/* ─── Reset & Base ───────────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-tertiary: #0f3460;
  --accent: #e94560;
  --accent-hover: #c73652;
  --text-primary: #eeeeee;
  --text-muted: #888ba8;
  --text-code: #a8d8ea;
  --border: #2a2a4a;
  --status-green: #4caf50;
  --status-red: #e94560;
  --status-yellow: #ffc107;
  --font-ui: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  --radius: 12px;
  --radius-sm: 6px;
  --shadow: 0 4px 20px rgba(0,0,0,0.4);
}

html, body {
  height: 100%;
  font-family: var(--font-ui);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 15px;
  line-height: 1.5;
  overflow: hidden;
}

/* ─── Hidden utility ─────────────────────────────────────────────────────── */
.hidden { display: none !important; }

/* ─── Setup Screen ───────────────────────────────────────────────────────── */
.setup-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  padding: 20px;
  background: var(--bg-primary);
}

.setup-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  width: 100%;
  max-width: 460px;
  box-shadow: var(--shadow);
}

.setup-card h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}

.setup-card > p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.form-group input {
  width: 100%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 10px 12px;
  font-size: 0.95rem;
  font-family: var(--font-ui);
  transition: border-color 0.2s;
  outline: none;
}

.form-group input:focus {
  border-color: var(--accent);
}

.form-group input::placeholder {
  color: var(--text-muted);
  opacity: 0.6;
}

.btn-primary {
  width: 100%;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
  transition: background 0.2s;
}

.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:active { transform: scale(0.98); }

.setup-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 14px;
  text-align: center;
}

.setup-hint code {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: var(--bg-tertiary);
  padding: 2px 5px;
  border-radius: 3px;
  color: var(--text-code);
}

/* ─── Chat Screen ────────────────────────────────────────────────────────── */
.chat-screen {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 800px;
  margin: 0 auto;
  background: var(--bg-primary);
}

/* Header */
.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  gap: 12px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.app-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.02em;
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
  transition: background 0.3s;
}

.status-dot.connected    { background: var(--status-green); box-shadow: 0 0 6px var(--status-green); }
.status-dot.disconnected { background: var(--status-red); }
.status-dot.connecting   { background: var(--status-yellow); animation: pulse 1.2s infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

.status-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.pwd-display {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn-icon {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  width: 32px;
  height: 32px;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, border-color 0.2s;
}

.btn-icon:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
}

/* Messages */
.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  scroll-behavior: smooth;
}

.messages-container::-webkit-scrollbar { width: 5px; }
.messages-container::-webkit-scrollbar-track { background: transparent; }
.messages-container::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.welcome-msg {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.88rem;
  font-style: italic;
  padding: 24px 0;
}

/* Message bubbles */
.message {
  display: flex;
  flex-direction: column;
  max-width: 88%;
}

.message.user {
  align-self: flex-end;
  align-items: flex-end;
}

.message.assistant,
.message.system,
.message.error {
  align-self: flex-start;
  align-items: flex-start;
}

.message-bubble {
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 0.93rem;
  line-height: 1.55;
  word-break: break-word;
  position: relative;
}

.message.user .message-bubble {
  background: var(--accent);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.message.assistant .message-bubble {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
  max-width: 100%;
}

.message.system .message-bubble {
  background: transparent;
  color: var(--text-muted);
  font-style: italic;
  font-size: 0.82rem;
  text-align: center;
  padding: 4px 10px;
  border: none;
  align-self: center;
}

.message.error .message-bubble {
  background: rgba(233, 69, 96, 0.12);
  color: var(--accent);
  border: 1px solid rgba(233, 69, 96, 0.3);
  border-bottom-left-radius: 4px;
  font-size: 0.88rem;
}

.message-time {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 3px;
  padding: 0 4px;
}

/* Markdown inside assistant bubbles */
.message.assistant .message-bubble p { margin-bottom: 0.6em; }
.message.assistant .message-bubble p:last-child { margin-bottom: 0; }
.message.assistant .message-bubble ul,
.message.assistant .message-bubble ol { padding-left: 1.4em; margin-bottom: 0.6em; }
.message.assistant .message-bubble li { margin-bottom: 0.25em; }
.message.assistant .message-bubble h1,
.message.assistant .message-bubble h2,
.message.assistant .message-bubble h3 {
  margin: 0.8em 0 0.4em;
  color: var(--accent);
}
.message.assistant .message-bubble h1 { font-size: 1.2em; }
.message.assistant .message-bubble h2 { font-size: 1.05em; }
.message.assistant .message-bubble h3 { font-size: 0.95em; }
.message.assistant .message-bubble blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 10px;
  color: var(--text-muted);
  margin: 0.5em 0;
}
.message.assistant .message-bubble a {
  color: var(--accent);
  text-decoration: underline;
}
.message.assistant .message-bubble strong { color: #fff; }
.message.assistant .message-bubble em { color: #c5c8e0; }

/* Inline code */
.message.assistant .message-bubble code:not([class]) {
  background: var(--bg-tertiary);
  color: var(--text-code);
  padding: 2px 5px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
}

/* Code blocks */
.message.assistant .message-bubble pre {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  margin: 0.6em 0;
  overflow-x: auto;
  position: relative;
}

.message.assistant .message-bubble pre code {
  font-family: var(--font-mono);
  font-size: 0.82em;
  background: transparent;
  padding: 0;
  border-radius: 0;
  color: inherit;
}

/* Copy button on code blocks */
.code-copy-btn {
  position: absolute;
  top: 6px;
  right: 6px;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 4px;
  padding: 3px 8px;
  font-size: 0.72rem;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  font-family: var(--font-ui);
}

.code-copy-btn:hover {
  background: rgba(255,255,255,0.15);
  color: var(--text-primary);
}

.code-copy-btn.copied {
  color: var(--status-green);
  border-color: var(--status-green);
}

/* Typing indicator */
.typing-indicator {
  display: flex;
  gap: 5px;
  align-items: center;
  padding: 10px 14px;
}

.typing-indicator span {
  width: 7px;
  height: 7px;
  background: var(--text-muted);
  border-radius: 50%;
  animation: bounce 1.2s infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.15s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.30s; }

@keyframes bounce {
  0%, 60%, 100% { transform: translateY(0); }
  30%            { transform: translateY(-6px); }
}

/* Input Area */
.input-area {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 10px 12px 12px;
  flex-shrink: 0;
}

.toolbar {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.btn-tool {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 5px 10px;
  font-size: 0.78rem;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}

.btn-tool:hover {
  background: var(--border);
  color: var(--text-primary);
}

.btn-tool:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.input-row {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

#prompt-input {
  flex: 1;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 10px 12px;
  font-size: 0.95rem;
  font-family: var(--font-ui);
  resize: none;
  outline: none;
  line-height: 1.5;
  max-height: 120px; /* ~5 lines */
  overflow-y: auto;
  transition: border-color 0.2s;
}

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

#prompt-input::placeholder {
  color: var(--text-muted);
  opacity: 0.6;
}

.btn-send {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  width: 42px;
  height: 42px;
  font-size: 1.1rem;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, transform 0.1s;
}

.btn-send:hover { background: var(--accent-hover); }
.btn-send:active { transform: scale(0.95); }
.btn-send:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

/* ─── Desktop adjustments ────────────────────────────────────────────────── */
@media (min-width: 800px) {
  .chat-screen {
    border-left: 1px solid var(--border);
    border-right: 1px solid var(--border);
  }

  .pwd-display { max-width: 320px; }
}