/* ember chat: shared by the native server page (www/) and the in-browser
   WebAssembly page (deploy/wasm/web/). Design tokens follow
   johnnyteutonic.github.io: Fraunces headings, Inter body, JetBrains Mono for
   technical text, warm accent, light and dark themes. Plain CSS, no build. */

:root {
  --bg:        #fbfaf8;
  --bg-raised: #ffffff;
  --ink:       #16171a;
  --ink-soft:  #4d5158;
  --ink-muted: #686d75;
  --rule:      #e4e1db;
  --accent:    #7a4b2a;
  --accent-bg: #f2ebe4;
  --on-accent: #ffffff;
  --ok:        #2f7d4f;
  --warn:      #b7791f;
  --danger:    #9c3326;
  --danger-bg: #fbeeec;
  --danger-rule: #efcdc7;
  --shadow:    0 1px 2px rgba(20,20,20,.04), 0 6px 18px rgba(20,20,20,.05);
  --ring:      0 0 0 3px rgba(122,75,42,.18);
  --font-head: "Fraunces", Georgia, serif;
  --font-body: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --measure:   780px;
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg:        #121316;
  --bg-raised: #1a1c20;
  --ink:       #ecebe8;
  --ink-soft:  #b3b7be;
  --ink-muted: #9298a1;
  --rule:      #2c2f35;
  --accent:    #d9a273;
  --accent-bg: #26211c;
  --on-accent: #1a1207;
  --ok:        #6cc28f;
  --warn:      #e0b25c;
  --danger:    #f19a8b;
  --danger-bg: #2a1a18;
  --danger-rule: #4a2a25;
  --shadow:    0 1px 2px rgba(0,0,0,.3), 0 6px 18px rgba(0,0,0,.25);
  --ring:      0 0 0 3px rgba(217,162,115,.22);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --bg:        #121316;
    --bg-raised: #1a1c20;
    --ink:       #ecebe8;
    --ink-soft:  #b3b7be;
    --ink-muted: #9298a1;
    --rule:      #2c2f35;
    --accent:    #d9a273;
    --accent-bg: #26211c;
    --on-accent: #1a1207;
    --ok:        #6cc28f;
    --warn:      #e0b25c;
    --danger:    #f19a8b;
    --danger-bg: #2a1a18;
    --danger-rule: #4a2a25;
    --shadow:    0 1px 2px rgba(0,0,0,.3), 0 6px 18px rgba(0,0,0,.25);
    --ring:      0 0 0 3px rgba(217,162,115,.22);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: none; border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); }
a:hover { border-bottom-color: var(--accent); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

::selection { background: var(--accent); color: var(--on-accent); }

.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;
}

.inner { width: min(var(--measure), 100% - 32px); margin-inline: auto; }

/* ── header ─────────────────────────────── */
.app-head {
  flex: none;
  position: relative;
  border-bottom: 1px solid var(--rule);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
}
.app-head .inner {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 0;
}
.brand { display: flex; align-items: center; gap: 11px; min-width: 0; margin-right: auto; }
.brand-mark {
  flex: none;
  width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--accent-bg); color: var(--accent);
  font-size: 14px; line-height: 1;
}
.brand-text { min-width: 0; }
.brand h1 {
  font-family: var(--font-head);
  font-weight: 600; font-size: 1.2rem; line-height: 1.15;
  letter-spacing: -.01em;
  margin: 0;
}
.model-info {
  position: relative;
  margin: 2px 0 0;
  padding-left: 14px;
  font-family: var(--font-mono);
  font-size: .72rem; line-height: 1.4;
  color: var(--ink-muted);
  overflow-wrap: anywhere;
}
.model-info::before {
  content: "";
  position: absolute; left: 0; top: .42em;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--rule);
}
.model-info[data-state="loading"]::before { background: var(--warn); animation: pulse 1.4s ease-in-out infinite; }
.model-info[data-state="ready"]::before   { background: var(--ok); }
.model-info[data-state="error"]::before   { background: var(--danger); }
.model-info:empty { display: none; }

.theme-toggle {
  flex: none;
  background: none; border: 1px solid var(--rule); color: var(--ink-soft);
  border-radius: 50%; width: 34px; height: 34px; cursor: pointer;
  font-size: .95rem; line-height: 1; display: grid; place-items: center;
  transition: color .15s, border-color .15s;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--ink-muted); }
.theme-toggle:focus-visible { border-radius: 50%; }

.progress {
  position: absolute; left: 0; right: 0; bottom: -1px; height: 2px;
  background: transparent; overflow: hidden;
}
.progress[hidden] { display: none; }
.progress span {
  display: block; height: 100%; width: 0;
  background: var(--accent);
  transition: width .25s ease-out;
}

/* ── conversation ───────────────────────── */
.history {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 22px 0 18px;
  display: flex; flex-direction: column; gap: 16px;
}
.history > * { width: min(var(--measure), 100% - 32px); margin-inline: auto; flex: none; }

.intro {
  background: var(--bg-raised);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 16px 20px 17px;
  box-shadow: var(--shadow);
  margin-bottom: 6px;
}
.intro h2 {
  font-family: var(--font-head);
  font-size: 1.12rem; font-weight: 600; letter-spacing: -.01em; line-height: 1.3;
  margin: 0 0 6px;
}
.intro p { margin: 0; color: var(--ink-soft); font-size: .92rem; }
.facts { list-style: none; padding: 0; margin: 12px 0 0; display: flex; flex-wrap: wrap; gap: 6px; }
.facts li {
  font-family: var(--font-mono);
  font-size: .7rem; letter-spacing: .02em;
  color: var(--accent); background: var(--accent-bg);
  padding: .22rem .6rem; border-radius: 999px; white-space: nowrap;
}

.message { display: flex; align-items: flex-start; gap: 10px; }
.user-message { justify-content: flex-end; }

.avatar {
  flex: none;
  width: 30px; height: 30px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--accent-bg); color: var(--accent);
  font-size: 12px; line-height: 1;
  margin-top: 21px;
}
.msg-body {
  display: flex; flex-direction: column; gap: 4px;
  min-width: 0;
  max-width: min(78%, 560px);
}
.user-message .msg-body { align-items: flex-end; }
.who {
  font-family: var(--font-mono);
  font-size: .7rem; letter-spacing: .04em;
  color: var(--ink-muted);
  padding: 0 4px;
}
.bubble {
  padding: 9px 15px 10px;
  border-radius: 18px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-size: .97rem;
}
.server-message .bubble {
  background: var(--bg-raised);
  border: 1px solid var(--rule);
  border-top-left-radius: 6px;
  box-shadow: var(--shadow);
}
.user-message .bubble {
  background: var(--accent);
  color: var(--on-accent);
  border-top-right-radius: 6px;
}
.error-message .bubble {
  background: var(--danger-bg);
  border-color: var(--danger-rule);
  color: var(--danger);
  box-shadow: none;
}
.timing {
  font-family: var(--font-mono);
  font-size: .68rem; line-height: 1.4;
  color: var(--ink-muted);
  padding: 0 4px;
}
.note { display: block; margin-top: 4px; font-size: .82rem; color: var(--ink-muted); white-space: normal; }

.message.appear { animation: rise .22s ease-out both; }

/* typing indicator */
.typing { display: inline-flex; align-items: center; gap: 5px; height: 1.5em; vertical-align: middle; }
.typing span {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--ink-muted);
  animation: blink 1.2s infinite ease-in-out both;
}
.typing span:nth-child(2) { animation-delay: .16s; }
.typing span:nth-child(3) { animation-delay: .32s; }

/* ── composer ───────────────────────────── */
.composer {
  flex: none;
  border-top: 1px solid var(--rule);
  background: var(--bg);
  padding: 12px 0 10px;
  padding-bottom: max(10px, env(safe-area-inset-bottom));
}
.field {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-raised);
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 5px 5px 5px 18px;
  transition: border-color .15s, box-shadow .15s;
}
.field:focus-within { border-color: var(--accent); box-shadow: var(--ring); }
.field input {
  flex: 1 1 auto; min-width: 0;
  border: 0; outline: 0; background: transparent;
  color: var(--ink);
  font: inherit; font-size: 1rem;
  padding: 7px 0;
}
.field input::placeholder { color: var(--ink-muted); opacity: 1; }
.field button {
  flex: none;
  border: 0; cursor: pointer;
  background: var(--accent); color: var(--on-accent);
  font: inherit; font-size: .9rem; font-weight: 600;
  border-radius: 999px;
  padding: 9px 18px;
  min-width: 72px;
  white-space: nowrap;
  transition: filter .15s, opacity .15s, transform .15s;
}
.field button:hover:not(:disabled) { filter: brightness(1.08); }
.field button:active:not(:disabled) { transform: translateY(1px); }
.field button:focus-visible { outline-offset: 3px; border-radius: 999px; }
.field button:disabled { opacity: .55; cursor: not-allowed; }
.fineprint {
  margin: 8px 0 0; text-align: center;
  font-size: .74rem; color: var(--ink-muted);
}

@keyframes blink {
  0%, 80%, 100% { opacity: .3; transform: translateY(0); }
  40%           { opacity: 1;  transform: translateY(-3px); }
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }
@keyframes rise { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before { animation: none !important; transition: none !important; }
  .typing span { opacity: .7; }
}

/* ── small screens and short iframes ────── */
@media (max-width: 560px) {
  .inner, .history > * { width: calc(100% - 24px); }
  .msg-body { max-width: 86%; }
  .avatar { display: none; }
  .intro { padding: 14px 16px; }
  .intro h2 { font-size: 1.05rem; }
  .brand h1 { font-size: 1.1rem; }
  .brand-mark { width: 30px; height: 30px; font-size: 12px; }
  .model-info {
    font-size: .66rem;
    display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; line-clamp: 2;
    overflow: hidden;
  }
  .fineprint { font-size: .7rem; }
}
@media (max-height: 640px) {
  .app-head .inner { padding: 9px 0; }
  .history { padding-top: 16px; gap: 14px; }
  .composer { padding-top: 10px; }
  .fineprint { margin-top: 6px; }
}