/* Playground client.
 *
 * The chat surface deliberately copies the proportions and colour relationships of
 * a real WhatsApp Web window — bubble widths, tail shape, tick colours, the 24h
 * window chip — because the point of the playground is to see what the customer
 * will see. Presentation lives here in the browser rather than in Python, which is
 * also what keeps every channel name out of the service's source.
 */

:root {
  color-scheme: dark light;

  --wa-teal: #00a884;
  --wa-blue-tick: #53bdeb;

  /* dark, the default — matches the rest of the tooling */
  --bg: #0b141a;
  --panel: #111b21;
  --panel-2: #202c33;
  --panel-3: #2a3942;
  --line: #222d34;
  --text: #e9edef;
  --muted: #8696a0;
  --bubble-in: #202c33;
  --bubble-out: #005c4b;
  --chat-bg: #0b141a;
  --chat-tint: rgba(255, 255, 255, .02);
  --accent: var(--wa-teal);
  --danger: #f15c6d;
  --warn: #ffb02e;
  --ok: #00a884;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #d9dbd4;
    --panel: #ffffff;
    --panel-2: #f0f2f5;
    --panel-3: #e9edef;
    --line: #e9edef;
    --text: #111b21;
    --muted: #667781;
    --bubble-in: #ffffff;
    --bubble-out: #d9fdd3;
    --chat-bg: #efeae2;
    --chat-tint: rgba(0, 0, 0, .015);
  }
}

* { box-sizing: border-box; }

/* `hidden` must win. The UA rule is `[hidden] { display: none }`, which any
 * explicit `display` below (`#log`, `.pane-head`, `#new-persona`) overrides — so
 * without this the chat header and the persona form render before a chat is
 * selected. */
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  height: 100vh;
  overflow: hidden;
}

#app {
  height: 100vh;
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr) 0;
  transition: grid-template-columns .18s ease;
}
#app.drawer-open { grid-template-columns: 340px minmax(0, 1fr) 400px; }

@media (max-width: 1100px) {
  #app, #app.drawer-open { grid-template-columns: 280px minmax(0, 1fr) 0; }
  #app.drawer-open #drawer { display: none; }
}

.grow { flex: 1; min-width: 0; }

/* ── shared chrome ──────────────────────────────────────────────────────── */

.pane-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  min-height: 60px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--line);
}

button {
  font: inherit;
  color: var(--text);
  background: var(--panel-3);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 12px;
  cursor: pointer;
}
button:hover { filter: brightness(1.15); }
button:disabled { opacity: .45; cursor: not-allowed; }
button.primary {
  background: var(--wa-teal);
  border-color: var(--wa-teal);
  color: #05231c;
  font-weight: 600;
}
button.icon {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 17px;
  line-height: 1;
  padding: 8px 9px;
  border-radius: 50%;
}
button.icon:hover { background: var(--panel-3); color: var(--text); }
button.link {
  background: none;
  border: none;
  color: var(--wa-blue-tick);
  padding: 0;
  font-size: 13px;
}

input[type=text], select {
  width: 100%;
  padding: 10px 13px;
  border-radius: 8px;
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--text);
  font: inherit;
}
input[type=text]:focus, select:focus { outline: none; border-color: var(--wa-teal); }

.avatar {
  width: 40px; height: 40px;
  flex: 0 0 40px;
  border-radius: 50%;
  background: var(--panel-3);
  color: var(--muted);
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .02em;
  -webkit-user-select: none;
  user-select: none;
}
.avatar.me { background: var(--wa-teal); color: #05231c; }

.chip {
  font: 11px/1 var(--mono);
  padding: 5px 8px;
  border-radius: 999px;
  background: var(--panel-3);
  border: 1px solid var(--line);
  color: var(--muted);
  white-space: nowrap;
}
.chip.ok   { color: var(--ok); border-color: #14513f; }
.chip.warn { color: var(--warn); border-color: #59440f; }
.chip.err  { color: var(--danger); border-color: #5a2229; }

/* ── sidebar ────────────────────────────────────────────────────────────── */

#sidebar {
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--panel);
  border-right: 1px solid var(--line);
}

#new-persona {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--panel-2);
}
#new-persona .row { display: flex; gap: 8px; }
#new-persona .row button { flex: 1; }

#persona-list { flex: 1; overflow-y: auto; }

.persona {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 11px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--line);
}
.persona:hover { background: var(--panel-2); }
.persona.active { background: var(--panel-3); }
.persona .who { display: flex; justify-content: space-between; gap: 8px; }
.persona .name { font-size: 15px; }
.persona .when { font-size: 11px; color: var(--muted); flex: 0 0 auto; }
.persona .last {
  font-size: 13px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.persona .tag {
  font: 10px/1 var(--mono);
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 2px 4px;
}

#sidebar-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  background: var(--panel-2);
}

/* ── chat ───────────────────────────────────────────────────────────────── */

#chat {
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
  background: var(--chat-bg);
  background-image:
    radial-gradient(var(--chat-tint) 1px, transparent 1px),
    radial-gradient(var(--chat-tint) 1px, transparent 1px);
  background-size: 34px 34px;
  background-position: 0 0, 17px 17px;
}

#ch-name { font-size: 15px; }
#ch-sub { font: 12px/1.3 var(--mono); color: var(--muted); }
#ch-sub.typing { color: var(--wa-teal); }

#placeholder { flex: 1; display: grid; place-items: center; padding: 40px; }
.ph-inner { max-width: 460px; text-align: center; color: var(--muted); }
.ph-mark { font-size: 46px; }
.ph-inner h1 { font-size: 26px; font-weight: 300; color: var(--text); margin: 14px 0 10px; }
.ph-inner p { font-size: 14px; margin: 0 0 12px; }
.ph-note { font-size: 12.5px; border-top: 1px solid var(--line); padding-top: 12px; }

#log {
  flex: 1;
  overflow-y: auto;
  padding: 18px 8%;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* One message. `.row` carries the side; `.bubble` carries the skin. */
.row { display: flex; margin-top: 6px; }
.row.out { justify-content: flex-end; }
.row.tight { margin-top: 1px; }

.bubble {
  position: relative;
  max-width: min(65ch, 78%);
  padding: 6px 9px 8px 9px;
  border-radius: 8px;
  background: var(--bubble-in);
  box-shadow: 0 1px .5px rgba(11, 20, 26, .13);
  overflow-wrap: anywhere;
}
/* Only the body preserves the model's newlines. Putting `pre-wrap` on the whole
 * bubble also preserved the markup's own indentation, which showed up as a stray
 * indent on every first line and as blank rows between reply buttons. */
.bubble .body { white-space: pre-wrap; }
.row.out .bubble { background: var(--bubble-out); }

/* The tail. Only on the first bubble of a run, as WhatsApp does it. */
.row:not(.tight) .bubble::before {
  content: "";
  position: absolute;
  top: 0;
  width: 9px;
  height: 13px;
  background: inherit;
}
.row.in:not(.tight) .bubble::before {
  left: -8px;
  clip-path: polygon(100% 0, 100% 100%, 0 0);
}
.row.out:not(.tight) .bubble::before {
  right: -8px;
  clip-path: polygon(0 0, 100% 0, 0 100%);
}

.bubble .header {
  font-weight: 600;
  font-size: 13.5px;
  color: var(--wa-teal);
  margin-bottom: 3px;
}
.bubble .footer { font-size: 12px; color: var(--muted); margin-top: 4px; }

.meta {
  float: right;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  margin: 6px -2px -4px 10px;
  font-size: 11px;
  color: var(--muted);
  -webkit-user-select: none;
  user-select: none;
}
.tick { font-size: 12px; letter-spacing: -2px; }
.tick.read { color: var(--wa-blue-tick); }

/* Reply buttons, rendered the way the channel renders them.
 *
 * `white-space: normal` matters: the bubble is `pre-wrap` so the body keeps its
 * newlines, and without this override the markup's own indentation between buttons
 * renders as blank lines, tripling each row's height. */
.actions {
  margin: 6px -9px -8px -9px;
  border-top: 1px solid rgba(255,255,255,.09);
  white-space: normal;
}
.actions button {
  display: block;
  width: 100%;
  background: none;
  border: none;
  border-top: 1px solid rgba(255,255,255,.09);
  border-radius: 0;
  color: var(--wa-blue-tick);
  font-size: 14px;
  padding: 9px 6px;
}
.actions button:first-child { border-top: none; }
.actions button:hover { background: rgba(255,255,255,.05); filter: none; }
.actions button[data-cta]::after { content: " ↗"; }

/* Above-bubble annotations: template name, closed window, sanitiser. */
.tags { display: flex; gap: 5px; margin-bottom: 3px; flex-wrap: wrap; }
.row.out .tags { justify-content: flex-end; }

.sys {
  align-self: center;
  margin: 10px 0;
  padding: 6px 12px;
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--muted);
  font-size: 12.5px;
  text-align: center;
  max-width: 80%;
}

#composer { border-top: 1px solid var(--line); background: var(--panel-2); }
.examples { display: flex; gap: 6px; flex-wrap: wrap; padding: 9px 16px 0; }
.examples button { font-size: 11.5px; padding: 5px 9px; border-radius: 999px; }

#send-form { display: flex; gap: 10px; align-items: center; padding: 10px 16px 12px; }
#send-form input { border-radius: 999px; }
button.send {
  flex: 0 0 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--wa-teal);
  border-color: var(--wa-teal);
  color: #05231c;
  font-size: 15px;
}

/* ── dev drawer ─────────────────────────────────────────────────────────── */

#drawer {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
  background: var(--panel);
  border-left: 1px solid var(--line);
}
.drawer-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 14px;
  border-bottom: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--muted);
}
.drawer-controls label { display: flex; align-items: center; gap: 6px; cursor: pointer; }

#trace { flex: 1; overflow-y: auto; padding: 12px 14px; display: flex; flex-direction: column; gap: 8px; }

.ev { border-left: 2px solid var(--line); padding: 2px 0 2px 9px; }
.ev .k {
  font: 10px/1.5 var(--mono);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .06em;
}
.ev pre {
  margin: 2px 0 0;
  font: 11px/1.5 var(--mono);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: #b9c4cc;
  max-height: 15em;
  overflow-y: auto;
}
.ev.ok   { border-left-color: var(--ok); }
.ev.bad  { border-left-color: var(--danger); }
.ev.gate { border-left-color: var(--warn); }
.ev.t3   { border-left-color: var(--danger); }

/* ── payment simulator ─────────────────────────────────────────────────────
 * Lives in the dev drawer because it is scaffolding: it stands in for a real
 * rail's callback so the leave-and-return flow can be driven by hand. It is
 * styled to look like a tool, not like part of the product.
 */
#payments {
  border-top: 1px solid var(--line);
  padding: 10px 14px 14px;
  background: color-mix(in srgb, var(--warn) 7%, transparent);
}
.pay-head {
  font: 600 11px/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
  margin-bottom: 9px;
}
.pay {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  margin-bottom: 8px;
  background: var(--panel);
}
.pay .row { display: flex; align-items: baseline; gap: 8px; }
.pay .amount { font: 600 13px/1.3 var(--mono); color: var(--text); }
.pay .method {
  font: 10px/1 var(--mono);
  text-transform: uppercase;
  padding: 3px 6px;
  border-radius: 4px;
  border: 1px solid var(--line);
  color: var(--muted);
}
.pay .ref { font: 10px/1.4 var(--mono); color: var(--muted); word-break: break-all; }
.pay .acct { font: 11px/1.5 var(--mono); color: var(--muted); margin-top: 4px; }
.pay .acts { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.pay button {
  font: 11px/1 inherit;
  padding: 6px 9px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
}
.pay button.go { background: var(--ok); border-color: var(--ok); color: #06251a; font-weight: 600; }
.pay button.bad { color: var(--err); border-color: color-mix(in srgb, var(--err) 40%, var(--line)); }
.pay a.page { font: 11px/1 var(--mono); color: var(--accent); align-self: center; }