/* ============================================================
     VIRGIL product site
     Brand   : the guided path. A pin, a night, a way through.
     Palette : paper and night indigo, with three register colours
               that carry the depth model wherever it is shown
     Type    : system serif display / grotesque body / mono metadata
     Motif   : the ruled margin, and the short rule before a caption
     ============================================================ */

:root {
  color-scheme: light;

  /* Whiteboard: the same marker-on-board room as the product. */
  --ground:      #DCD6C9;
  --surface:     #FCFCFA;
  --surface-2:   #F7F5F0;
  --ink:         #16191C;
  --ink-2:       #394149;
  --muted:       #5D6570;
  --line:        #C8C2B4;
  --line-strong: #A9A398;

  --accent:      #1F6F5C;
  --accent-ink:  #195947;
  --accent-wash: rgba(31, 111, 92, 0.10);
  --on-accent:   #FFFFFF;

  --reg-fluent:   #2F5FA8;
  --reg-building: #1F6F5C;
  --reg-nothing:  #8A5A1F;

  --st-proven:  #177A52;
  --st-partial: #8A5A1F;
  --st-not:     #A63D57;

  --board-frame: #B0ACA2;
  --board-edge: #CFCABF;
  --board-shadow: 0 14px 30px -12px rgba(40, 34, 24, 0.35), 0 2px 6px rgba(40, 34, 24, 0.14), inset 0 1px 0 rgba(255, 255, 255, 0.9);
  --board-texture: radial-gradient(120% 70% at 12% -10%, rgba(28, 40, 52, 0.045), transparent 62%), radial-gradient(90% 55% at 88% 112%, rgba(28, 40, 52, 0.035), transparent 58%);
  --board-line: rgba(26, 34, 44, 0.16);
  --board-muted: #6A6459;
  --board-accent: #1F6F5C;

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --measure: 62ch;
  --shell: 1120px;
  --wide: 1320px;

  --s-1: 0.5rem;
  --s-2: 0.875rem;
  --s-3: 1.5rem;
  --s-4: 2.5rem;
  --s-5: 4rem;
  --s-6: 6.5rem;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --ground:      #1A1613;
    --surface:     #1E2D26;
    --surface-2:   #1E1A16;
    --ink:         #ECEEF0;
    --ink-2:       #C5CBC7;
    --muted:       #99A09A;
    --line:        #3B352E;
    --line-strong: #615547;

    --accent:      #5FBFA4;
    --accent-ink:  #8BD5C0;
    --accent-wash: rgba(95, 191, 164, 0.13);
    --on-accent:   #10201B;

    --reg-fluent:   #7BA7E8;
    --reg-building: #5FBFA4;
    --reg-nothing:  #D2A15E;

    --st-proven:  #5FBFA4;
    --st-partial: #D2A15E;
    --st-not:     #F2809B;

    --board-frame: #4D3B28;
    --board-edge: #0A0F0D;
    --board-shadow: 0 18px 38px -14px rgba(0, 0, 0, 0.7), 0 2px 8px rgba(0, 0, 0, 0.45), inset 0 0 90px rgba(0, 0, 0, 0.38);
    --board-texture: radial-gradient(110% 70% at 18% -8%, rgba(236, 240, 228, 0.055), transparent 62%), radial-gradient(80% 50% at 82% 108%, rgba(236, 240, 228, 0.04), transparent 58%), linear-gradient(96deg, rgba(236, 240, 228, 0.03) 8%, transparent 34%);
    --board-line: rgba(236, 240, 228, 0.16);
    --board-muted: #A4B0A6;
    --board-accent: #5FBFA4;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --ground:      #1A1613;
  --surface:     #1E2D26;
  --surface-2:   #1E1A16;
  --ink:         #ECEEF0;
  --ink-2:       #C5CBC7;
  --muted:       #99A09A;
  --line:        #3B352E;
  --line-strong: #615547;

  --accent:      #5FBFA4;
  --accent-ink:  #8BD5C0;
  --accent-wash: rgba(95, 191, 164, 0.13);
  --on-accent:   #10201B;

  --reg-fluent:   #7BA7E8;
  --reg-building: #5FBFA4;
  --reg-nothing:  #D2A15E;

  --st-proven:  #5FBFA4;
  --st-partial: #D2A15E;
  --st-not:     #F2809B;

  --board-frame: #4D3B28;
  --board-edge: #0A0F0D;
  --board-shadow: 0 18px 38px -14px rgba(0, 0, 0, 0.7), 0 2px 8px rgba(0, 0, 0, 0.45), inset 0 0 90px rgba(0, 0, 0, 0.38);
  --board-texture: radial-gradient(110% 70% at 18% -8%, rgba(236, 240, 228, 0.055), transparent 62%), radial-gradient(80% 50% at 82% 108%, rgba(236, 240, 228, 0.04), transparent 58%), linear-gradient(96deg, rgba(236, 240, 228, 0.03) 8%, transparent 34%);
  --board-line: rgba(236, 240, 228, 0.16);
  --board-muted: #A4B0A6;
  --board-accent: #5FBFA4;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  transform: translateY(-180%);
  background: var(--accent);
  color: var(--on-accent);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.7rem 1rem;
  text-decoration: none;
}

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

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

/* ---------- shared type ---------- */

.eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0;
}

.lede {
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  line-height: 1.55;
  color: var(--ink-2);
  max-width: var(--measure);
  margin: 0;
}

.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 2.5rem);
}

.shell--wide { max-width: var(--wide); }

h1, h2, h3 { margin: 0; text-wrap: balance; font-weight: 500; }

.display {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.03;
  font-size: clamp(2.7rem, 6.4vw, 4.6rem);
}

.display em { font-style: normal; color: var(--accent-ink); }

.h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.9rem, 3.6vw, 2.75rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.3rem, 2.2vw, 1.65rem);
  line-height: 1.2;
}

/* ---------- masthead ---------- */

.masthead {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: var(--ground);
}

.announcement {
  background: var(--accent);
  color: var(--on-accent);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.055em;
  line-height: 1.45;
  text-align: center;
  text-transform: uppercase;
}

.announcement .shell { padding-block: 0.48rem; }
.announcement a { text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
.announcement a:hover { text-decoration-thickness: 2px; }

.masthead__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-3);
  padding-block: var(--s-2);
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--serif);
  font-size: 1.15rem;
  letter-spacing: 0.01em;
  text-decoration: none;
  color: var(--ink);
}

.wordmark img {
  width: 30px;
  height: 30px;
  display: block;
  flex: none;
  box-sizing: border-box;
  padding: 2px;
  border-radius: 50%;
}

:root[data-theme="dark"] .wordmark img {
  background: #E7DEC8;
  box-shadow: 0 0 0 1px rgba(210, 161, 94, 0.7), 0 2px 8px rgba(0, 0, 0, 0.32);
}

.navlinks {
  display: flex;
  gap: var(--s-3);
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.navlinks a {
  color: var(--muted);
  text-decoration: none;
  padding-block: 0.2rem;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.navlinks a:hover { color: var(--ink); border-bottom-color: var(--accent); }
.navlinks a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }

.theme-picker {
  display: inline-flex;
  align-items: center;
  gap: 0;
  padding-left: 0.7rem;
  border-left: 1px solid var(--line);
}

.theme-picker__label {
  margin-right: 0.5rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.theme-choice {
  appearance: none;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  line-height: 1.2;
  padding: 0.4rem 0.65rem;
  text-transform: uppercase;
}

.theme-choice + .theme-choice { margin-left: -1px; }
.theme-choice:first-of-type { border-radius: 999px 0 0 999px; }
.theme-choice:last-child { border-radius: 0 999px 999px 0; }
.theme-choice:hover { position: relative; border-color: var(--accent); color: var(--ink); }
.theme-choice[aria-pressed="true"] {
  position: relative;
  border-color: var(--accent);
  background: var(--accent);
  color: var(--on-accent);
}

.masthead__mobile { display: none; }

@media (max-width: 760px) {
  .masthead__row {
    align-items: center;
    flex-wrap: nowrap;
    gap: 0.75rem;
    padding-block: 0.55rem;
  }

  .announcement { font-size: 0.61rem; letter-spacing: 0.035em; }
  .announcement .shell { padding-block: 0.4rem; }

  .navlinks { display: none; }

  .masthead__mobile {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }

  .navmenu summary {
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.55rem 0.8rem;
    border: 1px solid var(--line-strong);
    color: var(--ink);
    background: var(--ground);
    cursor: pointer;
    list-style: none;
  }

  .navmenu { position: relative; }
  .navmenu summary::-webkit-details-marker { display: none; }
  .navmenu[open] summary { border-color: var(--accent); }

  .navmenu__panel {
    position: absolute;
    top: calc(100% + 0.55rem);
    right: 0;
    width: min(18rem, calc(100vw - 2.5rem));
    display: grid;
    padding: 0.55rem;
    border: 1px solid var(--line-strong);
    background: var(--ground);
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.24);
    z-index: 30;
  }

  .navmenu__panel a {
    min-height: 44px;
    display: flex;
    align-items: center;
    padding: 0.65rem 0.75rem;
    color: var(--ink-2);
    text-decoration: none;
    border-bottom: 1px solid var(--line);
  }

  .navmenu__panel a:last-child { border-bottom: 0; }

  .navmenu__panel .theme-picker {
    justify-self: stretch;
    justify-content: flex-start;
    margin: 0.75rem;
    padding: 0;
    border-left: 0;
  }

  .navmenu__panel .theme-picker__label {
    margin-right: auto;
  }
}

/* ---------- sections ---------- */

.band {
  padding-block: var(--s-6);
  border-bottom: 1px solid var(--line);
}

section[id] { scroll-margin-top: 7rem; }

.band--tight { padding-block: var(--s-5); }
.band--quiet { background: var(--surface-2); }

.band__head {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  margin-bottom: var(--s-4);
}

.band__head--split {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  column-gap: var(--s-5);
  row-gap: var(--s-2);
  align-items: end;
}

.band__head--split .eyebrow { grid-column: 1; }
.band__head--split .h2 { grid-column: 1; }
.band__head--split .lede { grid-column: 2; grid-row: 1 / span 2; max-width: 46ch; }

@media (max-width: 900px) {
  .band__head--split { display: flex; flex-direction: column; }
  .band__head--split .lede { max-width: var(--measure); }
}

/* ---------- hero: the learner's chosen board ---------- */

.hero {
  --hero-ink: var(--ink);
  --hero-muted: var(--muted);
  --hero-line: var(--board-line);
  position: relative;
  overflow: hidden;
  padding-block: var(--s-5) var(--s-6);
  color: var(--hero-ink);
  border-bottom: 1px solid var(--line);
  background: var(--board-texture), var(--surface);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.24;
  background-image:
    linear-gradient(var(--board-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--board-line) 1px, transparent 1px);
  background-size: 68px 68px;
  mask-image: linear-gradient(180deg, #000, transparent 82%);
}

.hero .shell { position: relative; z-index: 1; }

.hero .eyebrow { color: var(--accent-ink); }
.hero .display em { color: var(--accent-ink); }
.hero .lede { color: var(--ink-2); max-width: 56ch; margin-top: 1.3rem; }
.hero .display { max-width: 17ch; }

.hero__lead {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(15rem, 4fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
}

.hero__mark {
  width: min(100%, 27rem);
  margin: 0 auto;
  filter: drop-shadow(0 1.5rem 3rem rgba(0, 0, 0, 0.28));
}

.hero__mark img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid rgba(247, 244, 236, 0.2);
}

.product-board {
  position: relative;
  width: min(100%, 31rem);
  margin: 0 auto;
  padding: 1rem;
  border: 10px solid var(--board-frame);
  border-radius: 4px;
  background: var(--board-texture), var(--surface);
  color: var(--ink);
  box-shadow: var(--board-shadow);
  text-align: left;
}

.product-board::after {
  content: "";
  position: absolute;
  inset: 0.35rem;
  border: 1px solid var(--board-line);
  pointer-events: none;
}

.product-board__proof {
  position: relative;
  z-index: 1;
  margin: 0 0 0.7rem;
  color: var(--board-accent);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.product-board__top {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--board-line);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.product-board__top img {
  width: 2.4rem;
  height: 2.4rem;
  box-sizing: border-box;
  object-fit: contain;
  padding: 0.2rem;
  border: 0;
  border-radius: 50%;
}

:root[data-theme="dark"] .product-board__top img {
  background: #E7DEC8;
  box-shadow: 0 0 0 1px rgba(210, 161, 94, 0.7);
}

.product-board__time {
  margin-left: auto;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--board-accent);
  border-radius: 999px;
  color: var(--board-accent);
}

.product-board__lesson,
.product-board__after { position: relative; z-index: 1; }

.product-board__lesson { padding: 1.2rem 0 1.1rem; }

.product-board__kicker,
.product-board__after > span {
  display: block;
  color: var(--board-accent);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.product-board__lesson strong {
  display: block;
  margin-top: 0.55rem;
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2.4vw, 1.8rem);
  font-weight: 500;
  line-height: 1.16;
}

.product-board__lesson p,
.product-board__after p {
  margin: 0.65rem 0 0;
  color: var(--board-muted);
  font-size: 0.8rem;
  line-height: 1.45;
}

.product-board__start {
  display: inline-flex;
  margin-top: 0.9rem;
  padding: 0.45rem 0.8rem;
  border-radius: 3px;
  background: var(--accent);
  color: var(--on-accent);
  font-size: 0.75rem;
  font-weight: 700;
}

.product-board__after {
  padding-top: 0.95rem;
  border-top: 1px solid var(--board-line);
}

.hero .actions { margin-top: 1.4rem; }
.hero .btn--ghost { color: var(--hero-ink); border-color: var(--line-strong); }
.hero .btn--ghost:hover { border-color: var(--ink); }

.hero__promises {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: var(--s-5) 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--hero-line);
}

.hero__promises div { padding-right: 1rem; }
.hero__promises div + div { padding-left: 1rem; border-left: 1px solid var(--hero-line); }

.hero__promises dt {
  color: var(--hero-ink);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero__promises dd { margin: 0.35rem 0 0; color: var(--hero-muted); font-size: 0.85rem; line-height: 1.4; }

@media (max-width: 700px) {
  .hero__lead { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
  .hero__mark { grid-row: 1; width: min(44vw, 11rem); margin-inline: auto 0; }
  .product-board { grid-row: auto; width: 100%; margin-top: 0.75rem; border-width: 8px; }
  .hero__promises { grid-template-columns: minmax(0, 1fr); gap: var(--s-2); }
  .hero__promises div + div { padding-left: 0; border-left: 0; padding-top: var(--s-2); border-top: 1px solid var(--hero-line); }
}

/* ---------- homepage product story ---------- */

.moment-flow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s-3);
}

.moment-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: var(--s-3);
  border: 1px solid var(--line);
  background: var(--surface);
}

.moment-card__n {
  margin-bottom: var(--s-2);
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.moment-card__visual {
  min-height: 12rem;
  margin-bottom: var(--s-3);
  padding: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid var(--board-line);
  background: var(--board-texture), var(--surface);
  color: var(--ink);
}

.moment-card h3 { margin-bottom: 0.65rem; }
.moment-card > p { margin: 0; color: var(--ink-2); font-size: 0.94rem; line-height: 1.55; }

.mini-toast,
.mini-answer,
.mini-session {
  width: 100%;
  display: grid;
  gap: 0.45rem;
  padding: 1rem;
  border: 1px solid var(--board-line);
  background: var(--surface-2);
  box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.18);
}

.mini-toast { border-left: 3px solid var(--board-accent); }
.mini-toast::before { content: "✓"; color: var(--board-accent); font-weight: 700; }
.mini-toast small,
.mini-answer small,
.mini-session small { color: var(--board-muted); font-size: 0.72rem; line-height: 1.4; }

.mini-answer { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.mini-answer b,
.mini-answer small,
.mini-answer__question { grid-column: 1 / -1; }
.mini-answer b,
.mini-session small { color: var(--board-accent); font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.08em; text-transform: uppercase; }
.mini-answer__question { font-family: var(--serif); font-size: 1rem; line-height: 1.25; }
.mini-answer i,
.mini-session i {
  padding: 0.4rem 0.5rem;
  border: 1px solid var(--board-line);
  color: var(--ink);
  font-size: 0.65rem;
  font-style: normal;
  text-align: center;
}

.mini-session strong { font-family: var(--serif); font-size: 1.25rem; font-weight: 500; line-height: 1.2; }
.mini-session__why { color: var(--board-muted); font-size: 0.72rem; line-height: 1.4; }
.mini-session i { justify-self: start; border-color: var(--accent); background: var(--accent); color: var(--on-accent); font-weight: 700; }

.today-proof {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(20rem, 4fr);
  align-items: center;
  gap: clamp(2.5rem, 7vw, 6rem);
}

.today-proof__copy { display: flex; flex-direction: column; gap: var(--s-2); }

.outcome-list {
  display: grid;
  gap: 0;
  margin: var(--s-3) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.outcome-list li {
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-2);
  font-size: 0.92rem;
  line-height: 1.5;
}

.outcome-list b { color: var(--ink); font-weight: 600; }

.today-board {
  position: relative;
  margin: 0;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 10px solid var(--board-frame);
  border-radius: 4px;
  background: var(--board-texture), var(--surface);
  color: var(--ink);
  box-shadow: var(--board-shadow);
}

.today-board__head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; }
.today-board__head span { font-family: var(--serif); font-size: 1.65rem; }
.today-board__head small,
.today-board__why { color: var(--board-muted); font-size: 0.7rem; }
.today-board__times { display: flex; gap: 0.45rem; margin: 1rem 0; }
.today-board__times span {
  padding: 0.3rem 0.55rem;
  border: 1px solid var(--board-line);
  border-radius: 999px;
  color: var(--board-muted);
  font-family: var(--mono);
  font-size: 0.58rem;
  text-transform: uppercase;
}
.today-board__times .is-active { border-color: var(--board-accent); color: var(--board-accent); }

.today-board__card { padding: 1.15rem; border: 1px solid var(--board-line); background: var(--surface-2); }
.today-board__card small { display: block; color: var(--board-accent); font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.09em; text-transform: uppercase; }
.today-board__card strong { display: block; margin-top: 0.5rem; font-family: var(--serif); font-size: 1.45rem; font-weight: 500; line-height: 1.2; }
.today-board__card p { margin: 0.65rem 0; color: var(--board-muted); font-size: 0.78rem; line-height: 1.45; }
.today-board__card > span { display: inline-flex; margin-top: 0.35rem; padding: 0.45rem 0.7rem; border-radius: 3px; background: var(--accent); color: var(--on-accent); font-size: 0.68rem; font-weight: 700; }
.today-board__why { margin: 1rem 0 0; line-height: 1.45; }
.today-board__why b { color: var(--ink); }

.signal-loop {
  display: grid;
  grid-template-columns: repeat(5, auto);
  align-items: stretch;
  justify-content: stretch;
  gap: var(--s-2);
}

.signal-card {
  min-width: 0;
  padding: var(--s-3);
  border: 1px solid var(--line);
  border-top: 3px solid var(--reg-building);
  background: var(--surface);
}

.signal-card--result { border-top-color: var(--reg-nothing); }
.signal-card--next { border-top-color: var(--accent); }
.signal-card span { display: block; margin-bottom: 1.1rem; color: var(--muted); font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; }
.signal-card strong { display: block; font-family: var(--serif); font-size: 1.35rem; font-weight: 500; line-height: 1.25; }
.signal-card small { display: block; margin-top: 0.5rem; color: var(--muted); }
.signal-arrow { align-self: center; color: var(--accent-ink); font-size: 1.4rem; }
.signal-caption { max-width: var(--measure); margin: var(--s-3) 0 0; color: var(--muted); font-size: 0.88rem; }

.band--dark {
  background: var(--surface);
  color: var(--ink);
}

.band--dark .eyebrow { color: var(--accent-ink); }

.proof-pair { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 4fr); gap: var(--s-3); }
.choice-proof,
.verification-proof { margin: 0; padding: clamp(1.5rem, 4vw, 2.5rem); border: 1px solid var(--line); background: var(--surface-2); }
.choice-proof { border-left: 3px solid var(--accent); }
.choice-proof > span,
.verification-proof > span { color: var(--accent-ink); font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; }
.choice-proof p { margin: 1rem 0; color: var(--ink-2); font-family: var(--serif); font-size: clamp(1.25rem, 2.5vw, 1.7rem); line-height: 1.38; }
.choice-proof strong { display: block; color: var(--accent-ink); font-family: var(--serif); font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 500; }
.choice-proof small { display: block; margin-top: 1rem; color: var(--muted); line-height: 1.5; }
.verification-proof { display: flex; flex-direction: column; }
.verification-proof h3 { margin: 0.75rem 0; }
.verification-proof p { margin: 0; color: var(--ink-2); }
.verification-proof__rule { margin-top: auto !important; padding-top: var(--s-3); color: var(--accent-ink) !important; font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.07em; text-transform: uppercase; }
.proof-actions { margin-top: var(--s-3); }
.band--dark .btn--ghost { color: var(--ink); border-color: var(--line-strong); }

.commitments { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; border: 1px solid var(--line); background: var(--line); }
.commitments article { padding: var(--s-3); background: var(--ground); }
.commitments article > span { color: var(--accent-ink); font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.12em; }
.commitments h3 { margin: var(--s-2) 0; }
.commitments p { margin: 0; color: var(--ink-2); font-size: 0.92rem; line-height: 1.55; }

.state-close .shell { display: flex; flex-direction: column; align-items: flex-start; gap: var(--s-2); }
.state-close .h2 { max-width: 22ch; }
.state-close .actions { margin-top: var(--s-2); }
.state-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  width: 100%;
  gap: var(--s-3);
  margin-top: var(--s-3);
}
.state-card {
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--line);
  background: var(--surface);
}
.state-card--working { border-top: 3px solid var(--st-proven); }
.state-card--building { border-top: 3px solid var(--st-partial); }
.state-card > span {
  display: block;
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.state-card h3 { margin-top: 0.6rem; }
.state-card ul {
  display: grid;
  gap: 0.55rem;
  margin: 1rem 0 0;
  padding-left: 1.1rem;
  color: var(--ink-2);
  font-size: 0.9rem;
  line-height: 1.45;
}
.build-strip { display: flex; flex-wrap: wrap; gap: 0; margin: var(--s-3) 0 0; border-top: 1px solid var(--line); color: var(--muted); font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; }
.build-strip span { margin-top: var(--s-2); padding-inline: 0.8rem; border-left: 1px solid var(--line-strong); }
.build-strip span:first-child { padding-left: 0; border-left: 0; }
.build-strip .build-strip__label { flex: 1 0 100%; padding-left: 0; border-left: 0; color: var(--ink-2); font-weight: 700; }
.build-strip .build-strip__label + span { padding-left: 0; border-left: 0; }

@media (max-width: 900px) {
  .moment-flow,
  .commitments { grid-template-columns: minmax(0, 1fr); }
  .moment-card { display: grid; grid-template-columns: minmax(12rem, 2fr) minmax(0, 3fr); column-gap: var(--s-3); }
  .moment-card__n { grid-column: 1 / -1; }
  .moment-card__visual { grid-row: 2 / span 2; margin: 0; }
  .today-proof { grid-template-columns: minmax(0, 1fr); }
  .today-board { width: min(100%, 34rem); }
  .proof-pair { grid-template-columns: minmax(0, 1fr); }
  .state-grid { grid-template-columns: minmax(0, 1fr); }
  .verification-proof__rule { margin-top: var(--s-3) !important; }
}

@media (max-width: 700px) {
  .moment-card { display: flex; }
  .moment-card__visual { min-height: 10rem; margin-bottom: var(--s-3); }
  .today-board { border-width: 8px; }
  .signal-loop { grid-template-columns: minmax(0, 1fr); }
  .signal-arrow { transform: rotate(90deg); justify-self: center; }
  .build-strip span { flex: 1 1 50%; padding-left: 0; border-left: 0; }
}

/* ---------- buttons ---------- */

.actions { display: flex; flex-wrap: wrap; gap: var(--s-2); align-items: center; }

.btn {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.8rem 1.4rem;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--on-accent);
  transition: transform 0.12s ease, opacity 0.15s ease;
}

.btn:hover { opacity: 0.88; }
.btn:active { transform: translateY(1px); }

.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn--ghost:hover { border-color: var(--ink); opacity: 1; }

.chip {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.3rem 0.62rem;
  border: 1px solid var(--line-strong);
  color: var(--muted);
  white-space: nowrap;
}

.chip--live { border-color: var(--accent); color: var(--accent-ink); background: var(--accent-wash); }

.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }

/* ---------- the three registers ---------- */

.registers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: var(--s-3);
}

.reg {
  border: 1px solid var(--line);
  background: var(--surface);
  padding: var(--s-3);
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.reg__bar { height: 3px; width: 100%; background: currentColor; }
.reg--fluent   { color: var(--reg-fluent); }
.reg--building { color: var(--reg-building); }
.reg--nothing  { color: var(--reg-nothing); }

.reg__name {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink);
}

.reg__note { font-size: 0.94rem; color: var(--ink-2); line-height: 1.5; }
.reg__when { font-family: var(--mono); font-size: 0.72rem; color: var(--muted); }

/* ---------- diagrams ---------- */

.plate { margin: 0; display: flex; flex-direction: column; gap: var(--s-2); }

.diagram-hint {
  display: none;
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.plate__frame {
  border: 1px solid var(--line);
  background: var(--surface);
  padding: clamp(1rem, 3vw, 2rem);
  overflow-x: auto;
}

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

/* Diagrams keep a floor width and scroll inside their own frame below it,
   rather than shrinking their type until it cannot be read. */
.diagram { width: 100%; min-width: 600px; height: auto; display: block; }

.diagram text {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.d-box    { fill: var(--surface); stroke: var(--line-strong); stroke-width: 1; }
.d-box--q { fill: var(--surface-2); stroke: var(--line-strong); stroke-width: 1; }
.d-label  { fill: var(--muted); }
.d-name   { fill: var(--ink); font-size: 14px; text-transform: none; letter-spacing: 0; }
.d-sub    { fill: var(--muted); font-size: 11px; text-transform: none; letter-spacing: 0; }
.d-flow   { stroke: var(--accent); stroke-width: 1.5; fill: none; }
.d-arrow  { fill: var(--accent); }
.d-accent { fill: var(--accent-ink); }
.d-rule   { stroke: var(--line); stroke-width: 1; }

.plate figcaption {
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--ink-2);
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
}

.plate figcaption::before {
  content: "";
  flex: none;
  width: 18px;
  height: 1px;
  background: var(--accent);
  transform: translateY(-0.35em);
}

/* ---------- engineering map ---------- */

.engineering-map {
  margin: var(--s-4) 0;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  box-shadow: var(--board-shadow);
}

.engineering-map__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--s-3);
  padding: var(--s-3);
  border-bottom: 1px solid var(--line-strong);
  background: var(--board-texture), var(--surface);
}

.engineering-map__head strong {
  display: block;
  margin-top: 0.35rem;
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2.5vw, 1.8rem);
  font-weight: 500;
  line-height: 1.2;
}

.engineering-map__facts { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 0.4rem; }
.engineering-map__facts span {
  padding: 0.3rem 0.55rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.engineering-lane {
  display: grid;
  grid-template-columns: 7.5rem minmax(0, 1fr);
  gap: var(--s-3);
  padding: var(--s-3);
  border-bottom: 1px solid var(--line);
}

.engineering-lane__label { display: flex; flex-direction: column; align-items: flex-start; }
.engineering-lane__label > span { color: var(--accent-ink); font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.12em; }
.engineering-lane__label strong { margin-top: 0.35rem; font-size: 0.78rem; line-height: 1.3; text-transform: uppercase; }
.engineering-lane__label small { margin-top: 0.4rem; color: var(--muted); font-size: 0.65rem; line-height: 1.4; }

.engineering-flow { display: flex; align-items: stretch; gap: 0.5rem; min-width: 0; }
.engineering-flow--trigger { margin-bottom: var(--s-2); }
.engineering-node {
  flex: 1 1 0;
  min-width: 0;
  padding: 0.8rem;
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  background: var(--ground);
}

.engineering-node > span {
  display: block;
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 0.56rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.engineering-node strong { display: block; margin-top: 0.4rem; font-size: 0.82rem; line-height: 1.3; }
.engineering-node small { display: block; margin-top: 0.4rem; color: var(--muted); font-size: 0.63rem; line-height: 1.4; }
.engineering-node--surface { border-top-color: var(--reg-fluent); }
.engineering-node--cloud { border-top-color: var(--reg-nothing); }
.engineering-node--data { border-top-color: var(--reg-building); }
.engineering-node--policy { border-top-color: var(--st-partial); }
.engineering-node--gate { border-top-color: var(--st-not); }
.engineering-arrow { align-self: center; flex: none; color: var(--accent-ink); font-family: var(--mono); font-size: 0.9rem; }

.engineering-pipeline-wrap { max-width: 100%; overflow-x: auto; padding-bottom: 0.25rem; }
.engineering-pipeline-wrap:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.engineering-pipeline {
  min-width: 40rem;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.engineering-pipeline > div { min-width: 0; padding: 0.65rem; background: var(--surface-2); }
.engineering-pipeline span { color: var(--accent-ink); font-family: var(--mono); font-size: 0.54rem; letter-spacing: 0.08em; }
.engineering-pipeline strong { display: block; margin-top: 0.25rem; font-size: 0.72rem; line-height: 1.2; }
.engineering-pipeline small { display: block; margin-top: 0.25rem; color: var(--muted); font-size: 0.58rem; line-height: 1.3; }
.engineering-pipeline .is-policy { box-shadow: inset 0 3px 0 var(--st-partial); }
.engineering-pipeline .is-gate { box-shadow: inset 0 3px 0 var(--st-not); }

.engineering-map figcaption {
  padding: var(--s-2) var(--s-3);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.62rem;
  line-height: 1.55;
}

.engineering-laws {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: var(--s-3) 0;
  border: 1px solid var(--line);
  background: var(--line);
}

.engineering-laws article { padding: var(--s-3); background: var(--surface); }
.engineering-laws span { color: var(--accent-ink); font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.09em; text-transform: uppercase; }
.engineering-laws strong { display: block; margin-top: 0.5rem; font-family: var(--serif); font-size: 1.2rem; font-weight: 500; line-height: 1.25; }
.engineering-laws p { margin: 0.6rem 0 0; color: var(--ink-2); font-size: 0.85rem; line-height: 1.5; }

@media (max-width: 760px) {
  .engineering-map__head { flex-direction: column; }
  .engineering-map__facts { justify-content: flex-start; }
  .engineering-lane { grid-template-columns: minmax(0, 1fr); }
  .engineering-lane__label { display: grid; grid-template-columns: auto 1fr; column-gap: 0.6rem; }
  .engineering-lane__label small { grid-column: 2; }
  .engineering-flow { flex-direction: column; }
  .engineering-arrow { transform: rotate(90deg); }
  .engineering-flow .engineering-node { width: 100%; }
  .engineering-laws { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- fact grid ---------- */

.facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.fact { background: var(--ground); padding: var(--s-3); display: flex; flex-direction: column; gap: 0.4rem; }
.fact__n { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.14em; color: var(--accent-ink); }
.fact__t { font-size: 1.02rem; font-weight: 500; line-height: 1.3; }
.fact__s { font-size: 0.9rem; color: var(--muted); line-height: 1.45; }

/* ---------- pull quote ---------- */

.pull {
  margin: var(--s-3) 0;
  padding: var(--s-3) var(--s-4);
  border-left: 2px solid var(--accent);
  background: var(--surface);
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  line-height: 1.45;
  color: var(--ink);
}

.pull p { margin: 0; }
.pull p + p { margin-top: var(--s-2); }

.pull cite {
  display: block;
  margin-top: var(--s-2);
  font-family: var(--mono);
  font-size: 0.7rem;
  font-style: normal;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- status board ---------- */

.board { border: 1px solid var(--line); background: var(--surface); }

.board__row {
  display: grid;
  grid-template-columns: 9.5rem minmax(0, 1fr);
  gap: var(--s-3);
  padding: var(--s-3);
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.board__row:last-child { border-bottom: 0; }

.state {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  border: 1px solid currentColor;
  padding: 0.25rem 0.5rem;
  justify-self: start;
  white-space: nowrap;
}

.state--proven  { color: var(--st-proven); }
.state--partial { color: var(--st-partial); }
.state--not     { color: var(--st-not); }

.board__what { font-size: 1rem; color: var(--ink); line-height: 1.45; }
.board__why { margin: 0.35rem 0 0; font-size: 0.92rem; color: var(--muted); line-height: 1.5; }

@media (max-width: 640px) {
  .board__row { grid-template-columns: minmax(0, 1fr); gap: var(--s-1); }
  .state {
    max-width: 100%;
    white-space: normal;
    overflow-wrap: anywhere;
  }
}

/* ---------- documentation pages ---------- */

.doc { max-width: 74ch; min-width: 0; }

.doc h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.35rem, 2.2vw, 1.7rem);
  line-height: 1.2;
  margin-top: var(--s-5);
}

.doc h4 { font-family: var(--sans); font-size: 1rem; font-weight: 600; margin-top: var(--s-4); }

.doc p, .doc li { color: var(--ink-2); }
.doc p { margin: var(--s-2) 0; }
.doc ul, .doc ol { padding-left: 1.2rem; margin: var(--s-2) 0; }
.doc li { margin-block: 0.3rem; }
.doc li::marker { color: var(--muted); }
.doc a { color: var(--accent-ink); text-decoration: underline; text-underline-offset: 2px; }

.doc section { scroll-margin-top: 6rem; min-width: 0; }
.doc > section + section { margin-top: var(--s-6); }
.doc > section > h2:first-child { margin-bottom: var(--s-2); }

/* Reading column plus a sticky contents rail. The rail is first in the
   markup so it is first in the tab order and first on a narrow screen. */
.docwrap {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  column-gap: var(--s-6);
  align-items: start;
}

.toc {
  position: sticky;
  top: 5.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  border-right: 1px solid var(--line);
  padding-right: var(--s-3);
}

.toc__t { letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-2); margin-bottom: 0.2rem; }
.toc a { color: var(--muted); text-decoration: none; line-height: 1.4; }
.toc a:hover { color: var(--accent-ink); }

@media (max-width: 980px) {
  .docwrap { grid-template-columns: minmax(0, 1fr); }
  .toc {
    position: static;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
    gap: 0.65rem 1rem;
    overflow: visible;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 0 0 var(--s-3);
    margin-bottom: var(--s-4);
    white-space: normal;
  }
  .toc__t { grid-column: 1 / -1; }
  .toc a { min-width: 0; }
}

.pagehead { display: flex; flex-direction: column; gap: var(--s-2); margin-bottom: var(--s-5); }
.crumb { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.crumb a { color: var(--muted); text-decoration: none; border-bottom: 1px solid var(--line-strong); }
.crumb a:hover { color: var(--ink); }

code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--surface-2);
  padding: 0.1em 0.35em;
  border-radius: 2px;
}

.code {
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.7;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent);
  padding: 0.9rem 1.1rem;
  margin: var(--s-3) 0;
  color: var(--ink);
  overflow-x: auto;
  white-space: pre;
}

.code code { background: none; padding: 0; font-size: inherit; }

.note {
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent);
  background: var(--surface);
  padding: var(--s-3);
  margin: var(--s-3) 0;
}

.note--warn { border-left-color: var(--st-not); }
.note--limit { border-left-color: var(--st-partial); }

.note__t {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  display: block;
  margin-bottom: 0.4rem;
}

.note p:first-child { margin-top: 0; }
.note p:last-child { margin-bottom: 0; }

.spec { width: 100%; border-collapse: collapse; margin: var(--s-3) 0; font-size: 0.95rem; }
.spec th, .spec td { text-align: left; padding: 0.7rem 0.9rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec th { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); font-weight: 400; }
.spec td { color: var(--ink-2); }
.spec td:first-child { color: var(--ink); white-space: nowrap; }
.table-wrap { max-width: 100%; min-width: 0; overflow-x: auto; }

@media (max-width: 640px) {
  .diagram-hint { display: block; }

  .spec--metrics,
  .spec--metrics tbody,
  .spec--metrics tr,
  .spec--metrics td {
    display: block;
    width: 100%;
  }

  .spec--metrics thead { display: none; }

  .spec--metrics tr {
    padding: var(--s-2) 0;
    border-bottom: 1px solid var(--line);
  }

  .spec--metrics td {
    padding: 0.3rem 0;
    border-bottom: 0;
  }

  .spec--metrics td:first-child {
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    white-space: normal;
  }

  .spec--metrics td:nth-child(2)::before,
  .spec--metrics td:nth-child(3)::before {
    display: block;
    margin-bottom: 0.15rem;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 0.62rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }

  .spec--metrics td:nth-child(2)::before { content: "Value"; }
  .spec--metrics td:nth-child(3)::before { content: "Note"; }
}

.steps { display: flex; flex-direction: column; gap: var(--s-4); counter-reset: step; }
.step { display: grid; grid-template-columns: 2.4rem minmax(0, 1fr); column-gap: var(--s-3); }
.step__body { min-width: 0; }
.step__body > :first-child { margin-top: 0; }

.step__n {
  counter-increment: step;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--accent-ink);
  padding-top: 0.35rem;
}

.step__n::before { content: counter(step, decimal-leading-zero); }

@media (max-width: 620px) {
  .step { grid-template-columns: minmax(0, 1fr); row-gap: var(--s-1); }
  .step__n { padding-top: 0; }
}

/* release entries */
.chapter + .chapter { margin-top: var(--s-5); padding-top: var(--s-5); border-top: 1px solid var(--line); }
.chapter { scroll-margin-top: 6rem; min-width: 0; }
.chapter > h2 { margin-bottom: var(--s-2); }
.chapter__date { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }

/* essay column */
.essay { max-width: 36rem; display: flex; flex-direction: column; gap: var(--s-3); }
.essay p { font-size: clamp(1.05rem, 1.6vw, 1.2rem); line-height: 1.62; color: var(--ink); margin: 0; }
.essay p + p { margin-top: 0.2rem; }

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

.foot { padding-block: var(--s-4) var(--s-5); font-family: var(--mono); font-size: 0.74rem; color: var(--muted); }

.foot__row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 2rem;
  justify-content: space-between;
  align-items: baseline;
}

.foot a { color: var(--ink-2); text-decoration: none; border-bottom: 1px solid var(--line-strong); }
.foot a:hover { color: var(--accent-ink); border-bottom-color: var(--accent); }
.foot__note { margin-top: var(--s-3); max-width: 70ch; line-height: 1.7; }

/* ---------- motion ---------- */

.rise { opacity: 1; transform: none; }

.js-anim .rise {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s cubic-bezier(0.2, 0.7, 0.3, 1), transform 0.7s cubic-bezier(0.2, 0.7, 0.3, 1);
}

.js-anim .rise.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js-anim .rise { opacity: 1; transform: none; transition: none; }
  .btn, .navlinks a { transition: none; }
}

@media (max-width: 620px) {
  :root { --s-5: 3rem; --s-6: 4.5rem; }
  body { font-size: 16px; }
  .display { font-size: clamp(2.5rem, 11vw, 3.6rem); }
  .chip { white-space: normal; }
  .actions { width: 100%; }
  .actions .btn { flex: 1 1 12rem; text-align: center; }
}