/* ==========================================================================
   THE DAVENPORTER — Vibe 4: Kitayama Cedar, Old-Growth Forest & Swiss Exhibition Gallery
   Sugi & Matsu (Kitayama Cedar) · Kamo Indigo · Yakisugi Moss · Uji Celadon
   Zero Material Design · Zero Mint/Sepia · Translucent Shoji & Woodblock Joinery
   ========================================================================== */

@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('/static/fonts/PlusJakartaSans.ttf') format('truetype');
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Newsreader';
  src: url('/static/fonts/Newsreader.ttf') format('truetype');
  font-weight: 400 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Newsreader';
  src: url('/static/fonts/Newsreader-Italic.ttf') format('truetype');
  font-weight: 400 600;
  font-style: italic;
  font-display: swap;
}

:root {
  color-scheme: light dark;

  /* Option A Default Light: "Kitayama Cedar & Old-Growth Forest (Sugi & Matsu)" */
  --bg-primary: #F4F5F3;
  --bg-secondary: #EAECE8;
  --bg-canvas: var(--bg-primary);
  --bg-surface: var(--bg-secondary);
  --bg-elevated: rgba(250, 250, 248, 0.88);
  --surface-card: var(--bg-elevated);
  --text-primary: #181E1A;
  --ink-primary: var(--text-primary);
  --text-secondary: #4A554E;
  --ink-secondary: var(--text-secondary);
  --accent-primary: #2C4237;
  --accent-secondary: #7C5841;
  --accent-tertiary: #9E473B;
  --border-subtle: #D5DBD6;
  --border-hairline: var(--border-subtle);
  --border-structural: #2C4237;
  --code-bg: #181E1A;
  --code-ink: #EAECE8;

  /* Typography */
  --font-display: 'Newsreader', Georgia, 'Times New Roman', serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root:has(> head > meta[name="color-scheme"][content="light dark"]),
  :root:not(:has(> head > meta[name="color-scheme"][content="light"])):not([data-theme="light"]) {
    /* Option C Default Dark: "Yakisugi Charred Cedar & Old-Growth Canopy" */
    --bg-primary: #141815;
    --bg-secondary: #1C221E;
    --bg-elevated: rgba(28, 34, 30, 0.88);
    --surface-card: var(--bg-elevated);
    --text-primary: #EAECE9;
    --ink-primary: var(--text-primary);
    --text-secondary: #96A29A;
    --ink-secondary: var(--text-secondary);
    --accent-primary: #769985;
    --accent-secondary: #B88664;
    --accent-tertiary: #C96A5B;
    --border-subtle: #2A332D;
    --border-hairline: var(--border-subtle);
    --border-structural: #769985;
    --code-bg: #0E110F;
    --code-ink: #EAECE9;
  }
}

:root:has(> head > meta[name="color-scheme"][content="light"]):not([data-palette="indigo"]):not([data-palette="celadon"]):not([data-palette="moss"]),
:root[data-theme="light"]:not([data-palette="indigo"]):not([data-palette="celadon"]):not([data-palette="moss"]),
:root:root[data-palette="bamboo"]:not([data-theme="dark"]) {
  color-scheme: light;
  --bg-primary: #F4F5F3;
  --bg-secondary: #EAECE8;
  --bg-elevated: rgba(250, 250, 248, 0.88);
  --surface-card: var(--bg-elevated);
  --text-primary: #181E1A;
  --ink-primary: var(--text-primary);
  --text-secondary: #4A554E;
  --ink-secondary: var(--text-secondary);
  --accent-primary: #2C4237;
  --accent-secondary: #7C5841;
  --accent-tertiary: #9E473B;
  --border-subtle: #D5DBD6;
  --border-hairline: var(--border-subtle);
  --border-structural: #2C4237;
  --code-bg: #181E1A;
  --code-ink: #EAECE8;
}

:root:has(> head > meta[name="color-scheme"][content="dark"]):not([data-palette="indigo"]):not([data-palette="celadon"]),
:root[data-theme="dark"]:not([data-palette="indigo"]):not([data-palette="celadon"]),
:root:root[data-palette="moss"] {
  color-scheme: dark;
  --bg-primary: #141815;
  --bg-secondary: #1C221E;
  --bg-elevated: rgba(28, 34, 30, 0.88);
  --surface-card: var(--bg-elevated);
  --text-primary: #EAECE9;
  --ink-primary: var(--text-primary);
  --text-secondary: #96A29A;
  --ink-secondary: var(--text-secondary);
  --accent-primary: #769985;
  --accent-secondary: #B88664;
  --accent-tertiary: #C96A5B;
  --border-subtle: #2A332D;
  --border-hairline: var(--border-subtle);
  --border-structural: #769985;
  --code-bg: #0E110F;
  --code-ink: #EAECE9;
}

/* Option B: Kamo River Indigo & Snow Linen ([data-palette="indigo"]) */
:root:root[data-palette="indigo"] {
  --bg-primary: #F2F6FA;
  --bg-secondary: #E2ECF5;
  --bg-elevated: rgba(255, 255, 255, 0.88);
  --surface-card: var(--bg-elevated);
  --text-primary: #0F172A;
  --ink-primary: var(--text-primary);
  --text-secondary: #334155;
  --ink-secondary: var(--text-secondary);
  --accent-primary: #1E3A8A;
  --accent-secondary: #0284C7;
  --accent-tertiary: #E11D48;
  --border-subtle: #CBD5E1;
  --border-hairline: var(--border-subtle);
  --border-structural: #1E3A8A;
  --code-bg: #0F172A;
  --code-ink: #F1F5F9;
}

:root:root[data-theme="dark"][data-palette="indigo"] {
  --bg-primary: #0B1120;
  --bg-secondary: #111827;
  --bg-elevated: rgba(17, 24, 39, 0.88);
  --surface-card: var(--bg-elevated);
  --text-primary: #F1F5F9;
  --ink-primary: var(--text-primary);
  --text-secondary: #94A3B8;
  --ink-secondary: var(--text-secondary);
  --accent-primary: #60A5FA;
  --accent-secondary: #38BDF8;
  --accent-tertiary: #FB7185;
  --border-subtle: #1E293B;
  --border-hairline: var(--border-subtle);
  --border-structural: #60A5FA;
  --code-bg: #070B14;
  --code-ink: #F1F5F9;
}

/* Option D: Uji Celadon, Matsu Pine & Wild Plum ([data-palette="celadon"]) */
:root:root[data-palette="celadon"] {
  --bg-primary: #EFF5F5;
  --bg-secondary: #DFECEB;
  --bg-elevated: rgba(250, 253, 253, 0.88);
  --surface-card: var(--bg-elevated);
  --text-primary: #0F2222;
  --ink-primary: var(--text-primary);
  --text-secondary: #365352;
  --ink-secondary: var(--text-secondary);
  --accent-primary: #115E59;
  --accent-secondary: #9D174D;
  --accent-tertiary: #0284C7;
  --border-subtle: #C4D7D6;
  --border-hairline: var(--border-subtle);
  --border-structural: #115E59;
  --code-bg: #0F2222;
  --code-ink: #E6F2F2;
}

:root:root[data-theme="dark"][data-palette="celadon"] {
  --bg-primary: #0D1919;
  --bg-secondary: #132424;
  --bg-elevated: rgba(19, 36, 36, 0.88);
  --surface-card: var(--bg-elevated);
  --text-primary: #E6F2F2;
  --ink-primary: var(--text-primary);
  --text-secondary: #8CAFA9;
  --ink-secondary: var(--text-secondary);
  --accent-primary: #2DD4BF;
  --accent-secondary: #F472B6;
  --accent-tertiary: #38BDF8;
  --border-subtle: #213B3B;
  --border-hairline: var(--border-subtle);
  --border-structural: #2DD4BF;
  --code-bg: #081111;
  --code-ink: #E6F2F2;
}

/* High-Contrast Accessibility Override */
@media (forced-colors: active) {
  :root {
    --bg-primary: Canvas;
    --bg-secondary: Canvas;
    --bg-elevated: Canvas;
    --surface-card: Canvas;
    --text-primary: CanvasText;
    --ink-primary: CanvasText;
    --text-secondary: CanvasText;
    --ink-secondary: CanvasText;
    --accent-primary: LinkText;
    --accent-secondary: Highlight;
    --accent-tertiary: Highlight;
    --border-subtle: CanvasText;
    --border-hairline: CanvasText;
  }
  .card-kyoto,
  .essay-card,
  .blueprint-card,
  .metric-strip,
  .btn-exhibition,
  .figure-frame,
  .figure-plate,
  .topbar {
    forced-color-adjust: none;
    border: 1px solid CanvasText !important;
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  background-color: var(--bg-primary);
  color: var(--ink-primary);
  font-family: var(--font-sans);
  line-height: 1.65;
}

a {
  color: var(--accent-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--accent-secondary);
}

/* ==========================================================================
   SINGLE-ROW TOP APP BAR (Strictly 2 Direct Children: .topbar-left & .topbar-right)
   ========================================================================== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 52px;
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0 1.5rem;
  container-type: inline-size;
  container-name: topbar;
  background: color-mix(in srgb, var(--bg-canvas) 95%, var(--bg-surface));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}

.topbar-left {
  display: flex;
  align-items: center;
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  gap: clamp(0.5rem, 1.5vw, 1.5rem);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-shrink: 0;
}

/* Architectural Woodblock Palette Control inside .topbar-right */
.palette-woodblock-menu {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.woodblock-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.38rem 0.7rem;
  border-radius: 2px;
  border: 1px solid var(--border-subtle);
  border-left: 2px solid var(--accent-secondary);
  background: var(--bg-elevated);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.woodblock-pill:hover {
  border-color: var(--accent-primary);
  border-left-color: var(--accent-primary);
}

.woodblock-swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  display: inline-block;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent-primary) 50%, var(--accent-secondary) 50%);
  border: 1px solid var(--border-subtle);
}

.palette-popover {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 228px;
  background: var(--bg-surface);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  padding: 0.35rem;
  display: none;
  flex-direction: column;
  gap: 0.2rem;
  z-index: 200;
  box-shadow: 0 8px 24px rgba(20, 24, 21, 0.18);
}

.palette-popover.is-open {
  display: flex;
}

.palette-option {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.5rem;
  width: 100%;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.38rem 0.55rem;
  border-radius: 2px;
  border: 1px solid transparent;
  border-left: 2px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  text-align: left;
  transition: all 0.12s ease;
}

.palette-option:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.palette-option.active {
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 700;
  border-color: var(--border-subtle);
  border-left: 2px solid var(--accent-primary);
}

.palette-swatch {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  display: inline-block;
  flex-shrink: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
  flex-shrink: 0;
  text-decoration: none;
  color: var(--ink-primary);
}

.brand-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: -0.008em;
  color: var(--ink-primary);
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex: 1 1 auto;
  min-width: 0;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

@supports not (scrollbar-color: auto) {
  .primary-nav::-webkit-scrollbar {
    display: none;
  }
}

.nav-link {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  white-space: nowrap;
  font-weight: 500;
  color: var(--ink-secondary);
  text-decoration: none;
  padding: 0.35rem 0.75rem;
  border: 1px solid transparent;
  transition: all 0.15s ease;
}

.nav-link:hover {
  color: var(--ink-primary);
  background-color: var(--bg-secondary);
}

.nav-link.active {
  color: var(--ink-primary);
  font-weight: 600;
  background-color: var(--surface-card);
  border-color: var(--border-hairline);
}

/* ==========================================================================
   EXHIBITION SHELL (Left Studio Rail + Expansive Center Stage + Collapsible Drawer)
   ========================================================================== */
.exhibition-shell {
  display: grid;
  grid-template-columns: 216px minmax(0, 1fr) 310px;
  min-height: calc(100dvh - 52px);
  max-width: 1640px;
  margin: 0 auto;
}

.exhibition-shell.drawer-collapsed,
.exhibition-shell.is-drawer-closed,
.exhibition-shell.is-collapsed {
  grid-template-columns: 216px minmax(0, 1fr);
}

.exhibition-shell.drawer-collapsed .drawer-right,
.exhibition-shell.is-drawer-closed .drawer-right,
.exhibition-shell.is-collapsed .drawer-right,
.drawer-right.is-collapsed {
  display: none;
}

/* Panel 1: Calm Left Studio Rail */
.rail-left {
  position: sticky;
  top: 52px;
  max-height: calc(100dvh - 52px);
  overflow-y: auto;
  align-self: start;
  padding: 1.75rem 1.25rem;
  border-right: 1px solid var(--border-hairline);
  background-color: var(--bg-primary);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  font-size: 0.9rem;
}

.rail-section {
  border-top: 1px solid var(--border-hairline);
  padding-top: 1.15rem;
}

.rail-essay-list {
  list-style: none;
  padding: 0;
  margin: 0.45rem 0 0;
  display: grid;
  gap: 0.65rem;
}

.rail-essay-link {
  display: block;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 0.86rem;
  line-height: 1.42;
  color: var(--ink-primary);
  text-decoration: none;
}

.rail-essay-link:hover {
  color: var(--accent-secondary);
}

.rail-social-list {
  list-style: none;
  padding: 0;
  margin: 0.45rem 0 0;
  display: grid;
  gap: 0.45rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

.rail-social-list a {
  text-decoration: none;
  color: var(--ink-secondary);
}

.rail-social-list a:hover {
  color: var(--ink-primary);
}

/* Panel 2: Center Editorial Stage */
.stage-center {
  padding: 2.25rem 3rem 4rem;
  max-width: min(1180px, 100%);
  min-width: 0;
  width: 100%;
  margin: 0 auto;
  container-type: inline-size;
  container-name: stage;
}

/* Panel 3: Collapsible Right Inspector Drawer */
.drawer-right {
  padding: 1.5rem 1.25rem;
  border-left: 1px solid var(--border-hairline);
  background-color: var(--bg-secondary);
  font-size: 0.875rem;
  overflow-y: auto;
}

/* ==========================================================================
   EDITORIAL TYPOGRAPHY & HUMAN-FIRST STANDFIRST (.aeo-capsule)
   ========================================================================== */
.section-kicker {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--accent-secondary);
  margin: 0 0 0.45rem;
  line-height: 1.4;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--ink-primary);
  line-height: 1.22;
  letter-spacing: -0.005em;
  margin-top: 0;
}

.page-title {
  font-size: clamp(2rem, 3vw, 2.75rem);
  letter-spacing: -0.008em;
  line-height: 1.18;
  margin-bottom: 0.65rem;
  max-width: 30ch;
}

/* The 40-80 word AEO Answer Capsule styled as a serene Editorial Standfirst */
.aeo-capsule {
  font-family: var(--font-sans);
  font-size: clamp(1.04rem, 1.2vw, 1.14rem);
  line-height: 1.68;
  letter-spacing: 0;
  font-weight: 400;
  color: var(--ink-secondary);
  border: none;
  background: transparent;
  padding: 0;
  margin: 0 0 2rem 0;
  max-width: 68ch;
}

.aeo-capsule p {
  margin: 0;
}

.meta-quiet {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  color: var(--ink-secondary);
  letter-spacing: 0.01em;
}

.font-mono {
  font-family: var(--font-mono);
}

.tnum {
  font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   ASYMMETRIC EDITORIAL SPREADS, MAGAZINE CARDS & PLINTHS
   ========================================================================== */
.editorial-spread {
  display: grid;
  grid-template-columns: 1.38fr 1fr;
  gap: 2.25rem;
  align-items: start;
  margin-bottom: 3rem;
}

.magazine-hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1.25fr;
  gap: 2rem;
  align-items: center;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 1.5rem;
}

.card-kyoto,
.essay-card,
.blueprint-card,
.story-package-card,
.metric-strip {
  background: var(--bg-elevated);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  padding: 1.5rem;
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
  container-type: inline-size;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.card-kyoto:hover,
.essay-card:hover,
.blueprint-card:hover,
.story-package-card:hover {
  border-color: var(--accent-primary);
}

.lead-essay-card {
  background: var(--bg-elevated);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  padding: 1.75rem;
}

/* Architectural Woodblock Buttons & Tags */
.btn-exhibition,
.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.38rem 0.78rem;
  border-radius: 2px;
  background: var(--bg-elevated);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--ink-primary);
  border: 1px solid var(--border-subtle);
  border-left: 2px solid var(--border-subtle);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.tag-pill {
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.22rem 0.6rem;
  color: var(--ink-secondary);
  border-left: 2px solid var(--accent-secondary);
}

.btn-exhibition:hover,
.tag-pill:hover {
  border-color: var(--accent-primary);
  border-left-color: var(--accent-primary);
  color: var(--accent-primary);
}

.tag-pill.active {
  color: var(--ink-primary);
  border-color: var(--accent-primary);
  border-left-color: var(--accent-primary);
  font-weight: 600;
}

.btn-exhibition.active {
  background-color: var(--accent-primary);
  color: #F4F5F3;
  border-color: var(--accent-primary);
  border-left: 2px solid var(--accent-secondary);
}

.btn-terracotta {
  background-color: var(--accent-secondary);
  color: #F4F5F3 !important;
  border-color: var(--accent-secondary);
  border-left: 2px solid var(--accent-primary);
}

.btn-terracotta:hover {
  opacity: 0.92;
  color: #F4F5F3 !important;
}

/* ==========================================================================
   FIGURES, KARESANSUI RIPPLE PLATES & SEMANTIC TABLES
   ========================================================================== */
.figure-frame,
.figure-plate {
  margin: 0 0 2rem 0;
  background-color: var(--bg-elevated);
  background-image: repeating-radial-gradient(
    circle at 86% 24%,
    transparent 0,
    transparent 24px,
    rgba(44, 66, 55, 0.04) 25px,
    transparent 26px
  );
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  padding: 1.25rem;
}

.figure-plate-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding-bottom: 0.65rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text-secondary);
}

.figure-plate-clean {
  margin: 0 0 1rem 0;
  padding: 0;
  border: none;
  background: transparent;
}

.figure-plate svg {
  width: 100%;
  height: auto;
  display: block;
}

.figure-plate figcaption,
.figure-plate-clean figcaption {
  margin-top: 0.65rem;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  color: var(--ink-secondary);
  line-height: 1.5;
}

.essay-hero-img {
  width: 100%;
  height: auto;
  max-height: 440px;
  object-fit: cover;
  border: 1px solid var(--border-hairline);
  display: block;
}

/* Semantic Tables */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border-hairline);
  background-color: var(--surface-card);
}

.table-kyoto {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  text-align: left;
}

.table-kyoto caption {
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  color: var(--ink-secondary);
  text-align: left;
  border-bottom: 1px solid var(--border-hairline);
  background-color: var(--bg-secondary);
}

.table-kyoto th,
.table-kyoto td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-hairline);
  vertical-align: top;
}

.table-kyoto thead th {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--ink-secondary);
  background-color: var(--bg-primary);
}

/* ==========================================================================
   LONG-FORM MONOGRAPH READING COLUMN (68ch) & PROGRESS BAR
   ========================================================================== */
.reading-column {
  max-width: 68ch;
  margin: 0 auto;
}

.reading-progress-track {
  position: fixed;
  top: 52px;
  left: 0;
  width: 100%;
  height: 2px;
  background: transparent;
  z-index: 99;
}

.reading-progress-bar {
  height: 100%;
  width: 0%;
  background-color: var(--accent-secondary);
  transition: width 0.1s linear;
}

.prose-monograph {
  font-size: 1.06rem;
  line-height: 1.78;
  color: var(--ink-primary);
}

.prose-monograph p {
  margin: 0 0 1.35rem;
}

.prose-monograph h2,
.prose-monograph h3 {
  margin-top: 2.25rem;
  margin-bottom: 0.75rem;
}

.prose-monograph img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border-hairline);
  margin: 1.25rem 0;
  display: block;
}

.prose-monograph blockquote {
  margin: 1.5rem 0;
  padding-left: 1.25rem;
  border-left: 2px solid var(--accent-secondary);
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--ink-secondary);
}

/* Code Blocks */
.code-block {
  background-color: var(--code-bg);
  color: var(--code-ink);
  padding: 1rem 1.25rem;
  border: 1px solid var(--border-hairline);
  max-width: 100%;
  box-sizing: border-box;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.55;
}

/* ==========================================================================
   SIMULATION ARCADE PLINTH (Yakisugi Charred Cedar & Old-Growth Canopy)
   ========================================================================== */
.arcade-plinth {
  background-color: #141815;
  color: #EAECE9;
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  margin: 0 0 2rem 0;
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
  container-type: inline-size;
}

.arcade-hud {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.15rem;
  background-color: #1C221E;
  border-bottom: 1px solid #2A332D;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
}

.arcade-canvas {
  width: 100%;
  max-width: 920px;
  height: auto;
  display: block;
  margin: 0 auto;
  background-color: #141815;
}

/* Form Controls */
.input-kyoto,
.select-kyoto {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  padding: 0.42rem 0.7rem;
  background-color: var(--surface-card);
  color: var(--ink-primary);
  border: 1px solid var(--border-hairline);
}

/* ==========================================================================
   RESPONSIVE FORMAT ARCHITECTURE (desktop | tablet | mobile)
   One source of truth: :root[data-format]. The head script (and the server,
   from client hints / ?format=) sets it before first paint, and app.js keeps
   it in sync on resize, so no duplicated @media copies are needed.
   ========================================================================== */

/* Tablet + mobile: tighter nav */
:root[data-format="tablet"] .primary-nav .nav-link,
:root[data-format="mobile"] .primary-nav .nav-link {
  padding: 0.3rem 0.55rem;
}

/* Tablet: narrow rail, drawer overlays */
:root[data-format="tablet"] .exhibition-shell,
:root[data-format="tablet"] .exhibition-shell.drawer-collapsed,
:root[data-format="tablet"] .exhibition-shell.is-drawer-closed,
:root[data-format="tablet"] .exhibition-shell.is-collapsed {
  grid-template-columns: 192px minmax(0, 1fr);
}

:root[data-format="tablet"] .stage-center {
  padding: 1.75rem 1.75rem 3rem;
  min-width: 0;
  max-width: 100%;
}

:root[data-format="tablet"] .aeo-drawer,
:root[data-format="mobile"] .aeo-drawer {
  position: fixed;
  top: 52px;
  right: 0;
  width: min(340px, 92dvw);
  height: calc(100dvh - 52px);
  background: var(--bg-surface);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  z-index: 200;
  box-shadow: -8px 0 24px rgba(0, 0, 0, 0.16);
}

/* Mobile: the topbar stays ONE 52px row; the nav scrolls horizontally. */
:root[data-format="mobile"] .topbar {
  padding: 0 0.75rem;
  gap: 0.5rem;
}

:root[data-format="mobile"] .topbar-left {
  gap: 0.5rem;
}

:root[data-format="mobile"] .brand-title {
  font-size: 1.05rem;
}

:root[data-format="mobile"] .primary-nav {
  gap: 0.1rem;
  mask-image: linear-gradient(to right, #000 85%, transparent);
}

:root[data-format="mobile"] .primary-nav .nav-link {
  padding: 0.3rem 0.45rem;
}

:root[data-format="mobile"] .topbar-ask {
  padding: 0.3rem 0.6rem;
}

:root[data-format="mobile"] .exhibition-shell,
:root[data-format="mobile"] .exhibition-shell.drawer-collapsed,
:root[data-format="mobile"] .exhibition-shell.is-drawer-closed,
:root[data-format="mobile"] .exhibition-shell.is-collapsed {
  grid-template-columns: 1fr;
  display: flex;
  flex-direction: column;
}

:root[data-format="mobile"] .stage-center {
  order: 1;
  padding: 1.5rem 1.15rem 2.5rem;
  min-width: 0;
  max-width: 100%;
}

:root[data-format="mobile"] .rail-left {
  order: 2;
  position: static;
  max-height: none;
  border-right: none;
  border-bottom: none;
  border-top: 1px solid var(--border-subtle);
  padding: 1.75rem 1.15rem;
}

/* Reading mode hook: `{% block shell_class %}is-reading{% endblock %}` hides the rail */
.exhibition-shell.is-reading {
  grid-template-columns: minmax(0, 1fr) 310px;
}

.exhibition-shell.is-reading.drawer-collapsed,
.exhibition-shell.is-reading.is-drawer-closed,
.exhibition-shell.is-reading.is-collapsed,
:root[data-format="tablet"] .exhibition-shell.is-reading,
:root[data-format="tablet"] .exhibition-shell.is-reading.drawer-collapsed,
:root[data-format="tablet"] .exhibition-shell.is-reading.is-drawer-closed,
:root[data-format="tablet"] .exhibition-shell.is-reading.is-collapsed {
  grid-template-columns: minmax(0, 1fr);
}

.exhibition-shell.is-reading .rail-left {
  display: none;
}

/* Single-column editorial layouts whenever the center stage is narrow */
@container stage (max-width: 820px) {
  .editorial-spread,
  .magazine-hero-grid,
  .exhibition-shell .home-cards {
    grid-template-columns: minmax(0, 1fr);
  }
}

@container stage (max-width: 560px) {
  /* Narrow: text first, small un-cropped thumbnail on the right. */
  .exhibition-shell .lead-essay {
    grid-template-columns: minmax(0, 1fr) 96px;
    gap: 1rem;
  }
  .exhibition-shell .lead-essay-img {
    aspect-ratio: auto;
    object-fit: contain;
  }
  .recent-essay-date {
    display: none;
  }
}

/* Manual Viewport Format Preview Framing on Wider Screens */
:root[data-format-mode="tablet"] .exhibition-shell {
  max-width: 860px;
  margin: 0 auto;
  border-left: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
}

:root[data-format-mode="mobile"] .exhibition-shell {
  max-width: 430px;
  margin: 0 auto;
  border-left: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
}

/* ==========================================================================
   GEMINI NANO BROWSER AGENT, WEBMCP STUDIO & DRAWER TABS
   ========================================================================== */
.drawer-tab-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(0, 1fr));
  gap: 0.25rem;
  padding: 0.22rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  margin-bottom: 0.85rem;
}

.drawer-tab-btn {
  appearance: none;
  background: transparent;
  border: 1px solid transparent;
  padding: 0.4rem 0.3rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink-secondary);
  cursor: pointer;
  text-align: center;
  transition: all 0.14s ease;
  white-space: nowrap;
}

.drawer-tab-btn:hover {
  color: var(--ink-primary);
  border-color: var(--border-subtle);
}

.drawer-tab-btn.active {
  background-color: var(--accent-primary);
  color: #F4F5F3;
  border-color: var(--accent-primary);
}

.drawer-tab-panel[hidden] {
  display: none !important;
}

.nano-intent-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: -0.75rem 0 1.85rem 0;
  padding: 0.55rem 0.85rem;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-left: 2px solid var(--accent-primary);
}

.nano-telemetry-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.4rem;
  padding: 0.42rem 0.6rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-primary);
}

.nano-status-dot,
.nano-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  background-color: var(--accent-secondary);
}

.nano-status-dot[data-state="available"],
.nano-status-dot[data-state="vertex"],
.nano-dot[data-state="available"],
.nano-dot[data-state="vertex"] {
  background-color: var(--accent-primary);
}

.nano-status-dot[data-state="downloading"],
.nano-status-dot[data-state="downloadable"],
.nano-dot[data-state="downloading"],
.nano-dot[data-state="downloadable"] {
  background-color: var(--accent-secondary);
}

.nano-status-dot[data-state="error"],
.nano-dot[data-state="error"] {
  background-color: var(--accent-danger);
}

.nano-download-box {
  margin: 0.55rem 0 0.75rem;
  padding: 0.65rem 0.75rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--accent-secondary);
  border-left: 3px solid var(--accent-secondary);
}

.nano-progress {
  flex: 1;
  min-width: 90px;
  height: 8px;
  accent-color: var(--accent-primary);
}

.nano-intent-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.7rem;
}

.nano-intent-pill {
  font-size: 0.875rem;
  padding: 0.24rem 0.6rem;
}

.nano-cache-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.55rem;
  margin-bottom: 0.55rem;
  background-color: var(--bg-primary);
  border: 1px dashed var(--accent-secondary);
}

.nano-route-trace {
  padding: 0.45rem 0.6rem;
  margin-bottom: 0.55rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-left: 2px solid var(--accent-primary);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--ink-secondary);
  white-space: pre-wrap;
  word-break: break-word;
}

.nano-chat-stream {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  max-height: 290px;
  overflow-y: auto;
  padding: 0.55rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  margin-bottom: 0.65rem;
}

.nano-msg {
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border-subtle);
  background-color: var(--surface-card);
  font-size: 0.8125rem;
  line-height: 1.5;
}

.nano-msg-user {
  border-left: 2px solid var(--accent-secondary);
}

.nano-msg-agent {
  border-left: 2px solid var(--accent-primary);
}

.nano-msg-error {
  border-left: 2px solid var(--accent-danger);
}

.nano-msg-meta {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-secondary);
  margin-bottom: 0.22rem;
}

.nano-msg-body {
  color: var(--ink-primary);
  white-space: pre-wrap;
  word-break: break-word;
}

.nano-msg-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.4rem;
}

.nano-prompt-form {
  padding-top: 0.55rem;
  border-top: 1px solid var(--border-subtle);
}

.nano-prompt-textarea {
  width: 100%;
  resize: vertical;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  padding: 0.45rem 0.6rem;
  background-color: var(--surface-card);
  color: var(--ink-primary);
  border: 1px solid var(--border-subtle);
}

.nano-prompt-textarea:focus {
  outline: 1px solid var(--accent-primary);
  border-color: var(--accent-primary);
}

.nano-design-card {
  padding: 0.65rem 0.75rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-left: 2px solid var(--accent-primary);
}

/* ==========================================================================
   STORY PACKAGE ARCHITECTURE, INLINE PRESET RUNNER & CODE DRAWERS
   ========================================================================== */
.story-package-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
  margin-bottom: 3rem;
}

.story-package-card {
  padding: 0;
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
  container-type: inline-size;
}

.story-package-media {
  margin: 0;
  padding: 0;
  border-bottom: 1px solid var(--border-subtle);
  background-color: var(--bg-secondary);
}

.story-package-img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  max-height: 320px;
  object-fit: cover;
  display: block;
}

.story-package-caption {
  padding: 0.55rem 1.35rem;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  color: var(--ink-secondary);
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-subtle);
  line-height: 1.45;
}

.story-package-body {
  padding: 1.4rem 1.5rem 1.5rem;
  min-width: 0;
}

.story-package-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}

.story-package-title {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 1rem + 1.4vw, 1.65rem);
  line-height: 1.24;
  margin: 0 0 0.55rem 0;
  color: var(--ink-primary);
  overflow-wrap: break-word;
}

.story-package-blurb {
  font-size: 0.96rem;
  line-height: 1.62;
  color: var(--ink-secondary);
  margin: 0 0 1.15rem 0;
  max-width: 68ch;
}

.story-package-sandbox {
  padding: 1rem 1.15rem;
  margin-bottom: 1.15rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--accent-primary);
  min-width: 0;
}

.story-preset-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-top: 0.55rem;
}

.story-preset-pill {
  white-space: normal;
  text-align: left;
  line-height: 1.35;
}

.story-sim-output {
  margin-top: 0.85rem;
  padding: 0.75rem 0.95rem;
  background-color: var(--code-bg);
  color: var(--code-ink);
  border: 1px solid var(--border-subtle);
  border-left: 2px solid var(--accent-secondary);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.55;
  overflow-x: auto;
  max-width: 100%;
  box-sizing: border-box;
}

.story-package-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  padding: 0.85rem 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 0.9rem;
}

.story-code-drawer {
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-primary);
  min-width: 0;
  max-width: 100%;
}

.story-code-summary {
  padding: 0.68rem 0.95rem;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  user-select: none;
}

.story-code-summary::-webkit-details-marker {
  display: none;
}

.story-code-summary:hover {
  background-color: var(--bg-secondary);
  color: var(--accent-primary);
}

.story-code-body {
  padding: 0.95rem 1.05rem;
  border-top: 1px solid var(--border-subtle);
  min-width: 0;
  max-width: 100%;
}

.arcade-story-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 0.95rem 1.25rem;
  margin-bottom: 1.5rem;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--accent-secondary);
}

.arcade-probe-readout {
  word-break: break-word;
  overflow-wrap: anywhere;
  min-width: 0;
  max-width: 100%;
}

/* Container & Mobile Viewport Wrapping for Story Package Cards and Arcade Controls */
@container (max-width: 560px) {
  .story-package-body {
    padding: 1.05rem 1rem 1.15rem;
  }
  .story-package-caption {
    padding: 0.5rem 1rem;
  }
  .story-package-nav,
  .story-preset-bar,
  .arcade-hud {
    flex-direction: column;
    align-items: stretch;
  }
  .story-package-nav .btn-exhibition,
  .story-preset-bar .btn-exhibition,
  .arcade-hud .btn-exhibition {
    white-space: normal;
    text-align: left;
    justify-content: flex-start;
    width: 100%;
  }
}

@media (max-width: 720px) {
  .btn-exhibition {
    white-space: normal;
    text-align: left;
  }
  .story-package-body {
    padding: 1.1rem 1rem 1.2rem;
  }
  .story-package-nav,
  .story-preset-bar,
  .arcade-story-strip {
    flex-direction: column;
    align-items: stretch;
  }
  .arcade-hud {
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem 0.9rem;
  }
}

/* ==========================================================================
   UI REFRESH COMPONENTS (settings menu, rail, footer, home, essays, arcade,
   drawer, essay reading page). Type floor: meta >= 0.8125rem, controls >= 0.875rem.
   ========================================================================== */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

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

/* Topbar: Ask + a single settings button */
.topbar-ask {
  padding: 0.32rem 0.8rem;
}

.settings-btn {
  justify-content: center;
  width: 36px;
  height: 34px;
  padding: 0;
  font-size: 1.05rem;
  border-left-width: 1px;
}

.palette-popover {
  min-width: 240px;
  padding: 0.6rem;
  gap: 0.75rem;
}

.settings-group {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.settings-group + .settings-group {
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.6rem;
}

.settings-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-secondary);
  padding: 0 0.55rem 0.2rem;
}

.palette-option[aria-pressed="true"] {
  color: var(--text-primary);
  font-weight: 700;
}

.swatch-bamboo {
  background: linear-gradient(135deg, #2C4237 50%, #7C5841 50%);
}

.swatch-indigo {
  background: linear-gradient(135deg, #1E3A8A 50%, #9E473B 50%);
}

.swatch-moss {
  background: linear-gradient(135deg, #141815 50%, #769985 50%);
}

.swatch-celadon {
  background: linear-gradient(135deg, #115E59 50%, #B88664 50%);
}

/* Rail */
.rail-bio {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.rail-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--ink-primary);
  line-height: 1.25;
}

.rail-blurb {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--ink-secondary);
}

.btn-subscribe {
  align-self: flex-start;
}

/* Footer of the center stage */
.stage-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 3.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-hairline);
  font-size: 0.875rem;
  color: var(--ink-secondary);
}

.stage-footer a {
  color: var(--ink-secondary);
}

.link-button {
  appearance: none;
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  color: var(--ink-secondary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  cursor: pointer;
}

.link-button:hover,
.link-quiet:hover {
  color: var(--accent-primary);
}

.link-quiet {
  font-size: 0.875rem;
  color: var(--ink-secondary);
  text-decoration: none;
  white-space: nowrap;
}

.meta-accent {
  color: var(--accent-primary);
  font-weight: 600;
}

/* Section headings */
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.85rem;
  margin-bottom: 0.65rem;
}

.section-head .section-kicker {
  margin: 0;
}

.section-head .link-quiet {
  margin-left: auto;
}

.section-title {
  font-size: 1.45rem;
  margin-bottom: 0.65rem;
}

.code-section {
  margin-bottom: 2.25rem;
}

.jump-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0 0 1.75rem;
}

/* Home: what's new */
.whats-new {
  margin: 0 0 2.25rem;
  padding: 1rem 1.25rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--accent-primary);
}

.whats-new-mode {
  font-size: 0.8125rem;
  color: var(--ink-secondary);
}

.whats-new-status {
  margin: 0;
  font-size: 0.875rem;
  color: var(--ink-secondary);
}

.whats-new-status:empty {
  display: none;
}

.whats-new-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.whats-new-list:empty {
  display: none;
}

.whats-new-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.2rem 0.75rem;
  min-width: 0;
}

.whats-new-meta {
  font-size: 0.8125rem;
  color: var(--ink-secondary);
  min-width: 10rem;
}

.whats-new-item a {
  color: var(--ink-primary);
  text-decoration: none;
  font-weight: 500;
  overflow-wrap: anywhere;
}

.whats-new-item a:hover {
  color: var(--accent-primary);
  text-decoration: underline;
}

/* Home: lead essay (text first, small thumbnail) */
.lead-essay {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 240px);
  gap: 1.75rem;
  align-items: start;
  margin: 0 0 2.5rem;
}

.lead-essay-title {
  font-size: clamp(1.6rem, 1.2rem + 1.4vw, 2.1rem);
  line-height: 1.18;
  margin: 0 0 0.6rem;
}

.lead-essay-title a,
.essay-lead-title a,
.essay-card-title a,
.home-card-title a,
.recent-essay-link {
  color: var(--ink-primary);
  text-decoration: none;
}

.lead-essay-title a:hover,
.essay-lead-title a:hover,
.essay-card-title a:hover,
.home-card-title a:hover,
.recent-essay-link:hover {
  color: var(--accent-primary);
  text-decoration: underline;
}

.lead-essay-dek {
  font-size: 1.02rem;
  line-height: 1.6;
  color: var(--ink-secondary);
  margin: 0 0 0.6rem;
  max-width: 62ch;
}

.lead-essay-meta {
  margin: 0 0 1rem;
}

.lead-essay-thumb {
  margin: 0;
}

.lead-essay-img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--border-hairline);
  display: block;
}

/* Home: recent essays */
.recent-essays {
  margin: 0 0 2.5rem;
}

.table-compact {
  width: 100%;
  border-collapse: collapse;
}

.table-compact th,
.table-compact td {
  padding: 0.75rem 0;
  border-top: 1px solid var(--border-hairline);
  text-align: left;
  vertical-align: baseline;
  font-weight: 400;
}

.table-compact td {
  padding-left: 1rem;
  white-space: nowrap;
}

.recent-essay-link {
  font-family: var(--font-display);
  font-size: 1.15rem;
  line-height: 1.3;
}

.recent-essay-dek {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.875rem;
  color: var(--ink-secondary);
}

/* Home: Arcade + Code cards */
.home-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.home-card {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.home-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.home-card-head .section-kicker {
  margin: 0;
}

.home-card-title {
  font-size: 1.35rem;
  margin: 0;
}

.home-card-blurb {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink-secondary);
}

.home-card-metric {
  margin: 0;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-primary);
}

.home-card-figure {
  margin: 0;
}

.home-card-svg {
  width: 100%;
  height: auto;
  display: block;
}

.home-card-caption {
  margin-top: 0.35rem;
  font-size: 0.8125rem;
  color: var(--ink-secondary);
}

.home-card-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-top: auto;
}

.home-card > .btn-exhibition {
  align-self: flex-start;
  margin-top: auto;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8125rem;
  color: var(--ink-secondary);
  min-width: 0;
  overflow-wrap: anywhere;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  background-color: var(--border-subtle);
}

.status-pill[data-state="ok"] .status-dot {
  background-color: var(--accent-primary);
}

.status-pill[data-state="error"] .status-dot {
  background-color: var(--accent-danger);
}

.status-pill[data-state="error"] {
  color: var(--accent-danger);
}

/* Essays page */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.75rem;
  padding: 1rem 1.25rem;
}

.filter-tags,
.essay-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.filter-search {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.essay-lead {
  margin-bottom: 2rem;
  padding: 1.75rem;
}

.essay-lead-figure {
  margin: 0;
}

.essay-img-link {
  display: block;
}

.essay-lead-img,
.essay-card-img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--border-hairline);
  display: block;
}

.essay-lead-figure figcaption {
  margin-top: 0.4rem;
}

.essay-lead-body {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
}

.essay-lead-title {
  font-size: 1.85rem;
  line-height: 1.18;
  margin: 0.35rem 0 0.55rem;
}

.essay-lead-summary {
  margin: 0;
  font-size: 1rem;
  line-height: 1.62;
  color: var(--ink-secondary);
}

.essay-grid {
  margin-bottom: 2.75rem;
}

.essay-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
}

.essay-card-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}

.essay-card .essay-img-link {
  margin-bottom: 0.85rem;
}

.essay-card-title {
  font-size: 1.35rem;
  margin-bottom: 0.4rem;
}

.essay-card-summary {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--ink-secondary);
}

.essay-card-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-hairline);
}

/* Essay reading page (article.html) */
.essay-meta {
  font-size: 0.875rem;
  margin: 0 0 1.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.essay-cover {
  margin: 0 0 2rem;
}

.series-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 1rem;
  margin: 0 0 1.75rem;
  padding: 0.65rem 0;
  border-top: 1px solid var(--border-hairline);
  font-size: 0.875rem;
  color: var(--ink-secondary);
}

.series-nav a {
  display: inline-flex;
  min-width: 0;
  max-width: 100%;
  gap: 0.3rem;
  color: var(--ink-secondary);
  text-decoration: none;
}

.series-nav a:hover {
  color: var(--accent-primary);
}

.series-nav-position {
  font-weight: 600;
  color: var(--ink-primary);
}

.series-nav-title {
  display: inline-block;
  max-width: 28ch;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  vertical-align: bottom;
}

.essay-adjacent {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 1rem;
  margin: 3rem 0 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-hairline);
}

.essay-adjacent-link {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
  font-size: 0.875rem;
  color: var(--ink-secondary);
  text-decoration: none;
}

.essay-adjacent-link:hover .essay-adjacent-title {
  color: var(--accent-primary);
}

.essay-adjacent-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  line-height: 1.3;
  color: var(--ink-primary);
}

.essay-adjacent-next {
  text-align: right;
  align-items: flex-end;
}

.essay-subscribe {
  margin: 2rem 0;
  padding: 1.5rem 1.75rem;
}

.essay-subscribe h2 {
  font-size: clamp(1.04rem, 1.2vw, 1.14rem);
  font-family: var(--font-sans);
  font-weight: 600;
  margin: 0 0 0.5rem;
}

/* Code page */
.story-sandbox-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.story-package-svg-wrap {
  margin: 0 0 1rem;
}

/* Arcade page */
.arcade-figure {
  margin: 0 0 2.5rem;
}

.arcade-figure > figcaption {
  margin-top: 0.6rem;
}

.arcade-switcher {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 0.85rem;
  padding: 0.9rem 1.25rem;
}

.arcade-switcher-buttons,
.arcade-probe,
.arcade-hud-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  min-width: 0;
}

.arcade-probe-readout[data-state="error"] {
  color: var(--accent-danger);
}

.arcade-story-copy {
  min-width: 0;
}

.arcade-story-copy .section-kicker {
  margin-bottom: 0.2rem;
}

.arcade-story-copy p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink-primary);
}

.arcade-hud-stats {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 1rem;
  color: #B5BFB8;
}

.arcade-hud-stats strong:first-child {
  color: #EAECE9;
}

.arcade-hud-bottom {
  border-top: 1px solid #2A332D;
  border-bottom: none;
}

.hud-val-green {
  color: #8FB39F;
}

.hud-val-amber {
  color: #D29E7A;
}

.hud-val-red {
  color: #E08A7C;
}

.arcade-iframe {
  border: none;
  display: block;
  background: #141815;
}

.nano-explainer {
  padding: 1.25rem;
  margin-top: 0.75rem;
  color: var(--ink-primary);
}

.nano-stage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.nano-stage {
  padding: 0.9rem;
  border-left: 3px solid var(--accent-primary);
}

.nano-stage-green {
  border-left-color: #2C4237;
}

.nano-stage-brown {
  border-left-color: #7C5841;
}

.nano-stage-grey {
  border-left-color: #4A554E;
}

.nano-stage-label {
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--accent-primary);
  margin-bottom: 0.35rem;
}

.nano-stage-api {
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: 0.25rem;
  overflow-wrap: anywhere;
}

.nano-stage p,
.nano-explainer-copy {
  font-size: 0.875rem;
  color: var(--ink-secondary);
  margin: 0 0 0.75rem;
}

.nano-explainer .story-sim-output {
  min-height: 120px;
}

/* Now page */
.changelog-table {
  margin-bottom: 2.5rem;
}

/* Drawer */
.drawer-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.drawer-head .section-kicker {
  margin: 0;
}

.btn-small {
  padding: 0.28rem 0.6rem;
}

.drawer-title {
  font-size: 1.15rem;
  margin: 0 0 0.4rem;
}

.drawer-copy {
  margin: 0 0 1rem;
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--ink-secondary);
}

.drawer-section {
  margin-bottom: 1.15rem;
}

.drawer-og-link {
  display: block;
  margin: 0.45rem 0 0.4rem;
}

.drawer-og-img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--border-subtle);
}

.drawer-note {
  overflow-wrap: anywhere;
}

.drawer-chip-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}

.drawer-json {
  max-height: 260px;
  overflow: auto;
  margin: 0.45rem 0 0;
}

.drawer-status-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.drawer-link {
  font-size: 0.8125rem;
}

.nano-msg-intro {
  color: var(--ink-secondary);
}

.nano-form-actions {
  margin-top: 0.5rem;
}

.nano-prompt-form .nano-prompt-textarea {
  font-size: 0.9375rem;
}

/* ==========================================================================
   FOLLOW-UP: scrollable wide figures, mobile topbar fit, degraded status
   ========================================================================== */
.figure-scroll {
  overflow-x: auto;
  overscroll-behavior-x: contain;
}

.scroll-hint {
  display: none;
}

/* Mobile: diagrams keep a 700px minimum so 12-unit SVG text renders at 11px or larger
   (12 x 700 / 760 = 11.05px). The figure scrolls sideways instead of shrinking. */
:root[data-format="mobile"] .figure-scroll > svg {
  min-width: 700px;
}

:root[data-format="mobile"] .scroll-hint {
  display: block;
  margin: 0 0 0.35rem;
  text-align: right;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  color: var(--ink-secondary);
}

/* Ask moves into the settings menu on mobile so all four nav links fit the row. */
.settings-ask-group {
  display: none;
}

.settings-ask-group + .settings-group {
  border-top: none;
  padding-top: 0;
}

:root[data-format="mobile"] .settings-ask-group {
  display: flex;
}

:root[data-format="mobile"] .settings-ask-group + .settings-group {
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.6rem;
}

:root[data-format="mobile"] .topbar-ask {
  display: none;
}

.settings-ask {
  font-weight: 600;
}

/* Mobile topbar: brand + Essays/Code/Arcade/Now + settings fit 390px, no nav scrolling. */
:root[data-format="mobile"] .topbar {
  padding: 0 0.5rem;
  gap: 0.375rem;
}

:root[data-format="mobile"] .topbar-left {
  gap: 0.375rem;
}

:root[data-format="mobile"] .brand-title {
  font-size: 0.92rem;
  letter-spacing: -0.01em;
}

:root[data-format="mobile"] .primary-nav {
  gap: 0;
  mask-image: none;
}

:root[data-format="mobile"] .primary-nav .nav-link {
  font-size: 0.875rem;
  padding: 0.3rem 0.28rem;
}

.arcade-probe-readout[data-state="degraded"] {
  color: var(--accent-secondary);
}

.story-package-svg-wrap {
  width: 100%;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-hairline);
}

/* Blueprint diagrams from domain.py use 11-unit labels on a 760 viewBox: native width keeps them at 11px on mobile. */
:root[data-format="mobile"] .figure-scroll-dense > svg {
  min-width: 760px;
}

/* Quiet signal-dot line for the overall arcade status (not a pill). */
.signal-line {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  color: var(--ink-secondary);
}

.signal-line[data-state="ok"] .status-dot,
.status-pill[data-state="ok"] .status-dot {
  background-color: var(--accent-primary);
}

.signal-line[data-state="degraded"] .status-dot,
.status-pill[data-state="degraded"] .status-dot {
  background-color: var(--accent-secondary);
}

.signal-line[data-state="error"] .status-dot {
  background-color: var(--accent-danger);
}

/* Neutral = not checked yet: muted dot, normal ink, never error red. */
.signal-line[data-state="neutral"] .status-dot,
.status-pill[data-state="neutral"] .status-dot {
  background-color: var(--border-subtle);
}

.arcade-probe-readout[data-state="neutral"],
.status-pill[data-state="neutral"] {
  color: var(--ink-secondary);
}

[data-probe-state][data-state="error"] {
  color: var(--accent-danger);
}


/* ==========================================================================
   ESSAY PAGES: keep Substack embeds inside the reading column (no sideways scroll)
   Substack HTML can close .prose-monograph early, so the rules also apply to .reading-column.
   ========================================================================== */
.reading-column,
.prose-monograph {
  min-width: 0;
  max-width: 100%;
  overflow-wrap: break-word;
}

:is(.prose-monograph, .reading-column) picture,
:is(.prose-monograph, .reading-column) a.image-link,
:is(.prose-monograph, .reading-column) figure,
:is(.prose-monograph, .reading-column) .captioned-image-container,
:is(.prose-monograph, .reading-column) iframe,
:is(.prose-monograph, .reading-column) video,
:is(.prose-monograph, .reading-column) pre,
:is(.prose-monograph, .reading-column) table {
  max-width: 100%;
}

:is(.prose-monograph, .reading-column) picture,
:is(.prose-monograph, .reading-column) a.image-link {
  display: block;
}

:is(.prose-monograph, .reading-column) figure,
:is(.prose-monograph, .reading-column) .captioned-image-container {
  width: auto;
  margin-left: 0;
  margin-right: 0;
}

:is(.prose-monograph, .reading-column) img,
.reading-column picture img,
:is(.prose-monograph, .reading-column) source {
  max-width: 100%;
  height: auto;
}

:is(.prose-monograph, .reading-column) pre,
:is(.prose-monograph, .reading-column) table {
  overflow-x: auto;
}

:is(.prose-monograph, .reading-column) table {
  display: block;
}

/* Essay page: "The code behind this essay" card */
.essay-code-card {
  margin: 2rem 0;
  padding: 1rem 1.15rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-left: 2px solid var(--accent-secondary);
  border-radius: 2px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--ink-primary);
}

.essay-code-card h2,
.essay-code-card h3 {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.35rem;
}

.essay-code-card p {
  margin: 0 0 0.6rem;
  color: var(--ink-secondary);
}

.essay-code-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.essay-code-links a {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-primary);
  text-decoration: none;
  padding: 0.2rem 0;
}

.essay-code-links a:hover,
.essay-code-links a:focus-visible {
  text-decoration: underline;
}

/* Sample output in the essay code card scrolls inside its box, never the page. */
.story-code-drawer pre {
  max-width: 100%;
  overflow-x: auto;
}

/* ==========================================================================
   ACCESSIBILITY, SKIP LINK, BREADCRUMBS, MODERN TYPOGRAPHY & REDUCED MOTION
   ========================================================================== */

html {
  scrollbar-gutter: stable;
}

h1, h2, h3, h4 {
  text-wrap: balance;
}

p, li, dd {
  text-wrap: pretty;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 0.75rem;
  z-index: 9999;
  padding: 0.45rem 0.85rem;
  background: var(--bg-primary);
  color: var(--ink-primary);
  border: 2px solid var(--accent-primary);
  border-radius: 2px;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 0.5rem;
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

.breadcrumb-nav {
  margin: 0 0 0.75rem;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  color: var(--ink-secondary);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb-list li + li::before {
  content: "/";
  margin-right: 0.35rem;
  color: var(--ink-secondary);
}

.breadcrumb-list a {
  color: var(--ink-secondary);
  text-decoration: none;
}

.breadcrumb-list a:hover,
.breadcrumb-list a:focus-visible {
  color: var(--ink-primary);
  text-decoration: underline;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}