/* 248 Anthems — flagship-brand · "The Ruled Instrument"
 * Brand-standard implementation of docs/BRAND-SYSTEM.md v2 ("Rhythm is Structure").
 * Light bone editorial system: hairline rules, numbered mono sections, condensed
 * display type, lime as signal only. Motion runs on the 112 BPM clock.
 * Palette ratio 70/20/8/2 — bone / graphite / lime / orange. */

/* ---------- fonts (self-hosted woff2, latin subsets) ---------- */

@font-face {
  font-family: 'Barlow Condensed';
  src: url('/fonts/barlow-condensed-latin-500-normal.woff2') format('woff2');
  font-weight: 500; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Barlow Condensed';
  src: url('/fonts/barlow-condensed-latin-600-normal.woff2') format('woff2');
  font-weight: 600; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Barlow Condensed';
  src: url('/fonts/barlow-condensed-latin-700-normal.woff2') format('woff2');
  font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Inter Variable';
  src: url('/fonts/inter-latin-wght-normal.woff2') format('woff2-variations');
  font-weight: 100 900; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('/fonts/ibm-plex-mono-latin-400-normal.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('/fonts/ibm-plex-mono-latin-500-normal.woff2') format('woff2');
  font-weight: 500; font-style: normal; font-display: swap;
}

/* ---------- tokens ---------- */

:root {
  --bone: #F6F4F1;
  --graphite: #1E1E1E;
  --charcoal: #0D0D0D;
  --ash: #D9D8D6;
  --lime: #CCFF00;
  --orange: #FF6A00;

  --ink: var(--graphite);
  --ink-2: #4A4A47;            /* secondary body on bone, ~8:1 */
  --ink-3: #63615D;            /* quiet mono labels on bone, ~5.6:1 */
  --line: var(--ash);          /* hairlines on bone */

  --d-fg: var(--bone);
  --d-dim: #A9A7A2;            /* dim text on graphite, ~7:1 */
  --d-line: rgba(246, 244, 241, .16);

  --font-display: 'Barlow Condensed', 'Arial Narrow', sans-serif;
  --font-text: 'Inter Variable', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', monospace;

  --maxw: 1440px;
  --gutter: clamp(1rem, 5vw, 4.5rem);
  --header-h: 64px;
}

/* ---------- base ---------- */

* { box-sizing: border-box; margin: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--font-text);
  font-size: 1rem;                 /* 16px body */
  line-height: 1.55;
  font-weight: 430;
  background: var(--bone);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  padding-top: var(--header-h);
}
::selection { background: var(--graphite); color: var(--lime); }

a { color: inherit; }
:focus-visible { outline: 2px solid var(--orange); outline-offset: 3px; }
.on-dark :focus-visible, .band :focus-visible, .dock :focus-visible, .footer :focus-visible {
  outline-color: var(--lime);
}
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .005em;
  line-height: 1;
}

.mono {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: .6875rem;             /* 11px */
  letter-spacing: .12em;
  text-transform: uppercase;
  line-height: 1.5;
}

.container { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--graphite); color: var(--bone);
  font-family: var(--font-mono); font-size: .8rem; letter-spacing: .08em;
  padding: .8rem 1.2rem;
}
.skip:focus { left: 0; }

/* ---------- ratio stripe primitive (24 structure + 8 conversion) ---------- */

.stripe { display: flex; gap: 2px; }
.stripe i { flex: 1; background: var(--graphite); }
.stripe i:nth-child(n+25) { background: var(--lime); }
/* dim variant — cells start quiet, get "lit" by JS (progress) */
.stripe.dim i { background: var(--ash); }
.stripe.dim i.lit { background: var(--graphite); }
.stripe.dim i:nth-child(n+25).lit { background: var(--lime); }
/* on-dark variant */
.stripe.dark i { background: rgba(246, 244, 241, .18); }
.stripe.dark i.lit { background: var(--bone); }
.stripe.dark i:nth-child(n+25) { background: rgba(204, 255, 0, .22); }
.stripe.dark i:nth-child(n+25).lit { background: var(--lime); }

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

.header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: var(--bone);
  border-bottom: 1px solid var(--line);
}
.header-bar {
  max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter);
  height: calc(var(--header-h) - 4px);
  display: flex; align-items: center; gap: clamp(1rem, 3vw, 2.5rem);
  transition: height .25s ease;
}
.header.compact .header-bar { height: 48px; }

.wordmark {
  display: flex; align-items: baseline; gap: .45em;
  font-family: var(--font-display); text-transform: uppercase;
  text-decoration: none; white-space: nowrap;
}
.wordmark .wm-num { font-weight: 700; font-size: 1.5rem; letter-spacing: .01em; }
.wordmark .wm-word { font-weight: 500; font-size: .875rem; letter-spacing: .34em; }

.nav { display: flex; gap: clamp(.9rem, 2.2vw, 1.9rem); margin-left: auto; }
.nav a {
  font-family: var(--font-mono); font-weight: 500; font-size: .6875rem;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-3); text-decoration: none; padding-block: .3em;
  border-bottom: 2px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}
.nav a:hover { color: var(--ink); border-color: var(--graphite); }

.header-cta {
  display: inline-flex; align-items: center; gap: .6em;
  background: var(--graphite); color: var(--bone);
  font-family: var(--font-mono); font-weight: 500; font-size: .6875rem;
  letter-spacing: .12em; text-transform: uppercase; text-decoration: none;
  padding: .75em 1.1em; white-space: nowrap;
  transition: background .18s ease;
}
.header-cta svg { width: 8px; height: 10px; display: block; }
.header-cta:hover { background: var(--charcoal); }
.header-cta:hover svg { color: var(--lime); }

/* 32-cell scroll progress along the header's bottom edge */
.header-progress { display: flex; gap: 1px; height: 4px; }
.header-progress i { flex: 1; background: transparent; }
.header-progress i.lit { background: var(--graphite); }
.header-progress i:nth-child(n+25).lit { background: var(--lime); }

@media (max-width: 860px) {
  .nav { display: none; }
  .header-cta { margin-left: auto; }
}

/* ---------- hero ---------- */

.hero { padding-top: clamp(3.5rem, 9vh, 6.5rem); }
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
  gap: clamp(2rem, 5vw, 5rem); align-items: end;
}
.hero-kicker { color: var(--ink-3); display: flex; align-items: center; gap: 1rem; }
.hero-kicker::before { content: ""; width: 2.5rem; height: 1px; background: var(--graphite); }

.hero h1 {
  font-weight: 700;
  font-size: clamp(3.25rem, 9.5vw, 6.75rem);
  line-height: .95;
  letter-spacing: .002em;
  margin-top: .35em;
  max-width: 10ch;
}
.hero h1 .dot { color: var(--orange); }

.hero-sub {
  margin-top: 1.6rem; max-width: 46ch;
  font-size: 1.0625rem; line-height: 1.6; color: var(--ink-2);
}
.hero-ctas { display: flex; gap: .75rem; margin-top: 2rem; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: .6em;
  font-family: var(--font-mono); font-weight: 500; font-size: .75rem;
  letter-spacing: .12em; text-transform: uppercase; text-decoration: none;
  padding: .95em 1.5em; transition: background .18s ease, color .18s ease, border-color .18s ease;
}
.btn-solid { background: var(--graphite); color: var(--bone); }
.btn-solid:hover { background: var(--charcoal); }
.btn-line { border: 1px solid var(--graphite); color: var(--ink); }
.btn-line:hover { background: var(--graphite); color: var(--bone); }

/* right rail: the system numbers */
.hero-rail { display: grid; gap: 1.1rem; justify-items: start; justify-content: end; padding-bottom: .4rem; }
.rail-ratio {
  font-family: var(--font-display); font-weight: 700; line-height: .9;
  font-size: clamp(4rem, 8.5vw, 7rem); letter-spacing: 0;
  display: flex; align-items: baseline; gap: .08em;
}
.rail-ratio .slash { font-weight: 500; color: var(--ink-3); font-size: .75em; }
.rail-ratio .eight { background: var(--lime); color: var(--charcoal); padding: 0 .08em; }
.rail-spec { display: grid; grid-template-columns: auto 1fr; gap: .35rem 1rem; align-items: baseline; }
.rail-spec dt {
  font-family: var(--font-display); font-weight: 600; font-size: 1.6rem; line-height: 1;
}
.rail-spec dd { margin: 0; color: var(--ink-3); }

/* hero ratio stripe */
.hero-stripe-wrap { margin-top: clamp(2.5rem, 6vh, 4.5rem); }
.hero-stripe { height: 36px; }
.hero-stripe-caption {
  display: flex; justify-content: space-between; gap: 1rem;
  margin-top: .55rem; color: var(--ink-3);
}

@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; align-items: start; }
  .hero-rail { grid-row: 2; padding-top: 1.4rem; border-top: 1px solid var(--line); justify-content: start; }
  .hero-stripe { height: 26px; }
}
@media (max-width: 600px) { .hide-s { display: none; } }

/* ---------- player band (dark) + tempo grid canvas ---------- */

.band { background: var(--graphite); color: var(--d-fg); }
.band-grid-strip { background: var(--charcoal); }
.tempo-grid-wrap { position: relative; padding-block: .9rem .7rem; }
#tempo-grid { display: block; width: 100%; height: 128px; }
.tempo-grid-caption {
  display: flex; justify-content: space-between; gap: 1rem;
  padding-bottom: .8rem; color: var(--d-dim);
}
.tempo-grid-caption .cap-conv { color: var(--lime); }

.band-inner { padding-block: clamp(2rem, 5vh, 3.5rem); }
.band-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 1rem;
  flex-wrap: wrap; margin-bottom: 1.6rem;
  padding-bottom: 1rem; border-bottom: 1px solid var(--d-line);
}
.band-head .mono { color: var(--d-dim); }
.band-title { display: flex; align-items: center; gap: 1rem; }
.band-title h2 { font-size: 1.75rem; font-weight: 600; letter-spacing: .02em; }

/* BPM chip + pulse ring */
.bpm-chip { display: flex; align-items: center; gap: .8rem; }
.bpm-chip .mono { color: var(--d-dim); text-align: right; }
.pulse-ring { width: 56px; height: 56px; flex: none; }
.pulse-ring text {
  font-family: var(--font-mono); font-weight: 500; font-size: 11px;
  fill: var(--bone); letter-spacing: .05em;
}
.pulse-ring .pr-sub { font-size: 6.5px; fill: var(--d-dim); letter-spacing: .18em; }

.band-body {
  display: grid; grid-template-columns: 128px minmax(0, 1fr);
  gap: clamp(1.4rem, 3vw, 2.5rem); align-items: start;
}
.band-art { width: 128px; }
.band-art svg { display: block; width: 100%; height: auto; }

/* 32-cell playback progress stripe */
.band-progress { margin-top: 1.8rem; }
.band-progress .stripe { height: 14px; }
.band-progress-caption {
  display: flex; justify-content: space-between; margin-top: .5rem; color: var(--d-dim);
}

@media (max-width: 720px) {
  .band-body { grid-template-columns: 1fr; }
  .band-art { width: 96px; }
}

/* ---- AnthemPlayer skin: ruled instrument on graphite ---- */
.band .ap {
  --ap-accent: var(--lime);
  --ap-accent-fg: var(--charcoal);
  --ap-font: var(--font-text);
  --ap-radius: 0; --ap-row-radius: 0;
  --ap-dim: var(--d-dim);
  --ap-line: var(--d-line);
}
.band .ap-kicker, .band .ap-panel-title, .band .ap-time, .band .ap-row-num,
.band .ap-badge, .band .ap-lib-course, .band .ap-row-meta, .band .ap-mini, .band .ap-filter {
  font-family: var(--font-mono);
}
.band .ap-kicker { letter-spacing: .18em; }
.band .ap-title { font-family: var(--font-display); text-transform: uppercase; font-weight: 600; letter-spacing: .015em; font-size: clamp(1.35rem, 2.6vw, 1.9rem); }
.band .ap-btn { border: 1px solid var(--d-line); border-radius: 0; }
.band .ap-btn:hover { border-color: var(--bone); transform: none; }
.band .ap-play { background: var(--lime); color: var(--charcoal); border-color: var(--lime); }
.band .ap-play:hover { background: #d8ff3d; }
.band .ap-bar::before { inset: 10px 0; border-radius: 0; }
.band .ap-bar-fill, .band .ap-bar-buffer { inset: 10px auto 10px 0; border-radius: 0; }
.band .ap-bar-knob { width: 3px; height: 18px; border-radius: 0; box-shadow: none; }
.band .ap-mini, .band .ap-filter { border-radius: 0; }
.band .ap-status { font-family: var(--font-mono); font-size: .72rem; }
.band-note { margin-top: 1.6rem; color: var(--d-dim); }

/* ---------- sticky dock ---------- */

.dock {
  position: sticky; bottom: 0; z-index: 90;
  background: var(--charcoal); color: var(--d-fg);
  border-top: 1px solid var(--d-line);
}
.dock-inner {
  max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter);
  display: flex; align-items: center; gap: 1rem;
  height: 56px;
}
.dock-art { width: 30px; height: 30px; flex: none; }
.dock-art svg { display: block; width: 100%; height: 100%; }
.dock-title {
  font-family: var(--font-display); font-weight: 600; text-transform: uppercase;
  font-size: .95rem; letter-spacing: .03em; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis; max-width: 30ch;
}
.dock-transport { display: flex; align-items: center; gap: .1rem; flex: none; }
.dock-btn { display: inline-grid; place-items: center; width: 34px; height: 34px; color: var(--d-fg); }
.dock-btn svg { width: 16px; height: 16px; }
.dock-btn:hover { color: var(--lime); }
.dock-stripe { flex: 1; min-width: 60px; height: 10px; }
.dock-bpm { display: flex; align-items: center; gap: .6rem; flex: none; }
.dock-bpm .mono { color: var(--d-dim); }
.dock-ring { width: 26px; height: 26px; flex: none; }
@media (max-width: 760px) {
  .dock-title { max-width: 14ch; }
  .dock-bpm .mono { display: none; }
}
@media (max-width: 540px) {
  .dock-inner { gap: .6rem; }
  .dock-art, .dock-ring { display: none; }
}

/* ---------- numbered section head pattern ---------- */

.section { padding-block: clamp(3.5rem, 9vh, 6.5rem); }
.sec-head {
  display: flex; align-items: baseline; gap: 1.1rem;
  margin-bottom: clamp(1.8rem, 4vh, 2.8rem);
}
.sec-no { color: var(--ink); flex: none; }
.sec-rule { flex: 1; height: 1px; background: var(--line); align-self: center; }
.sec-label { color: var(--ink-3); flex: none; }
.on-dark .sec-rule { background: var(--d-line); }
.on-dark .sec-no { color: var(--d-fg); }
.on-dark .sec-label { color: var(--d-dim); }

.sec-display {
  font-size: clamp(2.1rem, 4.6vw, 3.5rem);
  font-weight: 600; line-height: .98; max-width: 22ch;
  margin-bottom: clamp(1.6rem, 4vh, 2.6rem);
}
.sec-sub { max-width: 52ch; color: var(--ink-2); margin: -1rem 0 2.2rem; }

/* ---------- 01 pillars ---------- */

.pillars {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-block: 1px solid var(--line);
}
.pillar {
  padding: clamp(1.4rem, 2.5vw, 2.2rem) clamp(1.1rem, 2vw, 1.8rem);
  border-left: 1px solid var(--line);
  display: grid; gap: 1.1rem; align-content: start;
}
.pillar:first-child { border-left: 0; padding-left: 0; }
.pillar-icon { width: 40px; height: 40px; color: var(--graphite); }
.pillar-icon svg { display: block; width: 100%; height: 100%; }
.pillar-icon .sig { color: var(--lime); }
.pillar h3 { font-size: 1.5rem; font-weight: 600; letter-spacing: .03em; }
.pillar .pillar-no { color: var(--ink-3); }
.pillar p { color: var(--ink-2); font-size: .9375rem; max-width: 24ch; }
@media (max-width: 900px) {
  .pillars { grid-template-columns: 1fr 1fr; }
  .pillar:nth-child(3) { border-left: 0; padding-left: 0; }
  .pillar:nth-child(n+3) { border-top: 1px solid var(--line); }
}
@media (max-width: 480px) {
  .pillars { grid-template-columns: 1fr; }
  .pillar { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); }
  .pillar:first-child { border-top: 0; }
}

/* ---------- 02 the system ---------- */

.metrics {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line);
  margin-bottom: clamp(2rem, 5vh, 3rem);
}
.metric { background: var(--bone); padding: clamp(1.2rem, 2.4vw, 2rem); display: grid; gap: .6rem; }
.metric-num {
  font-family: var(--font-display); font-weight: 700; line-height: .9;
  font-size: clamp(2.8rem, 6vw, 5rem); font-variant-numeric: tabular-nums;
}
.metric-label { color: var(--ink-3); }
.metric.conv { background: var(--lime); }
.metric.conv .metric-num, .metric.conv .metric-label { color: var(--charcoal); }
@media (max-width: 720px) { .metrics { grid-template-columns: 1fr 1fr; } }

.method-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line);
}
.method-card { background: var(--bone); padding: clamp(1.4rem, 2.6vw, 2.2rem); display: flex; flex-direction: column; }
.method-card .mono { color: var(--ink-3); }
.method-card h3 { font-size: 1.6rem; margin: .8rem 0 .9rem; letter-spacing: .02em; }
.method-card p { color: var(--ink-2); font-size: .9375rem; }
.method-card .footnote {
  margin-top: auto; padding-top: 1rem;
  font-family: var(--font-mono); font-weight: 400; font-size: .6875rem;
  letter-spacing: .01em; line-height: 1.6; color: var(--ink-3);
  text-transform: none; border-top: 1px dashed var(--ash);
}
.method-card .footnote::before { content: "FN — "; font-weight: 500; letter-spacing: .1em; }
.method-card p + .footnote { margin-top: 1.2rem; }
@media (max-width: 900px) { .method-grid { grid-template-columns: 1fr; } }

/* ---------- 03 library ---------- */

.library-meta { display: flex; gap: 1.4rem; flex-wrap: wrap; color: var(--ink-3); margin-bottom: 1.4rem; }
.library-table { border-top: 1px solid var(--graphite); }
.lib-course-row {
  display: flex; align-items: baseline; gap: 1rem;
  padding: 1.1rem 0 .5rem; color: var(--ink);
}
.lib-course-row .lib-course-count { color: var(--ink-3); }
.lib-rows { list-style: none; margin: 0; padding: 0; }
.lib-row {
  display: grid; width: 100%; text-align: left;
  grid-template-columns: 2.6rem minmax(0, 1fr) 9.5rem 7rem 2.6rem;
  gap: 1rem; align-items: center;
  padding: .68rem 0;
  border-top: 1px solid var(--line);
  transition: background .15s ease;
}
.lib-row:hover { background: #EFEDE8; }
.lib-row .lr-num { font-family: var(--font-mono); font-weight: 400; font-size: .6875rem; color: var(--ink-3); }
.lib-row .lr-title {
  font-family: var(--font-display); font-weight: 600; text-transform: uppercase;
  font-size: 1.05rem; letter-spacing: .02em; line-height: 1.1;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.lib-row .lr-version, .lib-row .lr-kind {
  font-family: var(--font-mono); font-weight: 400; font-size: .6875rem;
  letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.lib-row .lr-play { display: inline-grid; place-items: center; width: 26px; height: 26px; color: var(--ink-3); }
.lib-row .lr-play svg { width: 12px; height: 12px; }
.lib-row:hover .lr-play { color: var(--ink); }
.lib-row.current { box-shadow: inset 3px 0 0 var(--lime); background: #EFEDE8; padding-left: .7rem; }
.lib-row.current .lr-num { color: var(--ink); }
.lib-row.pending .lr-title { color: var(--ink-3); }
.lr-badge {
  font-family: var(--font-mono); font-size: .6rem; letter-spacing: .1em;
  border: 1px solid var(--ash); padding: .1em .5em; margin-left: .6em;
  color: var(--ink-3); text-transform: uppercase;
}
.library-note { margin-top: 1.2rem; color: var(--ink-3); }
@media (max-width: 760px) {
  .lib-row { grid-template-columns: 2rem minmax(0, 1fr) 2.2rem; }
  .lib-row .lr-version, .lib-row .lr-kind { display: none; }
  .lib-row .lr-title { white-space: normal; }
}

/* ---------- 04 course anthems ---------- */

.courses-grid {
  /* 12 tiles: auto-fill at this minimum yields 4 / 3 / 2 / 1 columns — all divide 12, no voids */
  display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 1px;
  background: var(--line); border: 1px solid var(--line);
}
.course-card { background: var(--bone); text-decoration: none; display: flex; flex-direction: column; }
.course-chip {
  position: relative; background: var(--cc, var(--graphite)); color: var(--bone);
  min-height: 150px; padding: 1.1rem 1.2rem;
  display: flex; flex-direction: column; justify-content: flex-end; gap: .9rem;
}
.course-chip h3 { font-size: clamp(1.6rem, 2.4vw, 2rem); font-weight: 700; letter-spacing: .02em; line-height: .95; }
.course-chip .stripe { height: 7px; }
.course-chip .stripe i { background: rgba(246, 244, 241, .30); }
.course-chip .stripe i:nth-child(n+25) { background: var(--lime); }
.course-press {
  position: absolute; top: 1rem; right: 1.1rem;
  font-family: var(--font-mono); font-size: .6rem; font-weight: 500;
  letter-spacing: .14em; color: rgba(246, 244, 241, .75); text-transform: uppercase;
}
.course-foot {
  display: flex; align-items: center; justify-content: space-between; gap: .5rem;
  padding: .85rem 1.2rem;
}
.course-foot .mono { color: var(--ink-3); }
.course-foot .course-tracks { white-space: nowrap; }
/* the 12th tile — honest contact, not a fake course */
.course-card.commission .course-chip { background: var(--bone); color: var(--ink); box-shadow: inset 0 0 0 1px var(--ash); }
.course-card.commission .course-chip h3 { color: var(--ink); max-width: 9ch; }
.course-card.commission .course-chip .stripe i { background: var(--ash); }
.course-card.commission .course-chip .stripe i:nth-child(n+25) { background: #C9CDA4; }
.course-card.commission .course-press { color: var(--ink-3); }
.course-card.commission:hover .course-chip h3 { text-decoration-color: var(--orange); }
.course-foot .cf-arrow { color: var(--ink-3); transition: transform .18s ease, color .18s ease; }
.course-card:hover .cf-arrow { transform: translateX(4px); color: var(--ink); }
.course-card:hover .course-chip h3 { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 5px; }

/* ---------- 05 journal cards ---------- */

.journal-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line);
}
.journal-card {
  background: var(--bone); text-decoration: none;
  padding: clamp(1.4rem, 2.6vw, 2.2rem);
  display: flex; flex-direction: column; gap: 1rem; min-height: 240px;
}
.journal-card .mono { color: var(--ink-3); }
.journal-card h3 { font-size: 1.7rem; letter-spacing: .02em; max-width: 14ch; }
.journal-card p { color: var(--ink-2); font-size: .9375rem; max-width: 34ch; }
.journal-card .jc-src { margin-top: auto; padding-top: 1rem; border-top: 1px dashed var(--ash); }
.journal-card:hover h3 { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 5px; }
@media (max-width: 900px) { .journal-grid { grid-template-columns: 1fr; } .journal-card { min-height: 0; } }

/* ---------- 06 join ---------- */

.join { border-top: 1px solid var(--line); }
.join-grid { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); gap: clamp(2rem, 5vw, 5rem); align-items: start; }
.join p.lede { color: var(--ink-2); max-width: 44ch; margin-top: 1.2rem; }
.join-ctas { display: flex; gap: .75rem; margin-top: 2rem; flex-wrap: wrap; }
.join-contact { display: grid; gap: .8rem; border: 1px solid var(--line); padding: 1.4rem; }
.join-contact .jc-label { color: var(--ink-3); }
.join-contact a.mail {
  font-family: var(--font-mono); font-weight: 500; font-size: .9rem; letter-spacing: .04em;
  color: var(--ink); text-decoration: none;
  border-bottom: 2px solid var(--orange); padding-bottom: .2em; width: max-content; max-width: 100%;
  overflow-wrap: anywhere;
}
.join-contact a.mail:hover { background: var(--graphite); color: var(--bone); }
.join-contact .jc-note { font-family: var(--font-mono); font-weight: 400; font-size: .6875rem; letter-spacing: .02em; color: var(--ink-3); text-transform: none; }
@media (max-width: 860px) { .join-grid { grid-template-columns: 1fr; } }

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

.footer { background: var(--charcoal); color: var(--d-fg); }
.footer-inner { padding-block: clamp(2.5rem, 6vh, 4rem) 0; }
.footer-top {
  display: flex; align-items: baseline; justify-content: space-between; gap: 1.5rem;
  flex-wrap: wrap; padding-bottom: 2rem; border-bottom: 1px solid var(--d-line);
}
.footer-top .wordmark { color: var(--d-fg); }
.footer-tag { color: var(--d-dim); }
.footer-cols {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem; padding-block: 2rem;
}
.footer-col h4 { font-family: var(--font-mono); font-weight: 500; font-size: .6875rem; letter-spacing: .14em; text-transform: uppercase; color: var(--d-dim); margin-bottom: 1rem; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .45rem; }
.footer-col ul.fc-courses { display: block; columns: 2; column-gap: 2rem; }
.footer-col ul.fc-courses li { margin-bottom: .45rem; break-inside: avoid; }
.footer-col a {
  font-family: var(--font-mono); font-weight: 400; font-size: .75rem; letter-spacing: .05em;
  color: var(--d-fg); text-decoration: none; border-bottom: 1px solid transparent;
}
.footer-col a:hover { border-color: var(--lime); }
.footer-col .fc-here { font-family: var(--font-mono); font-size: .75rem; letter-spacing: .05em; color: var(--lime); }
.footer-col .fc-dim { color: var(--d-dim); }
.footer-sig { padding-block: 0 0; }
.footer-sig .stripe { height: 10px; }
.footer .stripe i { background: rgba(246, 244, 241, .35); }
.footer .stripe i:nth-child(n+25) { background: var(--lime); }
.footer-base {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  padding-block: 1.1rem 1.4rem; color: var(--d-dim);
}
@media (max-width: 760px) { .footer-cols { grid-template-columns: 1fr; } }

/* ---------- reveals + motion ---------- */

.rv { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s cubic-bezier(.2, .7, .2, 1); }
.rv.in { opacity: 1; transform: none; }
.rv-rule { transform-origin: left center; transform: scaleX(0); transition: transform .9s cubic-bezier(.2, .7, .2, 1); }
.rv-rule.in { transform: scaleX(1); }

@media (prefers-reduced-motion: reduce) {
  .rv, .rv-rule { opacity: 1; transform: none; transition: none; }
  .header-bar { transition: none; }
  .btn, .nav a, .header-cta, .course-foot .cf-arrow, .lib-row { transition: none; }
  .ap-eq i { animation: none; }
}

/* ---------- article pages (/journal/, /guide/) ---------- */

.page { max-width: 880px; margin-inline: auto; padding: clamp(2.5rem, 7vh, 5rem) var(--gutter) 4rem; }
.page-kicker { color: var(--ink-3); }
.page h1 { font-weight: 700; font-size: clamp(2.6rem, 7vw, 4.5rem); line-height: .95; margin: .3em 0 .5em; }
.page h1 .dot { color: var(--orange); }
.page-lede { color: var(--ink-2); font-size: 1.0625rem; max-width: 52ch; }
.page-toc { display: flex; gap: 1.4rem; flex-wrap: wrap; margin-top: 2rem; padding-top: 1.2rem; border-top: 1px solid var(--line); }
.page-toc a { color: var(--ink-3); text-decoration: none; border-bottom: 2px solid transparent; padding-bottom: .2em; }
.page-toc a:hover { color: var(--ink); border-color: var(--graphite); }

.article { padding-top: clamp(2.5rem, 6vh, 4rem); margin-top: clamp(2.5rem, 6vh, 4rem); border-top: 1px solid var(--graphite); }
.article-head { display: flex; align-items: baseline; gap: 1rem; margin-bottom: 1rem; }
.article-head .mono { color: var(--ink-3); }
.article h2 { font-size: clamp(1.9rem, 4.5vw, 2.8rem); line-height: .98; max-width: 18ch; margin-bottom: 1.4rem; }
.article p { color: var(--ink-2); margin-bottom: 1rem; max-width: 62ch; }
.article strong { color: var(--ink); font-weight: 620; }
.article .arith {
  font-family: var(--font-mono); font-weight: 400; font-size: .8125rem; line-height: 1.9;
  border: 1px solid var(--line); padding: 1.1rem 1.3rem; margin: 1.4rem 0;
  overflow-x: auto; white-space: pre; color: var(--ink);
}
.article .sources {
  margin-top: 1.8rem; padding-top: 1rem; border-top: 1px dashed var(--ash);
  font-family: var(--font-mono); font-weight: 400; font-size: .6875rem;
  letter-spacing: .01em; line-height: 1.7; color: var(--ink-3);
}
.article .sources li { margin-bottom: .35rem; }
.article .sources ul { list-style: none; padding: 0; margin: .5rem 0 0; }
.article .sources a { color: inherit; overflow-wrap: anywhere; }
.article .sources a:hover { color: var(--ink); }
.article .src-label { font-weight: 500; letter-spacing: .12em; text-transform: uppercase; }

/* guide specifics */
.guide-spec {
  display: grid; grid-template-columns: max-content 1fr; gap: .7rem 1.6rem;
  border: 1px solid var(--line); padding: 1.3rem 1.4rem; margin: 1.4rem 0; font-size: .9375rem;
}
.guide-spec dt { font-family: var(--font-mono); font-weight: 500; font-size: .6875rem; letter-spacing: .12em; color: var(--ink-3); text-transform: uppercase; padding-top: .2em; }
.guide-spec dd { margin: 0; color: var(--ink-2); }
.guide-spec code, .article code { font-family: var(--font-mono); font-size: .85em; background: #ECEAE5; padding: .1em .35em; }
.swatches { display: flex; gap: 1px; border: 1px solid var(--line); margin: 1.4rem 0; flex-wrap: wrap; }
.swatch { flex: 1 1 100px; min-width: 100px; }
.swatch .sw { height: 64px; }
.swatch .sw-meta { font-family: var(--font-mono); font-weight: 400; font-size: .625rem; letter-spacing: .06em; color: var(--ink-3); padding: .5rem .6rem; text-transform: uppercase; line-height: 1.6; }
.pass { border-left: 3px solid var(--lime); background: #F1EFEA; padding: 1.1rem 1.3rem; margin: 1.2rem 0; }
.pass h3 { font-size: 1.25rem; margin-bottom: .5rem; }
.pass p, .pass li { color: var(--ink-2); font-size: .9375rem; }
.pass ul { padding-left: 1.2rem; margin: .5rem 0; display: grid; gap: .35rem; }
@media (max-width: 620px) { .guide-spec { grid-template-columns: 1fr; gap: .2rem; } .guide-spec dt { margin-top: .8rem; } }