/*
  IMPORTANT: This application MUST be placed in the /ai folder.
  Server access URL will be ip/ai
  DO NOT change this path structure under any circumstances.
*/
/* 
  Layout Styles: Header, Main Wrapper, Footer
*/

/* 主布局 */
.app-layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* 头部样式 */
.app-header {
  background-image: var(--sjtu-gradient);
  padding: 0 var(--spacing-lg);
  height: 50px;
  display: flex;
  align-items: center;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 1000;
  color: var(--text-on-color);
}

.app-logo {
  width: 32px;
  height: 32px;
  margin-right: var(--spacing-sm);
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.2));
  transition: transform var(--transition-normal);
}
.app-logo:hover { transform: rotate(10deg) scale(1.1); }

.app-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.title-divider {
  width: 1.5px;
  height: 18px;
  background-color: rgba(255, 255, 255, 0.4);
  margin: 0 var(--spacing-md);
  border-radius: 1px;
}

.app-subtitle {
  font-size: 16px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.9);
}

.user-dropdown {
  margin-left: auto;
  background-color: rgba(255, 255, 255, 0.15);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  cursor: pointer;
  transition: background-color var(--transition-normal), transform var(--transition-fast), box-shadow var(--transition-normal);
  font-size: 13px;
  font-weight: 700;
  box-shadow: var(--shadow-xs);
}
.user-dropdown:hover {
  background-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.dropdown-arrow {
  margin-left: var(--spacing-sm);
  transform: rotate(90deg);
  transition: transform var(--transition-normal);
}
.user-dropdown:hover .dropdown-arrow { transform: rotate(90deg) scale(1.1); }

/* TTS Header Button */
.tts-header-button {
  background-color: rgba(255, 255, 255, 0.15);
  border: none;
  padding: 8px 12px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-size: 13px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
  margin-left: auto;
  margin-right: var(--spacing-md);
  box-shadow: var(--shadow-xs);
}

.tts-header-button:hover {
  background-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.tts-header-button:active {
  transform: translateY(0);
  box-shadow: var(--shadow-xs);
}

.tts-header-button.playing {
  background-color: rgba(255, 255, 255, 0.3);
  animation: pulse-tts 1.5s infinite;
}

.tts-header-button.playing #ttsHeaderIcon {
  animation: volume-wave 1s infinite;
}

@keyframes pulse-tts {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.3);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(255, 255, 255, 0);
  }
}

@keyframes volume-wave {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.tts-header-text {
  font-size: 12px;
  font-weight: 600;
}

/* 移动端适配 */
@media (max-width: 768px) {
  .app-header {
    padding: 0 var(--spacing-md);
    height: 48px;
  }
  
  .tts-header-button {
    padding: 6px 10px;
    margin-right: var(--spacing-sm);
  }
  
  .tts-header-text {
    display: none; /* 移动端隐藏文字，只显示图标 */
  }
  
  .user-dropdown {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .app-header {
    padding: 0 var(--spacing-sm);
  }
  
  .app-subtitle {
    font-size: 14px;
  }
  
  .tts-header-button {
    padding: 6px 8px;
    margin-right: 8px;
  }
}

/* 主内容包裹器 & 内容区域 */
.main-wrapper {
  flex: 1;
  padding-top: var(--spacing-xl); /* Keep top padding */
  padding-bottom: var(--spacing-xl); /* Keep bottom padding */
  /* Removed horizontal padding: var(--spacing-md) */
}

.main-content {
  /* max-width: var(--max-content-width); */ /* Removed max-width */
  /* margin: 0 auto; */ /* Removed auto horizontal margins */
  margin-left: 0;
  margin-right: 0;
  width: 100%; /* Ensure it takes full width */
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

/* 页脚 */
.footer {
  background-color: var(--bg-subtle);
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
  font-size: 12px;
  color: var(--text-tertiary);
  border-top: 1px solid var(--border-color);
  margin-top: var(--spacing-2xl);
}

/* Header Link Styles */
.app-header .header-link {
  display: flex; /* Arrange items horizontally */
  align-items: center; /* Vertically center items */
  gap: 10px; /* Add space between logo and text */
  text-decoration: none; /* Remove underline from link */
  color: inherit; /* Inherit text color */
}

.app-header .header-link .app-subtitle {
    margin: 0; /* Reset potential default margins */
}

/* Global body loading opacity effect */
body {
  opacity: 0;
  transition: opacity 0.5s ease-out;
}
body.loaded {
  opacity: 1;
}

/* 添加shake动画用于iOS音频播放失败时的视觉反馈 */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); }
  20%, 40%, 60%, 80% { transform: translateX(4px); }
}

/* iOS音频兼容性提示 */
.ios-audio-hint {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 20px 30px;
  border-radius: 10px;
  z-index: 10000;
  text-align: center;
  font-size: 14px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  animation: fadeInOut 3s ease-in-out;
}

@keyframes fadeInOut {
  0%, 100% { opacity: 0; transform: translate(-50%, -50%) scale(0.8); }
  20%, 80% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}