/* ============================================================
   INDUSTRIAL / DOCUMENT UI — Design Tokens
   _sys/industrial-tokens.css
   Light + Dark · Paper Tone · Document Grid
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Archivo+Narrow:ital,wght@0,400;0,500;0,600;0,700;1,400&family=JetBrains+Mono:wght@300;400;500&family=BIZ+UDPGothic:wght@400;700&family=Oswald:wght@400;500;700&display=swap');

/* ============================================================
   COLOR — Light (default / Paper tone: warm)
   ============================================================ */
:root {
  /* Paper tones — switch via [data-paper] */
  --paper-warm:  #F5F2EE;
  --paper-cool:  #EFF2F5;
  --paper-bone:  #F2EFE6;
  --paper-slate: #EAEDEF;

  /* Active paper */
  --bg:          var(--paper-warm);
  --bg-surface:  #EBEBEB;   /* panel / card */
  --bg-inset:    #E0DDD9;   /* input / code bg */
  --fg:          #111111;
  --fg-muted:    #666666;
  --fg-faint:    #999999;
  --border:      #C8C4BF;
  --border-hard: #888480;

  /* Accent — Orange */
  --accent:      #E8600A;
  --accent-dim:  rgba(232, 96, 10, 0.15);
  --accent-fg:   #FFFFFF;   /* text on accent bg */

  /* Status */
  --status-active:   #E8600A;   /* CURRENT */
  --status-inactive: #888480;
  --status-new:      #2E6DB4;

  /* Semantic */
  --error:   #C0392B;
  --success: #27AE60;
  --info:    #2E6DB4;

  /* Overlay */
  --overlay: rgba(0, 0, 0, 0.45);
}

/* Paper tone variants */
[data-paper="cool"]  { --bg: var(--paper-cool);  --bg-inset: #D8DCE0; --border: #BBC1C8; }
[data-paper="bone"]  { --bg: var(--paper-bone);  --bg-inset: #D8D4C4; --border: #C4BFB0; }
[data-paper="slate"] { --bg: var(--paper-slate); --bg-inset: #D4D8DC; --border: #B8BEC4; }

/* ============================================================
   COLOR — Dark mode
   ============================================================ */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:          #111111;
    --bg-surface:  #1A1A1A;
    --bg-inset:    #222222;
    --fg:          #F0EDE8;
    --fg-muted:    #888888;
    --fg-faint:    #555555;
    --border:      #2C2C2C;
    --border-hard: #444444;
    --accent:      #F0700A;
    --accent-dim:  rgba(240, 112, 10, 0.18);
    --accent-fg:   #111111;
    --paper-warm:  #111111;
    --paper-cool:  #111111;
    --paper-bone:  #111111;
    --paper-slate: #111111;
  }
}

[data-theme="dark"] {
  --bg:          #111111;
  --bg-surface:  #1A1A1A;
  --bg-inset:    #222222;
  --fg:          #F0EDE8;
  --fg-muted:    #888888;
  --fg-faint:    #555555;
  --border:      #2C2C2C;
  --border-hard: #444444;
  --accent:      #F0700A;
  --accent-dim:  rgba(240, 112, 10, 0.18);
  --accent-fg:   #111111;
}

[data-theme="light"] {
  --bg:          var(--paper-warm);
  --bg-surface:  #EBEBEB;
  --bg-inset:    #E0DDD9;
  --fg:          #111111;
  --fg-muted:    #666666;
  --fg-faint:    #999999;
  --border:      #C8C4BF;
  --border-hard: #888480;
  --accent:      #E8600A;
  --accent-dim:  rgba(232, 96, 10, 0.15);
  --accent-fg:   #FFFFFF;
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
:root {
  /* Families */
  --font-display:  'Archivo Narrow', 'Oswald', sans-serif;   /* headers / display */
  --font-ui:       'Archivo Narrow', sans-serif;              /* nav / labels / UI */
  --font-mono:     'JetBrains Mono', 'IBM Plex Mono', monospace; /* meta / code */
  --font-body:     'BIZ UDPGothic', 'Noto Sans JP', sans-serif;  /* prose JP */
  --font-body-en:  'Archivo Narrow', sans-serif;              /* prose EN */

  /* Scale */
  --text-2xs:  0.55rem;   /* 8px — stamp / barcode label */
  --text-xs:   0.65rem;   /* 10px — doc meta, caption */
  --text-sm:   0.75rem;   /* 11px — label, nav item */
  --text-base: 0.9rem;    /* 13px — body */
  --text-md:   1rem;      /* 15px — lead, UI list */
  --text-lg:   1.5rem;    /* 22px — H3 */
  --text-xl:   2.5rem;    /* 37px — H2 */
  --text-2xl:  clamp(3.5rem, 8vw, 7rem);  /* Hero H1 */

  /* Leading */
  --leading-none:   1;
  --leading-tight:  1.05;
  --leading-snug:   1.3;
  --leading-normal: 1.65;
  --leading-loose:  1.85;

  /* Tracking */
  --tracking-tight:   -0.02em;
  --tracking-normal:   0;
  --tracking-wide:     0.06em;
  --tracking-wider:    0.12em;
  --tracking-widest:   0.22em;
  --tracking-stamp:    0.3em;   /* all-caps stamp text */
}

/* ============================================================
   SPACING & LAYOUT
   ============================================================ */
:root {
  --header-h:    44px;
  --ticker-h:    36px;
  --sidebar-w:   220px;

  --page-x:      1.5rem;
  --page-y:      2rem;
  --section-y:   1.75rem;
  --row-y:       0.75rem;
  --gap-cell:    1px;       /* document grid gap */
  --gap-form:    1.25rem;

  --radius:      0;         /* industrial = square corners */
}

/* ============================================================
   RESET
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body-en);
  font-weight: 400;
  line-height: var(--leading-normal);
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { cursor: pointer; }

/* ============================================================
   LAYOUT — DOCUMENT SHELL
   ============================================================ */

/* Top nav bar */
.doc-nav {
  height: var(--header-h);
  background: var(--fg);
  color: var(--bg);
  display: flex;
  align-items: stretch;
  position: sticky;
  top: 0;
  z-index: 200;
  border-bottom: 1px solid var(--fg);
}

.doc-nav__brand {
  display: flex;
  align-items: center;
  padding: 0 var(--page-x);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-stamp);
  text-transform: uppercase;
  white-space: nowrap;
  border-right: 1px solid rgba(255,255,255,0.15);
  min-width: var(--sidebar-w);
}

.doc-nav__meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0 var(--page-x);
  flex: 1;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  opacity: 0.6;
}

.doc-nav__meta .separator { opacity: 0.3; }

.doc-nav__status {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  opacity: 0.7;
}

.doc-nav__status::before {
  content: '';
  display: block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #5FD35F;
  animation: blink 2.5s ease-in-out infinite;
}

.doc-nav__links {
  display: flex;
  align-items: stretch;
  list-style: none;
  border-left: 1px solid rgba(255,255,255,0.15);
  margin-left: auto;
}

.doc-nav__links a {
  display: flex;
  align-items: center;
  padding: 0 1.1rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
  transition: color 0.12s, background 0.12s;
  border-right: 1px solid rgba(255,255,255,0.1);
}

.doc-nav__links a:hover,
.doc-nav__links a[aria-current] {
  color: var(--bg);
  background: rgba(255,255,255,0.12);
}

.doc-nav__links a[aria-current] {
  background: rgba(255,255,255,0.18);
  color: #fff;
}

/* Marquee ticker */
.doc-ticker {
  height: var(--ticker-h);
  background: var(--fg);
  color: var(--bg);
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--border-hard);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  user-select: none;
}

.doc-ticker__track {
  display: flex;
  gap: 0;
  animation: marquee 28s linear infinite;
  white-space: nowrap;
}

.doc-ticker__track:hover { animation-play-state: paused; }

.doc-ticker__item {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0 1.5rem;
}

.doc-ticker__sep {
  color: var(--accent);
  font-size: 0.5rem;
  opacity: 0.9;
}

@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* Document layout: sidebar + main */
.doc-layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: calc(100vh - var(--header-h) - var(--ticker-h));
  align-items: start;
}

/* Sidebar */
.doc-sidebar {
  position: sticky;
  top: var(--header-h);
  height: calc(100vh - var(--header-h));
  overflow-y: auto;
  border-right: 1px solid var(--border);
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  background: var(--bg-surface);
}

.doc-sidebar::-webkit-scrollbar { width: 4px; }
.doc-sidebar::-webkit-scrollbar-track { background: transparent; }
.doc-sidebar::-webkit-scrollbar-thumb { background: var(--border-hard); }

/* File card in sidebar */
.doc-file-card {
  border: 1px solid var(--border);
  background: var(--bg);
}

.doc-file-card__row {
  display: grid;
  grid-template-columns: 5rem 1fr;
  border-bottom: 1px solid var(--border);
}

.doc-file-card__row:last-child { border-bottom: none; }

.doc-file-card__key,
.doc-file-card__val {
  padding: 0.35rem 0.6rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  line-height: 1.4;
}

.doc-file-card__key {
  color: var(--fg-muted);
  border-right: 1px solid var(--border);
  background: var(--bg-inset);
}

.doc-file-card__val { color: var(--fg); font-weight: 500; }

/* TOC in sidebar */
.doc-toc__heading {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-stamp);
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.doc-toc__heading::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.doc-toc__list { list-style: none; }

.doc-toc__list li {
  border-bottom: 1px solid var(--border);
}

.doc-toc__list li:first-child { border-top: 1px solid var(--border); }

.doc-toc__list a {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.4rem 0.2rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--fg-muted);
  transition: color 0.12s;
}

.doc-toc__list a:hover,
.doc-toc__list a.active { color: var(--fg); }
.doc-toc__list a.active { border-left: 2px solid var(--accent); padding-left: 0.5rem; }

.doc-toc__num {
  font-size: 0.6rem;
  color: var(--fg-faint);
  min-width: 1.1rem;
}

/* Set in (font credits) */
.doc-set-in {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  color: var(--fg-faint);
  letter-spacing: var(--tracking-wide);
  line-height: 1.6;
}

.doc-set-in__heading {
  text-transform: uppercase;
  letter-spacing: var(--tracking-stamp);
  margin-bottom: 0.3rem;
  color: var(--fg-muted);
}

/* Main content area */
.doc-main {
  padding: 0;
}

/* Hero — full-width display type */
.doc-hero {
  padding: 2rem var(--page-x) 1.5rem;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.doc-hero__issue {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 0.5rem;
}

.doc-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-2xl);
  line-height: var(--leading-none);
  letter-spacing: var(--tracking-tight);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.doc-hero__subtitle {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--fg-muted);
}

.doc-hero__body {
  font-family: var(--font-body-en);
  font-size: var(--text-base);
  line-height: var(--leading-loose);
  max-width: 44ch;
  margin-top: 1.5rem;
}

.doc-hero__body strong {
  background: var(--fg);
  color: var(--bg);
  padding: 0 0.25em;
  font-weight: 400;
}

/* Stats grid row */
.doc-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--gap-cell);
  background: var(--border);
  border-top: 1px solid var(--border);
}

.doc-stat {
  background: var(--bg);
  padding: 1rem var(--page-x);
}

.doc-stat__label {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-stamp);
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 0.4rem;
}

.doc-stat__value {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
}

.doc-stat__unit {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--fg-muted);
  margin-top: 0.15rem;
}

/* Section */
.doc-section {
  padding: var(--section-y) var(--page-x);
  border-bottom: 1px solid var(--border);
}

.doc-section__header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.doc-section__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--fg-faint);
}

.doc-section__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-stamp);
  text-transform: uppercase;
}

.doc-section__rule {
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ============================================================
   COMPONENTS — STATUS BADGE
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-stamp);
  text-transform: uppercase;
  padding: 0.2rem 0.45rem;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
}

.badge-current {
  background: var(--accent);
  color: var(--accent-fg);
}

.badge-archive {
  background: var(--bg-inset);
  color: var(--fg-muted);
  border: 1px solid var(--border);
}

.badge-new {
  background: var(--info);
  color: #fff;
}

/* dot prefix */
.badge-dot::before {
  content: '';
  display: block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.75;
}

/* ============================================================
   COMPONENTS — TAG
   ============================================================ */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--fg-muted);
  border: 1px solid var(--border);
  padding: 0.18rem 0.4rem;
  white-space: nowrap;
  line-height: 1.4;
}

.tag-accent {
  color: var(--accent);
  border-color: var(--accent);
}

/* ============================================================
   COMPONENTS — DOCUMENT GRID (catalog items)
   ============================================================ */
.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--gap-cell);
  background: var(--border);
}

.doc-grid-item {
  background: var(--bg);
  display: flex;
  flex-direction: column;
}

.doc-grid-item__img {
  aspect-ratio: 4/3;
  background: var(--bg-inset);
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.doc-grid-item__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.doc-grid-item:hover .doc-grid-item__img img { transform: scale(1.03); }

.doc-grid-item__body {
  padding: 0.75rem 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
  border-top: none;
}

.doc-grid-item__sku {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-stamp);
  text-transform: uppercase;
  color: var(--fg-faint);
}

.doc-grid-item__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-md);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  line-height: var(--leading-snug);
}

.doc-grid-item__meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--fg-muted);
  margin-top: auto;
}

/* ============================================================
   COMPONENTS — BUTTON
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  padding: 0.6rem 1.25rem;
  border: 1px solid transparent;
  background: transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}
.btn-primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-fg);
}

.btn-accent {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
}
.btn-accent:hover { opacity: 0.88; }

.btn-outline {
  border-color: var(--border-hard);
  color: var(--fg-muted);
}
.btn-outline:hover {
  border-color: var(--fg);
  color: var(--fg);
}

.btn-ghost {
  border-color: transparent;
  color: var(--fg-muted);
}
.btn-ghost:hover { color: var(--fg); }

.btn-sm {
  font-size: var(--text-xs);
  padding: 0.35rem 0.75rem;
}

/* ============================================================
   COMPONENTS — FORM
   ============================================================ */
.form-group { margin-bottom: var(--gap-form); }

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 0.4rem;
}

.form-label .req { color: var(--accent); }

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  padding: 0.55rem 0.75rem;
  outline: none;
  transition: border-color 0.12s;
  -webkit-appearance: none;
  appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder { color: var(--fg-faint); }

.form-input:focus,
.form-select:focus,
.form-textarea:focus { border-color: var(--accent); }

.form-textarea {
  resize: vertical;
  min-height: 88px;
  line-height: var(--leading-normal);
}

.form-hint {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--fg-faint);
  margin-top: 0.3rem;
  letter-spacing: var(--tracking-wide);
}

.form-group.is-error .form-input,
.form-group.is-error .form-textarea { border-color: var(--error); }
.form-group.is-error .form-hint     { color: var(--error); }
.form-group.is-success .form-input  { border-color: var(--success); }

/* ============================================================
   COMPONENTS — DATA ROWS (key/value list)
   ============================================================ */
.data-rows { border: 1px solid var(--border); }

.data-row {
  display: grid;
  grid-template-columns: 8rem 1fr;
  border-bottom: 1px solid var(--border);
}

.data-row:last-child { border-bottom: none; }

.data-row__key,
.data-row__val {
  padding: 0.5rem 0.75rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  line-height: 1.5;
}

.data-row__key {
  color: var(--fg-muted);
  background: var(--bg-inset);
  border-right: 1px solid var(--border);
}

.data-row__val { color: var(--fg); }

/* ============================================================
   COMPONENTS — FILTER BAR
   ============================================================ */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--gap-cell);
  background: var(--border);
  padding: 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.filter-bar::-webkit-scrollbar { display: none; }

.filter-bar__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--fg-muted);
  padding: 0.6rem 1rem;
  background: var(--bg);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--fg-muted);
  background: var(--bg);
  border: none;
  padding: 0.6rem 0.9rem;
  cursor: pointer;
  transition: color 0.12s, background 0.12s;
  white-space: nowrap;
}

.filter-btn:hover { color: var(--fg); }
.filter-btn.active {
  background: var(--fg);
  color: var(--bg);
}

/* ============================================================
   COMPONENTS — TWEAKS PANEL
   ============================================================ */
.tweaks-panel {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  width: 240px;
  background: var(--bg);
  border: 1px solid var(--border-hard);
  box-shadow: 0 4px 24px rgba(0,0,0,0.18);
  z-index: 300;
}

.tweaks-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0.85rem;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  font-weight: 500;
}

.tweaks-panel__close {
  background: none;
  border: none;
  color: var(--fg-muted);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
}

.tweaks-panel__section {
  padding: 0.85rem;
  border-bottom: 1px solid var(--border);
}

.tweaks-panel__section:last-child { border-bottom: none; }

.tweaks-panel__label {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-stamp);
  text-transform: uppercase;
  color: var(--fg-faint);
  margin-bottom: 0.6rem;
}

/* Palette chips */
.palette-chips {
  display: flex;
  gap: 4px;
}

.palette-chip {
  flex: 1;
  height: 28px;
  border: 1px solid var(--border);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--fg-muted);
  transition: border-color 0.12s;
}

.palette-chip:hover,
.palette-chip.active { border-color: var(--fg); color: var(--fg); }

.palette-chip[data-paper="warm"]  { background: #F5F2EE; }
.palette-chip[data-paper="cool"]  { background: #EFF2F5; }
.palette-chip[data-paper="bone"]  { background: #F2EFE6; }
.palette-chip[data-paper="slate"] { background: #EAEDEF; }

/* Segmented control */
.seg-ctrl {
  display: flex;
  gap: 0;
  border: 1px solid var(--border);
}

.seg-btn {
  flex: 1;
  padding: 0.35rem 0;
  background: none;
  border: none;
  border-right: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--fg-muted);
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}

.seg-btn:last-child { border-right: none; }
.seg-btn:hover { color: var(--fg); }
.seg-btn.active {
  background: var(--fg);
  color: var(--bg);
}

/* Toggle */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--fg-muted);
}

.toggle {
  position: relative;
  width: 36px;
  height: 20px;
  cursor: pointer;
}

.toggle input { display: none; }

.toggle__track {
  position: absolute;
  inset: 0;
  background: var(--bg-inset);
  border: 1px solid var(--border-hard);
  border-radius: 10px;
  transition: background 0.15s;
}

.toggle input:checked ~ .toggle__track {
  background: var(--accent);
  border-color: var(--accent);
}

.toggle__thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 12px;
  height: 12px;
  background: var(--fg-muted);
  border-radius: 50%;
  transition: transform 0.15s, background 0.15s;
}

.toggle input:checked ~ .toggle__thumb {
  transform: translateX(16px);
  background: #fff;
}

/* ============================================================
   UTILITIES
   ============================================================ */
.u-mono {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--fg-muted);
}

.u-display {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: var(--tracking-tight);
}

.u-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-stamp);
  text-transform: uppercase;
  color: var(--fg-faint);
}

.u-border-b { border-bottom: 1px solid var(--border); }
.u-border-t { border-top:    1px solid var(--border); }

.u-muted  { color: var(--fg-muted); }
.u-faint  { color: var(--fg-faint); }
.u-accent { color: var(--accent); }

.u-grid-bg {
  background: var(--border);
  gap: var(--gap-cell);
  display: grid;
}

.u-grid-bg > * { background: var(--bg); }

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.25; }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  :root {
    --sidebar-w: 100%;
    --header-h:  40px;
  }

  .doc-layout {
    grid-template-columns: 1fr;
  }

  .doc-sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .doc-nav__meta { display: none; }

  .doc-hero__title {
    font-size: clamp(2.5rem, 12vw, 5rem);
  }

  .doc-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  :root { --page-x: 1rem; }

  .doc-nav__links a { padding: 0 0.7rem; }

  .doc-stats {
    grid-template-columns: 1fr 1fr;
  }
}


/* kidok.jp — dark default */
html {
  --bg:          #111111;
  --bg-surface:  #1A1A1A;
  --bg-inset:    #222222;
  --fg:          #F0EDE8;
  --fg-muted:    #888888;
  --fg-faint:    #555555;
  --border:      #2C2C2C;
  --border-hard: #444444;
  --accent:      #E8600A;
  --accent-fg:   #111111;
}

/* Cover page */
html, body {
  height: 100%;
  margin: 0;
}

.cover {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: stretch;
  background: var(--bg);
  padding: 1.5rem;
  box-sizing: border-box;
}

.cover__frame {
  flex: 1;
  border: 1px solid var(--border-hard);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.cover__grid {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    90deg,
    transparent 0px, transparent 39px,
    var(--border) 39px, var(--border) 40px
  );
  opacity: 0.25;
  pointer-events: none;
}

.cover__top,
.cover__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  position: relative;
}

.cover__top   { border-bottom: 1px solid var(--border); }
.cover__bottom { border-top: 1px solid var(--border); }

.cover__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-stamp);
  text-transform: uppercase;
  color: var(--fg-faint);
}

.cover__center {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem 1.5rem;
  position: relative;
}

.cover__eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-stamp);
  text-transform: uppercase;
  color: var(--fg-faint);
  margin-bottom: 1rem;
}

.cover__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(5rem, 20vw, 14rem);
  line-height: 0.9;
  letter-spacing: 0.12em;
  text-transform: none;
  color: var(--fg);
  margin-bottom: 1.5rem;
}

.cover__subtitle {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-stamp);
  text-transform: uppercase;
  color: var(--fg-muted);
}

.cover__status {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-stamp);
  text-transform: uppercase;
  color: var(--fg-faint);
}

.cover__dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #5FD35F;
  flex-shrink: 0;
  animation: blink 2.5s ease-in-out infinite;
}

/* Hub list */
.hub-list {
  display: flex;
  flex-direction: column;
}

.hub-item {
  display: grid;
  grid-template-columns: 5rem 1fr auto;
  gap: 1rem;
  padding: var(--row-y) var(--page-x);
  border-bottom: 1px solid var(--border);
  align-items: center;
  text-decoration: none;
  color: var(--fg);
  transition: background 0.12s;
}

.hub-item:first-child { border-top: 1px solid var(--border); }
.hub-item:hover { background: var(--bg-surface); }

.hub-item__tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-stamp);
  text-transform: uppercase;
  color: var(--fg-faint);
}

.hub-item__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-md);
  letter-spacing: var(--tracking-wide);
  text-transform: none;
}

.hub-item__sub {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--fg-muted);
  margin-top: 0.15rem;
  letter-spacing: var(--tracking-wide);
}

.hub-item__arrow {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--accent);
}