/* ==========================================================================
   BEET.VC — THE ROOT OF ALL THINGS
   Theme: Beetroot Gradient (Burgundy → White in Light Mode, Burgundy → Black in Dark Mode)
   ========================================================================== */

:root {
  color-scheme: light dark;

  /* Gradient interpolation tokens per modern-web-guidance (visual-effects) */
  --in-oklab: ;
  --in-oklch: ;

  /* LIGHT MODE: Beetroot Burgundy → Crisp White Gradient Theme */
  --bg-canvas: #ffffff;
  --bg-gradient-top: #74102f;
  --bg-gradient-mid: #f7e8ed;
  --bg-gradient-bottom: #ffffff;
  --page-beet-gradient:
    radial-gradient(125% 65% at 50% -8% var(--in-oklab), rgba(122, 17, 49, 0.34) 0%, rgba(158, 25, 66, 0.14) 42%, rgba(255, 255, 255, 0) 78%),
    linear-gradient(180deg var(--in-oklab), #f9eef2 0%, #fdf8fa 32%, #ffffff 100%);

  --surface-beet-gradient:
    linear-gradient(145deg var(--in-oklab), rgba(130, 17, 52, 0.1) 0%, rgba(255, 255, 255, 0.96) 58%, #ffffff 100%);
  --hero-card-gradient:
    linear-gradient(160deg var(--in-oklab), #6b0f2b 0%, #8e1537 36%, #ffffff 100%);

  --bg-elevated: #ffffff;
  --bg-panel: #faf2f5;
  --bg-subtle: #f2dfe6;
  --bg-glass: rgba(255, 250, 252, 0.86);

  --ink-primary: #1a090f;
  --ink-secondary: #4d2936;
  --ink-muted: #784c5c;
  --ink-faint: #9e7584;

  /* Beetroot Pigments — Deep Burgundy, Betanin Crimson, Root Fiber */
  --beet-burgundy: #6b0f2b;
  --beet-core: #8e1537;
  --beet-bright: #b81d48;
  --beet-deep: #47071b;
  --beet-tint: color-mix(in oklab, oklch(from #8e1537 0.78 c h), white 25%);
  --beet-wash: rgba(138, 18, 53, 0.09);
  --beet-border: rgba(122, 17, 49, 0.28);

  /* Botanical & Telemetry Accents */
  --leaf-moss: #19613b;
  --leaf-wash: rgba(25, 97, 59, 0.1);
  --amber-soil: #9e5312;
  --amber-wash: rgba(158, 83, 18, 0.12);

  /* Structural Hairlines & 3:1 UI Component Boundaries */
  --border-hairline: #e5cdd5;
  --border-strong: #9e6d7e;
  --border-ink: #38121f;

  /* Multi-layered Realistic Depth Shadows */
  --shadow-soft:
    0 1px 2px rgba(71, 7, 27, 0.05),
    0 8px 20px -4px rgba(107, 15, 43, 0.08),
    0 22px 44px -10px rgba(107, 15, 43, 0.08);
  --shadow-elevated:
    0 2px 6px rgba(71, 7, 27, 0.08),
    0 16px 34px -6px rgba(107, 15, 43, 0.14),
    0 36px 72px -12px rgba(107, 15, 43, 0.18);

  /* Typography Stacks */
  --font-serif: "Newsreader", "Instrument Serif", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --font-sans: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  /* Layout Rhythm */
  --max-w: 84rem;
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
}

@supports (background: linear-gradient(in oklab, white, black)) {
  :root {
    --in-oklab: in oklab;
    --in-oklch: in oklch;
  }
}

/* DARK MODE: Beetroot Burgundy → Pure Obsidian Black Gradient Theme */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-canvas: #050203;
    --bg-gradient-top: #6b0f2b;
    --bg-gradient-mid: #240510;
    --bg-gradient-bottom: #050203;
    --page-beet-gradient:
      radial-gradient(120% 60% at 50% -5% var(--in-oklab), rgba(158, 22, 64, 0.52) 0%, rgba(92, 10, 35, 0.28) 45%, rgba(5, 2, 3, 0) 80%),
      linear-gradient(180deg var(--in-oklab), #2e0613 0%, #120308 38%, #050203 100%);

    --surface-beet-gradient:
      linear-gradient(145deg var(--in-oklab), rgba(142, 21, 55, 0.24) 0%, rgba(20, 6, 12, 0.94) 58%, #080305 100%);
    --hero-card-gradient:
      linear-gradient(160deg var(--in-oklab), #7a1131 0%, #380717 48%, #060204 100%);

    --bg-elevated: #11060a;
    --bg-panel: #1a0910;
    --bg-subtle: #280d18;
    --bg-glass: rgba(14, 4, 8, 0.85);

    --ink-primary: #fdf7f9;
    --ink-secondary: #debcc8;
    --ink-muted: #a67c8b;
    --ink-faint: #734d5b;

    --beet-burgundy: #9e1942;
    --beet-core: #e6396b;
    --beet-bright: #ff5c8a;
    --beet-deep: #6b0f2b;
    --beet-wash: rgba(230, 57, 107, 0.16);
    --beet-border: rgba(230, 57, 107, 0.42);

    --leaf-moss: #48c782;
    --leaf-wash: rgba(72, 199, 130, 0.15);
    --amber-soil: #f0a14b;
    --amber-wash: rgba(240, 161, 75, 0.15);

    --border-hairline: #361320;
    --border-strong: #9e5b72;
    --border-ink: #f5d5e0;

    --shadow-soft:
      0 1px 2px rgba(0, 0, 0, 0.45),
      0 10px 24px -4px rgba(0, 0, 0, 0.65),
      0 24px 48px -10px rgba(107, 15, 43, 0.28);
    --shadow-elevated:
      0 2px 8px rgba(0, 0, 0, 0.65),
      0 18px 40px -6px rgba(0, 0, 0, 0.8),
      0 40px 80px -12px rgba(230, 57, 107, 0.24);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg-canvas: #050203;
  --bg-gradient-top: #6b0f2b;
  --bg-gradient-mid: #240510;
  --bg-gradient-bottom: #050203;
  --page-beet-gradient:
    radial-gradient(120% 60% at 50% -5% var(--in-oklab), rgba(158, 22, 64, 0.52) 0%, rgba(92, 10, 35, 0.28) 45%, rgba(5, 2, 3, 0) 80%),
    linear-gradient(180deg var(--in-oklab), #2e0613 0%, #120308 38%, #050203 100%);

  --surface-beet-gradient:
    linear-gradient(145deg var(--in-oklab), rgba(142, 21, 55, 0.24) 0%, rgba(20, 6, 12, 0.94) 58%, #080305 100%);
  --hero-card-gradient:
    linear-gradient(160deg var(--in-oklab), #7a1131 0%, #380717 48%, #060204 100%);

  --bg-elevated: #11060a;
  --bg-panel: #1a0910;
  --bg-subtle: #280d18;
  --bg-glass: rgba(14, 4, 8, 0.85);

  --ink-primary: #fdf7f9;
  --ink-secondary: #debcc8;
  --ink-muted: #a67c8b;
  --ink-faint: #734d5b;

  --beet-burgundy: #9e1942;
  --beet-core: #e6396b;
  --beet-bright: #ff5c8a;
  --beet-deep: #6b0f2b;
  --beet-wash: rgba(230, 57, 107, 0.16);
  --beet-border: rgba(230, 57, 107, 0.42);

  --leaf-moss: #48c782;
  --leaf-wash: rgba(72, 199, 130, 0.15);
  --amber-soil: #f0a14b;
  --amber-wash: rgba(240, 161, 75, 0.15);

  --border-hairline: #361320;
  --border-strong: #9e5b72;
  --border-ink: #f5d5e0;

  --shadow-soft:
    0 1px 2px rgba(0, 0, 0, 0.45),
    0 10px 24px -4px rgba(0, 0, 0, 0.65),
    0 24px 48px -10px rgba(107, 15, 43, 0.28);
  --shadow-elevated:
    0 2px 8px rgba(0, 0, 0, 0.65),
    0 18px 40px -6px rgba(0, 0, 0, 0.8),
    0 40px 80px -12px rgba(230, 57, 107, 0.24);
}

:root[data-theme="light"] {
  color-scheme: light;
}

/* Forced Colors Mode Fallback per modern-web-guidance (color) */
@media (forced-colors: active) {
  :root {
    --border-hairline: CanvasText;
    --border-strong: CanvasText;
    --beet-core: Highlight;
  }
  .btn-primary,
  .tag-pill,
  .tool-tab[aria-selected="true"] {
    outline: 2px solid Highlight;
  }
}

/* ==========================================================================
   RESET & TYPOGRAPHY FOUNDATIONS
   ========================================================================== */

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

html {
  container-type: scroll-state;
  scroll-behavior: smooth;
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
}

:target {
  scroll-margin-top: 4.5rem;
}

body {
  margin: 0;
  background-color: var(--bg-canvas);
  background-image: var(--page-beet-gradient);
  background-attachment: fixed;
  color: var(--ink-primary);
  font-family: var(--font-sans);
  line-height: 1.55;
  text-align: start;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  position: relative;
  transition: background-color 0.28s ease, color 0.28s ease;
}

/* Top Burgundy Crown Ribbon — "From the Root to the Surface" */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  z-index: 60;
  background: linear-gradient(90deg var(--in-oklab), #47071b 0%, #8e1537 35%, #e6396b 68%, #6b0f2b 100%);
}

::selection {
  background-color: var(--beet-core);
  color: #ffffff;
}

/* Heading & Copy Wrapping per modern-web-guidance (typography / improve-text-layout-and-legibility) */
h1,
h2,
h3,
h4,
.balance-heading {
  text-wrap: balance;
  margin-top: 0;
  color: var(--ink-primary);
}

p,
blockquote,
li,
.pretty-copy {
  text-wrap: pretty;
}

p {
  max-width: 72ch;
  margin-top: 0;
}

a {
  color: inherit;
  text-decoration-color: var(--beet-border);
  text-underline-offset: 0.22em;
  transition: color 0.18s ease, text-decoration-color 0.18s ease;
}

a:hover {
  color: var(--beet-core);
  text-decoration-color: var(--beet-core);
}

/* ==========================================================================
   COMPACT STICKY NAVIGATION BAR (Under 12% viewport height, scroll-state aware)
   ========================================================================== */

.top-bar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-hairline);
  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1), background-color 0.25s ease;
}

@container scroll-state((scrolled: bottom) and (scrollable: top)) {
  .top-bar {
    transform: translateY(-100%);
  }
}

.top-bar.is-hidden:not(:focus-within) {
  transform: translateY(-100%);
}

.top-bar:focus-within {
  transform: none;
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0.65rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-weight: 600;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: linear-gradient(135deg var(--in-oklab), var(--beet-bright), var(--beet-burgundy));
  display: grid;
  place-items: center;
  color: #fff;
  border: 1px solid var(--border-strong);
  box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.3);
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  letter-spacing: -0.02em;
  line-height: 1;
}

.brand-badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: var(--beet-wash);
  color: var(--beet-core);
  border: 1px solid var(--beet-border);
  letter-spacing: 0.04em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--ink-secondary);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-links a:hover {
  color: var(--ink-primary);
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--beet-core);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cmd-trigger,
.theme-btn {
  appearance: none;
  background: var(--surface-beet-gradient);
  color: var(--ink-secondary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.38rem 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: border-color 0.18s ease, color 0.18s ease, transform 0.15s ease;
}

.cmd-trigger:hover,
.theme-btn:hover {
  border-color: var(--beet-core);
  color: var(--ink-primary);
}

.btn-primary {
  appearance: none;
  background: linear-gradient(135deg var(--in-oklab), var(--beet-bright) 0%, var(--beet-burgundy) 100%);
  color: #ffffff;
  border: 1px solid var(--beet-deep);
  border-radius: var(--radius-sm);
  padding: 0.48rem 0.95rem;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  text-decoration: none;
  box-shadow: 0 3px 12px rgba(107, 15, 43, 0.35);
  transition: transform 0.15s ease, filter 0.15s ease;
}

.btn-primary:hover {
  filter: brightness(1.08);
  color: #ffffff;
  transform: translateY(-1px);
}

.btn-secondary {
  appearance: none;
  background: var(--surface-beet-gradient);
  color: var(--ink-primary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.55rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.btn-secondary:hover {
  border-color: var(--beet-core);
  background: var(--bg-panel);
}

/* ==========================================================================
   LAYOUT CONTAINERS & ARCHIVAL SPECIMEN FRAME
   ========================================================================== */

main {
  position: relative;
  z-index: 1;
}

.section-shell {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 4.5rem 1.5rem;
  border-bottom: 1px solid var(--border-hairline);
}

.eyebrow-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px dashed var(--border-hairline);
}

.eyebrow-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--beet-core);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.eyebrow-tag::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--beet-core);
  display: inline-block;
}

.eyebrow-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-muted);
}

/* ==========================================================================
   HERO SECTION: "THE ROOT OF ALL THINGS" + BEETROOT GRADIENT SPECIMEN
   ========================================================================== */

.hero-shell {
  padding-top: 3rem;
  padding-bottom: 4.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: start;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.32rem 0.8rem;
  border-radius: 999px;
  background: var(--surface-beet-gradient);
  border: 1px solid var(--border-strong);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-secondary);
  margin-bottom: 1.5rem;
}

.hero-kicker-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--beet-core);
  box-shadow: 0 0 0 3px var(--beet-wash);
}

.hero-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.6rem, 1.6rem + 3.6vw, 4.65rem);
  line-height: 1.04;
  letter-spacing: -0.025em;
  margin-bottom: 1.35rem;
}

.hero-title em {
  font-style: italic;
  color: var(--beet-core);
}

.hero-lead {
  font-size: clamp(1.0625rem, 0.95rem + 0.35vw, 1.25rem);
  line-height: 1.6;
  color: var(--ink-secondary);
  margin-bottom: 2rem;
  max-width: 60ch;
}

.anti-portfolio-ledger {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border-hairline);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-soft);
}

.ledger-cell {
  background: var(--surface-beet-gradient);
  padding: 1rem 1.1rem;
}

.ledger-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-muted);
  display: block;
  margin-bottom: 0.25rem;
}

.ledger-value {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--ink-primary);
  line-height: 1.15;
  display: block;
}

.ledger-note {
  font-size: 0.75rem;
  color: var(--beet-core);
  font-family: var(--font-mono);
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
}

/* Interactive Beetroot Cross-Section Panel */
.specimen-card {
  background: var(--surface-beet-gradient);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-elevated);
  position: relative;
}

.specimen-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 0.85rem;
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-muted);
}

.specimen-canvas-wrap {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  place-items: center;
  background:
    radial-gradient(circle at 50% 46% var(--in-oklab), rgba(142, 21, 55, 0.22), transparent 72%),
    var(--bg-elevated);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.beet-svg {
  width: 100%;
  max-width: 19rem;
  height: auto;
  overflow: visible;
}

.stratum-node {
  cursor: pointer;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.stratum-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.4rem;
  margin-top: 1rem;
}

.stratum-btn {
  appearance: none;
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-secondary);
  cursor: pointer;
  text-align: center;
  transition: all 0.18s ease;
}

.stratum-btn[aria-pressed="true"] {
  background: linear-gradient(135deg var(--in-oklab), var(--beet-bright), var(--beet-burgundy));
  color: #ffffff;
  border-color: var(--beet-deep);
  font-weight: 600;
}

.stratum-readout {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--bg-panel);
  border-left: 3px solid var(--beet-core);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.stratum-readout-Header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.stratum-depth {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--beet-core);
  font-weight: 600;
}

.stratum-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0;
}

.stratum-desc {
  font-size: 0.85rem;
  color: var(--ink-secondary);
  margin: 0 0 0.5rem 0;
}

.stratum-rule {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-primary);
  background: var(--bg-elevated);
  padding: 0.45rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-hairline);
}

/* ==========================================================================
   SECTION 01: INTERACTIVE FOUNDER WORKBENCH (4 LIVE DIAGNOSTIC TOOLS)
   ========================================================================== */

.section-header-split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: end;
  margin-bottom: 2.5rem;
}

.section-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2rem, 1.35rem + 2.2vw, 3.25rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-bottom: 0;
}

.section-subtitle {
  color: var(--ink-secondary);
  font-size: 1rem;
  margin: 0;
}

.workbench-frame {
  background: var(--surface-beet-gradient);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.tool-tablist {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-strong);
}

.tool-tab {
  appearance: none;
  background: transparent;
  border: none;
  border-right: 1px solid var(--border-hairline);
  padding: 1rem 1.1rem;
  text-align: start;
  cursor: pointer;
  color: var(--ink-secondary);
  transition: background-color 0.18s ease, color 0.18s ease;
}

.tool-tab:last-child {
  border-right: none;
}

.tool-tab:hover {
  background: var(--bg-subtle);
  color: var(--ink-primary);
}

.tool-tab[aria-selected="true"] {
  background: var(--bg-elevated);
  color: var(--ink-primary);
  box-shadow: inset 0 3px 0 var(--beet-core);
}

.tool-tab-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--beet-core);
  display: block;
  margin-bottom: 0.2rem;
}

.tool-tab-name {
  font-weight: 600;
  font-size: 0.9rem;
  display: block;
}

.tool-panel {
  padding: 2rem;
}

.tool-panel[hidden] {
  display: none;
}

.simulator-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 2.25rem;
  align-items: start;
}

.control-group {
  margin-bottom: 1.25rem;
}

.control-label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.4rem;
}

.control-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink-primary);
}

.control-readout {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--beet-core);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--beet-core);
  cursor: pointer;
}

.preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.preset-chip {
  appearance: none;
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.preset-chip:hover,
.preset-chip.is-active {
  background: var(--beet-wash);
  border-color: var(--beet-core);
  color: var(--beet-core);
  font-weight: 600;
}

.telemetry-box {
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.telemetry-kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.kpi-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
  padding: 0.85rem;
}

.kpi-title {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--ink-muted);
  display: block;
  margin-bottom: 0.25rem;
}

.kpi-num {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  line-height: 1.1;
  color: var(--ink-primary);
  font-weight: 500;
}

.cap-bar-stack {
  height: 1.6rem;
  border-radius: var(--radius-sm);
  overflow: hidden;
  display: flex;
  border: 1px solid var(--border-strong);
  margin-bottom: 0.75rem;
}

.cap-seg-founders {
  background: var(--beet-core);
  transition: width 0.25s ease;
}

.cap-seg-seed {
  background: var(--amber-soil);
  transition: width 0.25s ease;
}

.cap-seg-series-a {
  background: var(--leaf-moss);
  transition: width 0.25s ease;
}

.cap-seg-pool {
  background: var(--ink-muted);
  transition: width 0.25s ease;
}

.cap-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-secondary);
  margin-bottom: 1rem;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.legend-swatch {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 2px;
  display: inline-block;
}

.diagnostic-verdict {
  padding: 0.9rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  font-size: 0.85rem;
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
}

.verdict-icon {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--beet-core);
  flex-shrink: 0;
}

/* Accessible visually-hidden table fallback for charts per modern-web-guidance */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* PMF Signal Audit Grid */
.pmf-checklist {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.pmf-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.9rem;
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.pmf-item:hover {
  border-color: var(--beet-core);
}

.pmf-item input[type="checkbox"] {
  width: 1.1rem;
  height: 1.1rem;
  margin-top: 0.15rem;
  accent-color: var(--beet-core);
  flex-shrink: 0;
}

.pmf-item-title {
  font-weight: 600;
  font-size: 0.875rem;
  display: block;
  margin-bottom: 0.15rem;
}

.pmf-item-sub {
  font-size: 0.78rem;
  color: var(--ink-secondary);
  display: block;
}

/* Cold Email Tear-Down Compare */
.pitch-compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.pitch-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 1.35rem;
}

.pitch-card.is-strong {
  border-color: var(--beet-core);
  background: linear-gradient(180deg var(--in-oklab), var(--beet-wash), transparent 45%), var(--bg-panel);
}

.pitch-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  display: inline-block;
  margin-bottom: 0.75rem;
  border: 1px solid var(--border-strong);
}

.pitch-body {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.65;
  background: var(--bg-elevated);
  padding: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-hairline);
  margin-bottom: 1rem;
}

.pitch-highlight {
  background: var(--beet-wash);
  color: var(--beet-core);
  padding: 0.05rem 0.25rem;
  border-radius: 3px;
  font-weight: 600;
}

/* ==========================================================================
   SECTION 02: THE FIELD MANUAL (FILTERABLE ESSAYS & FULL READER MODAL)
   ========================================================================== */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
}

.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.filter-pill {
  appearance: none;
  background: var(--surface-beet-gradient);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 0.4rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-secondary);
  cursor: pointer;
  transition: all 0.16s ease;
}

.filter-pill[aria-pressed="true"] {
  background: linear-gradient(135deg var(--in-oklab), var(--beet-bright), var(--beet-burgundy));
  color: #ffffff;
  border-color: var(--beet-deep);
  font-weight: 600;
}

.manual-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.manual-card {
  background: var(--surface-beet-gradient);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
}

.manual-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
  border-color: var(--beet-core);
}

.manual-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
}

.manual-cat {
  color: var(--beet-core);
  font-weight: 600;
}

.manual-title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  font-weight: 400;
}

.manual-excerpt {
  font-size: 0.875rem;
  color: var(--ink-secondary);
  margin-bottom: 1.25rem;
}

.manual-footer {
  border-top: 1px dashed var(--border-hairline);
  padding-top: 0.9rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.manual-read-btn {
  appearance: none;
  background: none;
  border: none;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--beet-core);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.manual-read-btn:hover {
  text-decoration: underline;
}

/* ==========================================================================
   SECTION 03: THE VC-SPEAK TRANSLATOR & TERM SHEET DECODER (<details>)
   ========================================================================== */

.decoder-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.decoder-item {
  background: var(--surface-beet-gradient);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.decoder-item summary {
  padding: 1.15rem 1.35rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-weight: 600;
  transition: background-color 0.15s ease;
}

.decoder-item summary::-webkit-details-marker {
  display: none;
}

.decoder-item summary:hover {
  background: var(--bg-panel);
}

.decoder-quote {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 400;
}

.decoder-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  background: var(--beet-wash);
  color: var(--beet-core);
  border: 1px solid var(--beet-border);
  white-space: nowrap;
}

.decoder-body {
  padding: 0 1.35rem 1.35rem 1.35rem;
  border-top: 1px dashed var(--border-hairline);
  font-size: 0.9rem;
  color: var(--ink-secondary);
}

.decoder-move {
  margin-top: 0.75rem;
  padding: 0.75rem;
  background: var(--bg-panel);
  border-left: 3px solid var(--leaf-moss);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-primary);
}

/* ==========================================================================
   SECTION 04: THE ROOT OF ALL THINGS MANIFESTO & OPEN OFFICE HOURS
   ========================================================================== */

.manifesto-banner {
  background: var(--surface-beet-gradient);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow-elevated);
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 2.5rem;
  align-items: center;
}

.manifesto-quote {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 1.2rem + 1.5vw, 2.35rem);
  line-height: 1.2;
  margin: 0 0 1rem 0;
}

.office-hours-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 1.75rem;
}

/* ==========================================================================
   NATIVE <dialog> MODALS (Compliant with modern-web-guidance `dialog`)
   ========================================================================== */

/* MANDATORY scroll containment rules from modern-web-guidance `dialog` */
dialog:modal {
  overscroll-behavior: contain;
}

dialog::backdrop {
  overflow: hidden;
  overscroll-behavior: contain;
  background: rgba(18, 3, 8, 0.72);
  backdrop-filter: blur(6px);
}

.modal-sheet {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  background-image: var(--surface-beet-gradient);
  color: var(--ink-primary);
  box-shadow: var(--shadow-elevated);
  max-width: 48rem;
  width: calc(100vw - 2rem);
  max-height: 86vh;
  padding: 0;
}

.modal-header {
  position: sticky;
  top: 0;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border-hairline);
  padding: 1.15rem 1.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  z-index: 2;
}

.modal-body {
  padding: 2rem 1.75rem;
}

.modal-body h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-top: 1.75rem;
  margin-bottom: 0.65rem;
}

.modal-callout {
  margin: 1.25rem 0;
  padding: 1rem 1.25rem;
  background: var(--bg-panel);
  border-left: 3px solid var(--beet-core);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.form-field {
  margin-bottom: 1.1rem;
}

.form-field label {
  display: block;
  font-size: 0.825rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-canvas);
  color: var(--ink-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: 2px solid var(--beet-core);
  outline-offset: 1px;
}

/* Command Palette List */
.cmd-list {
  list-style: none;
  margin: 1rem 0 0 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}

.cmd-item-btn {
  width: 100%;
  text-align: start;
  appearance: none;
  background: var(--bg-panel);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.9rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--ink-primary);
  font-family: var(--font-sans);
  font-size: 0.875rem;
}

.cmd-item-btn:hover,
.cmd-item-btn:focus {
  border-color: var(--beet-core);
  background: var(--beet-wash);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.site-footer {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-muted);
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================== */

@media (max-width: 60rem) {
  .hero-grid,
  .section-header-split,
  .simulator-grid,
  .pitch-compare-grid,
  .manifesto-banner {
    grid-template-columns: 1fr;
  }

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

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

  .nav-links {
    display: none;
  }
}

@media (max-width: 42rem) {
  .manual-grid,
  .decoder-grid,
  .pmf-checklist,
  .telemetry-kpi-grid,
  .anti-portfolio-ledger {
    grid-template-columns: 1fr;
  }

  .tool-tablist {
    grid-template-columns: 1fr;
  }
}