/* SRE chat, IBM Carbon Design System. Tokens come from carbon.css (loaded first); nothing here is a raw
   colour except the UI Shell header, which Carbon keeps Gray 100 in every theme. Theme: White, the same
   as the demo console and the control plane; <html data-carbon-theme="g100"> when the system is dark
   (index.html sets it). Rules followed: one theme per view, Blue 60 once (the primary action), sharp
   corners (radius only on tags and the AI label), 4px grid through the spacing tokens, borders not
   shadows, IBM Plex Sans for UI and Plex Mono for data, Carbon icons only. */

/* ---- theme-scoped component tokens carbon.css does not carry (Carbon tag + notification colours) ---- */
:root, [data-carbon-theme="white"], [data-carbon-theme="g10"] {
  --tag-green-bg: var(--cds-green-20);  --tag-green-fg: var(--cds-green-70);
  --tag-red-bg:   var(--cds-red-20);    --tag-red-fg:   var(--cds-red-70);
  --tag-blue-bg:  var(--cds-blue-20);   --tag-blue-fg:  var(--cds-blue-70);
  --tag-gray-bg:  var(--cds-gray-20);   --tag-gray-fg:  var(--cds-gray-80);
  --tag-warm-bg:  var(--cds-yellow-10); --tag-warm-fg:  var(--cds-yellow-70);
  --notification-info-bg:  var(--cds-blue-10);
  --notification-error-bg: var(--cds-red-10);
  --ai-border: var(--cds-blue-60);
}
[data-carbon-theme="g90"], [data-carbon-theme="g100"] {
  --tag-green-bg: var(--cds-green-80);  --tag-green-fg: var(--cds-green-30);
  --tag-red-bg:   var(--cds-red-80);    --tag-red-fg:   var(--cds-red-40);
  --tag-blue-bg:  var(--cds-blue-70);   --tag-blue-fg:  var(--cds-blue-20);
  --tag-gray-bg:  var(--cds-gray-70);   --tag-gray-fg:  var(--cds-gray-10);
  --tag-warm-bg:  var(--cds-yellow-80); --tag-warm-fg:  var(--cds-yellow-20);
  --notification-info-bg:  var(--cds-gray-90);
  --notification-error-bg: var(--cds-gray-90);
  --ai-border: var(--cds-blue-40);
  --cds-background-hover: rgba(141,141,141,0.16);
  --cds-layer-hover-01: #333333;
  --cds-layer-accent-01: #393939;
  --cds-border-strong-01: #8d8d8d;
  --cds-text-on-color: #ffffff;
  /* Carbon g100 status colours (carbon.css keeps the light values) */
  --cds-text-error: var(--cds-red-40);
  --cds-support-error: var(--cds-red-50);
  --cds-support-success: var(--cds-green-40);
  --cds-support-info: var(--cds-blue-50);
}

/* ---- base ---- */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
[hidden] { display: none !important; }
body {
  margin: 0; display: flex; flex-direction: column;
  font-size: var(--cds-body-01-size); line-height: var(--cds-body-01-lh); letter-spacing: 0.16px;
}
h1, h2, p { margin: 0; }
button { font: inherit; }

/* productive type styles used in the markup */
.cds-label       { font-size: var(--cds-label-01-size); line-height: var(--cds-label-01-lh); letter-spacing: 0.32px; color: var(--cds-text-secondary); margin: 0 0 var(--cds-spacing-03); }
.cds-body-01     { font-size: var(--cds-body-01-size); line-height: var(--cds-body-01-lh); letter-spacing: 0.16px; }
.cds-body-02     { font-size: var(--cds-body-02-size); line-height: var(--cds-body-02-lh); letter-spacing: 0; }
.cds-heading-02  { font-size: var(--cds-heading-02-size); line-height: var(--cds-heading-02-lh); font-weight: 600; letter-spacing: 0; }
.cds-heading-04  { font-size: var(--cds-heading-04-size); line-height: var(--cds-heading-04-lh); font-weight: 400; letter-spacing: 0; margin-bottom: var(--cds-spacing-05); }
.text-secondary  { color: var(--cds-text-secondary); }
.mono            { font-family: var(--cds-font-mono); font-size: var(--cds-code-01-size); line-height: var(--cds-code-01-lh); letter-spacing: 0.32px; }
.muted           { color: var(--cds-text-secondary); }

/* ---- UI Shell header: 48px, Gray 100 in every theme ---- */
.cds-header {
  height: 3rem; flex: none; display: flex; align-items: center;
  background: #161616; color: #f4f4f4; border-bottom: 1px solid #393939;
}
.cds-header__name {
  display: flex; align-items: center; height: 100%; padding: 0 var(--cds-spacing-07) 0 var(--cds-spacing-05);
  color: #f4f4f4; text-decoration: none; border: 2px solid transparent;
  font-size: var(--cds-body-01-size); line-height: 1.125rem; letter-spacing: 0.1px; font-weight: 600; white-space: nowrap;
}
.cds-header__name:hover { color: #f4f4f4; border-bottom-color: transparent; }
.cds-header__name:focus-visible { outline: none; border-color: #ffffff; }
.cds-header__name .prefix { font-weight: 400; margin-right: var(--cds-spacing-02); }
.cds-header__sub { color: #c6c6c6; font-size: var(--cds-label-01-size); line-height: var(--cds-label-01-lh); letter-spacing: 0.32px; }
.cds-header__global { margin-left: auto; display: flex; align-items: stretch; height: 100%; }
.cds-header__global .user { align-self: center; font-weight: 600; padding: 0 var(--cds-spacing-03); }
.cds-header__global .tags { align-self: center; display: flex; gap: var(--cds-spacing-02); margin-right: var(--cds-spacing-03); }
.cds-header__global .tags span {
  display: inline-flex; align-items: center; height: 1.5rem; padding: 0 var(--cds-spacing-03); border-radius: var(--cds-radius-pill);
  background: #393939; color: #f4f4f4; font-size: var(--cds-label-01-size); line-height: var(--cds-label-01-lh); letter-spacing: 0.32px;
}
/* header actions: Carbon HeaderGlobalAction geometry (48px tall, no radius, hover one layer up) */
.cds-header__action {
  display: inline-flex; align-items: center; gap: var(--cds-spacing-03); height: 100%; padding: 0 var(--cds-spacing-05);
  background: transparent; color: #f4f4f4; border: 2px solid transparent; cursor: pointer;
  font-size: var(--cds-body-01-size); letter-spacing: 0.16px; transition: background var(--cds-duration-fast-02) var(--cds-motion-standard);
}
.cds-header__action:hover { background: #353535; }
.cds-header__action:active { background: #4c4c4c; }
.cds-header__action[aria-expanded="true"] { background: #393939; }
.cds-header__action:focus-visible { outline: none; border-color: #ffffff; }
.cds-header__action svg { width: 1.25rem; height: 1.25rem; fill: currentColor; flex: none; }

/* ---- buttons: square, left-aligned label, 48px default (lg), 32px sm ---- */
.cds-btn {
  display: inline-flex; align-items: center; min-height: 3rem; max-width: 20rem; padding: 0 3.9375rem 0 0.9375rem;
  border: 1px solid transparent; border-radius: 0; cursor: pointer; text-decoration: none; vertical-align: top;
  font-size: var(--cds-body-01-size); line-height: 1.125rem; letter-spacing: 0.16px;
  transition: background var(--cds-duration-fast-01) var(--cds-motion-standard), border-color var(--cds-duration-fast-01) var(--cds-motion-standard);
}
.cds-btn--sm { min-height: 2rem; padding-right: 3.9375rem; }
.cds-btn--primary { background: var(--cds-button-primary); color: var(--cds-text-on-color); }
.cds-btn--primary:hover { background: var(--cds-button-primary-hover); color: var(--cds-text-on-color); }
.cds-btn--primary:active { background: var(--cds-button-primary-active); }
.cds-btn--tertiary { background: transparent; color: var(--cds-button-tertiary); border-color: var(--cds-button-tertiary); padding-right: 0.9375rem; }
.cds-btn--tertiary:hover { background: var(--cds-button-tertiary-hover); border-color: var(--cds-button-tertiary-hover); color: var(--cds-text-on-color); }
.cds-btn--tertiary:active { background: var(--cds-button-primary-active); }
.cds-btn--ghost { background: transparent; color: var(--cds-link-primary); padding-right: 0.9375rem; }
.cds-btn--ghost:hover { background: var(--cds-background-hover); color: var(--cds-link-primary-hover); }
.cds-btn--ghost:active { background: var(--cds-background-active); }
.cds-btn:focus-visible { outline: 2px solid var(--cds-focus); outline-offset: -2px; box-shadow: inset 0 0 0 1px var(--cds-focus), inset 0 0 0 2px var(--cds-focus-inset); }
.cds-btn:disabled { background: var(--cds-layer-accent-01); border-color: var(--cds-layer-accent-01); color: var(--cds-text-disabled); cursor: not-allowed; }
a.cds-btn:hover { border-bottom-color: transparent; }

/* ---- tiles and tags ---- */
.cds-tile { background: var(--cds-layer-01); padding: var(--cds-spacing-05); }
.cds-tag {
  display: inline-flex; align-items: center; height: 1.5rem; padding: 0 var(--cds-spacing-03); border-radius: var(--cds-radius-pill);
  font-size: var(--cds-label-01-size); line-height: var(--cds-label-01-lh); letter-spacing: 0.32px; white-space: nowrap; max-width: 100%;
  background: var(--tag-gray-bg); color: var(--tag-gray-fg);
}
.cds-tag--green { background: var(--tag-green-bg); color: var(--tag-green-fg); }
.cds-tag--red   { background: var(--tag-red-bg);   color: var(--tag-red-fg); }
.cds-tag--blue  { background: var(--tag-blue-bg);  color: var(--tag-blue-fg); }
.cds-tag--gray  { background: var(--tag-gray-bg);  color: var(--tag-gray-fg); }
.cds-tag--warm  { background: var(--tag-warm-bg);  color: var(--tag-warm-fg); }
.badge { margin-right: var(--cds-spacing-03); }
/* Carbon AI label: the one place a pill with a blue stroke is allowed; marks the model's turns */
.cds-ai-label {
  display: inline-flex; align-items: center; height: 1.25rem; padding: 0 var(--cds-spacing-02); border-radius: var(--cds-radius-pill);
  border: 1px solid var(--ai-border); color: var(--ai-border); font-size: var(--cds-label-01-size); line-height: var(--cds-label-01-lh); font-weight: 600; letter-spacing: 0.32px;
}

/* ---- sign-in (shown only without a session) ---- */
.signin { flex: 1; padding: var(--cds-spacing-09) var(--cds-spacing-05); }
.signin-tile { max-width: 40rem; margin: 0 auto; padding: var(--cds-spacing-07); }
.signin-tile .cds-body-02 { margin-bottom: var(--cds-spacing-07); }

/* ---- workbench: chat left, trace right ---- */
.app { flex: 1; min-height: 0; display: grid; grid-template-columns: minmax(0, 3fr) minmax(22.5rem, 2fr); gap: var(--cds-spacing-05); padding: var(--cds-spacing-05); }
.chat, .trace { display: flex; flex-direction: column; min-height: 0; padding: 0; }

.messages { flex: 1; overflow: auto; padding: var(--cds-spacing-05); display: flex; flex-direction: column; gap: var(--cds-spacing-05); }
.msg { max-width: 85%; white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.user { align-self: flex-end; background: var(--cds-layer-02); padding: var(--cds-spacing-04) var(--cds-spacing-05); border-radius: var(--cds-radius-sm); }
.msg.assistant { align-self: flex-start; padding-left: var(--cds-spacing-05); border-left: 2px solid var(--cds-border-subtle-01); }
.msg.assistant::before { content: "AI"; display: inline-flex; align-items: center; height: 1.25rem; padding: 0 var(--cds-spacing-02); margin-bottom: var(--cds-spacing-02); border-radius: var(--cds-radius-pill); border: 1px solid var(--ai-border); color: var(--ai-border); font-size: var(--cds-label-01-size); line-height: var(--cds-label-01-lh); font-weight: 600; letter-spacing: 0.32px; }
.msg.assistant.error { border-left-color: var(--cds-support-error); }
.msg p { margin: 0 0 var(--cds-spacing-03); font-size: inherit; line-height: inherit; }
.msg p:last-child { margin: 0; }
.msg ul { margin: var(--cds-spacing-02) 0 var(--cds-spacing-03) 1.125rem; padding: 0; }
.msg code { font-family: var(--cds-font-mono); font-size: var(--cds-code-01-size); background: var(--cds-layer-accent-01); padding: 0 var(--cds-spacing-02); }
.msg .cursor { display: inline-block; width: 0.5rem; height: 1em; background: var(--cds-text-secondary); vertical-align: -0.125rem; animation: blink 1s steps(2) infinite; }
@keyframes blink { to { opacity: 0; } }

.chips { display: flex; flex-wrap: wrap; gap: var(--cds-spacing-03); padding: 0 var(--cds-spacing-05) var(--cds-spacing-03); }
.chips .cds-btn { max-width: none; }
.composer { display: flex; gap: var(--cds-spacing-03); padding: var(--cds-spacing-05); border-top: 1px solid var(--cds-border-subtle-00); align-items: flex-end; }
.cds-text-area {
  flex: 1; resize: none; max-height: 8.75rem; padding: 0.6875rem var(--cds-spacing-05);
  font: inherit; font-size: var(--cds-body-01-size); line-height: var(--cds-body-01-lh); letter-spacing: 0.16px;
  background: var(--cds-field-02); color: var(--cds-text-primary); border: none; border-bottom: 1px solid var(--cds-border-strong-01); border-radius: 0;
}
.cds-text-area::placeholder { color: var(--cds-text-placeholder); }
.cds-text-area:hover { background: var(--cds-field-hover-01); }
.cds-text-area:focus { outline: 2px solid var(--cds-focus); outline-offset: -2px; background: var(--cds-field-02); }
.composer .cds-btn { min-height: 2.625rem; padding-right: 0.9375rem; }

/* ---- trace panel: one card per tool call, a structured list with a status bar ---- */
.chat-actions { display: flex; gap: var(--cds-spacing-02); }
.msg.system { align-self: stretch; max-width: none; color: var(--cds-text-secondary); font-size: var(--cds-label-01-size); line-height: var(--cds-label-01-lh); letter-spacing: 0.32px; padding: var(--cds-spacing-02) 0; border-top: 1px solid var(--cds-border-subtle-00); }
.msg.system.error { color: var(--cds-text-error); }
.chat-head, .trace-head { display: flex; align-items: center; justify-content: space-between; padding: var(--cds-spacing-03) var(--cds-spacing-03) var(--cds-spacing-03) var(--cds-spacing-05); border-bottom: 1px solid var(--cds-border-subtle-00); }
.cards { flex: 1; overflow: auto; padding: var(--cds-spacing-05); display: flex; flex-direction: column; gap: var(--cds-spacing-04); }
.tcard { background: var(--cds-layer-02); border-left: 3px solid var(--cds-border-strong-01); padding: var(--cds-spacing-04) var(--cds-spacing-05); }
.tcard.ok { border-left-color: var(--cds-support-success); }
.tcard.fail { border-left-color: var(--cds-support-error); }
.tcard.pending { border-left-color: var(--cds-support-warning); }
.tcard .title { display: flex; justify-content: space-between; align-items: baseline; gap: var(--cds-spacing-03); font-weight: 600; margin-bottom: var(--cds-spacing-03); }
.tcard .title .t { font-family: var(--cds-font-mono); font-size: var(--cds-code-01-size); color: var(--cds-text-secondary); font-weight: 400; white-space: nowrap; }
.row { display: grid; grid-template-columns: 4.5rem 1fr; gap: var(--cds-spacing-03); padding: var(--cds-spacing-03) 0; border-top: 1px solid var(--cds-border-subtle-00); }
.row .k { color: var(--cds-text-secondary); font-size: var(--cds-label-01-size); line-height: var(--cds-label-01-lh); letter-spacing: 0.32px; padding-top: var(--cds-spacing-02); }
.row .v { min-width: 0; }
.row .v div { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.row .v .big { white-space: normal; }
.reason { color: var(--cds-text-primary); white-space: normal !important; }
.tcard.fail .reason { color: var(--cds-text-error); }

/* ---- access panel (why 200 or 403): a Carbon data table ---- */
.access { margin: var(--cds-spacing-05) var(--cds-spacing-05) 0; }
.access-head { display: flex; justify-content: space-between; align-items: flex-start; gap: var(--cds-spacing-05); margin-bottom: var(--cds-spacing-04); }
.access-head p { margin-top: var(--cds-spacing-02); max-width: 56rem; }
.access .err { color: var(--cds-text-error); }
.cds-table { width: 100%; border-collapse: collapse; font-size: var(--cds-body-01-size); line-height: var(--cds-body-01-lh); letter-spacing: 0.16px; }
.cds-table th { background: var(--cds-layer-accent-01); color: var(--cds-text-primary); text-align: left; font-weight: 600; padding: 0 var(--cds-spacing-05); height: 3rem; vertical-align: middle; }
.cds-table th .sub { display: block; font-weight: 400; font-family: var(--cds-font-mono); font-size: var(--cds-code-01-size); line-height: var(--cds-code-01-lh); color: var(--cds-text-secondary); }
.cds-table td { padding: 0 var(--cds-spacing-05); height: 3rem; border-top: 1px solid var(--cds-border-subtle-00); background: var(--cds-layer-02); vertical-align: middle; }
.cds-table tbody tr:hover td { background: var(--cds-layer-hover-01); }
.cds-table tr.asked td { background: var(--notification-info-bg); }
.cds-table td .mono { display: block; }
.cds-table td .tool { color: var(--cds-text-secondary); font-size: var(--cds-label-01-size); line-height: var(--cds-label-01-lh); }
.cds-table .by { display: block; font-family: var(--cds-font-mono); font-size: var(--cds-code-01-size); line-height: var(--cds-code-01-lh); color: var(--cds-text-secondary); margin-top: var(--cds-spacing-01); }
.access details { margin-top: var(--cds-spacing-04); }
.access summary { cursor: pointer; color: var(--cds-link-primary); }
.access summary:hover { color: var(--cds-link-primary-hover); }
.access pre { font-family: var(--cds-font-mono); font-size: var(--cds-code-01-size); line-height: var(--cds-code-01-lh); background: var(--cds-layer-02); padding: var(--cds-spacing-04) var(--cds-spacing-05); margin: var(--cds-spacing-03) 0 0; overflow: auto; white-space: pre; }

@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; grid-auto-rows: minmax(0, 1fr); padding: var(--cds-spacing-03); }
  .chat { min-height: 60vh; }
  .msg { max-width: 95%; }
  .cds-header__sub, .cds-header__action span { display: none; }
}