:root {
  --bg: #0b0d12;
  --surface: #12151c;
  --surface-2: #191d27;
  --border: #262b38;
  --text: #e8eaf0;
  --text-dim: #9aa1b2;
  --accent: #6d8dff;
  --accent-2: #8f6dff;
  --user-bubble: #1f2937;
  --assistant-bubble: #151a24;
  --danger: #ff6b6b;
  --radius: 14px;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f6fa;
    --surface: #ffffff;
    --surface-2: #f0f1f6;
    --border: #e2e4ec;
    --text: #16181f;
    --text-dim: #666d80;
    --accent: #4a63e6;
    --accent-2: #7a4ae6;
    --user-bubble: #eceffb;
    --assistant-bubble: #f7f8fb;
    --danger: #d0342c;
    color-scheme: light;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.app {
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 16px 16px;
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.title-block h1 {
  font-size: 1.35rem;
  margin: 0 0 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.title-block p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.85rem;
}

.title-block a {
  color: var(--text-dim);
}

.badges {
  display: flex;
  gap: 6px;
  margin-top: 6px;
  flex-wrap: wrap;
}

.badge {
  font-size: 0.7rem;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
}

.auth-area {
  display: flex;
  align-items: center;
  gap: 10px;
}

#signin-img {
  cursor: pointer;
  height: 38px;
  display: none;
}

.user-chip {
  display: none;
  align-items: center;
  gap: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 10px 4px 4px;
}

.user-chip img {
  width: 26px;
  height: 26px;
  border-radius: 50%;
}

.user-chip span {
  font-size: 0.82rem;
  color: var(--text-dim);
}

.user-chip button {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.78rem;
  text-decoration: underline;
  padding: 0;
}

.gate {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 48px 24px;
}

.gate p {
  color: var(--text-dim);
  max-width: 420px;
  font-size: 0.9rem;
  line-height: 1.5;
}

.gate img {
  cursor: pointer;
  height: 44px;
}

main {
  display: none;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.settings {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
  font-size: 0.78rem;
  color: var(--text-dim);
}

.settings label {
  display: flex;
  align-items: center;
  gap: 6px;
}

.settings input[type="range"] {
  width: 90px;
}

.settings .val {
  min-width: 2.2em;
  display: inline-block;
  color: var(--text);
}

#messages {
  flex: 1;
  overflow-y: auto;
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 12px;
  line-height: 1.5;
  font-size: 0.92rem;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.msg.user {
  align-self: flex-end;
  background: var(--user-bubble);
}

.msg.assistant {
  align-self: flex-start;
  background: var(--assistant-bubble);
  border: 1px solid var(--border);
}

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

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

.msg.error {
  align-self: center;
  color: var(--danger);
  background: transparent;
  border: 1px solid var(--danger);
  font-size: 0.82rem;
}

.examples {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 0 16px 12px;
}

.examples button {
  font-size: 0.78rem;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-dim);
  cursor: pointer;
}

.examples button:hover {
  color: var(--text);
  border-color: var(--accent);
}

form#composer {
  display: flex;
  gap: 10px;
  padding: 14px 16px;
  border-top: 1px solid var(--border);
  align-items: flex-end;
}

#prompt {
  flex: 1;
  resize: none;
  min-height: 44px;
  max-height: 160px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font-family: inherit;
  font-size: 0.92rem;
}

#prompt:focus {
  outline: none;
  border-color: var(--accent);
}

#send, #stop {
  border: none;
  border-radius: 10px;
  padding: 10px 18px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  color: white;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

#stop {
  display: none;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}

#send:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

footer {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.72rem;
  padding: 14px 0 6px;
}

footer a { color: var(--text-dim); }