/* WINNING Shipping AI v2.0 - 样式 */

:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --primary-light: #e8f0fe;
  --bg: #f5f7fa;
  --card-bg: #ffffff;
  --text: #1f2937;
  --text-light: #6b7280;
  --border: #e5e7eb;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
  --radius: 12px;
  --max-width: 800px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}

#app {
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: white;
  box-shadow: 0 0 20px rgba(0,0,0,0.05);
}

/* Header */
.header {
  padding: 16px 20px 8px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
}

.logo span {
  font-weight: 400;
  color: var(--text-light);
  font-size: 16px;
}

.version {
  font-size: 11px;
  background: var(--primary-light);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 600;
}

.subtitle {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 2px;
}

/* Module Nav */
.module-nav {
  display: flex;
  gap: 4px;
  padding: 8px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.module-btn {
  flex: 1;
  min-width: 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 12px;
  border: none;
  background: transparent;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-light);
  font-size: 12px;
  transition: all 0.2s;
}

.module-btn .icon { font-size: 20px; }
.module-btn .label { font-size: 11px; font-weight: 500; }

.module-btn:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.module-btn.active {
  background: var(--primary);
  color: white;
}

/* Quick Actions */
.quick-actions {
  display: flex;
  gap: 6px;
  padding: 8px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.quick-btn {
  white-space: nowrap;
  padding: 6px 12px;
  border: 1px solid var(--border);
  background: white;
  border-radius: 16px;
  font-size: 12px;
  cursor: pointer;
  color: var(--text);
  transition: all 0.2s;
  flex-shrink: 0;
}

.quick-btn:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary);
}

/* Chat Area */
.chat-area {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  -webkit-overflow-scrolling: touch;
}

/* Welcome Screen */
.welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  text-align: center;
  flex: 1;
}

.welcome-icon {
  font-size: 64px;
  margin-bottom: 16px;
}

.welcome h2 {
  font-size: 22px;
  color: var(--primary);
  margin-bottom: 4px;
}

.welcome > p {
  color: var(--text-light);
  font-size: 14px;
  margin-bottom: 24px;
}

.welcome-tips {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  max-width: 400px;
  width: 100%;
}

.tip-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 13px;
  color: var(--text-light);
}

.tip-icon { font-size: 18px; }

/* Messages */
.message {
  display: flex;
  gap: 10px;
  max-width: 85%;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.message.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.message.assistant {
  align-self: flex-start;
}

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.message.user .message-avatar {
  background: var(--primary);
  color: white;
}

.message.assistant .message-avatar {
  background: var(--primary-light);
}

.message-content {
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.7;
  word-break: break-word;
}

.message.user .message-content {
  background: var(--primary);
  color: white;
  border-bottom-right-radius: 4px;
}

.message.assistant .message-content {
  background: #f0f2f5;
  border-bottom-left-radius: 4px;
}

.message-content p { margin-bottom: 8px; }
.message-content p:last-child { margin-bottom: 0; }

.message-content ul, .message-content ol {
  margin: 8px 0;
  padding-left: 20px;
}

.message-content li { margin-bottom: 4px; }

.message-content strong {
  font-weight: 600;
}

.message-content code {
  background: rgba(0,0,0,0.06);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 13px;
}

.message-content a {
  color: var(--primary);
  text-decoration: none;
}

.message-content a:hover {
  text-decoration: underline;
}

.message-content blockquote {
  border-left: 3px solid var(--primary);
  padding-left: 10px;
  margin: 8px 0;
  color: var(--text-light);
  font-style: italic;
}

.message-content .image-attachment {
  max-width: 100%;
  border-radius: 8px;
  margin: 8px 0;
}

.message-content .citation {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
  margin: 2px;
}

/* Loading */
.loading {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: #f0f2f5;
  border-radius: 14px;
  align-self: flex-start;
  font-size: 13px;
  color: var(--text-light);
}

.loading.hidden { display: none; }

.dot-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  animation: pulse 1.2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.2); }
}

/* Input area */
.input-area {
  border-top: 1px solid var(--border);
  padding: 8px 16px 12px;
  flex-shrink: 0;
  background: white;
}

.input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px 4px 4px 8px;
  transition: border-color 0.2s;
}

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

.attach-btn {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  padding: 6px;
  border-radius: 50%;
  transition: background 0.2s;
  line-height: 1;
  flex-shrink: 0;
}

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

#messageInput {
  flex: 1;
  border: none;
  background: transparent;
  padding: 8px 4px;
  font-size: 14px;
  resize: none;
  outline: none;
  line-height: 1.5;
  max-height: 120px;
  font-family: inherit;
}

.send-btn {
  background: var(--primary);
  color: white;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: all 0.2s;
  flex-shrink: 0;
}

.send-btn:disabled {
  background: #d1d5db;
  cursor: not-allowed;
}

.send-btn:not(:disabled):hover {
  background: var(--primary-dark);
}

.input-hint {
  text-align: center;
  font-size: 11px;
  color: var(--text-light);
  margin-top: 6px;
}

/* Modal */
.modal {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal.hidden { display: none; }

.modal-content {
  background: white;
  border-radius: var(--radius);
  padding: 20px;
  max-width: 90vw;
  max-height: 90vh;
  position: relative;
  text-align: center;
}

.modal-content img {
  max-width: 100%;
  max-height: 60vh;
  border-radius: 8px;
  margin-bottom: 12px;
}

.modal-close {
  position: absolute;
  top: 8px; right: 12px;
  background: rgba(0,0,0,0.5);
  color: white;
  border: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 14px;
}

.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
}

.btn-primary, .btn-secondary {
  padding: 8px 20px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-secondary {
  background: var(--border);
  color: var(--text);
}

/* Scrollbar */
.chat-area::-webkit-scrollbar {
  width: 4px;
}

.chat-area::-webkit-scrollbar-thumb {
  background: #d1d5db;
  border-radius: 4px;
}

/* Responsive */
@media (max-width: 480px) {
  .header { padding: 12px 16px 6px; }
  .logo { font-size: 18px; }
  .module-nav { padding: 4px 12px; }
  .module-btn { padding: 6px 8px; }
  .quick-actions { padding: 6px 12px; }
  .chat-area { padding: 12px; }
  .message { max-width: 90%; }
  .welcome-tips { grid-template-columns: 1fr; }
  .input-area { padding: 6px 12px 10px; }
}