.result-course .foot .p { font-family: var(--display); font-size: 1.8rem; font-weight: 300; }
.reason { font-family: var(--display); font-weight: 300; font-size: clamp(1.35rem, 1.1rem + .9vw, 1.9rem); line-height: 1.35; margin: 26px 0 0;
  font-variation-settings: "SOFT" 60, "opsz" 96; max-width: 30ch; }

/* =============================================================== 9. forms, prose, small pages */
.form { display: grid; gap: 18px; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field label { display: block; font-family: var(--mono); font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }
.field label .opt { text-transform: none; letter-spacing: 0; font-family: var(--sans); font-size: .8rem; }
.field input, .field textarea { width: 100%; font: inherit; font-size: 1.02rem; color: var(--fg); background: var(--paper);
  border: 1px solid var(--rule-strong); border-radius: var(--radius); padding: 13px 14px; transition: border-color 160ms var(--ease); }
.field textarea { min-height: 180px; resize: vertical; line-height: 1.55; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--fg); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 35%, transparent); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-error { border-left: 2px solid #a8503a; padding: 10px 14px; background: color-mix(in srgb, #a8503a 8%, transparent); color: var(--fg); margin: 0; }
.form-ok { padding: 28px 0; }
.form-ok h2 { font-size: clamp(1.8rem, 1.4rem + 1.4vw, 2.6rem); }
.form-ok p { color: var(--fg-2); margin-top: 12px; }
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: 48px 96px; align-items: start; }
.about-lead { font-family: var(--display); font-weight: 300; font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.6rem); line-height: 1.22; margin: 0 0 1.2em;
  font-variation-settings: "SOFT" 50, "opsz" 144; }
.mailto { display: inline-block; font-family: var(--display); font-size: clamp(1.3rem, 1.1rem + .6vw, 1.7rem); color: var(--fg); text-decoration: none;
  border-bottom: 1px solid var(--accent); padding-bottom: 2px; }
.mailto:hover { border-bottom-color: var(--fg); }
.legal { max-width: 46rem; }
.legal .updated { font-family: var(--mono); font-size: .74rem; color: var(--muted); letter-spacing: .06em; }
.narrow { max-width: 44rem; }
.center-page { padding: clamp(80px, 12vw, 160px) 0; }
.center-page h1 { font-size: clamp(2.4rem, 1.6rem + 3vw, 4rem); font-weight: 300; margin: 20px 0 16px; }
.center-page p { color: var(--fg-2); }
.demo-note { font-family: var(--mono); font-size: .74rem; letter-spacing: .06em; color: var(--accent-ink); border: 1px dashed var(--accent); padding: 10px 14px; margin: 0 0 22px; }

/* =============================================================== 10. video and learning */
.video-frame, .video-poster { position: relative; aspect-ratio: 16 / 9; width: 100%; overflow: hidden; background: var(--forest-900); }
.video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.video-poster { color: var(--cream-300); display: block; isolation: isolate; }
.video-poster-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .55; z-index: -1; }
.video-poster-grid { position: absolute; inset: 0; z-index: -1;
  background-image: linear-gradient(rgba(232,220,196,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(232,220,196,.05) 1px, transparent 1px);
  background-size: 24px 24px; }
.video-poster-num { position: absolute; right: 4%; bottom: -6%; font-family: var(--display); font-weight: 200; font-size: clamp(8rem, 30vw, 22rem);
  line-height: 1; color: var(--tan-500); opacity: .9; font-variation-settings: "SOFT" 100, "opsz" 144; letter-spacing: -.04em; }
.video-poster-play { position: absolute; left: 5%; top: 9%; width: clamp(40px, 6vw, 64px); height: auto; color: var(--cream-300); }
.video-poster-caption { position: absolute; left: 5%; bottom: 9%; margin: 0; max-width: 62%; display: grid; gap: 6px; }
.video-poster-kicker { font-family: var(--mono); font-size: clamp(.6rem, .5rem + .3vw, .74rem); letter-spacing: .14em; text-transform: uppercase; color: var(--tan-400); }
.video-poster-line { font-family: var(--display); font-weight: 300; font-size: clamp(1.1rem, .8rem + 1.4vw, 2rem); line-height: 1.15; color: var(--cream-100); }
.video-poster-soon { position: absolute; right: 4%; top: 9%; font-family: var(--mono); font-size: .66rem; letter-spacing: .14em; text-transform: uppercase;
  border: 1px solid rgba(232,220,196,.4); border-radius: 999px; padding: 4px 10px; color: var(--cream-300); }
.audio-frame { margin-top: 14px; }
.audio-frame audio { width: 100%; }
.course-trailer { margin-top: clamp(8px, 2vw, 16px); }
.learn { padding: clamp(40px, 6vw, 80px) 0; }
.learn-head h1 { font-size: clamp(2.2rem, 1.4rem + 3vw, 3.6rem); font-weight: 300; margin: 18px 0 10px; }
.learn-list { list-style: none; margin: 32px 0 0; padding: 0; border-top: 1px solid var(--rule-strong); }
.learn-list a { display: grid; grid-template-columns: 3rem minmax(0, 1fr) auto; gap: 16px; align-items: baseline; padding: 20px 0; border-bottom: 1px solid var(--rule);
  color: inherit; text-decoration: none; }
.learn-list a:hover .t { text-decoration: underline; text-decoration-color: var(--accent); }
.learn-list .n { font-family: var(--mono); font-size: .8rem; color: var(--accent-ink); }
.learn-list .t { font-family: var(--display); font-size: 1.35rem; }
.learn-list .s { display: block; color: var(--muted); font-size: .95rem; margin-top: 4px; font-family: var(--sans); }
.learn-list .m { font-family: var(--mono); font-size: .74rem; color: var(--muted); }
.lesson { display: grid; grid-template-columns: minmax(0, 1fr); gap: 32px; max-width: 54rem; }
.lesson .prose { max-width: none; }
.lesson .prose h2 { font-family: var(--mono); font-weight: 500; font-size: .74rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent-ink);
  padding-top: 22px; border-top: 1px solid var(--rule); margin-top: 2.2em; }
.lesson .prose ol > li { padding-left: .3em; }
.lesson-nav { display: flex; justify-content: space-between; gap: 16px; border-top: 1px solid var(--rule); padding-top: 18px; }

/* =============================================================== 11. admin bits on public pages */
.admin-brief { margin-top: 14px; padding: 16px 18px; border: 1px dashed var(--accent); background: color-mix(in srgb, var(--accent) 10%, var(--bg)); font-size: .92rem; }
.admin-brief-kicker { font-family: var(--mono); font-size: .66rem; letter-spacing: .14em; text-transform: uppercase; color: var(--accent-ink); margin: 0 0 8px; }
.admin-brief-text p { margin: 0 0 .6em; }
.admin-brief-text ol, .admin-brief-text ul { margin: 0 0 .6em; padding-left: 1.2em; }
.admin-brief-links { display: flex; flex-wrap: wrap; gap: 6px 16px; margin: 8px 0 0; font-size: .85rem; }
.edit-pill { position: fixed; right: 16px; bottom: 16px; z-index: 30; font-family: var(--mono); font-size: .7rem; letter-spacing: .1em; text-transform: uppercase;
  background: var(--fg); color: var(--bg); padding: 10px 14px; border-radius: 999px; text-decoration: none; box-shadow: 0 8px 24px rgba(0,0,0,.18); }

/* =============================================================== 12. small screens and motion */
@media (max-width: 1080px) {
  .stairs { grid-template-columns: repeat(3, minmax(0, 1fr)); border-bottom: 0; }
  .step { min-height: 200px; border-bottom: 1px solid var(--rule); }
  .step:nth-child(3n + 1) { border-left: 0; }
  .cards--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
  .site-nav { position: fixed; inset: 72px 0 auto 0; flex-direction: column; align-items: stretch; gap: 0; padding: 8px var(--gutter) 24px;
    background: var(--bg); border-bottom: 1px solid var(--rule); transform: translateY(-8px); opacity: 0; visibility: hidden;
    transition: opacity 200ms var(--ease), transform 200ms var(--ease), visibility 0s 200ms; }
  .site-nav a { padding: 16px 0; border-bottom: 1px solid var(--rule); font-size: 1.1rem; }
  .site-nav a[aria-current="page"]::after { display: none; }
  .site-nav .btn-line { margin-top: 16px; justify-content: center; min-height: 48px; border-bottom: 1px solid var(--rule-strong); }
  .nav-open .site-nav { transform: none; opacity: 1; visibility: visible; transition: opacity 200ms var(--ease), transform 200ms var(--ease); }
  .menu-btn { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 2px; background: none; border: 0; color: var(--fg);
    font: 500 .9rem var(--sans); cursor: pointer; }
  .menu-btn i { display: block; width: 18px; height: 1px; background: currentColor; box-shadow: 0 5px 0 currentColor; transform: translateY(-2.5px); }
  .header-cta { display: none; }
  .hero-foot, .section-head, .case .wrap, .project-body, .course-hero, .split, .result { grid-template-columns: minmax(0, 1fr); }
  .hero-actions { justify-content: flex-start; }
  .parts { grid-template-columns: minmax(0, 1fr); }
  .part, .part + .part { padding: 26px 0 24px; border-left: 0; border-top: 1px solid var(--rule); }
  .part:first-child { border-top: 0; }
  .part h3 { margin-top: 14px; }
  .cards, .cards--3 { grid-template-columns: minmax(0, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-top > :first-child { grid-column: 1 / -1; }
  .course-body { grid-template-columns: minmax(0, 1fr); }
  .course-sec > h2 { padding-top: 28px; }
  .course-sec > .prose { border-top: 0; padding-top: 12px; }
  .rung { grid-template-columns: 4.2rem minmax(0, 1fr); }
  .rung .n { font-size: 3.4rem; }
  .rung .side { grid-column: 2; text-align: left; grid-auto-flow: column; justify-content: start; align-items: baseline; gap: 16px; }
  .start-band { grid-template-columns: minmax(0, 1fr); }
  .case-side .sticky, .project-side .sticky { position: static; }
  .sheet { padding-inline: 0; overflow-x: auto; }
  .sheet .elevation { min-width: 0; }
  .q { grid-template-columns: 2.4rem minmax(0, 1fr); }
  .q .seg { grid-column: 2; justify-self: start; }
  .course-next, .pager { grid-template-columns: 1fr; }
  .pager a + a, .pager .next { text-align: left; border-top: 1px solid var(--rule); }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .stairs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .step:nth-child(3n + 1) { border-left: 1px solid var(--rule); }
  .step:nth-child(2n + 1) { border-left: 0; }
  .form .row { grid-template-columns: 1fr; }
  .tblock { --cols: 1 !important; }
  .tblock > div { border-left: 0; border-top: 1px solid var(--rule); }
  .tblock > div:first-child { border-top: 0; }
  .tblock--rows > div { grid-template-columns: 6.5rem 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-base .push { margin-left: 0; }
  .levels a, .levels span { min-width: 32px; }
}
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(14px); transition: opacity 900ms var(--ease), transform 900ms var(--ease); }
  .reveal.is-in { opacity: 1; transform: none; }
  .elevation.is-drawing .draw-in { animation: draw 2.2s var(--ease) forwards; animation-delay: var(--d, 0s); }
}
@keyframes draw { to { stroke-dashoffset: 0; } }
@media print {
  .site-header, .site-footer, .hero-actions, .btn { display: none !important; }
  body { background: #fff; color: #000; }
}