/* ========================================
   Chat Agentico — CSS
   Zero deps, iframe-friendly, responsive
   ======================================== */

:root {
  --primary: #6366f1;
  --primary-light: #818cf8;
  --bg: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-chat: #151525;
  --text: #e5e7eb;
  --text-secondary: #9ca3af;
  --border: #2d2d44;
  --card-bg: #1e1e32;
  --card-border: #2d2d44;
  --success: #22c55e;
  --error: #ef4444;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow: 0 2px 8px rgba(0,0,0,0.3);
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
}

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

html, body {
  height: 100%;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* Chat root — fills entire viewport / iframe */
#chat-root {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-height: 100vh;
  overflow: hidden;
}

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

.chat-header-title {
  font-weight: 600;
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.dark-badge {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 4px;
}

.chat-header-right {
  display: flex;
  align-items: center;
  gap: 4px;
}

.mcp-select {
  padding: 6px 28px 6px 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  outline: none;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%239ca3af' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  max-width: 200px;
}

.mcp-select:focus {
  border-color: var(--primary);
}

.remove-mcp-btn {
  width: 28px;
  height: 28px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.remove-mcp-btn:hover {
  color: var(--error);
  border-color: var(--error);
}

/* Messages area */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  background: var(--bg-chat);
  display: flex;
  flex-direction: column;
  gap: 12px;
  scroll-behavior: smooth;
}

/* Message bubble */
.message {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: var(--radius);
  word-wrap: break-word;
  white-space: pre-wrap;
  animation: fadeIn 0.15s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.message-user {
  align-self: flex-end;
  background: var(--primary);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.message-assistant {
  align-self: flex-start;
  background: var(--bg);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
  box-shadow: var(--shadow-sm);
}

.message-assistant .message-text {
  min-height: 1.5em;
}

.message-assistant .message-text a {
  color: var(--primary);
  text-decoration: underline;
}

/* Execution cards */
.exec-card {
  margin: 8px 0;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  overflow: hidden;
  font-size: 14px;
}

.exec-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  cursor: pointer;
  user-select: none;
}

.exec-card-header:hover {
  background: var(--border);
}

.exec-card-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.exec-card-icon.pending {
  color: var(--primary);
}

.exec-card-icon.success {
  color: var(--success);
}

.exec-card-icon.error {
  color: var(--error);
}

/* Spinner */
.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.exec-card-summary {
  flex: 1;
  font-size: 13px;
}

.exec-card-chevron {
  flex-shrink: 0;
  color: var(--text-secondary);
  transition: transform 0.15s;
  font-size: 12px;
}

.exec-card.expanded .exec-card-chevron {
  transform: rotate(90deg);
}

.exec-card-detail {
  display: none;
  padding: 8px 12px;
  border-top: 1px solid var(--card-border);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  max-height: 200px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

.exec-card.expanded .exec-card-detail {
  display: block;
}

/* Working indicator */
.working-indicator {
  align-self: flex-start;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  color: var(--text-secondary);
  font-size: 14px;
  animation: fadeIn 0.15s ease-out;
}

.working-dots {
  display: flex;
  gap: 4px;
}

.working-dots span {
  width: 6px;
  height: 6px;
  background: var(--text-secondary);
  border-radius: 50%;
  animation: bounce 1.2s infinite;
}

.working-dots span:nth-child(2) { animation-delay: 0.2s; }
.working-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes bounce {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-4px); }
}

/* Input area */
.chat-input-area {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  background: var(--bg);
  flex-shrink: 0;
}

.chat-form {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}

.chat-input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-secondary);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  resize: none;
  outline: none;
  max-height: 120px;
  transition: border-color 0.15s;
}

.chat-input:focus {
  border-color: var(--primary);
}

.chat-input::placeholder {
  color: var(--text-secondary);
}

.chat-send-btn,
.chat-cancel-btn {
  width: 40px;
  height: 40px;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.15s, opacity 0.15s;
}

.chat-send-btn {
  background: var(--primary);
  color: #fff;
}

.chat-send-btn:hover {
  background: var(--primary-light);
}

.chat-send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.chat-cancel-btn {
  background: var(--error);
  color: #fff;
}

.chat-cancel-btn:hover {
  opacity: 0.85;
}

/* Utility */
.hidden {
  display: none !important;
}

/* Error banner */
.error-banner {
  padding: 10px 14px;
  background: #2d1b1b;
  border: 1px solid #5c2020;
  border-radius: var(--radius-sm);
  color: var(--error);
  font-size: 14px;
  align-self: stretch;
}

/* Responsive */
@media (max-width: 480px) {
  .chat-messages {
    padding: 12px;
  }

  .message {
    max-width: 92%;
  }

  .chat-input-area {
    padding: 8px 12px;
  }
}