* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #1a1a2e;
  --surface: #16213e;
  --input-bg: #0f3460;
  --user-bg: #1a3a5c;
  --assistant-bg: #2a2a3e;
  --system-bg: #2e1a1a;
  --text: #e0e0e0;
  --text-dim: #8888aa;
  --accent: #4a9eff;
  --green: #4caf50;
  --red: #f44336;
}

html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 800px;
  margin: 0 auto;
}

/* Status bar */
#status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  font-size: 13px;
}

.logo {
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.5px;
}

.dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
}
.dot.green { background: var(--green); }
.dot.red { background: var(--red); }

#conn-status { color: var(--text-dim); font-size: 12px; }

/* Messages */
#messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-wrap: break-word;
  animation: fadeIn 0.2s ease;
}

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

.msg.assistant {
  align-self: flex-start;
  background: var(--assistant-bg);
  border-bottom-left-radius: 4px;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 13px;
}

.msg.system {
  align-self: center;
  background: var(--system-bg);
  color: var(--text-dim);
  font-size: 12px;
  border-radius: 8px;
}

/* Thinking dots */
.thinking .dots span {
  animation: blink 1.4s infinite;
  font-size: 24px;
  line-height: 1;
}
.thinking .dots span:nth-child(2) { animation-delay: 0.2s; }
.thinking .dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes blink {
  0%, 20% { opacity: 0.2; }
  50% { opacity: 1; }
  80%, 100% { opacity: 0.2; }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Input bar */
#input-bar {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  background: var(--surface);
  border-top: 1px solid rgba(255,255,255,0.05);
}

#input {
  flex: 1;
  background: var(--input-bg);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  padding: 10px 14px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  resize: none;
  outline: none;
  transition: border-color 0.2s;
}

#input:focus { border-color: var(--accent); }

#input::placeholder { color: var(--text-dim); }

#send {
  background: var(--accent);
  border: none;
  border-radius: 10px;
  width: 44px;
  color: white;
  font-size: 18px;
  cursor: pointer;
  transition: opacity 0.2s;
}

#send:hover { opacity: 0.85; }
#send:active { opacity: 0.7; }

/* Scrollbar */
#messages::-webkit-scrollbar { width: 6px; }
#messages::-webkit-scrollbar-track { background: transparent; }
#messages::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }

/* Mobile */
@media (max-width: 600px) {
  #app { max-width: 100%; }
  .msg { max-width: 92%; }
}