/**
 * Apple Music Style Lyrics Card Generator
 * 主样式文件
 */

:root {
  --radius: 22px;
  --color-bg: #000000;
  --color-surface: #1c1c1e;
  --color-surface-tertiary: #3a3a3c;
  --color-text-primary: #ffffff;
  --color-text-secondary: rgba(255, 255, 255, 0.7);
  --color-text-tertiary: rgba(255, 255, 255, 0.55);
  --color-accent: #007aff;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  --radius-lg: 12px;
  --transition-fast: 0.08s ease;
  --transition-slow: 0.25s ease;
  --transition-standard: 0.2s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--color-bg);
  color: var(--color-text-primary);
  overflow: hidden; /* 桌面端隐藏溢出 */
}

.app-container {
  display: grid;
  grid-template-columns: 400px 1fr;
  height: 100vh;
  background: var(--color-bg);
}

/* Input Panel - Fixed Layout */
.input-panel {
  background: var(--color-surface);
  border-right: 1px solid var(--color-surface-tertiary);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.panel-header {
  padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-lg);
  flex-shrink: 0;
}

.app-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

.app-subtitle {
  font-size: 14px;
  color: var(--color-text-tertiary);
  margin: 0;
}

.input-sections {
  flex: 1;
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
  overflow-y: auto;
  overflow-x: hidden;
}
.input-section { display: flex; flex-direction: column; gap: var(--spacing-md); }
.section-label { font-size: 16px; font-weight: 600; }
.song-inputs { display: grid; gap: var(--spacing-md); }

.lyrics-textarea, .text-input {
  width: 100%;
  padding: var(--spacing-md);
  background: var(--color-surface);
  border: 1px solid var(--color-surface-tertiary);
  border-radius: var(--radius-lg);
  color: var(--color-text-primary);
  font-size: 16px;
  font-family: inherit;
}

.lyrics-textarea { min-height: 120px; }

.cover-upload { position: relative; }
.cover-file-input { position: absolute; opacity: 0; pointer-events: none; }
.cover-upload-area {
  border: 2px dashed var(--color-surface-tertiary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  cursor: pointer;
  background: var(--color-surface);
}
.cover-upload-content { display: flex; flex-direction: column; align-items: center; gap: var(--spacing-sm); }
.upload-text { font-weight: 500; color: var(--color-text-secondary); }
.upload-hint { font-size: 14px; color: var(--color-text-tertiary); }

.panel-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--color-surface-tertiary);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  flex-shrink: 0;
}

.export-btn, .share-btn {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-accent);
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.share-btn {
  background: var(--color-surface-tertiary);
  color: var(--color-text-primary);
}

/* 作者信息区域 */
.author-info {
  padding: var(--spacing-sm) var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(0, 0, 0, 0.2);
}

.author-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
}

.author-link {
  display: flex;
  align-items: center;
  gap: 4px;
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  transition: color var(--transition-standard);
  font-weight: 400;
  padding: 2px 4px;
  border-radius: 4px;
}

.author-link:hover {
  color: rgba(255, 255, 255, 0.8);
  background: rgba(255, 255, 255, 0.05);
}

.author-link svg {
  flex-shrink: 0;
  opacity: 0.6;
  transition: opacity var(--transition-standard);
}

.author-link:hover svg {
  opacity: 0.9;
}

.divider {
  color: rgba(255, 255, 255, 0.2);
  font-weight: 300;
  margin: 0 2px;
}

/* Preview Panel */
.preview-panel {
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xxl);
  position: relative;
}

.preview-container {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

.preview-label {
  position: absolute;
  top: var(--spacing-lg);
  left: var(--spacing-lg);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  z-index: 1;
}

/* CARD - 参考样式优化的内部布局 */
.card {
  width: var(--card-width, auto);
  min-width: 270px;
  max-width: 500px;
  min-height: 270px; /* 最小高度替代固定aspect-ratio */
  border-radius: var(--radius);
  overflow: hidden;
  color: #fff;
  position: relative;

  /* 内部布局 - 关键修复 */
  display: flex;
  flex-direction: column;
  justify-content: space-between;

  /* Layer A: 动态基色渐变 */
  --g-linear: linear-gradient(-45deg, rgb(40,90,180), rgb(80,140,220), rgb(20,60,120), rgb(100,160,200));
  --g-radial: radial-gradient(ellipse at 30% 20%, rgba(80,140,220,0.8), transparent 70%);

  /* 主背景 */
  background: var(--g-linear);
  background-size: 400% 400%;

  /* 渐变颜色变化的快速过渡动画 */
  transition: background var(--transition-fast);

  /* 主动画 */
  animation:
    primaryGradient 28s ease-in-out infinite,
    hueShift 24s ease-in-out infinite;

  /* 阴影效果 */
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);

  /* 添加微妙的呼吸感过渡效果 */
  transition:
    transform var(--transition-slow),
    box-shadow var(--transition-slow);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow:
    0 25px 50px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.1);
  animation:
    primaryGradient 28s ease-in-out infinite,
    hueShift 24s ease-in-out infinite,
    cardBreathe 4s ease-in-out infinite;
}

.card:hover::before {
  animation:
    overlayMotion 28s ease-in-out infinite,
    grainMotion 7s ease-in-out infinite;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    /* Layer D: 柔光叠加 */
    linear-gradient(135deg, rgba(255,255,255,0.03) 0%, transparent 40%, rgba(0,0,0,0.02) 100%),
    /* Layer C: 可读性遮罩 */
    linear-gradient(to bottom, rgba(0,0,0,0.15) 0%, rgba(0,0,0,0.05) 30%, rgba(0,0,0,0.05) 70%, rgba(0,0,0,0.25) 100%),
    /* Layer B: 质感颗粒层 */
    radial-gradient(circle at 20% 50%, rgba(255,255,255,0.02) 0%, transparent 50%),
    /* Layer A: 辅助径向渐变 */
    var(--g-radial);
  pointer-events: none;
  background-size:
    100% 100%,
    100% 100%,
    150% 150%,
    250% 250%;
}

/* LYRICS - 参考样式优化 */
.card .lyrics {
  padding: 22px 22px 18px 22px;
  font-size: 22px;
  font-weight: 800;
  line-height: 1.35;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
  position: relative;
  z-index: 2;
  flex: 1; /* 允许歌词区域扩展 */
  display: flex;
  align-items: center; /* 垂直居中对齐 */
  word-wrap: break-word;
  overflow-wrap: break-word;
}

/* INFOBAR - 参考样式优化 */
.card .infobar {
  display: grid;
  grid-template-columns: 1fr auto;
  padding: 12px 18px 14px 18px;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.16), rgba(0, 0, 0, 0.22));
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  position: relative;
  z-index: 2;
}

.card .left {
  display: flex;
  flex-direction: column;
  gap: 10px;
  /* 给右侧封面预留空间，防止文字被遮挡 */
  margin-right: 70px;
}

.card .titleArtist {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.card .song {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.card .artist {
  font-size: 14px;
  opacity: 0.9;
}

.card .album {
  font-size: 14px;
  opacity: 0.85;
  padding-top: 2px;
}

.card .brand {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #eaeaea;
  opacity: 0.85;
}

.card .brand span {
  font-weight: 500;
  letter-spacing: 0.15px;
}

/* Corner Album Cover */
.corner-album-cover {
  position: absolute;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  z-index: 3;
  box-shadow:
    0 4px 16px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
  transition: all var(--transition-standard);
  cursor: pointer;
}

.corner-album-cover:hover {
  transform: scale(1.03);
  box-shadow:
    0 8px 24px rgba(0, 0, 0, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.corner-album-cover .cover-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.6);
  background: linear-gradient(135deg,
    rgba(255, 255, 255, 0.15),
    rgba(255, 255, 255, 0.05));
  backdrop-filter: blur(10px);
}

.corner-album-cover .cover-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: none;
}

/* 完整动画系统 */
@keyframes primaryGradient {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes hueShift {
  0%, 100% { filter: hue-rotate(0deg); }
  33% { filter: hue-rotate(15deg); }
  66% { filter: hue-rotate(-15deg); }
}

@keyframes cardBreathe {
  0%, 100% { transform: translateY(-8px) scale(1); }
  50% { transform: translateY(-8px) scale(1.02); }
}

@keyframes overlayMotion {
  0%, 100% { background-position: 0% 0%, 0% 0%, 0% 0%, 0% 0%; }
  25% { background-position: 20% 10%, 0% 0%, 30% 20%, 40% 30%; }
  50% { background-position: 40% 20%, 0% 0%, 60% 40%, 80% 60%; }
  75% { background-position: 20% 10%, 0% 0%, 30% 20%, 40% 30%; }
}

@keyframes grainMotion {
  0%, 100% { opacity: 0.02; }
  50% { opacity: 0.05; }
}

/* Apple风格通知系统 */
.notification-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  pointer-events: none;
}

.notification {
  background: rgba(28, 28, 30, 0.95);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--color-text-primary);
  font-size: 14px;
  font-weight: 500;
  max-width: 320px;
  min-width: 240px;
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.4),
    0 1px 0 rgba(255, 255, 255, 0.1) inset;

  transform: translateX(100%);
  opacity: 0;
  transition: all var(--transition-standard);
  pointer-events: auto;
  cursor: pointer;

  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.notification.show {
  transform: translateX(0);
  opacity: 1;
}

.notification.success {
  border-left: 3px solid #34c759;
}

.notification.error {
  border-left: 3px solid #ff3b30;
}

.notification.info {
  border-left: 3px solid var(--color-accent);
}

.notification-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 1px;
}

.notification-content {
  flex: 1;
  line-height: 1.4;
}

.notification-title {
  font-weight: 600;
  margin-bottom: 2px;
}

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

.notification-close {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  background: none;
  border: none;
  color: var(--color-text-tertiary);
  cursor: pointer;
  padding: 0;
  margin-top: 2px;
  transition: color var(--transition-fast);
}

.notification-close:hover {
  color: var(--color-text-primary);
}

/* 通知动画 */
@keyframes notificationSlideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes notificationSlideOut {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

/* ===== 移动端响应式设计 ===== */
@media (max-width: 768px) {
  /* 修复body overflow问题 */
  body {
    overflow: auto !important;
  }

  /* 移动端布局：简单的垂直排列 */
  .app-container {
    display: flex !important;
    flex-direction: column !important;
    grid-template-columns: none !important;
    height: auto !important;
    min-height: 100vh !important;
  }

  /* 1. Preview区域在最顶部 */
  .preview-panel {
    order: 1 !important;
    display: flex !important;
    flex-direction: column !important;
    padding: var(--spacing-lg) !important;
    min-height: 320px !important;
    width: 100% !important;
    background: var(--color-bg) !important;
    border-bottom: 1px solid var(--color-surface-tertiary) !important;
    border-right: none !important;
  }

  /* 2. 输入面板在下方（包含标题和配置） */
  .input-panel {
    order: 2 !important;
    display: flex !important;
    flex-direction: column !important;
    width: 100% !important;
    height: auto !important;
    border-right: none !important;
    overflow: visible !important;
  }

  /* 标题栏样式 */
  .panel-header {
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md) !important;
    background: var(--color-surface) !important;
    border-bottom: 1px solid var(--color-surface-tertiary) !important;
  }

  .app-title {
    font-size: 24px !important;
  }

  /* 输入区域 */
  .input-sections {
    padding: var(--spacing-md) !important;
    gap: var(--spacing-lg) !important;
    overflow: visible !important;
  }

  /* 作者信息移动端样式 */
  .author-info {
    padding: var(--spacing-xs) var(--spacing-md) !important;
    border-top: 1px solid rgba(255, 255, 255, 0.06) !important;
    margin-bottom: 100px !important; /* 为底部按钮预留空间 */
    background: rgba(0, 0, 0, 0.15) !important;
  }

  .author-links {
    font-size: 11px !important;
    gap: 6px !important;
    color: rgba(255, 255, 255, 0.35) !important;
  }

  .author-link {
    gap: 3px !important;
    color: rgba(255, 255, 255, 0.45) !important;
    padding: 1px 3px !important;
  }

  .author-link:hover {
    color: rgba(255, 255, 255, 0.7) !important;
  }

  /* 移动端卡片优化 */
  .card {
    max-width: 280px !important;
    min-width: 240px !important;
    width: 85vw !important;
    margin: 0 auto !important;
  }

  /* 预览标签隐藏 */
  .preview-label {
    display: none !important;
  }

  /* 预览容器居中 */
  .preview-container {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 100% !important;
    height: 100% !important;
    min-height: 300px !important;
  }

  /* 底部按钮固定 */
  .panel-footer {
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    background: rgba(28, 28, 30, 0.95) !important;
    border-top: 1px solid var(--color-surface-tertiary) !important;
    padding: var(--spacing-md) !important;
    padding-bottom: calc(var(--spacing-md) + env(safe-area-inset-bottom)) !important;
    z-index: 1000 !important;
    backdrop-filter: blur(20px) !important;
    -webkit-backdrop-filter: blur(20px) !important;
  }

  /* 按钮样式 */
  .export-btn, .share-btn {
    padding: var(--spacing-md) !important;
    font-size: 15px !important;
    border-radius: 10px !important;
  }

  /* 通知系统适配 */
  .notification-container {
    top: var(--spacing-md) !important;
    right: var(--spacing-md) !important;
    left: var(--spacing-md) !important;
  }

  .notification {
    max-width: none !important;
    width: 100% !important;
  }

  /* 输入框优化 */
  .lyrics-textarea {
    min-height: 100px !important;
    font-size: 16px !important;
  }

  .text-input {
    font-size: 16px !important;
  }

  .cover-upload-area {
    padding: var(--spacing-lg) !important;
  }

  /* 横屏适配 */
  @media (orientation: landscape) and (max-height: 500px) {
    .preview-panel {
      min-height: 200px !important;
    }

    .card {
      max-width: 200px !important;
      min-width: 180px !important;
    }
  }
}

/* 超小屏幕设备优化 */
@media (max-width: 480px) {
  .panel-header {
    padding: var(--spacing-md) !important;
  }

  .app-title {
    font-size: 20px !important;
  }

  .input-sections {
    gap: var(--spacing-md) !important;
  }

  .card {
    max-width: 260px !important;
    min-width: 220px !important;
    width: 90vw !important;
  }

  .panel-footer {
    padding: var(--spacing-sm) var(--spacing-md) !important;
    padding-bottom: calc(var(--spacing-sm) + env(safe-area-inset-bottom)) !important;
  }

  .export-btn, .share-btn {
    font-size: 14px !important;
    gap: var(--spacing-xs) !important;
  }
}

/* 强制修复作者信息样式 - 防止被其他规则覆盖 */
.input-panel .author-info {
  padding: var(--spacing-sm) var(--spacing-lg) !important;
  border-top: 1px solid rgba(255, 255, 255, 0.08) !important;
  display: flex !important;
  justify-content: center !important;
  align-items: center !important;
  background: rgba(0, 0, 0, 0.3) !important;
}

.input-panel .author-links {
  display: flex !important;
  align-items: center !important;
  gap: var(--spacing-sm) !important;
  font-size: 12px !important;
  color: rgba(255, 255, 255, 0.45) !important;
}

.input-panel .author-link {
  display: flex !important;
  align-items: center !important;
  gap: 4px !important;
  color: rgba(255, 255, 255, 0.55) !important;
  text-decoration: none !important;
  transition: all 0.2s ease !important;
  font-weight: 400 !important;
  padding: 3px 6px !important;
  border-radius: 4px !important;
  background: transparent !important;
}

.input-panel .author-link:hover {
  color: rgba(255, 255, 255, 0.85) !important;
  background: rgba(255, 255, 255, 0.08) !important;
}

.input-panel .author-link svg {
  flex-shrink: 0 !important;
  opacity: 0.6 !important;
  transition: opacity 0.2s ease !important;
}

.input-panel .author-link:hover svg {
  opacity: 0.9 !important;
}

.input-panel .divider {
  color: rgba(255, 255, 255, 0.25) !important;
  font-weight: 300 !important;
  margin: 0 4px !important;
}