/*
 * The chat surface.
 *
 * Loaded after `style.css`, and deliberately an *overlay* rather than a rewrite:
 * the console's rules still own the layout, the panels and every dialog, and this
 * file re-dresses the conversation itself — the column, the messages, the tool
 * cards, the composer, and the two surfaces the console did not have (a command
 * palette and follow-up chips).
 *
 * It is built entirely from the names `style.css` already aliases onto the Unity
 * tokens (`--bg*`, `--border`, `--text*`, `--accent*`), so light mode, dark mode
 * and the family theme keep working. Nothing here hard-codes a colour that would
 * survive a theme switch badly.
 */

/* ---------------------------------------------------------------- the column */

.messages {
  padding: 28px 20px 12px;
  scroll-behavior: smooth;
}

.msg {
  max-width: 780px;
  margin: 0 auto 22px;
}

/* A user turn is a bubble on the right; an agent turn is the page. That is the
   whole visual grammar: what you said is a message, what it did is a document. */
.msg-user {
  width: fit-content;
  margin-left: auto;
  margin-right: 0;
  max-width: min(78%, 620px);
  padding: 11px 15px;
  border: 1px solid color-mix(in oklab, var(--accent) 26%, var(--border));
  border-radius: 16px 16px 4px 16px;
  background: color-mix(in oklab, var(--accent) 10%, var(--bg-panel));
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}

.msg-assistant {
  padding: 0 2px;
  line-height: 1.72;
  font-size: 14.5px;
}

.msg-assistant p { margin: 0 0 12px; }

.msg-assistant pre {
  margin: 12px 0;
  padding: 13px 15px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-sunken, var(--bg-raised));
  overflow-x: auto;
}

.msg-assistant code {
  font-family: var(--mono);
  font-size: 12.75px;
  padding: 1px 5px;
  border-radius: 6px;
  background: color-mix(in oklab, var(--text) 7%, transparent);
}

.msg-assistant pre code { padding: 0; background: none; }

.msg-assistant h1,
.msg-assistant h2,
.msg-assistant h3 {
  margin: 20px 0 9px;
  font-size: 15.5px;
  letter-spacing: -0.01em;
}

.msg-assistant .li { padding-left: 2px; margin: 5px 0; }

/* A caret while the answer is still arriving, so a pause reads as work. */
.msg-assistant.cursor::after {
  content: "▍";
  color: var(--accent);
  animation: genie-blink 1.05s steps(2, start) infinite;
}

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

/* ------------------------------------------------------------- tool cards */

.tool {
  margin: 10px 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-panel);
  overflow: hidden;
  transition: border-color 120ms ease, box-shadow 120ms ease, transform 120ms ease;
}

.tool:hover {
  border-color: color-mix(in oklab, var(--accent) 30%, var(--border));
  box-shadow: var(--shadow-card, 0 1px 2px rgb(0 0 0 / 0.12));
}

.tool summary {
  padding: 9px 12px;
  gap: 8px;
  font-size: 12.5px;
  cursor: pointer;
}

.tool-name {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
}

.tool-arg { font-family: var(--mono); font-size: 12px; }

.tool-stat {
  font-family: var(--mono);
  font-size: 11px;
  padding: 1px 7px;
  border-radius: var(--radius-pill, 999px);
  background: color-mix(in oklab, var(--text) 8%, transparent);
}

.tool-body,
.tool-content {
  border-top: 1px solid var(--border);
  background: var(--surface-sunken, var(--bg-raised));
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
}

/* --------------------------------------------------------------- approvals */

.approval {
  margin: 12px 0;
  border: 1px solid var(--border);
  border-left: 3px solid var(--warn);
  border-radius: 12px;
  background: var(--bg-panel);
  overflow: hidden;
}

.approval-head { padding: 12px 14px; gap: 6px; }
.approval-title { font-size: 13.5px; }
.approval-summary { font-family: var(--mono); font-size: 11.75px; }

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

/*
 * The composer floats: a rounded panel with its own border that brightens when
 * it has focus, so the box you are typing in is obvious without a heavy focus
 * outline around a bare textarea. The hint row underneath is where the palette
 * tells you it exists.
 */
.composer {
  position: relative;
  margin: 0 auto 14px;
  width: min(100%, 820px);
  padding: 10px 12px;
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--bg-panel);
  box-shadow: var(--shadow-card, 0 2px 8px rgb(0 0 0 / 0.10));
  transition: border-color 140ms ease, box-shadow 140ms ease;
}

.composer:focus-within {
  border-color: color-mix(in oklab, var(--accent) 55%, var(--border));
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--accent) 14%, transparent),
    var(--shadow-card, 0 2px 8px rgb(0 0 0 / 0.10));
}

.composer textarea {
  border: none;
  background: transparent;
  padding: 6px 4px;
  font-size: 14.5px;
  line-height: 1.55;
  resize: none;
}

.composer textarea:focus { outline: none; }

#send {
  border-radius: var(--radius-pill, 999px);
  padding: 0 18px;
  font-weight: 600;
}

.composer-hint {
  width: min(100%, 820px);
  margin: 0 auto 10px;
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 11.5px;
  color: var(--text-dim);
}

.composer-hint kbd {
  font-family: var(--mono);
  font-size: 10.5px;
  padding: 1px 5px;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: var(--bg-raised);
  color: var(--text);
}

/* ------------------------------------------------------------- the palette */

/*
 * The command palette, anchored above the composer. It is a listbox: the rows
 * carry `role=option` and the input owns `aria-activedescendant`, so a screen
 * reader follows the keyboard selection rather than only the text.
 */
.palette {
  position: absolute;
  left: 0;
  right: 0;
  bottom: calc(100% + 8px);
  max-height: 320px;
  overflow-y: auto;
  padding: 6px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg-panel);
  box-shadow: var(--shadow-pop, 0 12px 32px rgb(0 0 0 / 0.28));
  z-index: 40;
}

.palette-group {
  padding: 8px 10px 4px;
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.palette-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 9px;
  cursor: pointer;
}

.palette-row:hover { background: var(--bg-hover); }

.palette-row.active {
  background: color-mix(in oklab, var(--accent) 16%, transparent);
}

.palette-row .palette-name {
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}

.palette-row .palette-desc {
  font-size: 12px;
  color: var(--text-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.palette-empty {
  padding: 12px;
  font-size: 12px;
  color: var(--text-dim);
}

/* --------------------------------------------------------- follow-up chips */

/*
 * What to do next, offered where the turn ended. Chips rather than links: they
 * fill the composer, so the suggestion is editable before it is sent rather
 * than being a command the console runs on your behalf.
 */
.followups {
  max-width: 780px;
  margin: -6px auto 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.followups-label {
  width: 100%;
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.followup {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill, 999px);
  background: var(--bg-panel);
  color: var(--text);
  font-size: 12.25px;
  font-family: inherit;
  cursor: pointer;
  transition: border-color 120ms ease, transform 120ms ease, background 120ms ease;
}

.followup:hover {
  border-color: color-mix(in oklab, var(--accent) 45%, var(--border));
  background: color-mix(in oklab, var(--accent) 9%, var(--bg-panel));
  transform: translateY(-1px);
}

/* --------------------------------------------------------------- the chrome */

.sidebar { border-right: 1px solid var(--border); }

.sidebar-head {
  padding: 14px 14px 10px;
}

.sidebar-head .brand {
  font-weight: 650;
  letter-spacing: -0.01em;
}

.sessions { padding: 6px 8px; }

.sessions .session-row,
.sessions a,
.sessions button {
  border-radius: 10px;
}

.topbar {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg-panel) 88%, transparent);
  backdrop-filter: blur(6px);
}

.chat-title {
  font-weight: 600;
  letter-spacing: -0.01em;
  max-width: 46ch;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* A thin bar reads as progress; a thick one competes with the transcript. */
.turn-progress-track { height: 3px; border-radius: 999px; }
.turn-progress-label { font-size: 11px; }

/* Empty state, when the console has one: give it the room a welcome deserves. */
.empty {
  max-width: 640px;
  margin: 6vh auto 0;
  text-align: center;
  color: var(--text-dim);
}

/* Subtle scrollbars: the transcript is long, and a bright bar is the loudest
   thing on a quiet page. */
.messages,
.palette,
.files-list,
.tool-body {
  scrollbar-width: thin;
  scrollbar-color: color-mix(in oklab, var(--text) 22%, transparent) transparent;
}

.messages::-webkit-scrollbar,
.palette::-webkit-scrollbar,
.files-list::-webkit-scrollbar { width: 10px; }

.messages::-webkit-scrollbar-thumb,
.palette::-webkit-scrollbar-thumb,
.files-list::-webkit-scrollbar-thumb {
  border: 3px solid transparent;
  background-clip: content-box;
  border-radius: 999px;
  background-color: color-mix(in oklab, var(--text) 22%, transparent);
}

@media (max-width: 720px) {
  .msg-user { max-width: 92%; }
  .messages { padding: 18px 12px 8px; }
  .followups { margin-left: 0; margin-right: 0; }
  /* A home indicator is drawn over the bottom of the page, and the composer is
     the one thing on it that must never be behind anything. */
  .composer { margin-bottom: calc(12px + env(safe-area-inset-bottom)); }
  /* Anchored above the composer, so the palette can only ever be as tall as the
     room over it; three quarters of a phone's height would cover the box it
     belongs to. */
  .palette { max-height: 52vh; }
  .composer-hint { flex-wrap: wrap; gap: 6px; }
}