/* The window is the chat, under a bar of controls.
 *
 * The library paints the chat itself, and where each user's bubbles go
 * and what color they are reaches it as its table of names, not as CSS.
 * These rules paint the page around it and turn two of the settings
 * that are lengths, the text box's height and the size of the name over
 * a bubble, into overrides of the library's composer and its name; the
 * third, the widest a message gets, is the library's own token,
 * --rc-bubble-max-width, which the app sets on .app and needs no rule
 * here. The library's own CSS is in cascade layers, so these plain
 * rules win over it without matching its specificity.
 */

:root {
  --app-font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --app-bg: #ffffff;
  --app-fg: #1f2328;
  --app-muted: #59636e;
  --app-surface: #f6f8fa;
  --app-border: #d1d9e0;
  --app-accent: #0969da;
  --app-accent-fg: #ffffff;
  color-scheme: light;
}

/* Until the app has mounted and set data-theme, follow the system so the
 * first paint is not a white flash in a dark room. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --app-bg: #0d1117;
    --app-fg: #e6edf3;
    --app-muted: #9198a1;
    --app-surface: #161b22;
    --app-border: #3d444d;
    --app-accent: #4493f8;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --app-bg: #0d1117;
  --app-fg: #e6edf3;
  --app-muted: #9198a1;
  --app-surface: #161b22;
  --app-border: #3d444d;
  --app-accent: #4493f8;
  color-scheme: dark;
}

html,
body {
  height: 100%;
  margin: 0;
  background: var(--app-bg);
  color: var(--app-fg);
}

.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
}

.app > .rc-chat {
  flex: 1 1 0;
  min-height: 0;
}

/* ---- The controls ----------------------------------------------------- */

.controls {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  padding: 8px 16px;
  border-bottom: 1px solid var(--app-border);
  background: var(--app-surface);
  font: 13px / 1.4 var(--app-font);
  user-select: none;
}

.control-group {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.control-label {
  color: var(--app-muted);
}

.control-button,
.control-segment,
.control-users,
.control-new-user {
  box-sizing: border-box;
  height: 28px;
  padding: 0 10px;
  border: 1px solid var(--app-border);
  border-radius: 8px;
  background: var(--app-bg);
  color: var(--app-fg);
  font: inherit;
}

.control-button,
.control-segment,
.control-users {
  cursor: pointer;
}

.control-users {
  min-width: 110px;
}

.control-new-user {
  width: 110px;
  padding: 0 8px;
}

.control-button:hover:not(:disabled),
.control-segment:hover:not(:disabled),
.control-users:hover,
.control-new-user:hover {
  border-color: var(--app-accent);
}

.control-button:focus-visible,
.control-segment:focus-visible,
.control-users:focus-visible,
.control-new-user:focus-visible,
.control-color:focus-visible,
.control-width:focus-visible,
.control-sender-size:focus-visible {
  outline: 2px solid var(--app-accent);
  outline-offset: 1px;
}

.control-button:disabled,
.control-segment:disabled,
.control-color:disabled,
.control-sender-size:disabled {
  opacity: 0.45;
  cursor: default;
}

/* The name-size slider stands at the height of the other controls. */
.control-sender-size {
  box-sizing: border-box;
  width: 96px;
  height: 28px;
  margin: 0;
  accent-color: var(--app-accent);
  cursor: pointer;
}

/* The theme switch sits at the far right, whatever else is in the bar. */
.control-theme {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-width: 78px;
  margin-left: auto;
}

.control-icon {
  font-size: 1.1em;
  line-height: 1;
}

.control-segments {
  display: inline-flex;
}

.control-segment {
  border-radius: 0;
  margin-left: -1px;
}

.control-segment:first-child {
  border-radius: 8px 0 0 8px;
  margin-left: 0;
}

.control-segment:last-child {
  border-radius: 0 8px 8px 0;
}

.control-segment[aria-pressed="true"]:not(:disabled),
.control-toggle[aria-checked="true"]:not(:disabled) {
  position: relative;
  border-color: var(--app-accent);
  background: var(--app-accent);
  color: var(--app-accent-fg);
}

.control-color {
  box-sizing: border-box;
  width: 40px;
  height: 28px;
  padding: 2px 3px;
  border: 1px solid var(--app-border);
  border-radius: 8px;
  background: var(--app-bg);
  cursor: pointer;
}

.control-color:hover:not(:disabled) {
  border-color: var(--app-accent);
}

/* The width slider, with its readout beside it: the number, or Full,
 * kept to a fixed measure so the switches after it do not shift as the
 * value changes. */
.control-width {
  width: 120px;
  margin: 0;
  accent-color: var(--app-accent);
}

.control-width-readout {
  min-width: 3ch;
  font-variant-numeric: tabular-nums;
}

/* ---- The resizable text box ------------------------------------------- */

/* The composer's top edge is the handle: a hit zone across its width,
 * with a pill in the middle to show it is there. The app's pointer
 * handlers turn a drag of it into --app-input-height. */
.app .rc-composer {
  position: relative;
}

.app .rc-composer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 12px;
  cursor: row-resize;
}

.app .rc-composer::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 50%;
  width: 44px;
  height: 4px;
  margin-left: -22px;
  border-radius: 2px;
  background: var(--rc-border);
  pointer-events: none;
  transition: background 0.15s;
}

.app.app-resizing .rc-composer::after {
  background: var(--rc-accent);
}

.app.app-resizing {
  cursor: row-resize;
  user-select: none;
}

/* The library grows the box to fit its text and caps it at 30vh; the
 * dragged height is a floor under that, and lifts the cap with it. */
.app .rc-composer-input {
  min-height: var(--app-input-height, 42px);
  max-height: max(30vh, var(--app-input-height, 0px));
}

/* ---- The name over a bubble ------------------------------------------- */

/* The library sets the name over a bubble smaller than this app wants
 * it, and in its muted color. The bar's slider moves the size, through a
 * property the app always sets, and the color is the user's, the
 * `--name-accent` their look sets on their messages; this rule is
 * unlayered, so it wins over the library's theme layer. */
.app .rc-sender {
  font-size: var(--app-sender-size);
  color: var(--name-accent, var(--rc-muted));
}

/* The badge beside a name, drawn through the library's `sender`: its
 * initial in a small filled square, shown while Rich names is on. */
.app:not(.app-rich-names) .app-badge {
  display: none;
}

.app-badge {
  display: inline-block;
  min-width: 1.4em;
  margin-inline-start: 0.4em;
  padding: 0 0.2em;
  border-radius: 3px;
  background: var(--app-accent);
  color: var(--app-accent-fg);
  font-size: 0.8em;
  font-weight: 600;
  line-height: 1.4em;
  text-align: center;
}