/* Design-site layout. Color/scale tokens come from themes.css (vendored shared package). */

:root {
  --chrome-height: 4.5rem;
  --brand-mark: #14b8a6;
  --tap-min: 2.75rem;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-7: 2rem;
  --space-8: 2.5rem;
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --font-ui: 'Segoe UI', Calibri, 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--chrome-height);
}

html[data-theme='dark'] {
  --brand-mark: #2dd4bf;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(62.5rem 31.25rem at 20% -10%, var(--bg-glow) 0%, transparent 55%), var(--bg);
  font-family: var(--font-ui);
  font-size: 1.125rem;
  line-height: 1.55;
}

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

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

.skip {
  position: absolute;
  left: -999px;
  top: var(--space-2);
}

.skip:focus {
  left: var(--space-3);
  background: var(--panel);
  color: var(--text);
  padding: var(--space-2) var(--space-3);
  z-index: 60;
}

.ui-chrome {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--panel);
  color: var(--text);
  border-bottom: 0.2rem solid var(--accent-2);
}

.ui-chrome-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-4);
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-4);
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
  min-height: var(--tap-min);
  margin: 0;
  padding: 0;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.brand-lockup:hover,
.brand-lockup:focus {
  color: var(--text);
}

.brand-lockup:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.brand-mark {
  display: block;
  width: 1.875rem;
  height: 1.875rem;
  flex: 0 0 auto;
  color: var(--brand-mark, #14b8a6);
}

.brand-wordmark {
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.01em;
  color: var(--text);
  line-height: 1;
}

.brand-tld {
  color: var(--muted);
  font-weight: 500;
  font-size: 1.125rem;
  letter-spacing: 0.01em;
  line-height: 1;
}

.brand-splash {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-3);
}

.brand-splash .brand-mark {
  width: 4.5rem;
  height: 4.5rem;
}

.brand-splash .brand-wordmark {
  margin: 0;
  font-size: 1.75rem;
}

.brand-splash .brand-tagline {
  margin: 0;
  max-width: 22rem;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.35;
}

.gate-card .brand-splash {
  margin-bottom: var(--space-5);
}

.ui-settings {
  position: relative;
  flex: 0 0 auto;
  margin-left: auto;
}

@media (max-width: 22rem) {
  .brand-tld {
    display: none;
  }
}

.ui-settings-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--tap-min);
  height: var(--tap-min);
  min-width: var(--tap-min);
  min-height: var(--tap-min);
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}

.ui-settings-toggle:hover,
.ui-settings-toggle:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.ui-settings-toggle[aria-expanded='true'] {
  background: var(--accent-2);
  color: var(--accent-text);
  border-color: var(--accent-2);
}

.ui-settings-cog {
  display: block;
  width: 1.25rem;
  height: 1.25rem;
  overflow: visible;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ui-settings-panel {
  position: absolute;
  z-index: 52;
  top: calc(100% + var(--space-2));
  right: 0;
  width: min(22rem, calc(100vw - 2rem));
  padding: var(--space-4);
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
}

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

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  align-items: center;
}

.site-nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  min-height: var(--tap-min);
  display: inline-flex;
  align-items: center;
}

.site-nav a:hover,
.site-nav a:focus {
  color: var(--accent-2);
  text-decoration: underline;
}

.site-nav a[aria-current='page'] {
  color: var(--accent-2);
}

.ui-controls {
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: stretch;
}

.ui-settings-panel .ui-seg-label {
  width: 100%;
  margin: 0 0 var(--space-1);
}

.ui-seg {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.ui-seg-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0.95;
  margin-right: var(--space-1);
  align-self: center;
}

.ui-seg button {
  min-height: var(--tap-min);
  min-width: var(--tap-min);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
}

.ui-seg button:hover,
.ui-seg button:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.ui-seg button[aria-pressed='true'] {
  background: var(--accent-2);
  color: var(--accent-text);
  border-color: var(--accent-2);
}

.ui-seg button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.ui-scale-value {
  min-width: 3.5rem;
  text-align: center;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

header.hero {
  background:
    radial-gradient(56rem 20rem at 88% -10%, var(--bg-glow) 0%, transparent 55%),
    linear-gradient(160deg, var(--bg) 0%, var(--panel) 70%, var(--bg) 100%);
  color: var(--text);
  padding: var(--space-7) var(--space-4) var(--space-8);
}

.wrap {
  max-width: 67.5rem;
  margin: 0 auto;
}

.brand-row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  align-items: baseline;
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}

.brand {
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.875rem;
  color: var(--accent-2);
}

.meta-line {
  color: var(--muted);
  font-size: 0.9375rem;
}

header.hero h1 {
  margin: 0 0 var(--space-3);
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
  font-weight: 700;
}

.tagline {
  margin: 0 0 var(--space-5);
  font-size: clamp(1.25rem, 2.4vw, 1.625rem);
  color: var(--muted);
  max-width: 40rem;
}

.hero-points {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 13.75rem), 1fr));
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-points li {
  background: var(--bg-glow);
  border: 1px solid var(--border);
  border-radius: 0.625rem;
  padding: var(--space-3) var(--space-3);
  color: var(--text);
}

nav.toc {
  background: var(--bg);
  color: var(--text);
}

nav.toc .toc-bar {
  position: relative;
  padding: var(--space-2) var(--space-4) var(--space-3);
}

.toc-disclosure {
  position: relative;
}

.toc-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: var(--tap-min);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

.toc-toggle::-webkit-details-marker {
  display: none;
}

.toc-toggle:hover,
.toc-toggle:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.toc-disclosure[open] .toc-toggle {
  background: var(--accent-2);
  color: var(--accent-text);
  border-color: var(--accent-2);
}

.toc-burger {
  display: block;
  width: 1rem;
  height: 0.75rem;
  flex: 0 0 auto;
  background:
    linear-gradient(currentColor, currentColor) 0 0 / 100% 0.125rem no-repeat,
    linear-gradient(currentColor, currentColor) 0 50% / 100% 0.125rem no-repeat,
    linear-gradient(currentColor, currentColor) 0 100% / 100% 0.125rem no-repeat;
}

.toc-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
}

nav.toc a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  min-height: var(--tap-min);
  display: inline-flex;
  align-items: center;
}

nav.toc a:hover,
nav.toc a:focus {
  color: var(--accent-2);
  text-decoration: underline;
}

body.is-gated nav.toc {
  display: none;
}

/* Compact (phone or high text scale): collapsed by default; open as overlay. */
.toc-disclosure[open] .toc-links {
  position: absolute;
  z-index: 51;
  left: 0;
  right: 0;
  top: calc(100% - var(--space-2));
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
  gap: 0;
  max-height: min(70vh, 24rem);
  overflow: auto;
  margin-top: var(--space-1);
  padding: var(--space-2) var(--space-4) var(--space-3);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
}

@media (min-width: 68rem) {
  html[data-scale='100'] .toc-toggle,
  html[data-scale='125'] .toc-toggle {
    display: none;
  }

  html[data-scale='100'] .toc-disclosure .toc-links,
  html[data-scale='125'] .toc-disclosure .toc-links {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    position: static;
    max-height: none;
    overflow: visible;
    margin: 0;
    padding: 0;
    background: transparent;
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }
}

main {
  padding: var(--space-2) var(--space-4) var(--space-8);
}

section {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0.875rem;
  padding: var(--space-6) var(--space-6) var(--space-5);
  margin: var(--space-5) auto;
  max-width: 67.5rem;
  box-shadow: var(--shadow);
}

section h2 {
  margin: 0 0 var(--space-2);
  color: var(--text);
  font-size: 1.75rem;
}

.lede {
  margin: 0 0 var(--space-5);
  color: var(--muted);
  font-size: 1.125rem;
}

h3 {
  margin: var(--space-5) 0 var(--space-2);
  color: var(--muted);
  font-size: 1.25rem;
}

p {
  margin: 0 0 var(--space-3);
}

ul,
ol {
  margin: 0 0 var(--space-3);
  padding-left: 1.25em;
}

li + li {
  margin-top: var(--space-1);
}

.badge {
  display: inline-block;
  background: var(--input-bg);
  color: var(--accent-2);
  border: 1px solid var(--accent-2);
  border-radius: 999px;
  padding: 0.125rem 0.625rem;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.locked {
  background: var(--input-bg);
  border-color: var(--accent-2);
  color: var(--accent-2);
}

.callout {
  background: var(--input-bg);
  border-left: 0.3rem solid var(--muted);
  padding: var(--space-3) var(--space-4);
  margin: var(--space-4) 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.callout.teal {
  background: var(--input-bg);
  border-left-color: var(--accent-2);
}

.callout.gold {
  background: var(--input-bg);
  border-left-color: var(--accent);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16.25rem), 1fr));
  gap: var(--space-4);
}

.card {
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.card h3 {
  margin-top: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 1rem;
  margin: var(--space-2) 0 var(--space-1);
}

th,
td {
  text-align: left;
  vertical-align: top;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--border);
}

th {
  background: var(--bg);
  color: var(--text);
  font-weight: 700;
}

tr:nth-child(even) td {
  background: var(--bg-glow);
}

dt {
  font-weight: 700;
  color: var(--text);
  margin-top: var(--space-3);
}

dd {
  margin: var(--space-1) 0 0;
  color: var(--muted);
}

.dl-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 17.5rem), 1fr));
  gap: var(--space-1) var(--space-5);
}

.journey {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 11.25rem), 1fr));
  gap: var(--space-3);
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 0;
}

.journey li {
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  min-height: 8.75rem;
}

.journey li::before {
  counter-increment: step;
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--tap-min);
  height: var(--tap-min);
  margin-bottom: var(--space-2);
  border-radius: 50%;
  background: var(--accent-2);
  color: var(--accent-text);
  font-weight: 700;
  font-size: 0.875rem;
}

.journey strong {
  display: block;
  color: var(--text);
  margin-bottom: var(--space-1);
}

.takeaways {
  display: grid;
  gap: var(--space-2);
  padding: 0;
  margin: 0;
  list-style: none;
}

.takeaways li {
  background: var(--input-bg);
  border: 1px solid var(--accent-2);
  border-radius: 0.625rem;
  padding: var(--space-3);
}

.diagram {
  width: 100%;
  height: auto;
  display: block;
  margin: var(--space-2) 0 var(--space-1);
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.diagram .box-navy {
  fill: var(--bg);
}

.diagram .box-navy-mid {
  fill: var(--panel);
}

.diagram .box-navy-soft {
  fill: var(--input-bg);
}

.diagram .box-accent {
  fill: var(--accent-2);
}

.diagram .label-accent {
  fill: var(--accent-2);
}

.diagram .label-on-dark {
  fill: var(--text);
}

.diagram .label-muted-on-dark {
  fill: var(--muted);
}

.diagram .label-ink {
  fill: var(--text);
}

.diagram .label-accent-text {
  fill: var(--accent-2);
}

.diagram .label-success {
  fill: var(--accent-2);
}

.diagram .label-warn {
  fill: var(--accent);
}

.diagram .label-warn-fg {
  fill: var(--accent);
}

.diagram .panel-success {
  fill: var(--input-bg);
  stroke: var(--accent-2);
}

.diagram .panel-warn {
  fill: var(--input-bg);
  stroke: var(--accent);
}

.diagram path.arrow,
.diagram path.arrow-warn {
  fill: none;
}

.diagram .arrow {
  stroke: var(--accent-2);
  fill: var(--accent-2);
}

.diagram .arrow-warn {
  stroke: var(--accent);
  fill: var(--accent);
}

.caption {
  color: var(--muted);
  font-size: 0.9375rem;
  margin: var(--space-1) 0 0;
}

footer {
  background: var(--bg);
  color: var(--muted);
  padding: var(--space-6) var(--space-4) var(--space-7);
}

footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  min-width: 0;
}

.footer-brand .brand-mark {
  width: 1.75rem;
  height: 1.75rem;
  margin-top: 0.15rem;
}

footer strong {
  color: var(--text);
}

@media (max-width: 45rem) {
  section {
    padding: var(--space-5) var(--space-4);
  }

  th,
  td {
    font-size: 0.9375rem;
  }
}

body.is-gated {
  background: var(--bg);
}

body.is-gated #brief,
body.is-gated #collaborate-app,
body.is-gated .skip {
  display: none !important;
}

.gate {
  display: none;
  position: fixed;
  inset: 0;
  top: var(--chrome-height);
  z-index: 40;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  background:
    radial-gradient(56rem 20rem at 88% -10%, var(--bg-glow) 0%, transparent 55%),
    linear-gradient(160deg, var(--bg) 0%, var(--panel) 70%, var(--bg) 100%);
  color: var(--text);
}

body.is-gated .gate {
  display: flex;
}

.gate-card {
  width: min(27.5rem, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-7) var(--space-6);
  box-shadow: var(--shadow);
  color: var(--text);
}

.gate-kicker {
  margin: 0 0 var(--space-2);
  color: var(--accent-2);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
}

.gate h1 {
  margin: 0 0 var(--space-3);
  font-size: 2rem;
  line-height: 1.15;
  color: var(--text);
}

.gate p {
  margin: 0 0 var(--space-5);
  color: var(--muted);
}

.gate label {
  display: block;
  margin-bottom: var(--space-1);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text);
}

.gate input[type='password'],
.gate input[type='email'],
.gate input[type='text'] {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--text);
  border-radius: 0.625rem;
  padding: var(--space-3);
  font-size: 1.125rem;
  margin-bottom: var(--space-3);
  min-height: var(--tap-min);
}

.gate input[type='password']:focus,
.gate input[type='email']:focus,
.gate input[type='text']:focus {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.gate-or {
  margin: 0 0 var(--space-3);
  color: var(--muted);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.design-account {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  min-width: 0;
}

.design-account[hidden] {
  display: none;
}

.design-session {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  min-width: 0;
  line-height: 1.25;
}

.design-session[hidden] {
  display: none;
}

.design-session-email {
  font-size: 0.8125rem;
  font-weight: 600;
  max-width: 14rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.design-session-role {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.design-sign-out {
  min-height: var(--tap-min);
  border: 1px solid var(--border);
  border-radius: 0.625rem;
  background: transparent;
  color: var(--text);
  font-size: 0.9375rem;
  font-weight: 700;
  padding: 0.35rem 0.75rem;
  cursor: pointer;
}

.design-sign-out:focus {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

body.is-gated .design-account,
body.is-gated .design-sign-out {
  display: none;
}

.gate-magic {
  margin: 0 0 var(--space-3);
}

.gate-magic summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 600;
}

.gate-magic[open] summary {
  margin-bottom: var(--space-2);
}

.gate button {
  width: 100%;
  min-height: var(--tap-min);
  border: 0;
  border-radius: 0.625rem;
  background: var(--accent-2);
  color: var(--accent-text);
  font-size: 1.0625rem;
  font-weight: 700;
  padding: var(--space-3) var(--space-4);
  cursor: pointer;
}

.gate button:hover,
.gate button:focus {
  background: var(--accent-2);
}

.gate-error {
  margin: var(--space-3) 0 0;
  color: var(--danger);
  font-size: 0.9375rem;
}

.gate-error[hidden] {
  display: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.collab .lede {
  margin-bottom: var(--space-4);
}

.collab-compose,
.collab-toolbar,
.collab-thread,
.collab-empty {
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.collab-compose {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.collab-roster {
  margin: 0;
}

.collab-roster-toggle {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap-min);
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
}

.collab-roster-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-2) 0 0;
  padding: 0;
  list-style: none;
}

.collab-roster-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  min-height: var(--tap-min);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  font-weight: 600;
  color: var(--text);
}

.collab-roster-item.is-you {
  border-color: var(--accent-2);
  color: var(--accent-2);
}

.collab-roster-you {
  font-weight: 500;
  font-size: 0.8125rem;
  color: var(--muted);
}

.collab-roster-empty {
  color: var(--muted);
  list-style: none;
}

.collab-hint {
  margin: var(--space-1) 0 var(--space-2);
  color: var(--muted);
  font-size: 0.9375rem;
}

.collab-choice-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.collab-choice {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: var(--tap-min);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
}

.collab-choice:has(input:focus-visible) {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.collab-choice:has(input:checked) {
  background: var(--input-bg);
  border-color: var(--accent-2);
  color: var(--accent-2);
}

.collab-field {
  display: grid;
  gap: var(--space-1);
}

.collab-field label,
.collab-toolbar label {
  font-weight: 700;
  color: var(--text);
  font-size: 0.9375rem;
}

.collab-file-heading {
  font-weight: 700;
  color: var(--text);
  font-size: 0.9375rem;
}

.collab-file-picker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.collab-file-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--tap-min);
  min-width: 8.5rem;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border);
  border-radius: 0.625rem;
  background: var(--panel);
  color: var(--text);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.collab-file-btn:focus-within {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.collab-file-input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  opacity: 0;
  cursor: pointer;
  font-size: 1rem;
}

.collab-file-name {
  color: var(--muted);
  font-size: 0.9375rem;
  overflow-wrap: anywhere;
}

.collab-file-clear {
  border: 1px solid var(--border);
  border-radius: 0.625rem;
  background: var(--panel);
  color: var(--text);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  min-height: var(--tap-min);
  padding: var(--space-2) var(--space-3);
}

.collab-file-clear:focus,
.collab-url-fallback summary:focus,
.collab-link-card:focus {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.collab-local-preview {
  display: grid;
  gap: var(--space-1);
}

.collab-local-preview[hidden],
.collab-upload-progress[hidden],
.collab-link-preview[hidden],
.collab-file-clear[hidden],
.collab-compose[hidden],
.collab-reply[hidden],
.collab-tags-disclosure[hidden],
.collab-tags-form[hidden],
.collab-thread-actions[hidden],
.collab-delete-confirm[hidden],
#collab-filter-archived-label[hidden],
.messenger-thread-view[hidden],
.messenger-back[hidden] {
  display: none !important;
}

.collab-local-preview img,
.collab-inline-image img,
.collab-link-thumb {
  display: block;
  max-width: min(100%, 18rem);
  max-height: 12rem;
  width: auto;
  height: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--panel);
}

.collab-upload-progress {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.collab-upload-bar {
  flex: 1;
  height: 0.5rem;
  border-radius: 999px;
  background: var(--border);
  overflow: hidden;
}

.collab-upload-bar::after {
  content: '';
  display: block;
  height: 100%;
  width: var(--collab-upload-pct, 0%);
  background: var(--accent-2);
}

.collab-url-fallback {
  margin-top: var(--space-1);
}

.collab-url-fallback summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--accent-2);
  min-height: var(--tap-min);
  display: flex;
  align-items: center;
}

.collab-url-fallback[open] {
  display: grid;
  gap: var(--space-1);
}

.collab-link-preview {
  display: grid;
}

.collab-link-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  align-items: center;
  padding: var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--panel);
  text-decoration: none;
  color: inherit;
}

.collab-link-card.is-simple {
  grid-template-columns: 1fr;
}

.collab-link-card strong {
  display: block;
  color: var(--text);
}

.collab-link-card span {
  display: block;
  color: var(--muted);
  font-size: 0.875rem;
  overflow-wrap: anywhere;
}

.collab-inline-image {
  display: block;
  margin: var(--space-2) 0;
}

.collab-field select,
.collab-field textarea,
.collab-field input[type='url'],
.collab-tags-form input[type='text'],
.collab-reply textarea,
.collab-toolbar select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 0.625rem;
  padding: var(--space-2) var(--space-3);
  font: inherit;
  color: var(--text);
  background: var(--input-bg);
  min-height: var(--tap-min);
}

.collab-field textarea,
.collab-reply textarea {
  resize: vertical;
  min-height: 4.5rem;
}

.collab-field select:focus,
.collab-field textarea:focus,
.collab-field input:focus,
.collab-tags-form input:focus,
.collab-reply textarea:focus,
.collab-toolbar select:focus,
.collab-submit:focus,
.collab-refresh:focus,
.collab-reply-btn:focus,
.collab-answer-btn:focus,
.collab-mod-btn:focus,
.collab-file-clear:focus {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.collab-submit,
.collab-refresh,
.collab-reply-btn,
.collab-answer-btn {
  border: 0;
  border-radius: 0.625rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  padding: var(--space-2) var(--space-3);
  min-height: var(--tap-min);
}

.collab-submit,
.collab-answer-btn.is-emphasized,
.collab-refresh {
  background: var(--accent-2);
  color: var(--accent-text);
}

.collab-submit:hover,
.collab-answer-btn.is-emphasized:hover,
.collab-refresh:hover {
  background: var(--accent-2);
}

.collab-submit:disabled,
.collab-reply-btn:disabled,
.collab-answer-btn:disabled,
.collab-refresh:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.collab-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-4);
  align-items: end;
  margin-bottom: var(--space-3);
}

.collab-toolbar label {
  display: grid;
  gap: var(--space-1);
  min-width: min(9rem, 100%);
  flex: 1;
}

.collab-status {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.4;
}

.collab-status:empty {
  display: none;
}

.collab-status:not(:empty) {
  margin: var(--space-2) 0;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--input-bg);
}

.collab-status.is-error {
  color: var(--danger);
  border-color: var(--danger);
}

.collab-status.is-ok {
  color: var(--accent-2);
  border-color: var(--accent-2);
}

.collab-status.is-loading {
  color: var(--muted);
}

.collab-threads {
  display: grid;
  gap: var(--space-3);
}

.collab-empty {
  margin: 0;
  color: var(--muted);
}

.collab-thread {
  background: var(--panel);
}

.collab-thread-head {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-3);
  align-items: center;
  margin-bottom: var(--space-2);
}

.collab-thread-head strong {
  color: var(--text);
}

.collab-thread-head time,
.collab-bubble-meta time {
  color: var(--muted);
  font-size: 0.875rem;
}

.collab-type-badge {
  display: inline-block;
  border-radius: 999px;
  padding: 0.125rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.collab-type-badge.type-comment {
  background: var(--input-bg);
  color: var(--accent-2);
}

.collab-type-badge.type-question {
  background: var(--input-bg);
  color: var(--accent);
}

.collab-type-badge.type-change_request {
  background: var(--input-bg);
  color: var(--accent);
}

.collab-type-badge.type-document {
  background: var(--input-bg);
  color: var(--accent);
}

.collab-thread-body,
.collab-bubble-body {
  margin: 0 0 var(--space-2);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.collab-attach {
  margin: 0 0 var(--space-2);
  font-size: 0.9375rem;
}

.collab-messages {
  display: grid;
  gap: var(--space-2);
  margin: var(--space-3) 0;
}

.collab-bubble {
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  max-width: 92%;
  background: var(--input-bg);
  border: 1px solid var(--border);
}

.collab-bubble.is-mine {
  margin-left: auto;
  background: var(--input-bg);
  border-color: var(--accent-2);
}

.collab-bubble.kind-answer {
  background: var(--input-bg);
  border-color: var(--accent-2);
}

.collab-bubble.kind-answer.is-mine {
  background: var(--input-bg);
}

.collab-bubble-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  margin-bottom: var(--space-1);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text);
}

.collab-kind-label {
  border-radius: 999px;
  padding: 0.0625rem 0.5rem;
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--bg-glow);
  color: var(--muted);
}

.kind-answer .collab-kind-label {
  background: var(--accent-2);
  color: var(--accent-2);
}

.collab-reply {
  display: grid;
  gap: var(--space-2);
}

.collab-reply-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.collab-reply-btn,
.collab-answer-btn {
  background: var(--bg);
  color: var(--text);
}

.collab-reply-btn:hover,
.collab-answer-btn:hover {
  background: var(--muted);
}

.collab-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--tap-min);
  padding: var(--space-2) var(--space-4);
  border-radius: 0.625rem;
  background: var(--accent-2);
  color: var(--accent-text);
  font-weight: 700;
  text-decoration: none;
}

.collab-cta-btn:hover,
.collab-cta-btn:focus {
  color: var(--accent-text);
  text-decoration: underline;
}

.collab-bubble.is-trace {
  border-color: var(--accent);
}

.messenger-trace-chip {
  display: inline-flex;
  align-items: center;
  margin-left: var(--space-2);
  border-radius: 999px;
  padding: 0.0625rem 0.5rem;
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--input-bg);
  color: var(--accent);
  border: 1px solid var(--accent);
}

.collab-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  align-items: center;
}

.collab-tag-chip {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.0625rem 0.5rem;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  border: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--text);
}

.collab-tag-chip.is-auto {
  border-style: dashed;
  color: var(--muted);
}

.collab-tag-chip.is-user {
  border-color: var(--accent-2);
  color: var(--accent-2);
}

.collab-archived-badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.0625rem 0.5rem;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid var(--danger);
  color: var(--danger);
  background: var(--input-bg);
}

.collab-thread-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-left: auto;
}

.collab-mod-btn {
  border: 1px solid var(--border);
  border-radius: 0.625rem;
  background: var(--input-bg);
  color: var(--text);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  padding: var(--space-2) var(--space-3);
  min-height: var(--tap-min);
}

.collab-mod-btn:hover {
  background: var(--bg-glow);
}

.collab-mod-btn.is-danger {
  border-color: var(--danger);
  color: var(--danger);
}

.collab-mod-btn.is-danger:hover {
  background: var(--input-bg);
}

.collab-mod-btn:disabled,
.collab-tags-form button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.collab-delete-confirm {
  margin: 0 var(--space-4);
  padding: var(--space-3);
  border: 1px solid var(--danger);
  border-radius: var(--radius-md);
  background: var(--input-bg);
}

.collab-delete-confirm p {
  margin: 0 0 var(--space-2);
  color: var(--text);
  font-weight: 700;
}

.collab-tags-disclosure {
  margin: 0 var(--space-4) var(--space-4);
  padding: var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--input-bg);
}

.collab-tags-disclosure > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  min-height: var(--tap-min);
  list-style: none;
  color: var(--text);
}

.collab-tags-disclosure > summary:focus {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.collab-tags-disclosure > summary::-webkit-details-marker {
  display: none;
}

.collab-tags-toggle-label {
  font-weight: 700;
  color: var(--accent-2);
}

.collab-tags-toggle-label::before {
  content: '▸ ';
  display: inline-block;
  width: 1em;
}

.collab-tags-disclosure[open] > summary .collab-tags-toggle-label::before {
  content: '▾ ';
}

.collab-tags-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  min-width: 0;
  flex: 1 1 10rem;
}

.collab-tags-summary-empty {
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 500;
}

.collab-tags-disclosure[open] > summary {
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border);
}

.collab-tags-form {
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
}

.collab-tags-form fieldset {
  border: 0;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.collab-tags-form legend {
  font-weight: 700;
  color: var(--text);
  padding: 0;
}

.messenger-item-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  min-width: 0;
  pointer-events: none;
}

.messenger-item.is-archived {
  border-style: dashed;
}

body.collaborate-page {
  min-height: 100dvh;
}

body.collaborate-page:not(.is-gated) {
  overflow: hidden;
}

#collaborate-app {
  height: calc(100dvh - var(--chrome-height));
}

.messenger {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-width: 90rem;
  margin: 0 auto;
  padding: var(--space-3) var(--space-4) var(--space-4);
  gap: var(--space-3);
}

.messenger-identity {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  box-shadow: var(--shadow);
}

.messenger-identity .collab-hint {
  margin-bottom: var(--space-2);
}

.messenger-panes {
  display: grid;
  grid-template-columns: minmax(16rem, 22rem) minmax(0, 1fr);
  gap: var(--space-3);
  min-height: 0;
  flex: 1 1 auto;
}

.messenger-list,
.messenger-thread {
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
}

.messenger-list-head,
.messenger-thread-head {
  flex-shrink: 0;
  padding: var(--space-3) var(--space-4) var(--space-2);
  border-bottom: 1px solid var(--border);
}

.messenger-list-title-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.messenger-list-title-row h1,
.messenger-thread-head h2 {
  margin: 0;
  font-size: 1.25rem;
}

.messenger-search-label {
  display: grid;
  gap: var(--space-1);
  font-weight: 700;
  color: var(--text);
  font-size: 0.9375rem;
  margin-bottom: var(--space-3);
}

.messenger-search-label input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 0.625rem;
  padding: var(--space-2) var(--space-3);
  font: inherit;
  color: var(--text);
  background: var(--input-bg);
  min-height: var(--tap-min);
}

.messenger-search-label input:focus,
.messenger-item:focus,
.messenger-item:focus-visible,
.messenger-back:focus {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.messenger .collab-toolbar {
  background: transparent;
  border: 0;
  padding: 0;
  margin-bottom: var(--space-2);
}

.messenger-thread-list {
  overflow: auto;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  flex: 1 1 auto;
  min-height: 0;
}

/* Div (not <button>): UA button height ignores stacked descendants and
   paints chips/timestamps into the next row. */
.messenger-item {
  display: block;
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: auto;
  max-height: none;
  min-height: min-content;
  flex: 0 0 auto;
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 0.625rem;
  padding: var(--space-3);
  font: inherit;
  line-height: 1.4;
  white-space: normal;
  color: var(--text);
  background: var(--input-bg);
  text-align: left;
  cursor: pointer;
  overflow: visible;
  box-sizing: border-box;
}

.messenger-item-stack {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--space-2);
  min-width: 0;
  width: 100%;
}

.messenger-item:hover,
.messenger-item.is-selected {
  border-color: var(--accent-2);
  background: var(--bg-glow);
}

.messenger-item.is-selected {
  box-shadow: inset 0 0 0 1px var(--accent-2);
}

.messenger-item-top,
.messenger-item-people,
.messenger-item-count {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  min-width: 0;
}

.messenger-item-people {
  font-weight: 700;
  justify-content: flex-start;
}

.messenger-item-preview,
.messenger-item-count,
.messenger-item-top time {
  color: var(--muted);
  font-size: 0.875rem;
}

.messenger-item-top time {
  flex: 0 0 auto;
  margin-left: auto;
}

.messenger-item-preview {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.messenger-item .collab-type-badge,
.messenger-item .messenger-trace-chip,
.messenger-item .collab-archived-badge,
.messenger-item .collab-tag-chip {
  flex: 0 0 auto;
  line-height: 1.3;
}

.messenger-thread-head {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}

.messenger-back {
  display: none;
  align-items: center;
  justify-content: center;
  min-height: var(--tap-min);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border);
  border-radius: 0.625rem;
  background: var(--input-bg);
  color: var(--text);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.messenger-thread-view {
  overflow: auto;
  flex: 1 1 auto;
  padding: var(--space-3) var(--space-4);
}

.messenger-thread .collab-compose,
.messenger-thread .collab-reply {
  margin: 0 var(--space-4) var(--space-4);
}

.messenger-thread .collab-thread {
  border: 0;
  background: transparent;
  padding: 0;
}

@media (max-width: 52rem) {
  body.collaborate-page:not(.is-gated) {
    overflow: auto;
  }

  #collaborate-app {
    height: auto;
    min-height: calc(100dvh - var(--chrome-height));
  }

  .messenger-panes {
    grid-template-columns: 1fr;
  }

  .messenger.is-list .messenger-thread,
  .messenger.is-thread .messenger-list {
    display: none;
  }

  .messenger-back {
    display: inline-flex;
  }

  .messenger-list,
  .messenger-thread {
    min-height: calc(100dvh - var(--chrome-height) - 8rem);
  }
}

@media print {
  .ui-chrome,
  #collaboration {
    display: none !important;
  }

  body {
    background: var(--bg);
    font-size: 12pt;
    color: var(--text);
  }

  header.hero {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
    padding: 18pt 12pt;
  }

  section {
    box-shadow: none;
    break-inside: avoid;
    page-break-inside: avoid;
    margin: 14pt 0;
  }

  a {
    color: inherit;
    text-decoration: none;
  }

  .diagram {
    break-inside: avoid;
  }

  footer {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  body.is-gated #brief,
  body.is-gated #collaborate-app,
  body.is-gated .skip {
    display: none !important;
  }
}