:root {
  font-family: system-ui;
  color: #202124;
  background: #fff;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  display: flex;
  height: 100dvh;
}
aside {
  width: 260px;
  background: #f7f7f7;
  padding: 18px;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
a {
  color: inherit;
  text-decoration: none;
}
button,
input,
textarea {
  font: inherit;
}
button {
  border: 1px solid #ddd;
  border-radius: 9px;
  background: white;
  padding: 8px 12px;
  cursor: pointer;
}
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
input,
textarea {
  border: 1px solid #ddd;
  border-radius: 9px;
  padding: 8px;
  min-width: 0;
}
#project-form {
  display: flex;
  gap: 4px;
}
#project-name {
  width: 100%;
}
nav button {
  display: block;
  width: 100%;
  text-align: left;
  margin: 4px 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
nav details {
  margin: 8px 0;
}
details label {
  display: block;
  margin: 10px 0;
}
main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 20px;
}
#messages {
  flex: 1;
  overflow: auto;
  width: 100%;
  max-width: 850px;
  margin: auto;
}
.message {
  margin: 18px 0;
  padding: 14px;
  border-radius: 15px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.user {
  background: #f3f3f3;
  margin-left: 15%;
}
.assistant {
  line-height: 1.6;
}
.message h3 {
  font-size: 14px;
  margin: 0 0 8px;
}
.message pre {
  overflow: auto;
  background: #f7f7f7;
  padding: 12px;
}
.message details {
  font-size: 13px;
  color: #666;
}
#composer {
  display: flex;
  gap: 8px;
  width: 100%;
  max-width: 850px;
  margin: auto;
}
textarea {
  flex: 1;
  resize: vertical;
}
#status,
.note {
  text-align: center;
  color: #666;
  font-size: 13px;
}
#providers label {
  display: block;
}
@media (max-width: 650px) {
  aside {
    width: 155px;
    padding: 8px;
  }
  main {
    padding: 10px;
  }
}
dialog {
  border: 1px solid #ddd;
  border-radius: 14px;
  max-width: 650px;
  width: 90vw;
  max-height: 85vh;
}
dialog::backdrop {
  background: #0006;
}
dialog label {
  display: block;
  margin: 8px 0;
}
dialog textarea {
  width: 100%;
}
#memory-list article {
  padding: 10px;
  border-bottom: 1px solid #ddd;
}
#memory-list p {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* Shared conversation-first presentation with the desktop workspace. */
[hidden] { display: none !important; }
aside { flex-shrink: 0; width: 260px; padding: 18px 12px; gap: 10px; background: #f7f7f7; }
#account-link { padding: 8px 12px; font-size: 23px; font-weight: 650; }
#new-chat, #new-project > summary { border: 0; background: transparent; text-align: left; padding: 10px 12px; font-size: 14px; cursor: pointer; list-style: none; }
#new-project > summary::-webkit-details-marker { display: none; }
#new-project { margin: 0; }
#project-form { padding: 8px; }
#chat-search { width: 100%; font-size: 13px; background: transparent; }
nav button { border: 0; background: transparent; font-size: 13px; font-weight: 400; padding: 8px 12px; }
nav button:hover, nav button[aria-current=true], #new-chat:hover, #new-project > summary:hover { background: #e9e9e9; }
nav summary { padding: 8px 12px; font-size: 13px; cursor: pointer; }
nav .project-action { display: inline-block; width: auto; font-size: 11px; padding: 5px 9px; }
.library-heading { color: #737373; font-size: 12px; margin: 20px 12px 6px; }
aside > details:not(#new-project) { margin-top: auto; border-top: 1px solid #e3e3e3; padding-top: 14px; }
aside > details > summary { cursor: pointer; font-size: 13px; padding: 8px 12px; }
main { padding: 0 28px 12px; }
#chat-header { display: flex; align-items: center; gap: 12px; min-height: 64px; border-bottom: 1px solid #f0f0f0; }
#chat-title { font-size: 16px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.environment { margin-left: auto; font-size: 11px; color: #737373; }
#chat-options, #sidebar-toggle { border: 0; background: transparent; font-size: 20px; padding: 6px 10px; }
#sidebar-toggle { display: none; }
#messages { max-width: 800px; }
.message { border: 0; margin: 24px 0; padding: 12px 16px; }
.message.user { width: fit-content; max-width: 85%; margin-left: auto; border-radius: 20px; }
.message h3 { font-size: 12px; color: #737373; font-weight: 500; }
.assistant { padding-left: 0; }
#composer { max-width: 800px; flex-wrap: wrap; align-items: center; border: 1px solid #e3e3e3; border-radius: 22px; background: #f8f8f8; padding: 10px 14px; }
#question { flex-basis: 100%; order: 0; width: 100%; border: 0; background: transparent; min-height: 54px; resize: none; outline-offset: 0; }
.compare-chip { order: 1; font-size: 12px; display: flex; align-items: center; gap: 4px; cursor: pointer; }
#send { order: 2; margin-left: auto; background: #292929; color: white; padding: 7px 14px; border-radius: 18px; }
#preview-note { font-size: 10px; margin: 8px 0 0; }
#status { min-height: 18px; margin: 6px 0; }
button:focus-visible, input:focus-visible, textarea:focus-visible, summary:focus-visible { outline: 2px solid #777; outline-offset: 3px; }
@media (max-width: 760px) {
  aside { display: none; position: fixed; inset: 0 auto 0 0; z-index: 10; height: 100dvh; box-shadow: 8px 0 24px #0002; }
  .sidebar-open aside { display: flex; }
  #sidebar-toggle { display: inline-block; }
  main { padding: 0 14px 12px; }
  .sidebar-open #sidebar-toggle { position: fixed; left: 266px; z-index: 11; background: white; border-radius: 8px; }
}

/* Familiar account menu and category-based Settings dialog. */
#sidebar { flex: 1; min-height: 80px; overflow-y: auto; }
#sidebar-footer { margin-top: auto; border-top: 1px solid #e3e3e3; padding-top: 8px; }
#settings-open { width: 100%; border: 0; background: transparent; text-align: left; font-size: 13px; padding: 10px 12px; }
#account-menu { position: relative; }
#account-menu > summary { display: flex; align-items: center; gap: 9px; padding: 8px 10px; list-style: none; cursor: pointer; border-radius: 9px; }
#account-menu > summary::-webkit-details-marker { display: none; }
#profile-avatar { display: grid; place-items: center; flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%; background: #dedede; font-size: 13px; }
#profile-label { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 12px; }
#account-menu a, #account-menu button { display: block; padding: 9px 12px; font-size: 13px; border: 0; background: transparent; width: 100%; text-align: left; }
#account-menu a:hover, #account-menu button:hover, #settings-open:hover { background: #e9e9e9; border-radius: 8px; }
#settings-dialog { max-width: 800px; width: min(800px, 94vw); padding: 0; }
.dialog-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 24px; border-bottom: 1px solid #e3e3e3; }
.dialog-header h2 { font-size: 20px; margin: 0; }
#settings-close { font-size: 24px; border: 0; background: transparent; padding: 4px 8px; }
.settings-layout { display: grid; grid-template-columns: 180px minmax(0, 1fr); min-height: 340px; }
.settings-tabs { display: flex; flex-direction: column; gap: 4px; background: #fafafa; padding: 16px 12px; }
.settings-tabs button { border: 0; background: transparent; text-align: left; font-size: 14px; }
.settings-tabs button[aria-selected=true] { background: #e9e9e9; font-weight: 550; }
.settings-content { padding: 20px 24px; overflow: auto; max-height: 65vh; }
.settings-content h3 { font-size: 17px; margin: 0 0 20px; }
.settings-content label { font-size: 14px; }
.settings-content fieldset { border: 0; margin: 0 0 16px; padding: 0; display: flex; flex-wrap: wrap; gap: 10px 18px; }
.settings-content legend { font-size: 14px; font-weight: 550; padding: 0; margin-bottom: 10px; }
.settings-content fieldset label { display: inline-flex; align-items: center; gap: 6px; margin: 0; }
.settings-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 0; border-bottom: 1px solid #eee; font-size: 14px; }
.settings-link { display: block; padding: 14px 0; text-decoration: underline; font-size: 14px; }
.settings-help { font-size: 12px; color: #737373; line-height: 1.6; }
#providers > div { padding: 10px 0; border-bottom: 1px solid #eee; font-size: 14px; }
#providers > div > label { margin: 6px 0 6px 20px; font-size: 12px; }
#model-picker { order: 1; border: 0; padding: 6px 8px; background: transparent; font-size: 12px; max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#empty-heading { display: none; font-size: 28px; font-weight: 500; text-align: center; margin: 0; }
main:has(#messages:empty) #empty-heading { display: block; margin-top: auto; padding: 0 12px 22px; }
main:has(#messages:empty) #messages { flex: 0; margin: 0; }
main:has(#messages:empty) #composer { margin: 0 auto auto; }
main:has(#messages:empty) #status { margin: 0; min-height: 0; }
@media (max-width: 540px) {
  .settings-layout { grid-template-columns: 1fr; }
  .settings-tabs { flex-direction: row; flex-wrap: wrap; padding: 10px; }
  .settings-tabs button { font-size: 12px; padding: 7px 9px; }
  .settings-content { padding: 18px; max-height: 60vh; }
  #empty-heading { font-size: 24px; }
}
.settings-dialog-footer { display: flex; align-items: center; justify-content: space-between; gap: 12px; border-top: 1px solid #e3e3e3; padding: 14px 24px; }
#settings-session { font-size: 11px; color: #737373; line-height: 1.5; }
#settings-done { background: #292929; color: white; padding: 7px 16px; border-radius: 18px; }
#settings-done:disabled { cursor: not-allowed; }
#compare-availability:not(:empty) { background: #f7f7f7; border-radius: 8px; padding: 10px; color: #505050; }

#task-models { order: 3; flex-basis: 100%; font-size: 12px; }
#task-models > summary { cursor: pointer; padding: 5px 0; }
#providers { display: flex; gap: 12px; flex-wrap: wrap; padding: 8px 0; }
#providers > div { flex: 1 1 150px; border: 1px solid #ddd; border-radius: 12px; padding: 10px; }
#providers label { font-size: 12px; margin: 6px 0; }
#synthesis-providers { border: 0; padding: 6px 0; margin: 0; display: flex; gap: 12px; flex-wrap: wrap; }
#synthesis-providers label { display: inline-flex; align-items: center; gap: 4px; margin: 0; }
#combine-controls { border-top: 1px solid #ddd; padding-top: 8px; }
.answer-details { margin: 12px 0; padding: 10px 14px; border: 1px solid #eee; border-radius: 12px; font-size: 13px; }
.answer-details summary { cursor: pointer; font-weight: 500; }
.answer-details pre { overflow: auto; white-space: pre; background: #f7f7f7; padding: 10px; }
.answer-details .markdown { line-height: 1.6; overflow-wrap: anywhere; }

#context-preview { order: 1; border: 0; font-size: 12px; padding: 6px 8px; background: transparent; }
#context-list { overflow-wrap: anywhere; white-space: pre-wrap; line-height: 1.6; }
#context-list details { padding: 10px 0; border-bottom: 1px solid #eee; }
#context-list summary { cursor: pointer; }
.feedback-controls { display: flex; gap: 6px; align-items: center; font-size: 12px; color: #737373; margin: 0 0 16px; }
.feedback-controls button { border: 0; font-size: 11px; background: #f7f7f7; padding: 5px 8px; }

#providers .provider-choice { display: flex; align-items: center; gap: 8px; padding: 8px; margin: 0; font-size: 14px; cursor: pointer; border-radius: 8px; }
#providers .provider-choice:hover { background: #f3f3f3; }
#providers .provider-choice:has(input:checked) { background: #eef3ef; font-weight: 550; }
#providers > div > details { padding: 8px; }
#providers > div > details > summary { cursor: pointer; color: #666; }
#providers > div > details label { display: flex; align-items: center; gap: 6px; padding: 6px 0; overflow-wrap: anywhere; }

.settings-card { border: 1px solid #e5e5e5; border-radius: 12px; padding: 16px; margin-bottom: 16px; }
.settings-card h4 { font-size: 14px; margin: 0 0 10px; }
.settings-card > summary { cursor: pointer; font-size: 14px; font-weight: 550; }
.settings-card details > summary { cursor: pointer; margin-top: 12px; font-size: 13px; }
.settings-card details > button { margin-top: 12px; }

#notes-search-form { display: flex; gap: .5rem; margin-top: 1rem; }
#notes-query { flex: 1; min-width: 0; }
#notes-results pre { white-space: pre-wrap; overflow-wrap: anywhere; }
#notes-results details { margin-top: .75rem; }

/* Comparison follows the Mac: compact choices inline, details on demand. */
#task-models.inline-comparison { padding: 0; }
#task-models.inline-comparison #providers { gap: 6px 14px; padding: 2px 0; }
#task-models.inline-comparison #providers > div { flex: 0 0 auto; border: 0; border-radius: 0; padding: 0; }
#task-models.inline-comparison #providers > div > label { margin: 0; font-size: 12px; }
#task-models.inline-comparison #combine-controls { display: flex; gap: 8px 16px; align-items: baseline; flex-wrap: wrap; }
#task-models.inline-comparison #combine-controls > label { margin: 0; font-size: 12px; }
#comparison-details > summary { cursor: pointer; color: #737373; }
#comparison-details[open] { flex-basis: 100%; }
#comparison-details fieldset { margin-top: 8px; }

.unavailable-feature { color: #888; cursor: not-allowed; font-size: 12px; }
#folder-control { order: 1; }
#folder { border: 0; padding: 6px 8px; background: transparent; font-size: 12px; cursor: not-allowed; }
#folder:disabled { color: #888; opacity: 1; }
#local-compare-control { display: inline-flex; align-items: center; gap: 6px; margin: 0 0 6px; }
.unavailable-feature:focus-visible { outline: 2px solid #777; outline-offset: 3px; border-radius: 4px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

.quick-help { position: relative; }
.quick-help::after {
  opacity: 0; visibility: hidden; transition: opacity .12s, visibility 0s;
  content: attr(aria-description); position: absolute; left: 0; bottom: calc(100% + 8px);
  z-index: 20; width: max-content; max-width: min(280px, 75vw); padding: 9px 12px;
  background: #292929; color: white; border-radius: 8px; font-size: 12px; font-weight: 400;
  line-height: 1.5; white-space: normal; pointer-events: none; box-shadow: 0 3px 12px #0002;
}

.quick-help:hover::after, .quick-help:focus-within::after { opacity: 1; visibility: visible; transition-delay: .7s; }

body:has(.quick-help:hover) .quick-help:not(:hover)::after { display: none; }

#task-models.model-checklist { padding: 0; }
#task-models.model-checklist #providers { gap: 6px 14px; padding: 2px 0; }
#task-models.model-checklist #providers > div { flex: 0 0 auto; border: 0; padding: 0; }
#task-models.model-checklist #providers > div > label { margin: 0; font-size: 12px; }
#combine-controls { order: 1; border: 0; padding: 0; }
#combine-controls > label { margin: 0; font-size: 12px; }
#model-variants > details { margin: 8px 0; }
#model-variants label { display: block; font-size: 12px; margin: 8px 0; }

/* Render prose as Markdown, with patch syntax confined to technical details. */
.markdown { white-space: normal; }
.markdown p { margin: .65em 0; }
.markdown h1, .markdown h2, .markdown h3 { margin: 1em 0 .5em; }
.markdown h1 { font-size: 1.45em; }
.markdown h2 { font-size: 1.25em; }
.markdown h3 { font-size: 1.1em; }
.markdown li { margin: .3em 0; }
.markdown pre { white-space: pre; }
.difference-pair { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 16px; margin: 12px 0; }
.difference-pair section { min-width: 0; padding: 12px; border: 1px solid #eee; border-radius: 8px; }
.difference-pair h4 { margin: 0 0 8px; color: #666; }
@media (max-width: 640px) { .difference-pair { grid-template-columns: 1fr; } }

.answer-actions { display: flex; gap: 12px; align-items: flex-start; flex-wrap: wrap; margin: 12px 0; }
.answer-actions > details { font-size: 13px; color: #666; max-width: 600px; }
.feedback-controls { display: flex; align-items: flex-start; gap: 6px; margin: 8px 0 16px; font-size: 12px; color: #666; }
.feedback-controls > button { padding: 4px 7px; border-color: transparent; background: transparent; }
.feedback-controls button[aria-pressed="true"] { background: #eee; color: #111; }
.feedback-controls summary { cursor: pointer; padding: 5px; }
.feedback-controls textarea { display: block; width: min(420px, 65vw); margin: 8px 0; }
.feedback-stars { display: flex; gap: 2px; }
.feedback-stars button { border: 0; padding: 4px; font-size: 20px; }
.feedback-controls details > button { padding: 5px 8px; margin-right: 4px; }

/* Small choices stay visible; disclosures are reserved for substantial content. */
#model-variants fieldset { border: 0; padding: 6px 0; margin: 0; }
#model-variants legend { color: #737373; font-size: 11px; }
#model-variants label { display: inline-flex; align-items: center; gap: 4px; margin: 4px 10px 4px 0; }
.feedback-controls { flex-wrap: wrap; align-items: center; gap: 4px; }
.feedback-stars button { font-size: 17px; padding: 3px; background: transparent; }
.feedback-comment { display: flex; align-items: center; gap: 4px; flex: 1 1 240px; max-width: 400px; }
.feedback-controls .feedback-comment textarea { width: 100%; min-width: 0; resize: vertical; margin: 0; padding: 6px 8px; font-size: 12px; border-radius: 8px; }
.feedback-controls .feedback-comment button { background: transparent; }

#model-picker { color: #171717; }
#model-picker .model-triangle { content: ""; display: inline-block; margin-left: 6px; vertical-align: middle; border-left: 3px solid transparent; border-right: 3px solid transparent; border-top: 4px solid #171717; }
#model-picker[aria-expanded="true"] .model-triangle { transform: rotate(180deg); }

.markdown a[href^="#answer-"] { font-size: 11px; color: #444; background: #f4f4f4; padding: 2px 5px; border-radius: 5px; text-decoration: underline; text-underline-offset: 2px; }

#task-models #combine-controls { margin: 6px 0; }
.answer-details .answer-actions { margin-bottom: 0; }

/* Originals are small inline disclosures, expanding only when requested. */
.answer-details.original-answer:not([open]) { display: inline-block; vertical-align: top; max-width: 100%; margin: 2px 14px 4px 0; padding: 3px 0; border: 0; border-radius: 0; font-size: 12px; line-height: 1.4; }
.answer-details.original-answer:not([open]) > summary { font-weight: 400; color: #666; }
.answer-details.original-answer[open] { display: block; margin: 6px 0 10px; padding: 8px 0; border: 0; border-top: 1px solid #eee; border-radius: 0; }
.answer-details.original-answer > summary:focus-visible { outline: 2px solid #777; outline-offset: 3px; border-radius: 3px; }

#activity-dialog { width: min(620px, 90vw); }
#activity-content section { border-top: 1px solid #eee; padding: 12px 0; }
#activity-content h3 { margin: 0 0 6px; font-size: 14px; }
#activity-content p { margin: 6px 0; overflow-wrap: anywhere; }

.context-actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
#activity-open { border: 0; background: transparent; text-align: left; font-size: 13px; padding: 9px 12px; }

#settings-default-models { width: 100%; }
#settings-default-models > div { display: flex; flex-wrap: wrap; gap: 8px 14px; margin-bottom: 12px; align-items: center; }

.default-model-options { display: flex; flex-wrap: wrap; gap: 8px 14px; }

#account-limits-form { display: grid; gap: 10px; padding-top: 14px; }
#account-limits-form input { width: 100%; padding: 10px 12px; border: 1px solid #d9dde2; border-radius: 8px; font: inherit; }
#account-limits-save { justify-self: start; }

/* Numbered pairing follows the user's actual computer/browser handoff. */
#local-setup-dialog { width: min(620px, 92vw); max-height: 85vh; overflow-y: auto; }
.pairing-steps { padding-left: 24px; margin: 18px 0; }
.pairing-steps li { padding-left: 6px; margin-bottom: 18px; }
.pairing-steps li::marker { font-weight: 600; }
.pairing-steps p, .companion-startup p { margin: 6px 0 10px; line-height: 1.5; }
.companion-command { display: block; padding: 10px; background: #f6f6f6; border-radius: 8px; white-space: pre-wrap; overflow-wrap: anywhere; font-size: 12px; }
#companion-code { width: 100%; box-sizing: border-box; margin-top: 10px; }
#companion-devices > div { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 8px 0; }
.companion-startup { border-top: 1px solid #e5e5e5; padding-top: 12px; }
#companion-scope-help, #companion-platform-help { color: #666; font-size: 12px; }

/* Settings ownership: defaults, money, identity and device setup are distinct. */
#settings-default-models > div { display: block; padding: 10px 0; border-bottom: 1px solid #eee; margin: 0; }
#settings-default-models > div > label { display: inline-flex; align-items: center; gap: 8px; }
.default-model-options { margin: 8px 0 0 28px; gap: 10px 18px; }
.default-model-options label { display: inline-flex; align-items: center; gap: 6px; }
#account-topups { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0; }
#account-topups button:disabled { opacity: .45; cursor: not-allowed; }
#account-balance { font-size: 24px; }
#settings-dialog > #account-status { margin: 0; padding: 0 24px; }

#subscription-controls { border-top: 1px solid var(--border, #e5e5e5); margin-top: 16px; padding-top: 12px; }
#subscription-controls button { margin: 4px 6px 8px 0; }
#subscription-overage-row { display: block; margin-top: 8px; }

#help-dialog { width: min(620px, 92vw); max-height: 85vh; overflow-y: auto; }
#help-dialog h3 { margin-bottom: 6px; }
#help-dialog p { line-height: 1.55; }

/* First-use consent belongs to the pending message, not model settings. */
#model-consent { order: -1; flex-basis: 100%; padding: 12px; border: 1px solid #dedede; border-radius: 12px; background: #f8f9fb; font-size: 12px; }
#model-consent p { margin: 0 0 8px; font-weight: 600; }
#model-consent label { display: flex; gap: 8px; align-items: flex-start; line-height: 1.5; }
#model-consent input { flex: 0 0 auto; margin-top: 3px; }