/* ──────────────────────────────────────────────────────────
   MangaLab — Studio / Atelier
   Warm paper, deep ink, single red-pencil accent
   ────────────────────────────────────────────────────────── */

:root {
  /* Palette */
  --paper:        oklch(0.965 0.012 84);   /* warm off-white */
  --paper-deep:   oklch(0.935 0.018 82);   /* card / nav band */
  --paper-edge:   oklch(0.89  0.020 80);   /* hairlines */
  --ink:          oklch(0.20  0.012 60);   /* primary text */
  --ink-soft:     oklch(0.42  0.012 60);   /* secondary text */
  --ink-mute:     oklch(0.60  0.010 60);   /* labels */
  --red-pencil:   oklch(0.55  0.150 28);   /* accent marks */
  --red-pencil-soft: oklch(0.92 0.040 30);

  /* Type */
  --serif: "Newsreader", "Georgia", "Times New Roman", serif;
  --mono:  "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans:  -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;

  /* Rhythm */
  --maxw: 1280px;
  --pad:  clamp(20px, 4vw, 56px);
  --gap:  20px;

  /* Density (tweakable via tweaks panel) */
  --card-min: 260px;
  --card-pad: 18px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  /* very subtle paper grain */
  background-image:
    radial-gradient(rgba(58,45,30,0.04) 1px, transparent 1px),
    radial-gradient(rgba(58,45,30,0.025) 1px, transparent 1px);
  background-size: 3px 3px, 7px 7px;
  background-position: 0 0, 1px 2px;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

/* ── Typography utility classes ─────────────────────────── */
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.serif-display {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.012em;
  line-height: 1.04;
}
.italic { font-style: italic; }

/* ── App shell ──────────────────────────────────────────── */
.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Top bar ────────────────────────────────────────────── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(244, 239, 228, 0.86);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 0.5px solid var(--paper-edge);
}
.topbar-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px var(--pad);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}
.brand-logo {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--paper);
  display: grid; place-items: center;
  font-family: var(--serif);
  font-weight: 600;
  font-style: italic;
  font-size: 20px;
  letter-spacing: -0.03em;
  position: relative;
}
.brand-logo::after {
  content: "";
  position: absolute;
  inset: -3px;
  border: 0.5px dashed var(--ink);
  border-radius: 10px;
  opacity: 0.25;
}
.brand-name {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.018em;
  line-height: 1;
}
.brand-sub {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-top: 3px;
}
.nav {
  display: flex;
  gap: 4px;
  justify-self: center;
  align-items: center;
}
.nav button {
  appearance: none;
  background: transparent;
  border: 0;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: color .15s, background .15s;
}
.nav button:hover { color: var(--ink); background: rgba(0,0,0,0.04); }
.nav button[data-active="1"] {
  color: var(--ink);
  background: rgba(0,0,0,0.05);
}
.nav button[data-active="1"]::before {
  content: "● ";
  color: var(--red-pencil);
  margin-right: 4px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-self: end;
}
.search-btn {
  appearance: none;
  display: flex; align-items: center; gap: 10px;
  padding: 8px 14px 8px 12px;
  border-radius: 999px;
  border: 0.5px solid var(--paper-edge);
  background: var(--paper);
  color: var(--ink-mute);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: border-color .15s, color .15s;
}
.search-btn:hover { color: var(--ink); border-color: var(--ink-mute); }
.kbd {
  font-family: var(--mono);
  font-size: 10px;
  padding: 2px 5px;
  border-radius: 4px;
  border: 0.5px solid var(--paper-edge);
  background: rgba(255,255,255,0.6);
  color: var(--ink-soft);
}

/* ── Page container ─────────────────────────────────────── */
.page {
  flex: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 56px var(--pad) 96px;
  width: 100%;
}

/* ── Section header ────────────────────────────────────── */
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 18px;
  border-bottom: 0.5px solid var(--paper-edge);
  margin-bottom: 28px;
}
.section-head .title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.02;
  font-family: var(--serif);
}
.section-head .lead {
  max-width: 460px;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.5;
}

/* ── Cards: category & tutorial ─────────────────────────── */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(var(--card-min), 1fr));
  gap: var(--gap);
}

.card {
  background: var(--paper);
  border: 0.5px solid var(--paper-edge);
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  transition: transform .18s cubic-bezier(.3,.7,.4,1), box-shadow .18s, border-color .18s;
  display: flex;
  flex-direction: column;
}
.card:hover {
  transform: translateY(-2px);
  border-color: var(--ink-mute);
  box-shadow: 0 8px 30px -16px rgba(40, 30, 15, 0.25);
}

/* striped image placeholder */
.thumb {
  position: relative;
  aspect-ratio: 4/3;
  background:
    repeating-linear-gradient(
      135deg,
      oklch(0.92 0.018 82) 0 6px,
      oklch(0.95 0.015 82) 6px 12px
    );
  border-bottom: 0.5px solid var(--paper-edge);
  display: grid;
  place-items: center;
  overflow: hidden;
}
.thumb-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: rgba(244, 239, 228, 0.85);
  padding: 6px 10px;
  border-radius: 4px;
  border: 0.5px dashed var(--ink-mute);
}
.thumb .corner {
  position: absolute;
  top: 10px; left: 10px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.thumb .num {
  position: absolute;
  bottom: 10px; right: 12px;
  font-family: var(--serif);
  font-style: italic;
  font-size: 36px;
  color: var(--red-pencil);
  opacity: 0.55;
  line-height: 1;
}

.card-body {
  padding: var(--card-pad);
  display: flex; flex-direction: column; gap: 8px;
  flex: 1;
}
.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.card h3 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 20px;
  letter-spacing: -0.012em;
  line-height: 1.18;
  color: var(--ink);
}
.card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14.5px;
  line-height: 1.5;
}
.card-foot {
  margin-top: auto;
  padding-top: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

/* difficulty pip */
.diff {
  display: inline-flex; align-items: center; gap: 6px;
}
.diff-dots {
  display: inline-flex; gap: 3px;
}
.diff-dots i {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--paper-edge);
  display: block;
}
.diff-dots i.on { background: var(--red-pencil); }

/* ── Category index page ────────────────────────────────── */
.cat-hero {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: flex-end;
  padding-bottom: 36px;
  border-bottom: 0.5px solid var(--paper-edge);
  margin-bottom: 40px;
}
@media (max-width: 800px) {
  .cat-hero { grid-template-columns: 1fr; gap: 24px; }
}
.cat-hero h1 {
  margin: 16px 0 14px;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(40px, 6.4vw, 84px);
  letter-spacing: -0.028em;
  line-height: 0.98;
}
.cat-hero h1 em {
  font-style: italic;
  color: var(--red-pencil);
}
.cat-hero p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 17px;
  max-width: 60ch;
}
.cat-stats {
  display: flex; flex-direction: column; gap: 14px;
  padding-left: 24px;
  border-left: 0.5px solid var(--paper-edge);
}
.cat-stat {
  display: flex; justify-content: space-between; gap: 24px;
  padding-bottom: 12px;
  border-bottom: 0.5px dashed var(--paper-edge);
}
.cat-stat:last-child { border: 0; padding-bottom: 0; }
.cat-stat dt {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.cat-stat dd {
  margin: 0;
  font-family: var(--serif);
  font-size: 18px;
  font-style: italic;
}

/* ── Hero (home) ────────────────────────────────────────── */
.hero {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 64px;
  align-items: flex-end;
  padding: 24px 0 56px;
  border-bottom: 0.5px solid var(--paper-edge);
  margin-bottom: 56px;
}
@media (max-width: 900px) { .hero { grid-template-columns: 1fr; gap: 32px; } }
.hero .eyebrow { margin-bottom: 18px; }
.hero h1 {
  margin: 0 0 24px;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(48px, 7.2vw, 104px);
  letter-spacing: -0.032em;
  line-height: 0.96;
  text-wrap: balance;
}
.hero h1 .mark {
  font-style: italic;
  color: var(--red-pencil);
  position: relative;
}
.hero h1 .mark::after {
  content: "";
  position: absolute;
  left: -2%; right: -4%; bottom: 6%;
  height: 0.18em;
  background: var(--red-pencil);
  opacity: 0.18;
  transform: skewY(-1.5deg);
  z-index: -1;
}
.hero .lead {
  max-width: 56ch;
  font-size: 19px;
  color: var(--ink-soft);
  line-height: 1.5;
}

.hero-side {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.hero-side .panel {
  border: 0.5px solid var(--paper-edge);
  background: rgba(255,255,255,0.4);
  border-radius: 10px;
  padding: 18px 20px;
}
.hero-side .panel .eyebrow { margin-bottom: 8px; }
.hero-side .panel .body {
  font-family: var(--serif);
  font-style: italic;
  font-size: 17px;
  color: var(--ink);
  line-height: 1.45;
}

/* category index list (home) */
.cats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1px;
  background: var(--paper-edge);
  border: 0.5px solid var(--paper-edge);
  border-radius: 12px;
  overflow: hidden;
}
.cat-row {
  background: var(--paper);
  padding: 22px 24px;
  cursor: pointer;
  transition: background .15s;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 140px;
  justify-content: space-between;
  position: relative;
}
.cat-row:hover { background: var(--paper-deep); }
.cat-row .num {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-mute);
  letter-spacing: 0.14em;
}
.cat-row h3 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 24px;
  letter-spacing: -0.012em;
  line-height: 1.08;
}
.cat-row .count {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
}
.cat-row .arrow {
  position: absolute;
  right: 18px; top: 22px;
  font-family: var(--serif);
  font-size: 22px;
  color: var(--ink-mute);
  transition: transform .2s, color .2s;
}
.cat-row:hover .arrow { transform: translateX(4px); color: var(--red-pencil); }

/* ── Tutorial page ──────────────────────────────────────── */
.tut-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  padding-bottom: 28px;
  margin-bottom: 28px;
  border-bottom: 0.5px solid var(--paper-edge);
}
.tut-head .crumbs {
  display: flex; gap: 8px; align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 14px;
  cursor: pointer;
}
.tut-head .crumbs span:hover { color: var(--ink); }
.tut-head h1 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(34px, 4.4vw, 52px);
  letter-spacing: -0.022em;
  line-height: 1.04;
  max-width: 22ch;
}
.tut-meta {
  display: flex; gap: 20px; align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-top: 16px;
}
.tut-meta .sep { color: var(--paper-edge); }

.tut-actions {
  display: flex; gap: 8px;
  flex-shrink: 0;
}
.tut-action {
  appearance: none;
  background: transparent;
  border: 0.5px solid var(--paper-edge);
  border-radius: 8px;
  padding: 10px 14px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px;
  transition: all .15s;
}
.tut-action:hover { color: var(--ink); border-color: var(--ink-mute); background: rgba(255,255,255,0.4); }
.tut-action[data-active="1"] {
  color: var(--red-pencil);
  border-color: var(--red-pencil-soft);
  background: var(--red-pencil-soft);
}
.tut-action svg { width: 13px; height: 13px; }

.tut-progress {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.tut-progress-bar {
  flex: 1;
  height: 4px;
  background: var(--paper-edge);
  border-radius: 999px;
  overflow: hidden;
}
.tut-progress-bar span {
  display: block;
  height: 100%;
  background: var(--red-pencil);
  border-radius: 999px;
  transition: width .35s cubic-bezier(.3,.7,.4,1);
}
.tut-progress-label {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  min-width: 110px;
  text-align: right;
}

/* split layout */
.tut-split {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 36px;
  align-items: flex-start;
}
@media (max-width: 960px) {
  .tut-split { grid-template-columns: 1fr; }
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-top: 0.5px solid var(--paper-edge);
}
.step {
  display: grid;
  grid-template-columns: 36px 1fr auto;
  gap: 14px;
  align-items: flex-start;
  padding: 16px 4px 16px 0;
  border-bottom: 0.5px solid var(--paper-edge);
  cursor: pointer;
  transition: background .15s;
}
.step:hover { background: rgba(255,255,255,0.4); }
.step[data-current="1"] {
  background: rgba(255,255,255,0.6);
}
.step[data-current="1"] .step-num {
  background: var(--red-pencil);
  color: var(--paper);
  border-color: var(--red-pencil);
}
.step-num {
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 0.5px solid var(--ink-mute);
  display: grid; place-items: center;
  font-family: var(--serif);
  font-style: italic;
  font-size: 14px;
  color: var(--ink-soft);
  margin-left: 6px;
  margin-top: 2px;
  background: var(--paper);
  flex-shrink: 0;
}
.step[data-done="1"] .step-num {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.step-body h4 {
  margin: 0 0 4px;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 17px;
  letter-spacing: -0.008em;
  line-height: 1.22;
}
.step[data-done="1"] .step-body h4 { color: var(--ink-soft); }
.step-body p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14.5px;
  line-height: 1.5;
}
.step-check {
  appearance: none;
  width: 22px; height: 22px;
  border-radius: 6px;
  border: 0.5px solid var(--ink-mute);
  background: transparent;
  cursor: pointer;
  display: grid; place-items: center;
  margin-top: 4px;
  margin-right: 6px;
  transition: all .15s;
}
.step-check:hover { border-color: var(--ink); }
.step[data-done="1"] .step-check {
  background: var(--ink);
  border-color: var(--ink);
}
.step[data-done="1"] .step-check svg { stroke: var(--paper); }
.step-check svg {
  width: 14px; height: 14px;
  stroke: transparent;
  fill: none; stroke-width: 2.4;
  stroke-linecap: round; stroke-linejoin: round;
}

/* viewer */
.viewer {
  position: sticky;
  top: 84px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.viewer-slot {
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: 10px;
  overflow: hidden;
  border: 0.5px solid var(--paper-edge);
  background: var(--paper);
}
.viewer-slot image-slot {
  width: 100%; height: 100%;
  display: block;
}
.viewer-meta {
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.viewer-caption {
  font-family: var(--serif);
  font-style: italic;
  font-size: 17px;
  color: var(--ink);
  line-height: 1.4;
  border-left: 2px solid var(--red-pencil);
  padding: 4px 0 4px 16px;
  margin-top: 4px;
}
.viewer-nav {
  display: flex; gap: 8px;
}
.viewer-nav button {
  appearance: none;
  border: 0.5px solid var(--paper-edge);
  background: transparent;
  border-radius: 8px;
  padding: 8px 14px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all .15s;
}
.viewer-nav button:hover:not(:disabled) {
  color: var(--ink); border-color: var(--ink-mute);
}
.viewer-nav button:disabled { opacity: 0.4; cursor: not-allowed; }

/* ── Search view ────────────────────────────────────────── */
.search-shell {
  max-width: 880px;
  margin: 0 auto;
}
.search-input-wrap {
  position: relative;
  border-bottom: 0.5px solid var(--ink);
  padding-bottom: 14px;
  margin-bottom: 32px;
}
.search-input {
  appearance: none;
  width: 100%;
  border: 0;
  background: transparent;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: -0.018em;
  color: var(--ink);
  padding: 0;
  outline: 0;
}
.search-input::placeholder { color: var(--ink-mute); font-style: italic; }
.search-hint {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-60%);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.filters {
  display: flex;
  gap: 20px;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 0.5px solid var(--paper-edge);
  flex-wrap: wrap;
}
.filter-group {
  display: flex; align-items: center; gap: 10px;
}
.filter-group .label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.chip {
  appearance: none;
  background: transparent;
  border: 0.5px solid var(--paper-edge);
  border-radius: 999px;
  padding: 6px 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all .15s;
}
.chip:hover { color: var(--ink); border-color: var(--ink-mute); }
.chip[data-on="1"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

/* search result list */
.results {
  display: flex;
  flex-direction: column;
}
.result {
  display: grid;
  grid-template-columns: 96px 1fr auto;
  gap: 22px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 0.5px solid var(--paper-edge);
  cursor: pointer;
  transition: background .15s;
}
.result:hover { background: rgba(255,255,255,0.5); }
.result .rthumb {
  width: 96px; aspect-ratio: 4/3;
  background:
    repeating-linear-gradient(135deg,
      oklch(0.92 0.018 82) 0 5px,
      oklch(0.95 0.015 82) 5px 10px);
  border: 0.5px solid var(--paper-edge);
  border-radius: 6px;
  position: relative;
}
.result .rthumb .num {
  position: absolute;
  inset: 0;
  display: grid; place-items: center;
  font-family: var(--serif);
  font-style: italic;
  font-size: 22px;
  color: var(--red-pencil);
  opacity: 0.5;
}
.result h4 {
  margin: 0 0 4px;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 19px;
  letter-spacing: -0.008em;
}
.result .rmeta {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.result .ract {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.empty {
  padding: 60px 20px;
  text-align: center;
  color: var(--ink-mute);
  font-style: italic;
}

/* ── Footer ─────────────────────────────────────────────── */
.foot {
  border-top: 0.5px solid var(--paper-edge);
  margin-top: 64px;
  padding: 32px var(--pad);
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.foot .stamp {
  font-family: var(--serif);
  font-style: italic;
  font-size: 13px;
  letter-spacing: 0;
  text-transform: none;
  color: var(--ink-soft);
}

/* ── Print ──────────────────────────────────────────────── */
@media print {
  .topbar, .tut-actions, .tut-progress, .foot, .twk-panel,
  .viewer-nav, .step-check, .nav, .topbar-actions,
  body { background: white !important; background-image: none !important; }
  .page { padding: 0; max-width: none; }
  .tut-split { display: block; }
  .viewer { position: static; }
  .step { page-break-inside: avoid; }
  body { color: black; }
}