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

body {
  font-family: monospace;
  background: #1a1a2e;
  color: #e0e0e0;
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* ── Header ── */

header {
  padding: 12px 20px;
  border-bottom: 1px solid #333;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

header h1 {
  color: #7c83ff;
  font-size: 1.2em;
}

select {
  font-family: monospace;
  padding: 6px 10px;
  border: 1px solid #333;
  border-radius: 4px;
  background: #16213e;
  color: #e0e0e0;
}

.clear-btn {
  padding: 6px 10px;
  background: #333;
  color: #aaa;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-family: monospace;
  font-size: 0.85em;
}

.clear-btn:hover { background: #444; }

.system-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.system-toggle label {
  font-size: 0.85em;
  color: #888;
  cursor: pointer;
}

#systemPrompt {
  display: none;
  width: calc(100% - 40px);
  font-family: monospace;
  padding: 8px;
  border: 1px solid #333;
  border-radius: 4px;
  background: #0a0a1a;
  color: #e0e0e0;
  resize: vertical;
  font-size: 12px;
  min-height: 40px;
  margin: 8px 20px 0;
}

#systemPrompt.visible { display: block; }

/* ── Meta Bar ── */

.meta-bar {
  padding: 4px 20px;
  background: #0a0a1a;
  border-bottom: 1px solid #222;
  font-size: 0.8em;
  color: #666;
  flex-shrink: 0;
  min-height: 24px;
}

/* ── Chat ── */

#chat {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 8px;
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.5;
}

.msg.user {
  align-self: flex-end;
  background: #16213e;
  border: 1px solid #333;
}

.msg.assistant {
  align-self: flex-start;
  background: #0f3460;
  border: 1px solid #1a4a7a;
}

.msg.system-info {
  align-self: center;
  background: #1a1a2e;
  border: 1px solid #333;
  color: #888;
  font-size: 0.85em;
  text-align: center;
  max-width: 95%;
}

/* ── Cursor ── */

.msg .cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: #7c83ff;
  animation: blink 0.8s infinite;
  vertical-align: text-bottom;
  margin-left: 1px;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* ── Tool Boxes ── */

.tool-box {
  align-self: center;
  max-width: 95%;
  padding: 8px 12px;
  border-radius: 6px;
  background: #0a1e3d;
  border: 1px solid #1a3a5c;
  font-size: 0.85em;
}

.tool-name { color: #7c83ff; font-weight: bold; }
.tool-input { color: #888; margin-left: 6px; font-size: 0.85em; }
.tool-result { color: #6bff8a; font-size: 0.8em; margin-top: 4px; max-height: 100px; overflow-y: auto; }
.tool-error { color: #ff6b6b; }
.tool-spinner { color: #7c83ff; }

/* ── Input Area ── */

.input-area {
  padding: 12px 20px;
  border-top: 1px solid #333;
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.input-area textarea {
  flex: 1;
  font-family: monospace;
  padding: 10px;
  border: 1px solid #333;
  border-radius: 4px;
  background: #0f3460;
  color: #e0e0e0;
  resize: none;
  font-size: 14px;
  min-height: 60px;
  max-height: 150px;
}

.input-area button {
  padding: 10px 20px;
  background: #7c83ff;
  color: #fff;
  border: none;
  border-radius: 4px;
  font-family: monospace;
  font-weight: bold;
  cursor: pointer;
  align-self: flex-end;
}

.input-area button:hover { background: #5a63e0; }
.input-area button:disabled { opacity: 0.5; cursor: not-allowed; }