/* 基础变量 */
:root {
  --color-bg: #1a1a2e;
  --color-surface: #16213e;
  --color-surface-light: #1e2a47;
  --color-primary: #6366f1;
  --color-primary-hover: #818cf8;
  --color-text: #e2e8f0;
  --color-text-secondary: #94a3b8;
  --color-border: #2d3748;
  --color-hover: #2d3748;
  --color-error: #ef4444;
  --color-success: #22c55e;
  
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;
  
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  
  --sidebar-width: 240px;
}

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

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* 无障碍 - 屏幕阅读器专用 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* 应用容器 */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
  width: var(--sidebar-width);
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar-header {
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-header i {
  font-size: 24px;
  color: var(--color-primary);
}

.sidebar-header h1 {
  font-size: 18px;
  font-weight: 600;
}

.sidebar-nav {
  flex: 1;
  padding: 12px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 12px 16px;
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  font-size: 14px;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: all 0.2s;
  text-align: left;
  text-decoration: none;
}

.nav-item:hover {
  background: var(--color-hover);
  color: var(--color-text);
}

.nav-item.active {
  background: var(--color-primary);
  color: white;
}

.nav-item i {
  width: 20px;
  text-align: center;
  font-size: 16px;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--color-border);
  font-size: 12px;
  color: var(--color-text-secondary);
}

/* 主内容区 */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* 工具头部 */
.tool-header {
  padding: 16px 24px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-text {
  flex: 1;
  min-width: 0;
}

.tool-header h1 {
  font-size: 24px;
  font-weight: 600;
  margin: 0;
  line-height: 1.3;
}

/* 面包屑导航 */
.breadcrumb {
  margin-top: 4px;
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--color-text-secondary);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb li:not(:last-child)::after {
  content: '/';
  color: var(--color-text-secondary);
  opacity: 0.5;
}

.breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s;
}

.breadcrumb a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

.tool-badge {
  padding: 4px 12px;
  background: var(--color-primary);
  color: white;
  font-size: 12px;
  font-weight: 500;
  border-radius: 20px;
  white-space: nowrap;
}

.btn-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: all 0.2s;
}

.btn-icon:hover {
  background: var(--color-hover);
  color: var(--color-text);
}

#btn-menu {
  display: none;
}

/* 工具内容区 */
.tool-content {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
}

.tool-panel {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tool-panel h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.tool-panel.active {
  display: block;
}

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

.tool-article {
  max-width: 100%;
}

.tool-desc {
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  font-size: 14px;
  line-height: 1.8;
}

/* 表单元素 */
.form-group {
  margin-bottom: 20px;
}

.form-group label,
.panel-header label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
}

textarea, input[type="text"], select {
  width: 100%;
  padding: 12px 16px;
  background: var(--color-surface-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 14px;
  transition: border-color 0.2s;
}

textarea {
  min-height: 120px;
  resize: vertical;
}

textarea:focus, input[type="text"]:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
}

.char-count {
  margin-top: 8px;
  font-size: 12px;
  color: var(--color-text-secondary);
  text-align: right;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s;
}

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

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--color-surface-light);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

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

.form-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}

/* 滑块 */
input[type="range"] {
  width: 100%;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--color-border);
  border-radius: 3px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* 音量控制 */
.volume-control {
  display: flex;
  align-items: center;
  gap: 12px;
}

.volume-control input[type="range"] {
  flex: 1;
}

.volume-control span {
  min-width: 40px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* JSON 工具 */
.json-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.json-panel {
  flex: 1;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 500;
}

.panel-header select {
  width: auto;
  padding: 6px 10px;
  font-size: 12px;
}

.json-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  padding: 8px 0;
}

.json-error {
  margin-top: 16px;
  padding: 12px 16px;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--color-error);
  border-radius: var(--radius-md);
  color: var(--color-error);
  font-size: 13px;
  font-family: var(--font-mono);
}

/* 编解码工具 */
.encode-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.encode-panel {
  flex: 1;
}

.encode-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  padding: 8px 0;
}

/* 颜色工具 */
.color-container {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.color-preview {
  display: flex;
  gap: 16px;
  align-items: center;
}

.color-box {
  width: 100px;
  height: 100px;
  background: #6366f1;
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-border);
}

input[type="color"] {
  width: 60px;
  height: 40px;
  padding: 2px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
}

input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 2px;
}

input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: 4px;
}

.color-inputs {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.color-input-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.color-input-group label {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.color-input-wrapper {
  display: flex;
  gap: 8px;
}

.color-input-wrapper input {
  flex: 1;
}

.color-presets {
  margin-top: 8px;
}

.color-presets label {
  display: block;
  margin-bottom: 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.preset-colors {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.preset-color {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.2s;
}

.preset-color:hover {
  transform: scale(1.1);
  border-color: var(--color-text);
}

/* AI 文字生成图片工具 */
.imggen-container {
  display: flex;
  gap: 24px;
}

.imggen-form {
  flex: 1;
  min-width: 0;
}

.imggen-result {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.imggen-options {
  display: flex;
  gap: 16px;
}

.imggen-options .form-group {
  flex: 1;
}

.imggen-preview {
  background: var(--color-surface-light);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.imggen-placeholder {
  text-align: center;
  color: var(--color-text-secondary);
  padding: 40px;
}

.imggen-placeholder i {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.imggen-placeholder p {
  font-size: 14px;
}

.imggen-preview img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--radius-lg);
}

.imggen-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.imggen-info {
  margin-top: 20px;
  padding: 16px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-md);
}

.imggen-info p {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin: 0;
}

.imggen-info i {
  color: var(--color-primary);
  margin-right: 8px;
}

@media (max-width: 768px) {
  .imggen-container {
    flex-direction: column;
  }
  .imggen-options {
    flex-direction: column;
  }
}

/* 中英互译工具 */
.translate-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.translate-header {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: center;
}

.translate-direction {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
}

.translate-body {
  display: flex;
  gap: 16px;
  align-items: stretch;
}

.translate-panel {
  flex: 1;
  min-width: 0;
}

.translate-panel textarea {
  min-height: 150px;
}

.translate-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
}

.btn-translate {
  padding: 14px 24px;
  font-size: 16px;
  white-space: nowrap;
}

.translate-info {
  margin-top: 20px;
  padding: 16px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-md);
}

.translate-info p {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin: 0;
}

.translate-info i {
  color: var(--color-primary);
  margin-right: 8px;
}

.panel-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

@media (max-width: 768px) {
  .translate-body {
    flex-direction: column;
  }
  .translate-actions {
    padding: 8px 0;
  }
}

/* Toast 通知 */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1100;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 20px;
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: var(--radius-md);
  font-size: 14px;
  box-shadow: var(--shadow-md);
  animation: toastSlideIn 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  border-left: 4px solid var(--color-primary);
}

.toast.success {
  border-left-color: var(--color-success);
}

.toast.error {
  border-left-color: var(--color-error);
}

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

/* 页脚 */
.site-footer {
  margin-top: auto;
  padding: 24px;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer-content p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.footer-sub {
  margin-top: 4px;
  font-size: 12px !important;
  opacity: 0.7;
}

/* TTS 信息 */
.tts-info {
  margin-top: 20px;
  padding: 12px 16px;
  background: rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--color-text-secondary);
}

.tts-info i {
  margin-right: 8px;
  color: var(--color-primary);
}

/* ASR 语音识别样式 */
.asr-container {
  margin-top: 16px;
}

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

.file-upload-area:hover,
.file-upload-area.dragover {
  border-color: var(--color-primary);
  background: rgba(99, 102, 241, 0.05);
}

.file-upload-area i {
  font-size: 48px;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.file-upload-area p {
  font-size: 16px;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

.file-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  margin-top: 12px;
}

.file-info i.fa-file-audio {
  font-size: 24px;
  color: var(--color-primary);
}

.file-info span {
  flex: 1;
  font-size: 14px;
}

.file-info .btn-icon {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 4px;
}

.file-info .btn-icon:hover {
  color: var(--color-danger);
}

.asr-info {
  margin-top: 20px;
  padding: 12px 16px;
  background: rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--color-text-secondary);
}

.asr-info i {
  margin-right: 8px;
  color: var(--color-primary);
}

/* ASR Tabs */
.asr-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 12px;
}

.asr-tab {
  padding: 10px 20px;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

.asr-tab:hover {
  background: var(--color-bg);
}

.asr-tab.active {
  background: var(--color-primary);
  color: white;
}

.asr-tab i {
  margin-right: 6px;
}

.asr-tab-content {
  display: none;
}

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

/* Record Area */
.record-area {
  text-align: center;
  padding: 20px;
}

.record-visual {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 30px;
  margin-bottom: 20px;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.record-wave {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  height: 60px;
  margin-bottom: 10px;
}

.record-wave-bar {
  width: 4px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: height 0.1s ease;
}

.record-timer {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}

.record-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 16px;
}

.btn-record {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: none;
  background: var(--color-primary);
  color: white;
  font-size: 28px;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-record:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 16px rgba(99, 102, 241, 0.5);
}

.btn-record.recording {
  background: var(--color-danger);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4); }
  50% { box-shadow: 0 4px 20px rgba(239, 68, 68, 0.6); }
}

.btn-record-stop {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: none;
  background: var(--color-danger);
  color: white;
  font-size: 28px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-record-stop:hover {
  transform: scale(1.05);
}

.record-info {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.record-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.permission-hint {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  padding: 12px 16px;
  background: #fff8e1;
  border: 1px solid #ffe082;
  border-radius: 8px;
  font-size: 13px;
  color: #795548;
  line-height: 1.5;
}

.permission-hint i {
  color: #ff9800;
  font-size: 18px;
  margin-top: 2px;
  flex-shrink: 0;
}

.permission-hint strong {
  display: block;
  margin-bottom: 4px;
}

.permission-hint ul {
  margin: 4px 0 0;
  padding-left: 16px;
}

.permission-hint li {
  margin-bottom: 2px;
}

.label-hint {
  font-weight: normal;
  font-size: 12px;
  color: var(--color-text-secondary);
}

textarea#tts-style {
  min-height: 60px;
}

/* MD5 工具 */
.md5-info {
  margin-top: 20px;
  padding: 12px 16px;
  background: rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--color-text-secondary);
}

.md5-info i {
  margin-right: 8px;
  color: var(--color-primary);
}

#md5-output {
  width: 100%;
  padding: 12px 16px;
  background: var(--color-surface-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 14px;
  cursor: text;
}

#md5-output:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* 响应式 */
@media (max-width: 768px) {
  :root {
    --sidebar-width: 0px;
  }
  
  .sidebar {
    transform: translateX(-100%);
    width: 280px;
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  #btn-menu {
    display: flex;
  }
  
  .json-actions, .encode-actions {
    flex-wrap: wrap;
  }
  
  .form-actions {
    flex-wrap: wrap;
  }
  
  .color-preview {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .tool-header {
    padding: 12px 16px;
  }
  
  .tool-header h1 {
    font-size: 18px;
  }
  
  .tool-content {
    padding: 16px;
  }
  
  .site-footer {
    padding: 16px;
  }
}