:root {
  --bg: #0f1117;
  --panel: #171a24;
  --border: #2a2f3d;
  --text: #e6e8ee;
  --muted: #9aa0ac;
  --accent: #4f8cff;
  --user-bubble: #22314f;
  --gpt-bubble: #1c2030;
  --offscope: #4a2020;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  padding: 20px 24px 10px;
  border-bottom: 1px solid var(--border);
}

header h1 { margin: 0 0 6px; font-size: 20px; }

.subtitle { color: var(--muted); font-size: 13px; margin: 0; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--panel);
  border: 1px solid var(--border);
  font-size: 11px;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: 16px 24px;
  gap: 12px;
}

#chat-log {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-bottom: 12px;
  min-height: 300px;
}

.msg {
  padding: 10px 14px;
  border-radius: 10px;
  max-width: 85%;
  white-space: pre-wrap;
  line-height: 1.45;
  font-size: 14px;
}

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

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

.msg.offscope {
  align-self: flex-start;
  background: var(--offscope);
  border: 1px solid #6b2b2b;
}

.msg.pending {
  align-self: flex-start;
  background: var(--gpt-bubble);
  border: 1px dashed var(--border);
  color: var(--muted);
  font-style: italic;
}

.msg .role {

  display: block;
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.msg pre {
  background: #0b0d13;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  overflow-x: auto;
  position: relative;
}

.msg .copy-btn {
  position: absolute;
  top: 6px;
  right: 6px;
  font-size: 11px;
  padding: 2px 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  cursor: pointer;
}

form#chat-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

textarea {
  width: 100%;
  resize: vertical;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
}

.actions { display: flex; gap: 8px; }

button {
  cursor: pointer;
  border: none;
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 14px;
}

#send-btn {
  background: var(--accent);
  color: white;
}

#send-btn:disabled { opacity: 0.6; cursor: default; }

#clear-btn {
  background: var(--panel);
  color: var(--muted);
  border: 1px solid var(--border);
}

footer {
  text-align: center;
  padding: 10px;
  color: var(--muted);
  border-top: 1px solid var(--border);
}