/* ===== 全局重置 ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --primary: #6c5ce7;
  --primary-light: #a29bfe;
  --primary-dark: #5849c2;
  --accent: #fd79a8;
  --success: #00b894;
  --danger: #e74c3c;
  --warning: #fdcb6e;
  --bg-gradient-start: #eeaeca;
  --bg-gradient-end: #94bbe9;
  --surface: #ffffff;
  --surface-alt: #f8f7fc;
  --border: #e2e0ea;
  --text-primary: #2d2d3a;
  --text-secondary: #6b6b80;
  --text-muted: #a0a0b0;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --transition: all 0.2s ease;
}

html, body {
  height: 100%;
  width: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(344deg, var(--bg-gradient-start), var(--bg-gradient-end));
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== 顶部标题栏 ===== */
.header {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--primary);
}

.logo h1 {
  font-size: 20px;
  font-weight: 700;
}

.header-nav {
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

.nav-btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.nav-btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
}

.nav-btn-danger {
  color: var(--danger);
  border-color: rgba(231,76,60,0.3);
}

.nav-btn-danger:hover {
  background: rgba(231,76,60,0.08);
  color: var(--danger);
  border-color: var(--danger);
}

/* ===== 主体布局 ===== */
.main {
  flex: 1;
  max-width: 1600px;
  width: 100%;
  margin: 0 auto;
  padding: 20px 24px;
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 20px;
}

/* ===== 左侧面板 ===== */
.left-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* 音频上传区 */
.audio-section {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.audio-upload {
  padding: 40px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: 2px dashed transparent;
}

.audio-upload:hover {
  background: var(--surface-alt);
}

.audio-upload.dragover {
  border-color: var(--primary);
  background: rgba(108,92,231,0.05);
}

.upload-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
}

.upload-placeholder svg {
  color: var(--primary-light);
}

.upload-placeholder p {
  font-size: 15px;
  font-weight: 500;
}

.upload-hint {
  font-size: 12px !important;
  color: var(--text-muted) !important;
  font-weight: 400 !important;
}

/* 音频播放器 */
.audio-player {
  padding: 16px 20px;
}

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

.track-info {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.track-icon {
  color: var(--primary);
  flex-shrink: 0;
}

.track-name {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.icon-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  transition: var(--transition);
  display: flex;
  align-items: center;
}

.icon-btn:hover {
  color: var(--primary);
  background: var(--surface-alt);
}

.player-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.play-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
}

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

.play-btn:active {
  transform: scale(0.95);
}

.time-display {
  font-size: 12px;
  font-family: "SF Mono", "Courier New", monospace;
  color: var(--text-secondary);
  min-width: 60px;
  text-align: center;
  flex-shrink: 0;
}

.progress-bar {
  flex: 1;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  position: relative;
  cursor: pointer;
  min-width: 100px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: 3px;
  width: 0%;
  transition: width 0.1s linear;
}

.progress-thumb {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 14px;
  height: 14px;
  background: #fff;
  border: 2px solid var(--primary);
  border-radius: 50%;
  left: 0%;
  transition: left 0.1s linear;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

/* 工具栏 */
.lyric-toolbar {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.toolbar-label {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
}

.offset-input {
  width: 72px;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  font-family: monospace;
  text-align: center;
}

.offset-input:focus {
  outline: none;
  border-color: var(--primary);
}

.toolbar-btn {
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text-primary);
  font-size: 13px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.toolbar-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.toolbar-btn-accent {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  font-weight: 600;
}

.toolbar-btn-accent:hover {
  background: #e8588f;
  color: #fff;
  border-color: #e8588f;
}

.toolbar-btn-accent:active {
  transform: scale(0.95);
}

.toolbar-btn-warning {
  background: var(--warning);
  color: #5a4500;
  border-color: var(--warning);
  font-weight: 600;
}

.toolbar-btn-warning:hover {
  background: #f0b836;
  color: #5a4500;
  border-color: #f0b836;
}

.toolbar-btn-warning:active {
  transform: scale(0.95);
}

.shortcut-hint {
  font-size: 12px;
  color: var(--text-muted);
}

.shortcut-hint kbd {
  display: inline-block;
  padding: 2px 6px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 11px;
  font-family: monospace;
  background: var(--surface-alt);
  margin: 0 2px;
}

/* 歌词列表 */
.lyric-list-container {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 300px;
}

.lyric-list-header {
  display: grid;
  grid-template-columns: 100px 1fr 120px;
  padding: 10px 16px;
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.lyric-list {
  flex: 1;
  overflow-y: auto;
  max-height: calc(100vh - 420px);
  min-height: 200px;
}

.lyric-item {
  display: grid;
  grid-template-columns: 100px 1fr 120px;
  align-items: center;
  padding: 8px 16px;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
}

.lyric-item:hover {
  background: var(--surface-alt);
}

.lyric-item.active {
  background: rgba(108,92,231,0.08);
}

.lyric-item.active .lyric-time {
  color: var(--primary);
  font-weight: 700;
}

.lyric-time {
  font-family: "SF Mono", "Courier New", monospace;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 4px;
}

.lyric-time:hover {
  background: rgba(108,92,231,0.1);
  color: var(--primary);
}

.lyric-time-input {
  font-family: monospace;
  font-size: 13px;
  border: 1px solid var(--primary);
  border-radius: 4px;
  padding: 2px 4px;
  width: 90px;
  outline: none;
}

.lyric-text {
  font-size: 14px;
  padding: 4px 8px;
  border-radius: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lyric-text-input {
  width: 100%;
  font-size: 14px;
  border: 1px solid var(--primary);
  border-radius: 4px;
  padding: 4px 8px;
  outline: none;
}

.lyric-actions {
  display: flex;
  gap: 4px;
  justify-content: flex-end;
}

.action-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 4px;
  transition: var(--transition);
  display: flex;
  align-items: center;
}

.action-btn:hover {
  background: var(--surface-alt);
  color: var(--primary);
}

.action-btn.danger:hover {
  color: var(--danger);
}

.action-btn.jump:hover {
  color: var(--success);
}

.lyric-list-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px;
  text-align: center;
  color: var(--text-muted);
}

.lyric-list-empty p {
  font-size: 14px;
}

.empty-hint {
  font-size: 12px !important;
  color: var(--text-muted) !important;
  margin-top: 4px;
}

/* ===== 右侧面板 ===== */
.right-panel {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow: hidden;
  max-height: calc(100vh - 108px);
}

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

.editor-header h2 {
  font-size: 16px;
  font-weight: 700;
}

.editor-actions {
  display: flex;
  gap: 8px;
}

.editor-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text-primary);
  font-size: 12px;
  cursor: pointer;
  transition: var(--transition);
}

.editor-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.editor-btn-accent {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.editor-btn-accent:hover {
  background: var(--primary-dark);
  color: #fff;
}

/* LRC 元信息 */
.lrc-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.meta-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.meta-row label {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
  width: 56px;
  text-align: justify;
  text-align-last: justify;
  flex-shrink: 0;
}

.meta-input {
  flex: 1;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  min-width: 0;
  width: 100%;
}

.meta-input:focus {
  outline: none;
  border-color: var(--primary);
}

/* 歌词文本编辑区 */
.lyric-textarea {
  flex: 1;
  min-height: 200px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  line-height: 1.8;
  resize: none;
  color: var(--text-primary);
  background: var(--surface-alt);
  transition: var(--transition);
}

.lyric-textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: #fff;
}

/* LRC 预览 */
.lrc-preview-section {
  border-top: 1px solid var(--border);
  padding-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-shrink: 0;
  max-height: 240px;
}

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

.preview-header h3 {
  font-size: 14px;
  font-weight: 600;
}

.preview-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.preview-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.lrc-preview {
  flex: 1;
  overflow: auto;
  padding: 10px 12px;
  background: #1e1e2e;
  color: #cdd6f4;
  border-radius: var(--radius-sm);
  font-family: "SF Mono", "Courier New", monospace;
  font-size: 12px;
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 100px;
  max-height: 180px;
}

/* ===== 底部 ===== */
.footer {
  text-align: center;
  padding: 16px 24px;
  font-size: 12px;
  color: rgba(255,255,255,0.8);
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 12px 24px;
  background: rgba(45,45,58,0.95);
  color: #fff;
  border-radius: 8px;
  font-size: 14px;
  z-index: 9999;
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast.success {
  background: var(--success);
}

.toast.error {
  background: var(--danger);
}

/* ===== 滚动条美化 ===== */
.lyric-list::-webkit-scrollbar,
.lyric-textarea::-webkit-scrollbar,
.lrc-preview::-webkit-scrollbar {
  width: 6px;
}

.lyric-list::-webkit-scrollbar-track,
.lyric-textarea::-webkit-scrollbar-track,
.lrc-preview::-webkit-scrollbar-track {
  background: transparent;
}

.lyric-list::-webkit-scrollbar-thumb,
.lyric-textarea::-webkit-scrollbar-thumb {
  background: rgba(0,0,0,0.15);
  border-radius: 3px;
}

.lrc-preview::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.2);
  border-radius: 3px;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .main {
    grid-template-columns: 1fr;
  }
  
  .right-panel {
    max-height: none;
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    height: auto;
    padding: 12px 16px;
    gap: 8px;
  }
  
  .logo h1 {
    font-size: 16px;
  }
  
  .header-nav {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .nav-btn {
    padding: 6px 10px;
    font-size: 12px;
  }
  
  .main {
    padding: 12px;
    gap: 12px;
  }
  
  .lyric-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  
  .lyric-list-header,
  .lyric-item {
    grid-template-columns: 80px 1fr 80px;
  }
}