:root {
  --bg: #0b0d12;
  --surface: #14171f;
  --surface-2: #1c2030;
  --border: #2a2f3d;
  --text: #e6e8ee;
  --text-dim: #8a92a6;
  --accent: #ff8a3d;
  --accent-2: #ffb077;
  --user-bubble: #2a3a5a;
  --assistant-bubble: #1f2433;
  --error-bg: #3a1a1f;
  --error-border: #5a2a30;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.5;
  min-height: 100vh;
}

header {
  max-width: 860px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 1rem;
  text-align: center;
}

header h1 {
  margin: 0 0 0.5rem;
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

header h1 .tag {
  background: var(--accent);
  color: #1a0a00;
  padding: 0.15em 0.5em;
  border-radius: 0.35em;
  font-size: 0.7em;
  vertical-align: middle;
  letter-spacing: 0.05em;
}

.subtitle {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}

main {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 1.25rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
}

.card.error {
  background: var(--error-bg);
  border-color: var(--error-border);
  color: #ffb8b8;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.85rem;
  white-space: pre-wrap;
  word-break: break-word;
}

#auth-panel { text-align: center; }
#auth-panel p { margin-top: 0; }

.hf-btn {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}
.hf-btn img { display: block; height: 44px; }

#signed-in-view { display: flex; align-items: center; justify-content: center; gap: 0.75rem; flex-wrap: wrap; }
#signed-in-view strong { color: var(--accent-2); }
#user-handle { color: var(--text-dim); font-family: ui-monospace, "SF Mono", Menlo, monospace; }

.link-btn {
  background: none;
  border: 0;
  color: var(--text-dim);
  text-decoration: underline;
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0.25rem 0.5rem;
}
.link-btn:hover { color: var(--text); }

#chat-panel { display: flex; flex-direction: column; gap: 1rem; min-height: 60vh; }

#messages {
  flex: 1;
  min-height: 320px;
  max-height: 60vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.msg {
  max-width: 85%;
  padding: 0.75rem 1rem;
  border-radius: 14px;
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-wrap: anywhere;
  font-size: 0.95rem;
}

.msg.user {
  align-self: flex-end;
  background: var(--user-bubble);
  border-bottom-right-radius: 4px;
}

.msg.assistant {
  align-self: flex-start;
  background: var(--assistant-bubble);
  border-bottom-left-radius: 4px;
}

.msg.assistant.streaming::after {
  content: "▍";
  animation: blink 1s steps(1) infinite;
  color: var(--accent);
}

@keyframes blink {
  50% { opacity: 0; }
}

.msg .role {
  display: block;
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.msg pre {
  margin: 0;
  font-family: inherit;
  white-space: pre-wrap;
}

#composer {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

#input {
  width: 100%;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
  font-family: inherit;
  font-size: 0.95rem;
  resize: vertical;
  min-height: 2.5rem;
}

#input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
#input:disabled { opacity: 0.5; }

.composer-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: end;
}

.opt {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}
.opt input {
  width: 5.5rem;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.35rem 0.5rem;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.85rem;
}

.primary {
  margin-left: auto;
  background: var(--accent);
  color: #1a0a00;
  border: 0;
  border-radius: 8px;
  padding: 0.6rem 1.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 120ms;
}
.primary:hover:not(:disabled) { background: var(--accent-2); }
.primary:disabled { opacity: 0.5; cursor: not-allowed; }

footer {
  max-width: 860px;
  margin: 0 auto;
  padding: 1rem 1.25rem 2.5rem;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
}
footer a { color: var(--accent-2); text-decoration: none; }
footer a:hover { text-decoration: underline; }
footer .warning { color: #ffb88a; margin-top: 0.5rem; }