/* ==========================================================================
   UltraMythos Editorial & Product Intelligence Design System
   Custom Maintainable CSS — Strictly Zero Tailwind, Zero Glassmorphism,
   Zero AI Gradients, Mandatory 300px Desktop Sidebar.
   ========================================================================== */

:root {
  --bg-paper: #F9F7F1;
  --bg-card: #FDFCF9;
  --bg-stone: #EDEAE2;
  --bg-sidebar: #F9F7F1;
  --bg-lab: #171717;
  --bg-lab-panel: #1E1E1C;

  --ink-primary: #171717;
  --ink-secondary: #3F3E3A;
  --ink-muted: #686660;
  --ink-on-dark: #F9F7F1;
  --ink-muted-on-dark: #B5B2A8;

  --border-hairline: #D5D0C5;
  --border-strong: #171717;

  --accent-signal: #D83A27;
  --accent-signal-hover: #B22912;
  --accent-signal-tint: #FCEEEB;

  --semantic-moss: #1F5E3B;
  --semantic-moss-tint: #E8F3EC;
  --semantic-ochre: #8C500B;
  --semantic-ochre-tint: #FBF1E4;
  --semantic-prussian: #1B4965;
  --semantic-prussian-tint: #E7F0F6;

  --font-display: 'Newsreader', Georgia, 'Times New Roman', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;

  --sidebar-width: 300px;
  --content-max: 1180px;
}

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

html {
  font-size: 16px;
  background-color: var(--bg-paper);
  color: var(--ink-primary);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  line-height: 1.6;
  color: var(--ink-primary);
  background-color: var(--bg-paper);
  overflow-x: hidden;
}

/* Accessibility & Skip Link */
.um-skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 9999;
  background: var(--ink-primary);
  color: var(--ink-on-dark);
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-decoration: none;
  border: 2px solid var(--accent-signal);
}

.um-skip-link:focus {
  top: 12px;
}

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

a {
  color: var(--ink-primary);
  text-decoration-color: var(--accent-signal);
  text-underline-offset: 3px;
  transition: color 0.15s ease, background-color 0.15s ease;
}

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

/* ==========================================================================
   Core Shell & Mandatory 300px Sidebar Architecture
   ========================================================================== */

.um-shell {
  display: flex;
  min-height: 100vh;
  width: 100%;
  max-width: 100vw;
  position: relative;
}

.um-sidebar {
  width: 300px;
  min-width: 300px;
  max-width: 300px;
  flex: 0 0 300px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-strong);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 200;
  padding: 20px 18px 24px;
}

.um-main-column {
  flex: 1 1 auto;
  min-width: 0;
  max-width: calc(100% - 300px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.um-mobile-topbar {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background-color: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-strong);
  position: sticky;
  top: 0;
  z-index: 150;
}

.um-drawer-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(20, 20, 19, 0.55);
  z-index: 190;
}

.um-sidebar-close-btn {
  display: none;
}

@media (max-width: 1023px) {
  .um-shell {
    flex-direction: column;
  }
  .um-mobile-topbar {
    display: flex;
  }
  .um-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    height: 100vh;
    width: 300px;
    min-width: 300px;
    max-width: 88vw;
    transform: translateX(-105%);
    transition: transform 0.22s ease;
    box-shadow: 6px 0 24px rgba(20, 20, 19, 0.22);
  }
  .um-sidebar.is-open {
    transform: translateX(0);
  }
  .um-drawer-backdrop.is-open {
    display: block;
  }
  .um-sidebar-close-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-card);
    border: 1px solid var(--border-strong);
    color: var(--ink-primary);
    padding: 6px 10px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    cursor: pointer;
  }
  .um-main-column {
    max-width: 100%;
    width: 100%;
  }
}

/* ==========================================================================
   Sidebar Internal Components
   ========================================================================== */

.um-brand-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--border-strong);
}

.um-brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink-primary);
}

.um-brand-text-wrap {
  display: flex;
  flex-direction: column;
}

.um-wordmark-text {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--ink-primary);
}

.um-brand-sub {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  margin-top: 3px;
}

.um-sidebar-tagline {
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--ink-secondary);
  margin: 10px 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-hairline);
}

.um-sidebar-search {
  margin-bottom: 14px;
}

.um-sidebar-search-form {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  padding: 2px 6px 2px 10px;
}

.um-sidebar-search-input {
  border: none;
  background: transparent;
  width: 100%;
  padding: 7px 6px;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--ink-primary);
}

.um-sidebar-search-input:focus {
  outline: none;
}

.um-sidebar-search-kbd {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 2px 5px;
  background: var(--bg-stone);
  border: 1px solid var(--border-hairline);
  color: var(--ink-muted);
  white-space: nowrap;
}

.um-nav-group-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--ink-muted);
  margin: 10px 0 6px;
}

.um-nav-list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.um-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 10px;
  text-decoration: none;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--ink-primary);
  border-left: 3px solid transparent;
  border-radius: 0;
}

.um-nav-link-inner {
  display: flex;
  align-items: center;
  gap: 9px;
}

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

.um-nav-link.is-active {
  background-color: var(--bg-card);
  color: var(--accent-signal);
  font-weight: 600;
  border-left-color: var(--accent-signal);
  border-top: 1px solid var(--border-hairline);
  border-right: 1px solid var(--border-hairline);
  border-bottom: 1px solid var(--border-hairline);
}

.um-nav-count {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--ink-muted);
}

/* Sidebar Featured Resource Callout */
.um-sidebar-callout {
  background-color: var(--bg-card);
  border: 1px solid var(--border-strong);
  padding: 11px 12px;
  margin-bottom: 14px;
}

.um-sidebar-callout-kicker {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--accent-signal);
  display: block;
  margin-bottom: 4px;
}

.um-sidebar-callout-title {
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 6px;
}

.um-sidebar-callout-meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--ink-muted);
  display: block;
}

/* Sidebar Compact Newsletter */
.um-sidebar-newsletter {
  background-color: var(--bg-stone);
  border: 1px solid var(--border-hairline);
  padding: 12px;
  margin-bottom: 14px;
}

.um-sidebar-newsletter h3 {
  font-family: var(--font-display);
  font-size: 0.92rem;
  margin: 0 0 4px;
}

.um-sidebar-newsletter p {
  font-size: 0.75rem;
  line-height: 1.4;
  color: var(--ink-secondary);
  margin: 0 0 8px;
}

.um-sidebar-nl-form {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.um-input {
  width: 100%;
  padding: 7px 9px;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  color: var(--ink-primary);
}

.um-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid var(--border-strong);
  background: var(--ink-primary);
  color: var(--ink-on-dark);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.um-btn:hover {
  background: var(--accent-signal);
  border-color: var(--accent-signal);
  color: var(--ink-on-dark);
}

.um-btn-secondary {
  background: var(--bg-card);
  color: var(--ink-primary);
}

.um-btn-secondary:hover {
  background: var(--bg-stone);
  color: var(--ink-primary);
  border-color: var(--border-strong);
}

.um-btn-signal {
  background: var(--accent-signal);
  border-color: var(--accent-signal);
  color: var(--ink-on-dark);
}

.um-btn-signal:hover {
  background: var(--accent-signal-hover);
  border-color: var(--accent-signal-hover);
}

.um-sidebar-secondary-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  padding-top: 10px;
  border-top: 1px solid var(--border-hairline);
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.um-sidebar-secondary-links a {
  color: var(--ink-muted);
  text-decoration: none;
}

.um-sidebar-secondary-links a:hover {
  color: var(--accent-signal);
  text-decoration: underline;
}

/* ==========================================================================
   Main Content Container & Editorial Header (Section A)
   ========================================================================== */

.um-content-wrap {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 24px 32px 56px;
}

@media (max-width: 767px) {
  .um-content-wrap {
    padding: 16px 16px 40px;
  }
}

.um-editorial-masthead {
  border-bottom: 2px solid var(--border-strong);
  padding-bottom: 18px;
  margin-bottom: 28px;
}

.um-masthead-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-hairline);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-muted);
}

.um-masthead-pillars {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.um-pillar-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ink-primary);
  font-weight: 600;
  text-decoration: none;
}

.um-pillar-dot {
  width: 7px;
  height: 7px;
  background: var(--accent-signal);
  display: inline-block;
}

.um-masthead-promise-row {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 24px;
  align-items: end;
  padding-top: 16px;
}

@media (max-width: 860px) {
  .um-masthead-promise-row {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}

.um-masthead-headline {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 2.3vw, 2.05rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 0;
}

.um-masthead-search-box {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.um-masthead-search-bar {
  display: flex;
  gap: 6px;
}

/* ==========================================================================
   Badges, Metadata & Epistemic Indicators
   ========================================================================== */

.um-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 7px;
  border: 1px solid currentColor;
}

.badge-signal {
  color: var(--accent-signal);
  background: var(--accent-signal-tint);
}

.badge-official {
  color: var(--semantic-prussian);
  background: var(--semantic-prussian-tint);
}

.badge-analysis {
  color: var(--semantic-moss);
  background: var(--semantic-moss-tint);
}

.badge-doc {
  color: var(--semantic-ochre);
  background: var(--semantic-ochre-tint);
}

.um-meta-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-muted);
}

/* ==========================================================================
   Section Headers & Rhythm
   ========================================================================== */

.um-section {
  margin-bottom: 48px;
}

.um-section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  border-top: 2px solid var(--border-strong);
  border-bottom: 1px solid var(--border-hairline);
  padding: 10px 0;
  margin-bottom: 22px;
}

.um-section-title-group {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.um-section-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-signal);
}

.um-section-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.015em;
}

.um-section-subtitle {
  font-size: 0.86rem;
  color: var(--ink-muted);
  margin: 0;
}

/* ==========================================================================
   Section B: Lead Story (Asymmetrical Broadsheet Layout)
   ========================================================================== */

.um-lead-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  padding: 24px;
}

@media (max-width: 920px) {
  .um-lead-grid {
    grid-template-columns: 1fr;
    padding: 18px;
  }
}

.um-lead-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 2.6vw, 2.25rem);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 12px 0 14px;
}

.um-lead-title a {
  text-decoration: none;
}

.um-lead-title a:hover {
  color: var(--accent-signal);
}

.um-lead-deck {
  font-size: 1.02rem;
  line-height: 1.58;
  color: var(--ink-secondary);
  margin: 0 0 16px;
}

.um-lead-why-box {
  background: var(--bg-paper);
  border-left: 3px solid var(--accent-signal);
  padding: 12px 14px;
  margin: 16px 0;
  font-size: 0.88rem;
}

.um-lead-why-box strong {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-signal);
  display: block;
  margin-bottom: 4px;
}

.um-lead-visual {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
}

.um-diagram-svg {
  width: 100%;
  height: auto;
  display: block;
}

.um-figure-caption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.45;
  color: var(--ink-muted);
  margin-top: 6px;
}

/* ==========================================================================
   Section C: Latest Intelligence Ledger (Chronological Release Feed)
   ========================================================================== */

.um-ledger-list {
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
}

.um-ledger-item {
  display: grid;
  grid-template-columns: 118px 180px 1fr auto;
  gap: 16px;
  align-items: start;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-hairline);
}

.um-ledger-item:last-child {
  border-bottom: none;
}

@media (max-width: 860px) {
  .um-ledger-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

.um-ledger-date {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--ink-primary);
}

.um-ledger-area {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--ink-muted);
  display: block;
  margin-top: 2px;
}

.um-ledger-title {
  font-family: var(--font-display);
  font-size: 1.04rem;
  font-weight: 700;
  margin: 0 0 4px;
  line-height: 1.3;
}

.um-ledger-summary {
  font-size: 0.86rem;
  color: var(--ink-secondary);
  margin: 0;
}

.um-ledger-links {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  white-space: nowrap;
}

@media (max-width: 860px) {
  .um-ledger-links {
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
  }
}

/* ==========================================================================
   Section D: AI Tools Discovery Rows (Filterable Directory)
   ========================================================================== */

.um-filter-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--bg-stone);
  border: 1px solid var(--border-strong);
  padding: 12px 16px;
  margin-bottom: 16px;
}

.um-filter-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.um-filter-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--ink-secondary);
}

.um-select {
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  color: var(--ink-primary);
}

.um-tool-rows {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.um-tool-row {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  padding: 16px 20px;
  display: grid;
  grid-template-columns: 230px 1fr 250px;
  gap: 20px;
  align-items: start;
}

@media (max-width: 960px) {
  .um-tool-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

.um-tool-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 0 4px;
}

.um-tool-tagline {
  font-size: 0.88rem;
  color: var(--ink-secondary);
  margin: 0 0 8px;
}

.um-tool-limitation-box {
  background: var(--semantic-ochre-tint);
  border-left: 3px solid var(--semantic-ochre);
  padding: 8px 10px;
  font-size: 0.8rem;
  color: var(--ink-primary);
}

.um-tool-limitation-box strong {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  color: var(--semantic-ochre);
  display: block;
}

.um-tool-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-left: 1px solid var(--border-hairline);
  padding-left: 16px;
}

@media (max-width: 960px) {
  .um-tool-actions {
    border-left: none;
    border-top: 1px solid var(--border-hairline);
    padding-left: 0;
    padding-top: 12px;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
  }
}

/* ==========================================================================
   Section E: Ultra Gadgets & Buying Intelligence Split
   ========================================================================== */

.um-gadget-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

@media (max-width: 860px) {
  .um-gadget-split {
    grid-template-columns: 1fr;
  }
}

.um-dossier-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.um-dossier-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  margin: 10px 0;
  line-height: 1.22;
}

.um-spec-dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 14px;
  margin: 14px 0;
  padding: 12px 0;
  border-top: 1px solid var(--border-hairline);
  border-bottom: 1px solid var(--border-hairline);
  font-size: 0.83rem;
}

.um-spec-dl dt {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--ink-muted);
}

.um-spec-dl dd {
  margin: 0;
  font-family: var(--font-mono);
  color: var(--ink-primary);
}

/* ==========================================================================
   Section F: Responsive Comparison Tables
   ========================================================================== */

.um-table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
}

.um-comp-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
  min-width: 680px;
}

.um-comp-table th,
.um-comp-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border-hairline);
  border-right: 1px solid var(--border-hairline);
}

.um-comp-table th:last-child,
.um-comp-table td:last-child {
  border-right: none;
}

.um-comp-table thead th {
  background: var(--bg-stone);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-primary);
  border-bottom: 2px solid var(--border-strong);
}

.um-comp-table tbody tr:hover {
  background-color: var(--bg-paper);
}

.um-methodology-note {
  background: var(--semantic-prussian-tint);
  border-left: 3px solid var(--semantic-prussian);
  padding: 10px 14px;
  font-size: 0.82rem;
  margin-bottom: 14px;
}

/* ==========================================================================
   Section G: Digital Laboratory (Selective Dark Surface for Utilities)
   ========================================================================== */

.um-lab-surface {
  background: var(--bg-lab);
  color: var(--ink-on-dark);
  border: 2px solid var(--border-strong);
  padding: 24px;
}

.um-lab-surface a {
  color: var(--ink-on-dark);
}

.um-lab-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid #333330;
  padding-bottom: 16px;
  margin-bottom: 20px;
}

.um-lab-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.um-lab-tab {
  background: var(--bg-lab-panel);
  color: var(--ink-muted-on-dark);
  border: 1px solid #3E3E3A;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  cursor: pointer;
}

.um-lab-tab.is-active {
  background: var(--accent-signal);
  color: var(--ink-on-dark);
  border-color: var(--accent-signal);
}

.um-lab-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

@media (max-width: 860px) {
  .um-lab-grid {
    grid-template-columns: 1fr;
  }
}

.um-lab-controls {
  background: var(--bg-lab-panel);
  border: 1px solid #333330;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.um-lab-field label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-on-dark);
  margin-bottom: 6px;
}

.um-lab-field input[type="range"] {
  width: 100%;
  accent-color: var(--accent-signal);
}

.um-lab-field select,
.um-lab-field input[type="number"] {
  width: 100%;
  padding: 8px 10px;
  background: #171717;
  color: var(--ink-on-dark);
  border: 1px solid #4A4945;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.um-lab-output {
  background: #191917;
  border: 1px solid #3E3E3A;
  padding: 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.um-lab-metric-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.um-lab-stat-box {
  background: #111110;
  border: 1px solid #2E2E2B;
  padding: 12px;
}

.um-lab-stat-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  color: var(--ink-muted-on-dark);
  display: block;
}

.um-lab-stat-value {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink-on-dark);
  margin-top: 4px;
  display: block;
}

/* ==========================================================================
   Section H: Evergreen Guides Numbered Index
   ========================================================================== */

.um-guides-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

@media (max-width: 920px) {
  .um-guides-grid {
    grid-template-columns: 1fr;
  }
}

.um-guide-item {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  padding: 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.um-guide-num {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-signal);
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 6px;
  margin-bottom: 10px;
}

/* ==========================================================================
   Article Long-Form Reading Experience
   ========================================================================== */

.um-article-shell {
  display: grid;
  grid-template-columns: minmax(0, 720px) 280px;
  gap: 36px;
  align-items: start;
}

@media (max-width: 1100px) {
  .um-article-shell {
    grid-template-columns: 1fr;
  }
}

.um-article-body {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  padding: 32px;
}

@media (max-width: 640px) {
  .um-article-body {
    padding: 18px;
  }
}

.um-article-h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.45rem);
  line-height: 1.15;
  margin: 14px 0;
}

.um-article-subtitle {
  font-size: 1.08rem;
  line-height: 1.55;
  color: var(--ink-secondary);
  margin-bottom: 18px;
}

.um-article-takeaways {
  background: var(--bg-paper);
  border: 1px solid var(--border-strong);
  border-left: 4px solid var(--accent-signal);
  padding: 16px 20px;
  margin: 22px 0;
}

.um-article-takeaways h2 {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin: 0 0 10px;
  color: var(--accent-signal);
}

.um-article-takeaways ul {
  margin: 0;
  padding-left: 18px;
  font-size: 0.92rem;
}

.um-article-takeaways li {
  margin-bottom: 6px;
}

.um-prose h2 {
  font-family: var(--font-display);
  font-size: 1.42rem;
  margin: 28px 0 12px;
  padding-top: 14px;
  border-top: 1px solid var(--border-hairline);
}

.um-prose p {
  font-size: 1rem;
  line-height: 1.72;
  color: var(--ink-primary);
  margin: 0 0 16px;
  max-width: 68ch;
}

.um-prose code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--bg-stone);
  padding: 2px 5px;
  border: 1px solid var(--border-hairline);
}

.um-article-aside {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.um-aside-box {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  padding: 16px;
}

.um-aside-box h3 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-hairline);
}

/* ==========================================================================
   Footer (Section J) & Toast Notification
   ========================================================================== */

.um-footer {
  background: var(--bg-sidebar);
  border-top: 2px solid var(--border-strong);
  padding: 36px 32px 28px;
  font-size: 0.84rem;
}

@media (max-width: 767px) {
  .um-footer {
    padding: 28px 16px 24px;
  }
}

.um-footer-grid {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-hairline);
}

@media (max-width: 960px) {
  .um-footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 580px) {
  .um-footer-grid {
    grid-template-columns: 1fr;
  }
}

.um-footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 12px;
  color: var(--ink-primary);
}

.um-footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.um-footer-links a {
  text-decoration: none;
  color: var(--ink-secondary);
}

.um-footer-links a:hover {
  color: var(--accent-signal);
  text-decoration: underline;
}

.um-footer-bottom {
  max-width: var(--content-max);
  margin: 18px auto 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
}


/* Responsive Grid Item Min-Width & Overflow Guards */
html, body, .um-shell, .um-main-column, .um-content-wrap {
  max-width: 100%;
  overflow-x: hidden;
}

.um-lead-grid > *,
.um-ledger-item > *,
.um-tool-row > *,
.um-gadget-split > *,
.um-lab-grid > *,
.um-guides-grid > *,
.um-article-shell > *,
.um-masthead-promise-row > *,
.um-spec-dl > *,
.um-footer-grid > * {
  min-width: 0;
  max-width: 100%;
  overflow-wrap: break-word;
  word-wrap: break-word;
}

@media (max-width: 860px) {
  .um-ledger-links {
    white-space: normal !important;
  }
  .um-lab-metric-row {
    grid-template-columns: 1fr;
  }
  .um-spec-dl {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}

.um-status-banner {
  background: var(--semantic-moss-tint);
  border: 1px solid var(--semantic-moss);
  color: var(--ink-primary);
  padding: 12px 16px;
  font-size: 0.84rem;
  margin-top: 10px;
}


/* Supplied UltraMythos brand assets */
.um-brand-mark--compact {
  display: block;
  width: 40px;
  height: auto;
  flex: 0 0 auto;
}
.um-brand-wordmark,
.um-footer-wordmark {
  display: block;
  height: auto;
  max-width: 100%;
}
.um-brand-wordmark {
  width: 210px;
}
.um-brand-wordmark img,
.um-brand-mark--compact img,
.um-footer-wordmark img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
}
.um-brand-header .um-brand-text-wrap {
  min-width: 0;
  gap: 3px;
}
.um-brand-header .um-brand-wordmark {
  width: 210px;
}
.um-mobile-topbar .um-brand-link {
  min-width: 0;
  gap: 0;
}
.um-mobile-topbar .um-brand-wordmark {
  width: 176px;
}
.um-footer-wordmark {
  width: 180px;
}
@media (max-width: 380px) {
  .um-mobile-topbar {
    padding-inline: 12px;
  }
  .um-mobile-topbar .um-brand-link {
    gap: 0;
  }
  .um-mobile-topbar .um-brand-wordmark {
    width: 142px;
  }
}

/* Personal author profile */
.um-author-page {
  max-width: 820px;
  margin: 0 auto;
  padding-bottom: 36px;
}
.um-author-hero {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  align-items: center;
  gap: 24px;
  padding: 8px 0 26px;
  border-bottom: 1px solid var(--border-hairline);
}
.um-author-photo {
  display: block;
  width: 160px;
  height: 160px;
  object-fit: cover;
  object-position: center;
  border: 1px solid var(--border-strong);
}
.um-author-eyebrow {
  display: block;
  margin: 0 0 8px;
  color: var(--accent-signal);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.um-author-lead .um-article-h1 {
  margin: 0 0 12px;
}
.um-author-lead .um-article-subtitle {
  max-width: 620px;
  margin: 0;
}
.um-author-section {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border-hairline);
}
.um-author-section h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 1.65rem;
  line-height: 1.15;
}
.um-author-focus-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.um-author-focus-card {
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
}
.um-author-focus-card h3 {
  margin: 0 0 8px;
  color: var(--accent-signal);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.um-author-focus-card p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.55;
}
.um-author-social-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}
.um-author-social-list a {
  display: inline-block;
  padding: 7px 10px;
  border: 1px solid var(--border-strong);
  text-decoration: none;
}
.um-author-social-list a:hover {
  border-color: var(--accent-signal);
  color: var(--accent-signal);
}
.um-author-home-link {
  display: inline-block;
  margin-top: 22px;
  font-weight: 700;
}
@media (max-width: 767px) {
  .um-author-page {
    padding-bottom: 24px;
  }
  .um-author-hero {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 16px;
  }
  .um-author-photo {
    width: 112px;
    height: 112px;
  }
  .um-author-focus-grid {
    grid-template-columns: 1fr;
  }
}