/* =========================================================================
   chatalie — Wireon Design System.
   Functional Disruption. Bold, clear, monochrome. Ink on paper, zero radius.
   ========================================================================= */

:root {
  /* ---------- Color: ink & paper only ---------- */
  --ink: #000000;
  --paper: #ffffff;
  --ink-90: #1b1b1b;
  --ink-60: #727272;
  --ink-30: #afafaf;
  --ink-15: #d8d8d8;
  --ink-08: #e4e4e4;
  --ink-04: #f2f2f2;
  --ink-02: #f9f9f9;

  --fg-1: var(--ink);
  --fg-2: var(--ink-60);
  --fg-3: var(--ink-30);
  --bg-1: var(--paper);
  --bg-2: var(--ink-02);
  --bg-inverse: var(--ink);
  --fg-inverse: var(--paper);
  --rule-strong: var(--ink);
  --rule: var(--ink-90);
  --rule-soft: var(--ink-08);
  --danger: #b00020;

  /* ---------- Type ---------- */
  --font-display: 'Inter', 'Helvetica Neue', 'Helvetica', Arial, sans-serif;
  --font-ui: 'Inter', 'Helvetica Neue', 'Helvetica', Arial, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  --tr-tight: -0.02em;
  --tr-wide: 0.14em;

  /* ---------- Space ---------- */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 24px;
  --s-6: 32px;

  --bw-hair: 1px;
  --bw-rule: 2px;
  --bw-bar: 4px;
  --radius: 0px;

  --ease-editorial: cubic-bezier(0.2, 0.8, 0.2, 1);
  --dur-fast: 120ms;
  --dur: 200ms;
}

* {
  box-sizing: border-box;
}

/* The app toggles visibility via the `hidden` attribute (app.js show/hide).
   Component rules below set `display:`, which would otherwise out-specify the
   UA `[hidden]` rule and keep elements on screen — force `hidden` to win. */
[hidden] {
  display: none !important;
}

html,
body {
  height: 100%;
  margin: 0;
}

body {
  background: var(--bg-1);
  color: var(--fg-1);
  font-family: var(--font-ui);
  font-size: 14px;
  line-height: 1.55;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

button,
input,
textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

::selection {
  background: var(--ink);
  color: var(--paper);
}

.muted {
  color: var(--fg-2);
}

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

/* ---- progress bar ---------------------------------------------------- */

#progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--bw-bar);
  background: var(--ink-08);
  z-index: 100;
}

#progress-fill {
  height: 100%;
  width: 0%;
  background: var(--ink);
  transition: width 0.15s linear;
}

#progress-label {
  position: fixed;
  top: 8px;
  right: 10px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
  color: var(--fg-2);
  z-index: 100;
}

/* ---- app shell ------------------------------------------------------- */

.app {
  display: grid;
  grid-template-columns: 260px 1fr;
  height: 100vh;
  width: 100vw;
}

/* ============================================================
   SIDEBAR — inverse block.
   ============================================================ */

.sidebar {
  background: var(--bg-inverse);
  color: var(--fg-inverse);
  display: flex;
  flex-direction: column;
  border-right: var(--bw-rule) solid var(--ink);
  overflow: hidden;
  min-height: 0;
}

.sidebar__head {
  padding: var(--s-4) var(--s-4) var(--s-3);
  border-bottom: var(--bw-hair) solid rgba(255, 255, 255, 0.18);
}

.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--fg-inverse);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 26px;
  line-height: 1;
  letter-spacing: -0.045em;
  text-transform: lowercase;
}

.wordmark__dot {
  width: 7px;
  height: 7px;
  background: var(--fg-inverse);
  display: inline-block;
  transform: translateY(-1px);
}

.wordmark__tag {
  display: block;
  margin-top: 6px;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 10px;
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
}

.sidebar__newchat {
  margin: var(--s-3) var(--s-4) var(--s-3);
  padding: 9px 14px;
  background: var(--paper);
  color: var(--ink);
  border: var(--bw-hair) solid var(--paper);
  font-weight: 700;
  font-size: 14px;
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--dur) var(--ease-editorial),
    color var(--dur) var(--ease-editorial);
}

.sidebar__newchat:hover {
  background: var(--ink);
  color: var(--paper);
}

.sidebar__newchat .plus {
  font-weight: 900;
  font-size: 16px;
  line-height: 1;
}

.sidebar__search {
  margin: 0 var(--s-4) var(--s-3);
  padding: 7px 12px;
  border: var(--bw-hair) solid rgba(255, 255, 255, 0.22);
  background: transparent;
  color: var(--fg-inverse);
  font-size: 12px;
  outline: none;
}

.sidebar__search::placeholder {
  color: rgba(255, 255, 255, 0.45);
}

.sidebar__search:focus {
  border-color: var(--paper);
}

.sidebar__history {
  flex: 1 1 auto;
  overflow-y: auto;
  min-height: 0;
  padding: 0 var(--s-4) var(--s-4);
}

.sidebar__history::-webkit-scrollbar {
  width: 6px;
}

.sidebar__history::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.18);
}

.group__label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
  padding: var(--s-4) 0 var(--s-2);
  border-bottom: var(--bw-hair) solid rgba(255, 255, 255, 0.18);
  margin-bottom: var(--s-1);
}

.chat-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px var(--s-4);
  margin: 0 calc(var(--s-4) * -1);
  color: rgba(255, 255, 255, 0.85);
  font-size: 13px;
  line-height: 1.3;
  cursor: pointer;
  border-left: 2px solid transparent;
  transition: background var(--dur) var(--ease-editorial),
    color var(--dur) var(--ease-editorial),
    border-color var(--dur) var(--ease-editorial);
}

.chat-item:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--paper);
}

.chat-item.active {
  background: rgba(255, 255, 255, 0.1);
  color: var(--paper);
  border-left-color: var(--paper);
  font-weight: 600;
}

.chat-item .chat-title {
  flex: 1 1 auto;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-item .meta {
  font-variant-numeric: tabular-nums lining-nums;
  font-size: 10px;
  color: rgba(255, 255, 255, 0.4);
  flex-shrink: 0;
}

.chat-item .chat-del {
  visibility: hidden;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  padding: 0 2px;
  font-size: 14px;
  line-height: 1;
  flex-shrink: 0;
}

.chat-item:hover .meta {
  display: none;
}

.chat-item:hover .chat-del {
  visibility: visible;
}

.chat-item .chat-del:hover {
  color: var(--paper);
}

/* ============================================================
   MAIN — paper canvas.
   ============================================================ */

.main {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  background: var(--paper);
  min-width: 0;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-3);
  padding: var(--s-3) var(--s-4);
  border-bottom: var(--bw-rule) solid var(--ink);
  background: var(--paper);
  flex-shrink: 0;
}

.topbar__title {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  min-width: 0;
  overflow: hidden;
}

.topbar__overline {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
  color: var(--fg-2);
  white-space: nowrap;
  flex-shrink: 0;
}

.topbar__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: -0.03em;
  color: var(--ink);
  text-transform: lowercase;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar__actions {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  flex-shrink: 0;
}

.icon-btn {
  width: 30px;
  height: 30px;
  background: var(--paper);
  border: var(--bw-hair) solid var(--rule);
  color: var(--ink);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--dur) var(--ease-editorial),
    color var(--dur) var(--ease-editorial);
}

.icon-btn:hover {
  background: var(--ink);
  color: var(--paper);
}

.icon-btn svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: square;
  stroke-linejoin: miter;
}

.badge {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
  color: var(--ink);
  border: var(--bw-hair) solid var(--ink);
  padding: 3px 7px;
}

/* ---- thread ---------------------------------------------------------- */

.thread {
  flex: 1 1 auto;
  overflow-y: auto;
  min-height: 0;
}

.thread__inner {
  width: 100%;
}

#empty-state {
  padding: var(--s-6) var(--s-5);
  color: var(--fg-1);
}

#empty-state p {
  margin: 0 0 var(--s-1);
}

.msg {
  position: relative;
  padding: var(--s-4) var(--s-4) var(--s-4) var(--s-5);
  border-bottom: var(--bw-hair) solid var(--rule-soft);
}

.msg::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--bw-bar);
  background: var(--ink);
}

.msg.user {
  background: var(--ink-02);
}

.msg.user::before {
  background: var(--ink-30);
}

.msg.assistant {
  background: var(--paper);
}

.msg:last-child {
  border-bottom: none;
}

.msg.error .msg__body {
  color: var(--danger);
}

.msg__head {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  margin-bottom: var(--s-3);
}

.msg__badge {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 6px 10px;
  line-height: 1;
}

.msg.user .msg__badge {
  background: var(--paper);
  color: var(--ink);
  border: var(--bw-rule) solid var(--ink);
}

.msg.assistant .msg__badge {
  background: var(--ink);
  color: var(--paper);
  border: var(--bw-rule) solid var(--ink);
}

.msg__meta {
  font-size: 10px;
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
  color: var(--fg-2);
  font-variant-numeric: tabular-nums lining-nums;
}

.msg__body {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.msg.cursor .msg__body::after {
  content: '';
  display: inline-block;
  width: 8px;
  height: 1.05em;
  margin-left: 2px;
  background: var(--ink);
  vertical-align: text-bottom;
  animation: blink 1s steps(2, start) infinite;
}

@keyframes blink {
  to {
    visibility: hidden;
  }
}

/* ---- composer -------------------------------------------------------- */

.composer-wrap {
  border-top: var(--bw-rule) solid var(--ink);
  background: var(--paper);
  padding: var(--s-3) var(--s-4);
  flex-shrink: 0;
}

.composer {
  width: 100%;
  border: var(--bw-hair) solid var(--ink);
  background: var(--paper);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: stretch;
}

.composer__input {
  border: none;
  background: transparent;
  padding: 10px 12px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink);
  outline: none;
  resize: none;
  min-height: 42px;
  max-height: 40vh;
}

.composer__input::placeholder {
  color: var(--fg-2);
}

.composer__input:disabled {
  color: var(--fg-3);
}

.composer__actions {
  display: flex;
  align-items: stretch;
  border-left: var(--bw-hair) solid var(--ink);
}

.composer__send {
  background: var(--ink);
  color: var(--paper);
  border: none;
  padding: 0 18px;
  font-weight: 700;
  font-size: 11px;
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background var(--dur) var(--ease-editorial),
    color var(--dur) var(--ease-editorial), box-shadow var(--dur) var(--ease-editorial);
}

.composer__send:hover:not(:disabled) {
  background: var(--paper);
  color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--ink);
}

.composer__send:disabled {
  background: var(--ink-08);
  color: var(--fg-3);
  cursor: not-allowed;
}

.composer__send svg {
  width: 12px;
  height: 12px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: square;
}

.composer__send--stop {
  background: var(--paper);
  color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--ink);
}

.composer__send--stop svg {
  fill: currentColor;
  stroke: none;
}

.composer__foot {
  width: 100%;
  margin: var(--s-2) 0 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--s-3);
  font-size: 10px;
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
  color: var(--fg-2);
  font-weight: 600;
}

.composer__foot .model {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.composer__foot .model .square {
  width: 7px;
  height: 7px;
  background: var(--ink);
  display: inline-block;
  flex-shrink: 0;
}

.composer__foot #status-text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---- task panel (embedded) ------------------------------------------ */

/* Standalone-hidden; shown only in embedded mode (body.embedded below). */
#task-panel {
  flex: 0 0 auto;
  border-bottom: var(--bw-rule) solid var(--ink);
  padding: var(--s-3) var(--s-4);
  display: none;
  flex-direction: column;
  gap: var(--s-2);
  background: var(--bg-2);
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--s-1);
}

.field-label {
  color: var(--fg-2);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tr-wide);
}

.field-label em {
  color: var(--ink);
  font-style: normal;
}

#task-desc,
#task-content,
#sysprompt {
  background: var(--paper);
  border: var(--bw-hair) solid var(--ink);
  outline: none;
  padding: 7px 9px;
  resize: vertical;
  color: var(--ink);
}

#task-desc:focus,
#task-content:focus,
#sysprompt:focus {
  box-shadow: inset 0 0 0 1px var(--ink);
}

.task-actions {
  display: flex;
  gap: var(--s-2);
  margin-top: var(--s-1);
}

.task-actions button {
  background: var(--ink);
  border: var(--bw-hair) solid var(--ink);
  color: var(--paper);
  cursor: pointer;
  padding: 6px 14px;
  font-weight: 700;
  font-size: 11px;
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
  transition: background var(--dur) var(--ease-editorial),
    color var(--dur) var(--ease-editorial);
}

.task-actions button:hover:not(:disabled) {
  background: var(--paper);
  color: var(--ink);
}

.task-actions button:disabled {
  background: var(--ink-08);
  color: var(--fg-3);
  border-color: var(--ink-08);
  cursor: not-allowed;
}

/* ---- settings drawer ------------------------------------------------- */

#settings {
  position: fixed;
  top: 0;
  right: 0;
  width: 320px;
  max-width: 90vw;
  bottom: 0;
  background: var(--paper);
  border-left: var(--bw-rule) solid var(--ink);
  padding: var(--s-4);
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  z-index: 50;
  overflow-y: auto;
}

.settings-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--fg-2);
  text-transform: uppercase;
  letter-spacing: var(--tr-wide);
  font-size: 11px;
  font-weight: 600;
  padding-bottom: var(--s-2);
  border-bottom: var(--bw-rule) solid var(--ink);
}

#settings-close {
  background: none;
  border: none;
  color: var(--ink);
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
}

#settings-close:hover {
  color: var(--danger);
}

#temp {
  width: 100%;
  accent-color: var(--ink);
}

.model-info {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink);
  white-space: pre-wrap;
  background: var(--ink-04);
  padding: var(--s-2);
}

/* ---- load error ------------------------------------------------------ */

.load-error {
  position: fixed;
  bottom: var(--s-5);
  left: 50%;
  transform: translateX(-50%);
  background: var(--paper);
  border: var(--bw-rule) solid var(--danger);
  color: var(--danger);
  padding: var(--s-2) var(--s-3);
  display: flex;
  align-items: center;
  gap: var(--s-3);
  z-index: 80;
  max-width: 90vw;
  font-size: 13px;
}

.load-error button {
  background: var(--danger);
  border: var(--bw-hair) solid var(--danger);
  color: var(--paper);
  cursor: pointer;
  padding: 3px 10px;
  font-weight: 700;
  font-size: 11px;
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
}

.load-error button:hover {
  background: var(--paper);
  color: var(--danger);
}

/* ---- mode toggles ---------------------------------------------------- */

/* Sidebar collapsed (standalone toggle). */
body.sidebar-collapsed .app {
  grid-template-columns: 0 1fr;
}

body.sidebar-collapsed #sidebar {
  display: none;
}

/* Embedded mode: no sidebar; show task panel. */
body.embedded .app {
  grid-template-columns: 1fr;
}

body.embedded #sidebar,
body.embedded #sidebar-toggle {
  display: none;
}

body.embedded #task-panel {
  display: flex;
}

body.embedded #send-to-host {
  display: inline-flex;
}

/* Standalone: hide host-only controls. */
body:not(.embedded) #send-to-host {
  display: none;
}

/* Disable interactive bits until a model is ready. */
body.loading .composer__input,
body.loading .composer__send {
  opacity: 0.7;
}

/* ---- responsive ------------------------------------------------------ */

@media (max-width: 720px) {
  .app {
    grid-template-columns: 0 1fr;
  }
  #sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 260px;
    z-index: 60;
    transform: translateX(-100%);
    transition: transform var(--dur) var(--ease-editorial);
  }
  body:not(.sidebar-collapsed) #sidebar {
    transform: translateX(0);
  }
}