@import url("https://fonts.googleapis.com/css2?family=Newsreader:opsz,wght@6..72,500;6..72,700&family=Space+Grotesk:wght@400;500;700&display=swap");

:root {
  --tt-radius-xl: 44px;
  --tt-radius-lg: 34px;
  --tt-radius-md: 24px;
  --tt-radius-sm: 999px;
  --tt-shell-height: 72px;
  --tt-font-display: "Newsreader", Georgia, serif;
  --tt-font-sans: "Space Grotesk", "Trebuchet MS", sans-serif;
}

/* ──────────────────────────────────────────────────────────────────────────
   SLP theme token fallbacks.

   When no theme is active (theme-*.css not loaded, or the page is outside
   the SLP tree), these ensure every SLP-bound token resolves to a sensible
   light default. Theme CSS files override these via `html[data-theme="..."]`
   selectors, and the existing `body[data-page]` blocks below layer
   page-specific background tints on top.
   ────────────────────────────────────────────────────────────────────────── */
:root {
  --tt-bg: #f8fbf7;
  --tt-surface: rgba(255, 255, 255, 0.92);
  --tt-surface-soft: rgba(255, 255, 255, 0.82);
  --tt-surface-strong: #ffffff;
  --tt-ink: #071018;
  --tt-muted: #1f3346;
  --tt-border: rgba(7, 16, 24, 0.18);
  --tt-border-strong: rgba(7, 16, 24, 0.32);
  --tt-accent: #0f766e;
  --tt-accent-strong: #1d4ed8;
  --tt-accent-soft: rgba(29, 78, 216, 0.1);
  --tt-button: #071018;
  --tt-button-hover: #1d4ed8;
  --tt-button-text: #ffffff;
  --tt-glow: rgba(29, 78, 216, 0.14);
  --tt-glow-alt: rgba(15, 118, 110, 0.16);
  --tt-connector: rgba(7, 16, 24, 0.14);
  --tt-shadow: 0 26px 70px rgba(7, 16, 24, 0.12);

  /* Dark-UI token namespace used by tt-landing/tt-workspace components. */
  --tt-ui-bg: #09090b;
  --tt-ui-surface: #111113;
  --tt-ui-surface-2: #18181b;
  --tt-ui-surface-3: #27272a;
  --tt-ui-border: #27272a;
  --tt-ui-border-2: #3f3f46;
  --tt-ui-text: #fafafa;
  --tt-ui-text-2: #a1a1aa;
  --tt-ui-text-3: #71717a;
  --tt-ui-accent: #34d399;
  --tt-ui-accent-glow: rgba(52, 211, 153, 0.14);
  --tt-ui-accent-soft: rgba(52, 211, 153, 0.52);
}

/* ──────────────────────────────────────────────────────────────────────────
   Theme: default (explicit named theme).

   Lives here (rather than in assets/themes/theme-default.css) because it
   IS the canonical baseline — re-asserted so that `?theme=default` behaves
   as a first-class theme choice rather than "the absence of a theme".
   Values are identical to the `:root` fallbacks above.
   ────────────────────────────────────────────────────────────────────────── */
:root[data-theme="default"] {
  --tt-font-display: "Newsreader", Georgia, serif;
  --tt-font-sans: "Space Grotesk", "Trebuchet MS", sans-serif;

  --tt-radius-xl: 44px;
  --tt-radius-lg: 34px;
  --tt-radius-md: 24px;
  --tt-radius-sm: 999px;

  --tt-bg: #f8fbf7;
  --tt-surface: rgba(255, 255, 255, 0.92);
  --tt-surface-soft: rgba(255, 255, 255, 0.82);
  --tt-surface-strong: #ffffff;
  --tt-ink: #071018;
  --tt-muted: #1f3346;
  --tt-border: rgba(7, 16, 24, 0.18);
  --tt-border-strong: rgba(7, 16, 24, 0.32);
  --tt-accent: #0f766e;
  --tt-accent-strong: #1d4ed8;
  --tt-accent-soft: rgba(29, 78, 216, 0.1);
  --tt-button: #071018;
  --tt-button-hover: #1d4ed8;
  --tt-button-text: #ffffff;
  --tt-glow: rgba(29, 78, 216, 0.14);
  --tt-glow-alt: rgba(15, 118, 110, 0.16);
  --tt-connector: rgba(7, 16, 24, 0.14);
  --tt-shadow: 0 26px 70px rgba(7, 16, 24, 0.12);

  --tt-ui-bg: #09090b;
  --tt-ui-surface: #111113;
  --tt-ui-surface-2: #18181b;
  --tt-ui-surface-3: #27272a;
  --tt-ui-border: #27272a;
  --tt-ui-border-2: #3f3f46;
  --tt-ui-text: #fafafa;
  --tt-ui-text-2: #a1a1aa;
  --tt-ui-text-3: #71717a;
  --tt-ui-accent: #34d399;
  --tt-ui-accent-glow: rgba(52, 211, 153, 0.14);
  --tt-ui-accent-soft: rgba(52, 211, 153, 0.52);
}

* {
  box-sizing: border-box;
}

body[data-page] {
  --tt-ink: #071018;
  --tt-muted: #1f3346;
  --tt-border: rgba(7, 16, 24, 0.18);
  --tt-surface: rgba(255, 255, 255, 0.92);
  --tt-surface-soft: rgba(255, 255, 255, 0.82);
  --tt-glow: rgba(29, 78, 216, 0.14);
  --tt-glow-alt: rgba(15, 118, 110, 0.16);
  --tt-connector: rgba(7, 16, 24, 0.14);
  --tt-accent: #0f766e;
  --tt-accent-strong: #1d4ed8;
  --tt-accent-soft: rgba(29, 78, 216, 0.1);
  --tt-button: #071018;
  --tt-button-hover: #1d4ed8;
  --tt-button-text: #ffffff;
  --tt-shadow: 0 26px 70px rgba(7, 16, 24, 0.12);
  margin: 0;
  min-height: 100vh;
  color: var(--tt-ink);
  font-family: var(--tt-font-sans);
  background:
    radial-gradient(circle at top left, var(--tt-glow), transparent 24%),
    radial-gradient(circle at bottom right, var(--tt-glow-alt), transparent 28%),
    linear-gradient(180deg, #f8fbf7 0%, #f2f6ff 46%, #edf7f3 100%);
  transition:
    background-color 180ms ease,
    color 180ms ease,
    background 180ms ease;
}

body[data-page="slp"],
body[data-page="slp-collection"] {
  --tt-glow: rgba(15, 118, 110, 0.14);
  --tt-glow-alt: rgba(245, 158, 11, 0.14);
}

body[data-theme="dark"] {
  --tt-ink: #f5fbff;
  --tt-muted: #d8e4ee;
  --tt-border: rgba(203, 213, 225, 0.24);
  --tt-surface: rgba(10, 21, 30, 0.94);
  --tt-surface-soft: rgba(8, 18, 26, 0.88);
  --tt-glow: rgba(34, 197, 94, 0.12);
  --tt-glow-alt: rgba(96, 165, 250, 0.12);
  --tt-connector: rgba(148, 163, 184, 0.28);
  --tt-accent: #5eead4;
  --tt-accent-strong: #93c5fd;
  --tt-accent-soft: rgba(94, 234, 212, 0.12);
  --tt-button: #ecfeff;
  --tt-button-hover: #bfdbfe;
  --tt-button-text: #051018;
  --tt-shadow: 0 30px 80px rgba(0, 0, 0, 0.34);
  background:
    radial-gradient(circle at top left, rgba(34, 197, 94, 0.12), transparent 26%),
    radial-gradient(circle at bottom right, rgba(96, 165, 250, 0.14), transparent 30%),
    linear-gradient(180deg, #071018 0%, #0a1621 46%, #0c1b22 100%);
}

body[data-page] a,
body[data-page] button {
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease,
    box-shadow 160ms ease;
}

body[data-page] a:focus-visible,
body[data-page] button:focus-visible {
  outline: 3px solid var(--tt-accent-strong);
  outline-offset: 3px;
}

.page-frame {
  position: relative;
  max-width: 1220px;
  margin: 0 auto;
  padding: 26px 20px 84px;
}

.page-frame > * {
  position: relative;
  z-index: 1;
}

.page-frame::before {
  content: "";
  position: absolute;
  left: clamp(18px, 3vw, 34px);
  top: 136px;
  bottom: 22px;
  width: 2px;
  border-radius: var(--tt-radius-sm);
  background: linear-gradient(180deg, transparent, var(--tt-connector) 10%, var(--tt-connector) 92%, transparent);
  opacity: 0.92;
  pointer-events: none;
}

.utility-bar {
  position: sticky;
  top: 14px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  padding: 12px 14px;
  border: 1px solid var(--tt-border);
  border-radius: var(--tt-radius-sm);
  background: var(--tt-surface);
  box-shadow: var(--tt-shadow);
  backdrop-filter: blur(18px);
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--tt-ink);
  text-decoration: none;
}

.brand-link__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 16px 22px 16px 22px;
  background: linear-gradient(135deg, var(--tt-accent-strong), var(--tt-accent));
  color: #ffffff;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand-link__text {
  display: grid;
  gap: 2px;
}

.brand-link__text strong {
  font-size: 1rem;
  font-weight: 700;
}

.utility-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.utility-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--tt-border);
  border-radius: var(--tt-radius-sm);
  background: var(--tt-surface-soft);
  color: var(--tt-ink);
  font-weight: 700;
  text-decoration: none;
}

.utility-link:hover,
.utility-link.is-active {
  border-color: var(--tt-accent-strong);
  background: var(--tt-accent-soft);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 42px;
  padding: 6px 8px 6px 10px;
  border: 1px solid var(--tt-border);
  border-radius: var(--tt-radius-sm);
  background: var(--tt-surface-soft);
  color: var(--tt-ink);
  cursor: pointer;
}

.theme-toggle:hover {
  border-color: var(--tt-accent-strong);
  transform: translateY(-1px);
}

.theme-toggle__track {
  position: relative;
  width: 52px;
  height: 28px;
  border-radius: var(--tt-radius-sm);
  background: rgba(7, 16, 24, 0.14);
  flex: 0 0 auto;
}

body[data-theme="dark"] .theme-toggle__track {
  background: rgba(236, 254, 255, 0.24);
}

.theme-toggle__thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--tt-accent-strong), var(--tt-accent));
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.2);
  transform: translateX(0);
}

.theme-toggle[aria-pressed="true"] .theme-toggle__thumb {
  transform: translateX(24px);
}

.theme-toggle__meta {
  display: grid;
  gap: 1px;
  text-align: left;
}

.theme-toggle__eyebrow {
  color: var(--tt-muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.theme-toggle__text {
  font-size: 0.9rem;
  font-weight: 700;
}

.theme-toggle__state {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 58px;
  padding: 7px 10px;
  border-radius: var(--tt-radius-sm);
  background: var(--tt-accent-soft);
  color: var(--tt-ink);
  font-size: 0.8rem;
  font-weight: 700;
}

.hero,
.surface-card,
.split-panel,
.info-card,
.archive-link {
  backdrop-filter: blur(16px);
}

.hero {
  padding: 0;
}

.hero-home {
  padding-top: 6px;
}

.hero-plate,
.surface-card,
.split-panel,
.info-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--tt-border);
  box-shadow: var(--tt-shadow);
}

.hero-plate {
  padding: 34px;
  border-radius: 36px 58px 36px 58px;
  background: linear-gradient(180deg, var(--tt-surface), var(--tt-surface-soft));
}

.surface-card,
.split-panel {
  border-radius: 30px 44px 30px 44px;
  background: linear-gradient(180deg, var(--tt-surface), var(--tt-surface-soft));
}

.info-card {
  padding: 18px;
  border-radius: 24px 34px 24px 34px;
  background: linear-gradient(180deg, var(--tt-surface-soft), var(--tt-surface));
}

.hero-plate::before,
.surface-card::before,
.split-panel::before,
.info-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.48), transparent 34%),
    radial-gradient(circle at top right, var(--tt-accent-soft), transparent 28%);
  pointer-events: none;
}

body[data-theme="dark"] .hero-plate::before,
body[data-theme="dark"] .surface-card::before,
body[data-theme="dark"] .split-panel::before,
body[data-theme="dark"] .info-card::before {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.06), transparent 32%),
    radial-gradient(circle at top right, rgba(147, 197, 253, 0.12), transparent 28%);
}

.hero-grid,
.hero-main,
.hero-side,
.info-stack,
.split-grid,
.card-grid,
.archive-list,
.spotlight-grid,
.activity-card,
.collection-card,
.spotlight-card {
  display: grid;
  gap: 18px;
}

.hero-grid {
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.95fr);
  align-items: start;
}

.hero-main,
.hero-side,
.surface-card > *,
.split-panel > *,
.info-card > * {
  position: relative;
  z-index: 1;
}

.eyebrow,
.section-kicker,
.panel-label {
  margin: 0;
  color: var(--tt-accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.section-kicker {
  color: var(--tt-accent-strong);
}

.panel-label {
  display: inline-block;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--tt-ink);
  font-family: var(--tt-font-display);
  line-height: 0.98;
}

h1 {
  max-width: 11ch;
  font-size: clamp(3rem, 6vw, 5.3rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.35rem);
  font-weight: 700;
}

h3 {
  font-size: 1.75rem;
}

.lead,
.surface-card p,
.section-heading p,
.archive-link span,
.info-card p,
.split-panel p {
  margin: 0;
  color: var(--tt-muted);
  font-size: 1.02rem;
  line-height: 1.75;
}

.hero-note {
  align-self: stretch;
}

.hero-note p {
  font-size: 1.06rem;
  line-height: 1.88;
}

.crumb-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  color: var(--tt-muted);
  font-size: 0.92rem;
}

.crumb-row a,
.text-link,
.archive-link strong {
  color: var(--tt-ink);
  font-weight: 700;
  text-decoration: none;
}

.crumb-row a:hover,
.text-link:hover,
.archive-link:hover strong {
  text-decoration: underline;
}

.stat-row,
.feature-row,
.mini-link-row,
.micro-link-list,
.soft-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.stat-chip,
.pill-tag,
.feature-chip,
.mini-link-row span,
.micro-link,
.soft-list span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 14px;
  border-radius: var(--tt-radius-sm);
  border: 1px solid var(--tt-border);
  background: var(--tt-surface-soft);
  color: var(--tt-ink);
  font-size: 0.83rem;
}

.stat-chip,
.pill-tag {
  font-weight: 700;
  letter-spacing: 0.03em;
}

.feature-chip,
.micro-link,
.soft-list span,
.mini-link-row span {
  color: var(--tt-muted);
}

.split-grid {
  margin-top: 24px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.split-panel {
  min-height: 360px;
  padding: 30px;
  color: inherit;
  text-decoration: none;
}

.panel-note {
  max-width: 34ch;
}

.split-panel-teaching {
  background:
    linear-gradient(180deg, var(--tt-surface), var(--tt-surface-soft)),
    linear-gradient(135deg, rgba(29, 78, 216, 0.12), transparent 60%);
}

.split-panel-slp {
  background:
    linear-gradient(180deg, var(--tt-surface), var(--tt-surface-soft)),
    linear-gradient(135deg, rgba(15, 118, 110, 0.12), transparent 60%);
}

.panel-cta,
.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  gap: 8px;
  padding: 13px 18px;
  border-radius: var(--tt-radius-sm);
  background: var(--tt-button);
  color: var(--tt-button-text);
  font-weight: 700;
  text-decoration: none;
}

.panel-cta:hover,
.button-link:hover {
  background: var(--tt-button-hover);
  color: var(--tt-button-text);
  transform: translateY(-1px);
}

.section-block {
  position: relative;
  margin-top: 38px;
  padding-left: clamp(18px, 4vw, 52px);
}

.section-block::before {
  content: "";
  position: absolute;
  top: 14px;
  left: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--tt-surface);
  border: 3px solid var(--tt-accent);
  box-shadow: 0 0 0 7px var(--tt-accent-soft);
}

.section-heading {
  display: flex;
  gap: 16px;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 18px;
}

.card-grid,
.card-grid-wide {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.spotlight-grid {
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
}

.spotlight-grid--single {
  grid-template-columns: minmax(0, 760px);
}

.surface-card {
  padding: 24px;
}

.card-summary {
  max-width: 40ch;
}

.surface-card:hover,
.split-panel:hover,
.info-card:hover,
.archive-link:hover {
  transform: translateY(-4px);
  box-shadow: 0 34px 84px rgba(7, 16, 24, 0.16);
}

body[data-theme="dark"] .surface-card:hover,
body[data-theme="dark"] .split-panel:hover,
body[data-theme="dark"] .info-card:hover,
body[data-theme="dark"] .archive-link:hover {
  box-shadow: 0 34px 84px rgba(0, 0, 0, 0.42);
}

.card-topline {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.soft-note {
  color: var(--tt-muted);
  font-size: 0.92rem;
}

.course-card {
  border-color: var(--course-accent);
  background:
    linear-gradient(180deg, var(--course-soft), var(--tt-surface-soft));
}

body[data-theme="dark"] .course-card {
  background:
    linear-gradient(180deg, var(--tt-surface), var(--tt-surface-soft));
}

.course-card .button-link {
  background: var(--course-accent);
  color: #ffffff;
}

.course-card .button-link:hover {
  background: var(--course-accent);
  filter: brightness(0.94);
}

.spotlight-card--feature {
  background:
    linear-gradient(135deg, rgba(29, 78, 216, 0.1), transparent 62%),
    linear-gradient(180deg, var(--tt-surface), var(--tt-surface-soft));
}

.spotlight-card--slp {
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.1), transparent 62%),
    linear-gradient(180deg, var(--tt-surface), var(--tt-surface-soft));
}

.empty-card {
  background:
    linear-gradient(135deg, rgba(29, 78, 216, 0.08), transparent 65%),
    linear-gradient(180deg, var(--tt-surface), var(--tt-surface-soft));
}

.archive-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  border: 1px solid var(--tt-border);
  border-radius: 24px 34px 24px 34px;
  background: linear-gradient(180deg, var(--tt-surface), var(--tt-surface-soft));
  text-decoration: none;
}

.archive-link strong {
  font-size: 1.05rem;
}

.tt-shell {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  padding: 12px 18px;
  border-bottom: 1px solid rgba(7, 16, 24, 0.16);
  background: rgba(255, 255, 255, 0.98);
  color: #071018;
  box-shadow: 0 10px 26px rgba(7, 16, 24, 0.12);
  backdrop-filter: blur(14px);
  font-family: var(--tt-font-sans);
  font-size: 0.86rem;
}

body.tt-has-shell {
  padding-top: calc(var(--tt-shell-height) + 18px);
}

.tt-shell__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: min(1180px, 100%);
  margin: 0 auto;
}

.tt-shell--slp {
  border-color: rgba(15, 118, 110, 0.2);
}

.tt-shell__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
}

.tt-shell__brand-text {
  font-weight: 700;
}

.tt-shell__links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.tt-shell__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 10px;
  border-radius: var(--tt-radius-sm);
  background: rgba(29, 78, 216, 0.12);
  color: #1d4ed8;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tt-shell--slp .tt-shell__badge {
  background: rgba(15, 118, 110, 0.12);
  color: #0f766e;
}

.tt-shell__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 15px;
  border: 1px solid rgba(7, 16, 24, 0.16);
  border-radius: var(--tt-radius-sm);
  background: rgba(255, 255, 255, 0.92);
  color: inherit;
  font-size: 0.86rem;
  font-weight: 700;
  text-decoration: none;
}

.tt-shell__link:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.tt-shell__link.is-active {
  background: #071018;
  border-color: #071018;
  color: #ffffff;
}

.tt-shell--slp .tt-shell__link.is-active {
  background: #0f766e;
  border-color: #0f766e;
}

@media (max-width: 1040px) {
  .hero-grid,
  .split-grid,
  .card-grid,
  .card-grid-wide,
  .spotlight-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .utility-bar,
  .section-heading {
    align-items: start;
    flex-direction: column;
  }

  .page-frame::before {
    left: 18px;
    top: 178px;
  }

  h1 {
    max-width: 13ch;
  }
}

@media (max-width: 640px) {
  .page-frame {
    padding: 18px 14px 60px;
  }

  .utility-bar,
  .hero-plate,
  .split-panel,
  .surface-card {
    padding: 18px;
  }

  .section-block {
    padding-left: 28px;
  }

  .tt-shell {
    padding: 10px 12px;
  }

  body.tt-has-shell {
    padding-top: calc(var(--tt-shell-height) + 12px);
  }

  .tt-shell__inner {
    flex-direction: column;
    align-items: start;
  }

  .tt-shell__links {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  body[data-page] a,
  body[data-page] button,
  body[data-page],
  .surface-card,
  .split-panel,
  .info-card,
  .archive-link {
    transition: none;
  }
}

body[data-page="home"],
body[data-page="teaching"],
body[data-page="course"],
body[data-page="slp"],
body[data-page="slp-collection"] {
  --tt-ui-bg: #09090b;
  --tt-ui-surface: #111113;
  --tt-ui-surface-2: #18181b;
  --tt-ui-surface-3: #27272a;
  --tt-ui-border: #27272a;
  --tt-ui-border-2: #3f3f46;
  --tt-ui-text: #fafafa;
  --tt-ui-text-2: #a1a1aa;
  --tt-ui-text-3: #71717a;
  --tt-ui-accent: #818cf8;
  --tt-ui-accent-glow: rgba(129, 140, 248, 0.14);
  --tt-ui-accent-soft: rgba(129, 140, 248, 0.52);
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(129, 140, 248, 0.12), transparent 24%),
    radial-gradient(circle at bottom right, rgba(34, 211, 238, 0.08), transparent 28%),
    linear-gradient(180deg, #09090b 0%, #0d0d12 52%, #111113 100%);
  color: var(--tt-ui-text);
  font-family:
    Inter,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}

body[data-page="slp"],
body[data-page="slp-collection"] {
  --tt-ui-accent: #34d399;
  --tt-ui-accent-glow: rgba(52, 211, 153, 0.14);
  --tt-ui-accent-soft: rgba(52, 211, 153, 0.52);
  background:
    radial-gradient(circle at top left, rgba(52, 211, 153, 0.12), transparent 24%),
    radial-gradient(circle at bottom right, rgba(34, 211, 238, 0.08), transparent 28%),
    linear-gradient(180deg, #09090b 0%, #0d1011 52%, #111312 100%);
}

body[data-theme="light"][data-page="home"],
body[data-theme="light"][data-page="teaching"],
body[data-theme="light"][data-page="course"],
body[data-theme="light"][data-page="slp"],
body[data-theme="light"][data-page="slp-collection"] {
  --tt-ui-bg: #f8fafc;
  --tt-ui-surface: #ffffff;
  --tt-ui-surface-2: #f3f4f6;
  --tt-ui-surface-3: #e5e7eb;
  --tt-ui-border: #d4d4d8;
  --tt-ui-border-2: #cbd5e1;
  --tt-ui-text: #09090b;
  --tt-ui-text-2: #3f3f46;
  --tt-ui-text-3: #52525b;
  background:
    radial-gradient(circle at top left, rgba(129, 140, 248, 0.08), transparent 22%),
    radial-gradient(circle at bottom right, rgba(34, 211, 238, 0.08), transparent 24%),
    linear-gradient(180deg, #f8fafc 0%, #f5f7fb 52%, #eef2f7 100%);
}

body[data-theme="light"][data-page="slp"],
body[data-theme="light"][data-page="slp-collection"] {
  background:
    radial-gradient(circle at top left, rgba(52, 211, 153, 0.08), transparent 22%),
    radial-gradient(circle at bottom right, rgba(34, 211, 238, 0.08), transparent 24%),
    linear-gradient(180deg, #f8fafc 0%, #f5faf7 52%, #eef6f1 100%);
}

.tt-landing-page,
.tt-workspace {
  color: var(--tt-ui-text);
}

.tt-landing-page a,
.tt-landing-page button,
.tt-workspace a,
.tt-workspace button {
  transition:
    background-color 140ms ease,
    border-color 140ms ease,
    color 140ms ease,
    transform 140ms ease,
    box-shadow 140ms ease,
    opacity 140ms ease;
}

.tt-landing-page a:focus-visible,
.tt-landing-page button:focus-visible,
.tt-workspace a:focus-visible,
.tt-workspace button:focus-visible {
  outline: 3px solid var(--tt-ui-accent);
  outline-offset: 3px;
}

.tt-theme-toggle,
.tt-top-link,
.tt-sidebar-toggle,
.tt-sidebar__utility,
.tt-landing-cta,
.tt-landing-backlink {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 14px;
  border-radius: 8px;
  border: 1px solid var(--tt-ui-border);
  background: var(--tt-ui-surface-2);
  color: var(--tt-ui-text-2);
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
}

.tt-theme-toggle:hover,
.tt-top-link:hover,
.tt-sidebar-toggle:hover,
.tt-sidebar__utility:hover,
.tt-landing-cta:hover,
.tt-landing-backlink:hover {
  border-color: var(--tt-ui-border-2);
  color: var(--tt-ui-text);
  transform: translateY(-1px);
}

.tt-top-link.is-active,
.tt-landing-cta {
  background: var(--tt-ui-accent);
  border-color: var(--tt-ui-accent);
  color: #ffffff;
}

.tt-theme-toggle {
  gap: 10px;
  cursor: pointer;
}

.tt-theme-toggle__text {
  white-space: nowrap;
}

.tt-theme-toggle__state {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 56px;
  min-height: 28px;
  padding: 0 8px;
  border-radius: 999px;
  background: var(--tt-ui-surface-3);
  color: var(--tt-ui-text);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* --------------------------------------------------------------------- *
 * Theme picker menu (SLP only)                                           *
 *                                                                         *
 * Used in two nav variants:                                               *
 *   .tt-theme-menu--shell   — activity page shell (white fixed nav)       *
 *   .tt-theme-menu--landing — landing/collection hubs (dark tt-ui panel)  *
 *                                                                         *
 * The dropdown panel uses shared --tt-* tokens so it re-skins under each  *
 * theme automatically. Trigger styles differ per variant so they blend    *
 * into their surrounding chrome.                                          *
 * --------------------------------------------------------------------- */

.tt-theme-menu {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-family: inherit;
}

.tt-theme-menu__trigger {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 40px;
  padding: 0 12px 0 10px;
  border-radius: var(--tt-radius-sm, 999px);
  background: transparent;
  color: inherit;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  border: 1px solid transparent;
  transition:
    transform 140ms ease,
    background-color 140ms ease,
    border-color 140ms ease,
    box-shadow 140ms ease;
}

.tt-theme-menu__trigger:hover {
  transform: translateY(-1px);
}

.tt-theme-menu__trigger:focus-visible {
  outline: 3px solid var(--tt-accent-soft, rgba(15, 118, 110, 0.3));
  outline-offset: 2px;
}

.tt-theme-menu__swatch {
  display: inline-block;
  width: 16px;
  height: 16px;
  border-radius: 999px;
  border: 1px solid rgba(7, 16, 24, 0.14);
  background: currentColor;
  flex-shrink: 0;
}

.tt-theme-menu__caption {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1px;
  text-align: left;
}

.tt-theme-menu__eyebrow {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.62;
}

.tt-theme-menu__label {
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.tt-theme-menu__caret {
  display: inline-block;
  font-size: 0.7rem;
  opacity: 0.7;
  transition: transform 160ms ease;
}

.tt-theme-menu[data-open="true"] .tt-theme-menu__caret {
  transform: rotate(180deg);
}

.tt-theme-menu__list {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 1200;
  min-width: 240px;
  margin: 0;
  padding: 6px;
  list-style: none;
  border-radius: var(--tt-radius-md, 12px);
  border: 1px solid var(--tt-border, rgba(7, 16, 24, 0.14));
  background: var(--tt-surface, #ffffff);
  color: var(--tt-ink, #111827);
  box-shadow: var(--tt-shadow, 0 18px 42px rgba(7, 16, 24, 0.18));
  font-family: var(--tt-font-sans, inherit);
}

.tt-theme-menu__list[hidden] {
  display: none;
}

.tt-theme-menu__item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: calc(var(--tt-radius-md, 12px) - 4px);
  cursor: pointer;
  user-select: none;
  outline: none;
}

.tt-theme-menu__item:hover,
.tt-theme-menu__item:focus-visible {
  background: var(--tt-accent-soft, rgba(15, 118, 110, 0.12));
  color: var(--tt-accent-strong, var(--tt-ink, #111827));
}

.tt-theme-menu__item.is-active {
  background: var(--tt-accent-soft, rgba(15, 118, 110, 0.18));
  color: var(--tt-accent-strong, var(--tt-ink, #111827));
}

.tt-theme-menu__item .tt-theme-menu__swatch {
  width: 22px;
  height: 22px;
  border-color: var(--tt-border, rgba(7, 16, 24, 0.16));
}

.tt-theme-menu__text {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1px;
  min-width: 0;
}

.tt-theme-menu__name {
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.15;
}

.tt-theme-menu__desc {
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--tt-muted, #6b7280);
  line-height: 1.3;
}

.tt-theme-menu__check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--tt-accent, currentColor);
  opacity: 0;
  transform: scale(0.8);
  transition:
    opacity 140ms ease,
    transform 140ms ease;
}

.tt-theme-menu__item.is-active .tt-theme-menu__check {
  opacity: 1;
  transform: scale(1);
}

/* Shell variant — light fixed nav on activity pages */
.tt-theme-menu--shell .tt-theme-menu__trigger {
  border-color: rgba(7, 16, 24, 0.16);
  background: rgba(255, 255, 255, 0.92);
  color: #071018;
}

.tt-theme-menu--shell .tt-theme-menu__trigger:hover {
  border-color: rgba(7, 16, 24, 0.32);
  background: #ffffff;
}

/* Landing/collection variant — dark tt-ui nav */
.tt-theme-menu--landing .tt-theme-menu__trigger {
  border-color: var(--tt-ui-border, rgba(255, 255, 255, 0.14));
  background: var(--tt-ui-surface-2, rgba(15, 23, 42, 0.7));
  color: var(--tt-ui-text-2, #cbd5e1);
}

.tt-theme-menu--landing .tt-theme-menu__trigger:hover {
  border-color: var(--tt-ui-border-2, rgba(255, 255, 255, 0.28));
  color: var(--tt-ui-text, #f8fafc);
}

.tt-theme-menu--landing .tt-theme-menu__trigger:focus-visible {
  outline-color: var(--tt-ui-accent, var(--tt-accent-soft, #34d399));
}

/* Shell sits above other page content; make sure its dropdown floats free. */
.tt-shell .tt-theme-menu__list,
.tt-landing-nav .tt-theme-menu__list {
  right: 0;
  left: auto;
}

.tt-shell__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

@media (max-width: 640px) {
  .tt-theme-menu__list {
    min-width: min(92vw, 280px);
  }

  .tt-shell__actions {
    width: 100%;
    justify-content: space-between;
  }
}

.tt-landing-page {
  width: min(1120px, calc(100vw - 24px));
  margin: 0 auto;
  padding: 18px 0 72px;
}

.tt-landing-nav {
  position: sticky;
  top: 14px;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 0 24px;
}

.tt-landing-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--tt-ui-text-2);
  font-family:
    "JetBrains Mono",
    "SFMono-Regular",
    Consolas,
    monospace;
  font-size: 0.86rem;
  font-weight: 600;
  text-decoration: none;
}

.tt-landing-brand__mark,
.tt-sidebar__mark {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--tt-ui-accent);
  color: #ffffff;
  font-family:
    "JetBrains Mono",
    "SFMono-Regular",
    Consolas,
    monospace;
  font-size: 0.78rem;
  font-weight: 700;
}

.tt-landing-brand__text,
.tt-sidebar__name,
.tt-section-head__count,
.tt-breadcrumb,
.tt-meta-item,
.tt-sidebar__count,
.tt-type-badge {
  font-family:
    "JetBrains Mono",
    "SFMono-Regular",
    Consolas,
    monospace;
}

.tt-landing-nav__actions,
.tt-workspace__topbar-actions,
.tt-focus-chips,
.tt-landing-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.tt-landing-hero,
.tt-entry-card,
.tt-link-card,
.tt-empty-card {
  border: 1px solid var(--tt-ui-border);
  background: linear-gradient(180deg, var(--tt-ui-surface), var(--tt-ui-surface-2));
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.18);
}

body[data-theme="light"] .tt-landing-hero,
body[data-theme="light"] .tt-entry-card,
body[data-theme="light"] .tt-link-card,
body[data-theme="light"] .tt-empty-card {
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.08);
}

.tt-landing-hero {
  max-width: 860px;
  margin: 0 auto;
  padding: clamp(4rem, 10vw, 7rem) clamp(1.25rem, 4vw, 2.5rem);
  border-radius: 12px;
  text-align: center;
}

.tt-landing-badge,
.tt-entry-card__kicker,
.tt-course-hero__tag,
.tt-focus-section h2,
.tt-content-section__head h2,
.tt-sidebar__label,
.tt-section-head h2 {
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tt-landing-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  padding: 6px 12px;
  border: 1px solid var(--tt-ui-border-2);
  border-radius: 999px;
  background: var(--tt-ui-surface-2);
  color: var(--tt-ui-accent);
  font-size: 0.74rem;
  font-weight: 600;
}

.tt-landing-badge__dot,
.tt-entry-card__indicator,
.tt-course-hero__indicator,
.tt-focus-chip__dot,
.tt-sidebar__dot {
  border-radius: 50%;
  background: var(--tt-ui-accent);
  box-shadow: 0 0 12px var(--tt-ui-accent-soft);
}

.tt-landing-badge__dot {
  width: 7px;
  height: 7px;
}

.tt-landing-page h1,
.tt-workspace h1,
.tt-entry-card h3,
.tt-link-card h3,
.tt-empty-card h2 {
  margin: 0;
  color: var(--tt-ui-text);
  letter-spacing: -0.04em;
  line-height: 1.08;
}

.tt-landing-page h1,
.tt-workspace h1 {
  font-size: clamp(2.25rem, 5vw, 4rem);
  font-weight: 700;
}

.tt-entry-card h3,
.tt-link-card h3,
.tt-empty-card h2,
.tt-content-section__head h2 {
  font-size: 1.18rem;
  font-weight: 600;
}

.tt-landing-hero p,
.tt-entry-card p,
.tt-link-card p,
.tt-course-hero__subtitle,
.tt-course-hero__summary,
.tt-simple-copy,
.tt-empty-card p {
  margin: 0;
  color: var(--tt-ui-text-2);
  line-height: 1.65;
}

.tt-landing-hero p {
  max-width: 560px;
  margin: 0 auto 28px;
  font-size: clamp(1rem, 2vw, 1.12rem);
}

.tt-landing-section,
.tt-content-section,
.tt-focus-section {
  margin-top: 30px;
}

.tt-section-head,
.tt-content-section__head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.tt-section-head h2,
.tt-content-section__head h2,
.tt-focus-section h2,
.tt-sidebar__label {
  margin: 0;
  color: var(--tt-ui-text-3);
  font-size: 0.7rem;
  font-weight: 700;
}

.tt-section-head__count,
.tt-content-section__head span,
.tt-sidebar__count,
.tt-meta-item {
  color: var(--tt-ui-text-3);
  font-size: 0.72rem;
}

.tt-entry-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--tt-ui-border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--tt-ui-border);
}

.tt-entry-grid--split {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tt-entry-card {
  position: relative;
  display: grid;
  gap: 16px;
  min-height: 240px;
  padding: 28px;
  color: inherit;
  text-decoration: none;
  overflow: hidden;
}

.tt-entry-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 20%, var(--tt-card-glow, rgba(129, 140, 248, 0.12)) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 180ms ease;
  pointer-events: none;
}

.tt-entry-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--tt-card-accent, var(--tt-ui-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.tt-entry-card > * {
  position: relative;
  z-index: 1;
}

.tt-entry-card:hover::before {
  opacity: 1;
}

.tt-entry-card:hover::after {
  transform: scaleX(1);
}

.tt-entry-card:hover,
.tt-link-card:hover {
  transform: translateY(-2px);
}

.tt-entry-card__indicator {
  width: 8px;
  height: 8px;
  background: var(--tt-card-dim, var(--tt-ui-accent));
}

.tt-entry-card:hover .tt-entry-card__indicator {
  background: var(--tt-card-accent, var(--tt-ui-accent));
}

.tt-entry-card__body {
  display: grid;
  gap: 8px;
}

.tt-entry-card__kicker {
  color: var(--tt-ui-text-3);
  font-size: 0.72rem;
  font-weight: 700;
}

.tt-entry-card__footer,
.tt-link-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.tt-entry-card__meta,
.tt-entry-card__open,
.tt-link-card__open {
  color: var(--tt-ui-text-3);
  font-size: 0.78rem;
  font-weight: 600;
}

.tt-entry-card--muted {
  min-height: 200px;
}

.tt-workspace {
  min-height: 100vh;
}

.tt-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 268px;
  padding: 0 12px 16px;
  border-right: 1px solid var(--tt-ui-border);
  background: var(--tt-ui-surface);
  overflow-y: auto;
  z-index: 50;
}

.tt-sidebar__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 6px;
  color: var(--tt-ui-text);
  text-decoration: none;
}

.tt-sidebar__section {
  padding: 10px 0 6px;
}

.tt-sidebar__stack {
  display: grid;
  gap: 4px;
}

.tt-sidebar__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--tt-ui-text-2);
  font-size: 0.82rem;
  font-weight: 500;
  text-decoration: none;
  position: relative;
}

.tt-sidebar__item:hover {
  background: var(--tt-ui-surface-2);
  color: var(--tt-ui-text);
}

.tt-sidebar__item.is-active {
  background: var(--tt-sidebar-accent-glow, var(--tt-ui-accent-glow));
  color: var(--tt-sidebar-accent, var(--tt-ui-accent));
}

.tt-sidebar__dot {
  width: 6px;
  height: 6px;
  background: var(--tt-sidebar-accent, var(--tt-ui-accent));
}

.tt-sidebar__count {
  margin-left: auto;
}

.tt-sidebar__footer {
  display: grid;
  gap: 8px;
  padding: 14px 0 8px;
}

.tt-sidebar__utility {
  justify-content: flex-start;
}

.tt-workspace__main {
  margin-left: 268px;
  width: calc(100% - 268px);
  padding: 18px clamp(1.25rem, 4vw, 3rem) 72px;
}

.tt-workspace__topbar {
  position: sticky;
  top: 14px;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  padding: 10px 12px;
  border: 1px solid var(--tt-ui-border);
  border-radius: 10px;
  background: var(--tt-ui-surface);
  backdrop-filter: blur(12px);
}

.tt-sidebar-toggle {
  display: none;
}

.tt-main-block {
  display: grid;
  gap: 18px;
}

.tt-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  color: var(--tt-ui-text-3);
  font-size: 0.74rem;
}

.tt-breadcrumb a {
  color: var(--tt-ui-text-3);
  text-decoration: none;
}

.tt-breadcrumb__current {
  color: var(--tt-ui-accent);
}

.tt-course-hero {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--tt-ui-border);
}

.tt-course-hero__indicator-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.tt-course-hero__indicator {
  width: 10px;
  height: 10px;
  background: var(--tt-course-accent, var(--tt-ui-accent));
  box-shadow: 0 0 12px var(--tt-course-accent-glow, var(--tt-ui-accent-soft));
}

.tt-course-hero__tag {
  color: var(--tt-course-accent, var(--tt-ui-accent));
  font-size: 0.72rem;
  font-weight: 700;
}

.tt-course-hero__subtitle {
  font-size: 1rem;
  margin-top: 8px;
}

.tt-course-hero__summary {
  margin-top: 10px;
  max-width: 64ch;
}

.tt-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 18px;
}

.tt-meta-item strong {
  color: var(--tt-ui-text-2);
  font-weight: 700;
}

.tt-focus-chips {
  gap: 8px;
}

.tt-focus-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--tt-ui-border);
  border-radius: 999px;
  background: var(--tt-ui-surface-2);
  color: var(--tt-ui-text-2);
  font-size: 0.8rem;
  font-weight: 500;
}

.tt-focus-chip__dot {
  width: 5px;
  height: 5px;
}

.tt-focus-chips--landing {
  justify-content: center;
  margin-top: 18px;
}

.tt-card-list {
  display: grid;
  gap: 12px;
}

.tt-link-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px;
  border-radius: 10px;
  color: inherit;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.tt-link-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--tt-card-accent, var(--tt-ui-accent));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 180ms ease;
}

.tt-link-card:hover::before {
  transform: scaleY(1);
}

.tt-link-card__icon {
  display: inline-grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border-radius: 10px;
  border: 1px solid var(--tt-ui-border);
  background: var(--tt-card-glow, var(--tt-ui-accent-glow));
  color: var(--tt-card-accent, var(--tt-ui-accent));
  font-family:
    "JetBrains Mono",
    "SFMono-Regular",
    Consolas,
    monospace;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  flex: 0 0 auto;
}

.tt-link-card__body {
  flex: 1;
  display: grid;
  gap: 4px;
}

.tt-link-card__body h3 {
  font-size: 1rem;
}

.tt-link-card__body p {
  font-size: 0.88rem;
}

.tt-link-card__meta {
  flex-direction: column;
  align-items: flex-end;
  justify-content: center;
  min-width: 160px;
}

.tt-type-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid var(--tt-ui-border);
  background: var(--tt-ui-surface-2);
  color: var(--tt-ui-text-3);
  font-size: 0.7rem;
  font-weight: 600;
}

.tt-empty-card {
  padding: 22px;
  border-radius: 10px;
}

.tt-workspace__backdrop {
  display: none;
}

.tt-simple-copy {
  max-width: 44ch;
}

@media (max-width: 980px) {
  .tt-entry-grid,
  .tt-entry-grid--split {
    grid-template-columns: 1fr;
  }

  .tt-sidebar {
    transform: translateX(-100%);
    transition: transform 160ms ease;
  }

  body.tt-sidebar-open {
    overflow: hidden;
  }

  body.tt-sidebar-open .tt-sidebar {
    transform: translateX(0);
  }

  .tt-workspace__backdrop {
    display: block;
    position: fixed;
    inset: 0;
    border: 0;
    background: rgba(0, 0, 0, 0.45);
    opacity: 0;
    pointer-events: none;
    z-index: 40;
  }

  body.tt-sidebar-open .tt-workspace__backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  .tt-workspace__main {
    margin-left: 0;
    width: 100%;
  }

  .tt-sidebar-toggle {
    display: inline-flex;
  }
}

@media (max-width: 760px) {
  .tt-landing-page {
    width: calc(100vw - 16px);
    padding-bottom: 52px;
  }

  .tt-landing-nav,
  .tt-workspace__topbar,
  .tt-section-head,
  .tt-content-section__head,
  .tt-link-card {
    align-items: flex-start;
    flex-direction: column;
  }

  .tt-link-card__meta {
    min-width: 0;
    width: 100%;
    align-items: flex-start;
  }

  .tt-entry-card,
  .tt-landing-hero {
    padding: 20px;
  }
}


/* ── Account / auth pages ─────────────────────────────────────────────────── */

.auth-hero {
  max-width: 560px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 480px;
}

.auth-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.auth-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--tt-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.auth-input {
  padding: 12px 16px;
  border-radius: var(--tt-radius-md);
  border: 1.5px solid var(--tt-border);
  background: var(--tt-surface);
  color: var(--tt-ink);
  font-family: var(--tt-font-sans);
  font-size: 1rem;
  width: 100%;
}

.auth-input:focus {
  outline: 3px solid var(--tt-accent-strong);
  outline-offset: 2px;
  border-color: transparent;
}

.auth-input::placeholder {
  color: var(--tt-muted);
  opacity: 0.55;
}

.auth-submit {
  align-self: flex-start;
  cursor: pointer;
  border: none;
  font-family: var(--tt-font-sans);
  font-size: 1rem;
}

.auth-note {
  font-size: 0.9rem;
  color: var(--tt-muted);
  margin: 0;
  min-height: 1.4em;
}

.auth-detail-card {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 560px;
  padding: 24px;
  border-radius: var(--tt-radius-md);
  border: 1.5px solid var(--tt-border);
  background: var(--tt-surface);
  box-shadow: var(--tt-shadow);
}

.auth-detail-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding: 0;
}

.auth-detail-row {
  display: flex;
  gap: 12px;
  align-items: baseline;
}

.auth-detail-row dt {
  min-width: 120px;
  flex-shrink: 0;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--tt-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.auth-detail-row dd {
  margin: 0;
  color: var(--tt-ink);
}

/* Sign-out is a <button> but styled like a nav link */
button.utility-link {
  cursor: pointer;
  border: none;
  font-family: var(--tt-font-sans);
  font-size: 1rem;
}