/*
 * @bitbaum/chatkit — the look of the one chat.
 *
 * Every colour, radius and face is a --ck-* variable. By default they read
 * @bitbaum/design-tokens' HSL-triplet variables, so apps on those tokens match
 * without doing anything. An app whose variables are full colours (loki's are
 * OKLCH under the same names) maps them once — `:root { --ck-bg:
 * var(--surface-base); … }` — and any other app sets --ck-* to keep its own
 * look. The BEHAVIOUR is what is shared, and it is not configurable.
 *
 * Non-negotiable, and why:
 *  - 16px text in the input and the messages: under 16px iOS zooms the whole
 *    page when the input is focused (loki globals.css).
 *  - 44px touch targets on every control (WCAG 2.5.8, loki's audit).
 *  - Nothing wider than its container at 320px (min-width: 0 on flex rows —
 *    heidi composer.tsx).
 */

:where(:root) {
  /* Defaults at ZERO specificity on the root: an app's own :root (or any
     container) rule setting a --ck-* variable always wins. Declaring these on
     the chat's elements instead would silently override the app. */
  --ck-bg: hsl(var(--surface-base, 0 0% 100%));
  --ck-raised: hsl(var(--surface-raised, 0 0% 96%));
  --ck-overlay: hsl(var(--surface-overlay, 0 0% 98%));
  --ck-fg: hsl(var(--text-primary, 0 0% 10%));
  --ck-fg-2: hsl(var(--text-secondary, 0 0% 30%));
  --ck-fg-3: hsl(var(--text-tertiary, 0 0% 42%));
  --ck-muted: hsl(var(--text-muted, 0 0% 50%));
  --ck-line: hsl(var(--border-subtle, 0 0% 90%));
  --ck-line-2: hsl(var(--border-default, 0 0% 82%));
  --ck-accent: var(--accent-primary, #ff5c00);
  --ck-on-accent: hsl(var(--on-accent, 0 0% 8%));
  --ck-accent-soft: color-mix(in srgb, var(--ck-accent) 14%, transparent);
  --ck-danger: hsl(var(--status-negative, 0 65% 50%));
  --ck-danger-soft: color-mix(in srgb, var(--ck-danger) 12%, transparent);
  --ck-on-danger: #fff;
  --ck-warning: hsl(var(--status-warning, 38 92% 45%));
  --ck-radius: 1rem;
  --ck-radius-sm: var(--radius-control, 0.5rem);
  --ck-font: var(--font-sans, system-ui, -apple-system, "Segoe UI", sans-serif);
  --ck-mono: var(--font-mono, ui-monospace, "SF Mono", Menlo, monospace);
  --ck-text: 1rem;
  --ck-leading: 1.6;
  --ck-target: 2.75rem;
}

.ck-composer-wrap,
.ck-thread-wrap,
.ck-starters {
  font-family: var(--ck-font);
  color: var(--ck-fg);
}

.ck-composer-wrap *,
.ck-thread-wrap *,
.ck-starters * {
  box-sizing: border-box;
}

/* ── composer ───────────────────────────────────────────────────────────── */
.ck-composer-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 0;
}
.ck-composer-frame {
  position: relative;
  min-width: 0;
}
.ck-composer {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 0;
  padding: 0.75rem 0.75rem 0.625rem;
  border: 1px solid var(--ck-line);
  border-radius: var(--ck-radius);
  background: var(--ck-bg);
  transition: border-color 0.15s ease;
}
.ck-composer:focus-within {
  border-color: var(--ck-line-2);
}
.ck-composer-compact {
  gap: 0.375rem;
  padding: 0.5rem;
  border-radius: calc(var(--ck-radius) * 0.75);
}
.ck-input {
  display: block;
  width: 100%;
  min-height: 2.5rem;
  max-height: 15rem;
  resize: none;
  overflow-y: auto;
  padding: 0.375rem 0.25rem;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--ck-fg);
  font: inherit;
  font-size: max(16px, var(--ck-text));
  line-height: var(--ck-leading);
}
.ck-input::placeholder {
  color: var(--ck-muted);
}
.ck-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  min-width: 0;
}
.ck-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem;
  min-width: 0;
}
.ck-submit {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}
.ck-hint {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--ck-muted);
  font-size: 0.8125rem;
}
@media (max-width: 480px) {
  .ck-hint {
    display: none;
  }
}
.ck-icon-btn,
.ck-send {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  min-width: var(--ck-target);
  min-height: var(--ck-target);
  padding: 0;
  border-radius: 999px;
  font-size: 1.125rem;
  cursor: pointer;
  transition:
    background 0.15s ease,
    color 0.15s ease,
    border-color 0.15s ease,
    opacity 0.15s ease;
}
.ck-icon-btn {
  border: 1px solid var(--ck-line);
  background: var(--ck-raised);
  color: var(--ck-fg-2);
}
.ck-icon-btn:hover:not(:disabled) {
  border-color: var(--ck-line-2);
  color: var(--ck-fg);
}
.ck-mic-on {
  border-color: var(--ck-danger);
  background: var(--ck-danger-soft);
  color: var(--ck-danger);
}
.ck-send {
  border: 0;
  background: var(--ck-accent);
  color: var(--ck-on-accent);
}
.ck-send:hover:not(:disabled) {
  opacity: 0.9;
}
.ck-send:disabled,
.ck-icon-btn:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}
.ck-send:disabled {
  background: var(--ck-raised);
  color: var(--ck-muted);
  opacity: 1;
}
.ck-send-stop {
  background: var(--ck-raised);
  color: var(--ck-fg);
  border: 1px solid var(--ck-line-2);
}
:where(.ck-composer-wrap, .ck-thread-wrap, .ck-starters) button:focus-visible,
.ck-input:focus-visible {
  outline: 2px solid var(--ck-accent);
  outline-offset: 2px;
}
.ck-input:focus-visible {
  outline: none;
}
.ck-modes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}
.ck-mode {
  min-height: 2rem;
  padding: 0 0.75rem;
  border: 1px solid var(--ck-line);
  border-radius: 999px;
  background: transparent;
  color: var(--ck-fg-2);
  font: inherit;
  font-size: 0.875rem;
  cursor: pointer;
}
.ck-mode[aria-pressed="true"] {
  border-color: var(--ck-accent);
  background: var(--ck-accent-soft);
  color: var(--ck-fg);
}

/* voice: the bar covers the box while a take is live, so what is happening —
   and how to keep or throw it away — is unmissable */
.ck-voice-bar {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0 0.75rem;
  border: 1px solid var(--ck-line-2);
  border-radius: var(--ck-radius);
  background: var(--ck-bg);
  color: var(--ck-fg-2);
}
.ck-voice-dot {
  width: 0.625rem;
  height: 0.625rem;
  flex-shrink: 0;
  border-radius: 999px;
  background: var(--ck-danger);
  animation: ck-pulse 1.2s ease-in-out infinite;
}
.ck-voice-wave {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  height: 1.75rem;
  min-width: 0;
  overflow: hidden;
}
.ck-voice-wave > span {
  width: 0.25rem;
  height: 100%;
  border-radius: 999px;
  background: var(--ck-accent);
  transform: scaleY(0.3);
  animation: ck-wave 1s ease-in-out infinite;
}
.ck-voice-wave > span:nth-child(2n) {
  animation-delay: -0.3s;
}
.ck-voice-wave > span:nth-child(3n) {
  animation-delay: -0.6s;
}
.ck-voice-wave > span:nth-child(5n) {
  animation-delay: -0.8s;
}
.ck-voice-timer {
  flex-shrink: 0;
  font-size: 0.9375rem;
  font-variant-numeric: tabular-nums;
}
.ck-voice-confirm {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: var(--ck-target);
  min-height: var(--ck-target);
  border: 0;
  border-radius: 999px;
  background: var(--ck-danger);
  color: var(--ck-on-danger);
  font-size: 1.125rem;
  cursor: pointer;
}
.ck-problem {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin: 0;
  padding: 0.5rem 0.625rem;
  border: 1px solid color-mix(in srgb, var(--ck-warning) 40%, transparent);
  border-radius: var(--ck-radius-sm);
  color: var(--ck-fg-2);
  font-size: 0.9375rem;
  line-height: 1.45;
}
.ck-problem > span {
  flex: 1;
  min-width: 0;
}
.ck-problem-x {
  display: inline-flex;
  flex-shrink: 0;
  padding: 0.125rem;
  border: 0;
  background: transparent;
  color: var(--ck-muted);
  cursor: pointer;
}

/* attachments */
.ck-attach-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}
.ck-attach-item {
  position: relative;
}
.ck-attach-thumb {
  display: block;
  width: 3.5rem;
  height: 3.5rem;
  object-fit: cover;
  border: 1px solid var(--ck-line);
  border-radius: var(--ck-radius-sm);
}
.ck-attach-file {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  max-width: 11rem;
  height: 3.5rem;
  padding: 0 0.5rem;
  border: 1px solid var(--ck-line);
  border-radius: var(--ck-radius-sm);
  background: var(--ck-raised);
  color: var(--ck-fg-2);
  font-size: 0.8125rem;
}
.ck-attach-remove {
  position: absolute;
  top: -0.5rem;
  right: -0.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border: 1px solid var(--ck-line-2);
  border-radius: 999px;
  background: var(--ck-overlay);
  color: var(--ck-fg-2);
  font-size: 0.75rem;
  cursor: pointer;
}
.ck-attach-remove::after {
  content: "";
  position: absolute;
  inset: -0.625rem;
}
.ck-note {
  border: 0;
  background: transparent;
  color: var(--ck-warning);
  font: inherit;
  font-size: 0.8125rem;
  text-align: left;
  cursor: pointer;
}
.ck-truncate {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── thread ─────────────────────────────────────────────────────────────── */
.ck-thread-wrap {
  position: relative;
  display: flex;
  flex: 1;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
}
.ck-thread {
  display: flex;
  flex: 1;
  flex-direction: column;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 0.5rem 0;
}
.ck-thread-inner {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: auto;
  min-width: 0;
}
.ck-thread-loading {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: center;
  color: var(--ck-muted);
}
.ck-turn {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.ck-turn-user {
  align-items: flex-end;
}
.ck-bubble {
  max-width: min(85%, 42rem);
  padding: 0.625rem 1rem;
  border-radius: calc(var(--ck-radius) * 1.25);
  background: var(--ck-accent-soft);
  color: var(--ck-fg);
  font-size: var(--ck-text);
  line-height: var(--ck-leading);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.ck-speaker {
  margin-bottom: 0.25rem;
  color: var(--ck-fg-3);
  font-family: var(--ck-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.ck-turn-actions {
  display: flex;
  gap: 0.25rem;
  margin-top: 0.25rem;
}
.ck-action {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  min-height: 2.25rem;
  padding: 0 0.5rem;
  border: 0;
  border-radius: var(--ck-radius-sm);
  background: transparent;
  color: var(--ck-muted);
  font: inherit;
  font-size: 0.875rem;
  cursor: pointer;
}
.ck-action:hover {
  background: var(--ck-raised);
  color: var(--ck-fg-2);
}
@media (hover: hover) {
  .ck-turn-answer .ck-turn-actions {
    opacity: 0;
    transition: opacity 0.15s ease;
  }
  .ck-turn-answer:hover .ck-turn-actions,
  .ck-turn-answer:focus-within .ck-turn-actions,
  .ck-turn-pinned .ck-turn-actions {
    opacity: 1;
  }
}
.ck-failed {
  margin: 0;
  padding: 0.625rem 0.875rem;
  border: 1px solid color-mix(in srgb, var(--ck-danger) 35%, transparent);
  border-radius: var(--ck-radius-sm);
  background: var(--ck-danger-soft);
  color: var(--ck-fg);
  font-size: var(--ck-text);
}
.ck-live {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  color: var(--ck-fg-3);
  font-size: var(--ck-text);
}
.ck-dots {
  display: inline-flex;
  gap: 0.25rem;
}
.ck-dots > span {
  width: 0.375rem;
  height: 0.375rem;
  border-radius: 999px;
  background: var(--ck-muted);
  animation: ck-dot 1.2s ease-in-out infinite;
}
.ck-dots > span:nth-child(2) {
  animation-delay: 0.15s;
}
.ck-dots > span:nth-child(3) {
  animation-delay: 0.3s;
}
.ck-stop {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  align-self: flex-start;
  min-height: 2.25rem;
  margin-top: 0.5rem;
  padding: 0 0.875rem;
  border: 1px solid var(--ck-line);
  border-radius: 999px;
  background: transparent;
  color: var(--ck-fg-3);
  font: inherit;
  font-size: 0.875rem;
  cursor: pointer;
}
.ck-stopped {
  margin: 0;
  color: var(--ck-muted);
}
.ck-jump {
  position: absolute;
  bottom: 0.75rem;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--ck-target);
  height: var(--ck-target);
  border: 1px solid var(--ck-line-2);
  border-radius: 999px;
  background: var(--ck-overlay);
  color: var(--ck-fg-2);
  font-size: 1.125rem;
  cursor: pointer;
  box-shadow: 0 6px 20px -8px rgb(0 0 0 / 0.35);
}

/* markdown: 16px, readable measure, no leaked ** or > */
.ck-md {
  min-width: 0;
  color: var(--ck-fg);
  font-size: var(--ck-text);
  line-height: var(--ck-leading);
  overflow-wrap: anywhere;
}
.ck-md > * {
  margin: 0;
}
.ck-md > * + * {
  margin-top: 0.75em;
}
.ck-md ul,
.ck-md ol {
  padding-left: 1.25em;
}
.ck-md li + li {
  margin-top: 0.25em;
}
.ck-md-h {
  font-weight: 650;
}
.ck-md blockquote {
  padding-left: 0.875em;
  border-left: 3px solid var(--ck-line-2);
  color: var(--ck-fg-2);
}
.ck-md strong {
  font-weight: 650;
}
.ck-code {
  padding: 0.1em 0.35em;
  border-radius: 0.3em;
  background: var(--ck-raised);
  font-family: var(--ck-mono);
  font-size: 0.875em;
}
.ck-pre {
  overflow-x: auto;
  padding: 0.75rem 0.875rem;
  border: 1px solid var(--ck-line);
  border-radius: var(--ck-radius-sm);
  background: var(--ck-raised);
  font-family: var(--ck-mono);
  font-size: 0.875rem;
  line-height: 1.55;
}
.ck-pre code {
  white-space: pre;
}
.ck-link {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--ck-accent);
  text-underline-offset: 0.18em;
}
.ck-cite {
  margin-left: 0.15em;
  color: var(--ck-muted);
  font-size: 0.7em;
  cursor: help;
}

/* starters */
.ck-starters {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-width: 0;
}
.ck-starters-title {
  color: var(--ck-fg-2);
  font-size: var(--ck-text);
}
.ck-starters-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.ck-starter {
  min-height: var(--ck-target);
  padding: 0.5rem 0.875rem;
  border: 1px solid var(--ck-line);
  border-radius: calc(var(--ck-radius) * 0.75);
  background: var(--ck-bg);
  color: var(--ck-fg-2);
  font: inherit;
  font-size: 0.9375rem;
  text-align: left;
  cursor: pointer;
}
.ck-starter:hover {
  border-color: var(--ck-accent);
  color: var(--ck-fg);
}

.ck-spin {
  animation: ck-spin 0.9s linear infinite;
}
@keyframes ck-spin {
  to {
    transform: rotate(360deg);
  }
}
@keyframes ck-pulse {
  50% {
    opacity: 0.35;
  }
}
@keyframes ck-wave {
  50% {
    transform: scaleY(1);
  }
}
@keyframes ck-dot {
  0%,
  80%,
  100% {
    opacity: 0.3;
  }
  40% {
    opacity: 1;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ck-spin,
  .ck-voice-dot,
  .ck-voice-wave > span,
  .ck-dots > span {
    animation: none;
  }
}