/* ========== 功法AI助手 - 样式 ========== */

:root {
  --primary: #2D6A4F;
  --primary-light: #52B788;
  --primary-dark: #1B4332;
  --accent: #D4A373;
  --bg: #F8F9FA;
  --card-bg: #FFFFFF;
  --text: #1A202C;
  --text-secondary: #6B7280;
  --border: #E5E7EB;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --radius: 14px;
  --radius-sm: 8px;
  --danger: #E53E3E;
  --warning: #F6AD55;
  --success: #48BB78;
}

* { 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);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ========== Header ========== */
.header {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  color: white;
  padding: 16px 20px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 20px rgba(45,106,79,0.25);
}

.header-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
}

.header-logo .logo-icon {
  width: 38px; height: 38px;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.header-status {
  font-size: 12px;
  background: rgba(255,255,255,0.15);
  padding: 4px 12px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.status-dot {
  width: 8px; height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

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

/* ========== Tabs ========== */
.tabs {
  max-width: 900px;
  margin: 0 auto;
  padding: 16px 20px 0;
  display: flex;
  gap: 8px;
}

.tab {
  flex: 1;
  padding: 12px 16px;
  border: none;
  background: var(--card-bg);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all 0.2s;
  border-bottom: 3px solid transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  background: var(--card-bg);
}

.tab:hover:not(.active) {
  background: rgba(255,255,255,0.5);
}

/* ========== Main Container ========== */
.main {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px 40px;
}

.tab-content {
  display: none;
  background: var(--card-bg);
  border-radius: 0 0 var(--radius) var(--radius);
  box-shadow: var(--shadow);
  min-height: 500px;
}

.tab-content.active {
  display: block;
}

/* ========== Q&A Section ========== */
.qa-container {
  display: flex;
  flex-direction: column;
  height: 600px;
}

.qa-gongfa-selector {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.qa-gongfa-selector::-webkit-scrollbar { height: 4px; }
.qa-gongfa-selector::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.gongfa-chip {
  padding: 6px 14px;
  border-radius: 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  font-size: 13px;
  white-space: nowrap;
  cursor: pointer;
  transition: all 0.2s;
  flex-shrink: 0;
}

.gongfa-chip:hover {
  border-color: var(--primary-light);
}

.gongfa-chip.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.qa-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.qa-messages::-webkit-scrollbar { width: 6px; }
.qa-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.message {
  max-width: 85%;
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.7;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

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

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

.message.bot strong { color: var(--primary-dark); }
.message.bot .warning-box {
  background: #FFF5F5;
  border: 1px solid #FED7D7;
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin: 8px 0;
  color: var(--danger);
  font-size: 13px;
}

.message.bot .source-tag {
  display: inline-block;
  font-size: 11px;
  color: var(--text-secondary);
  background: rgba(0,0,0,0.04);
  padding: 2px 8px;
  border-radius: 10px;
  margin-top: 6px;
}

.typing-indicator {
  align-self: flex-start;
  padding: 12px 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  border-bottom-left-radius: 4px;
  display: flex;
  gap: 4px;
}

.typing-indicator span {
  width: 8px; height: 8px;
  background: var(--text-secondary);
  border-radius: 50%;
  animation: bounce 1.4s infinite;
}

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

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

.qa-input-area {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
}

.qa-input {
  flex: 1;
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: 22px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

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

.qa-send {
  width: 44px; height: 44px;
  border: none;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: all 0.2s;
  flex-shrink: 0;
}

.qa-send:hover {
  background: var(--primary-dark);
  transform: scale(1.05);
}

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

/* Quick questions */
.quick-questions {
  padding: 8px 16px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  border-top: 1px solid var(--border);
}

.quick-questions::-webkit-scrollbar { height: 4px; }

.quick-q {
  padding: 6px 12px;
  background: rgba(45,106,79,0.08);
  border: 1px solid rgba(45,106,79,0.15);
  border-radius: 16px;
  font-size: 12px;
  color: var(--primary);
  white-space: nowrap;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.2s;
}

.quick-q:hover {
  background: rgba(45,106,79,0.15);
}

/* ========== Video Review Section ========== */
.video-container {
  padding: 20px;
}

.video-upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--bg);
}

.video-upload-zone:hover {
  border-color: var(--primary-light);
  background: rgba(82,183,136,0.05);
}

.video-upload-zone.dragover {
  border-color: var(--primary);
  background: rgba(82,183,136,0.1);
}

.upload-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.upload-text {
  font-size: 16px;
  color: var(--text);
  font-weight: 600;
  margin-bottom: 4px;
}

.upload-hint {
  font-size: 13px;
  color: var(--text-secondary);
}

.video-settings {
  margin-top: 16px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.setting-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.setting-select {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  background: white;
  cursor: pointer;
  outline: none;
}

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

.video-preview {
  margin-top: 16px;
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
  display: none;
}

.video-preview video {
  width: 100%;
  display: block;
}

.analysis-result {
  margin-top: 16px;
  display: none;
}

.analysis-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.analysis-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  gap: 8px;
}

.analysis-score {
  font-size: 14px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
}

.score-good { background: rgba(72,187,120,0.15); color: var(--success); }
.score-ok { background: rgba(246,173,85,0.15); color: var(--warning); }
.score-poor { background: rgba(229,62,62,0.15); color: var(--danger); }

.analysis-loading {
  text-align: center;
  padding: 40px 20px;
}

.loading-spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  margin: 0 auto 12px;
  animation: spin 0.8s linear infinite;
}

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

.loading-text {
  font-size: 14px;
  color: var(--text-secondary);
}

.analysis-content {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.review-card {
  background: var(--bg);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  border-left: 4px solid var(--primary-light);
}

.review-card.warning {
  border-left-color: var(--warning);
}

.review-card.danger {
  border-left-color: var(--danger);
}

.review-card-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.review-card-text {
  font-size: 14px;
  color: var(--text);
  line-height: 1.7;
}

.review-card-suggestion {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid var(--border);
}

.review-card-suggestion::before {
  content: "纠正方法：";
  font-weight: 600;
  color: var(--primary);
}

/* ========== Modal ========== */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: white;
  border-radius: var(--radius);
  padding: 24px;
  max-width: 500px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
}

.modal-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--primary-dark);
}

.modal-body {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.modal-close {
  margin-top: 16px;
  width: 100%;
  padding: 12px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

/* ========== Responsive ========== */
@media (max-width: 600px) {
  .header-logo { font-size: 16px; }
  .header-logo .logo-icon { width: 32px; height: 32px; font-size: 18px; }
  .header-status { font-size: 11px; }
  .tab { font-size: 14px; padding: 10px 8px; }
  .video-settings { grid-template-columns: 1fr; }
  .qa-container { height: 500px; }
  .message { max-width: 92%; }
  .header-right { flex-direction: column; align-items: flex-end; gap: 4px; }
  .header-user { font-size: 12px; }
  .header-user .user-btn { font-size: 11px; padding: 3px 8px; }
}

/* ========== 登录页面 ========== */
.login-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.login-box {
  background: white;
  padding: 40px 32px;
  border-radius: 20px;
  width: 90%;
  max-width: 360px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  text-align: center;
}

.login-logo {
  font-size: 48px;
  margin-bottom: 12px;
}

.login-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.login-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.login-input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  margin-bottom: 12px;
  outline: none;
  transition: border-color 0.2s;
}

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

.login-error {
  color: var(--danger);
  font-size: 13px;
  min-height: 18px;
  margin-bottom: 8px;
}

.login-btn {
  width: 100%;
  padding: 13px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.login-btn:active {
  transform: scale(0.98);
}

.login-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.login-hint {
  margin-top: 16px;
  font-size: 12px;
  color: var(--text-secondary);
}

/* ========== Header用户信息 ========== */
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-user {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

.user-btn {
  background: rgba(255,255,255,0.2);
  border: 1px solid rgba(255,255,255,0.3);
  color: white;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
}

.user-btn:hover {
  background: rgba(255,255,255,0.3);
}