/* ===== 全站共享样式 ===== */
:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.04);
  --radius: 12px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }

/* 导航栏 */
.navbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}
.navbar .logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.navbar .logo span { font-size: 24px; }
.navbar nav { margin-left: auto; display: flex; gap: 4px; }
.navbar nav a {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-muted);
  transition: all .2s;
}
.navbar nav a:hover,
.navbar nav a.active {
  background: var(--primary);
  color: #fff;
}

/* 容器 */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 24px;
}

/* 工具页面标题 */
.tool-header {
  text-align: center;
  margin-bottom: 32px;
}
.tool-header h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
}
.tool-header p {
  color: var(--text-muted);
  font-size: 15px;
}

/* 卡片 */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

/* 首页工具网格 */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 32px;
}
.tool-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all .2s;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: block;
}
.tool-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,.1);
  border-color: var(--primary);
}
.tool-card .icon {
  font-size: 36px;
  margin-bottom: 12px;
}
.tool-card h3 {
  font-size: 17px;
  margin-bottom: 6px;
}
.tool-card p {
  font-size: 13px;
  color: var(--text-muted);
}
.tool-card .badge {
  display: inline-block;
  margin-top: 10px;
  padding: 2px 10px;
  border-radius: 99px;
  font-size: 11px;
  font-weight: 600;
}
.badge-hot { background: #fef2f2; color: #dc2626; }
.badge-new { background: #f0fdf4; color: #16a34a; }
.badge-dev { background: #eff6ff; color: #2563eb; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all .2s;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
}
.btn:disabled {
  opacity: .5;
  cursor: not-allowed;
}

/* 上传区域 */
.upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: all .2s;
  background: #fafbff;
}
.upload-area:hover,
.upload-area.dragover {
  border-color: var(--primary);
  background: #eef2ff;
}
.upload-area .icon { font-size: 48px; margin-bottom: 12px; }
.upload-area p { color: var(--text-muted); font-size: 14px; }

/* 文本区域 */
.textarea-wrap textarea {
  width: 100%;
  min-height: 300px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: "Cascadia Code", "Fira Code", Consolas, monospace;
  font-size: 14px;
  line-height: 1.6;
  resize: vertical;
  outline: none;
  transition: border-color .2s;
}
.textarea-wrap textarea:focus {
  border-color: var(--primary);
}

/* 结果区域 */
.result-area {
  margin-top: 20px;
}
.result-area .card {
  background: #f8fafc;
}

/* 进度条 */
.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
  margin: 16px 0;
}
.progress-bar .fill {
  height: 100%;
  background: var(--primary);
  border-radius: 3px;
  transition: width .3s;
}

/* 统计信息 */
.stats {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin: 16px 0;
  flex-wrap: wrap;
}
.stat-item {
  text-align: center;
}
.stat-item .value {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
}
.stat-item .label {
  font-size: 12px;
  color: var(--text-muted);
}

/* 页脚 */
.footer {
  text-align: center;
  padding: 24px;
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 48px;
  border-top: 1px solid var(--border);
}

/* 使用教程 */
.tutorial-box {
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
  border: 1px solid #bae6fd;
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 24px;
}
.tutorial-box h3 {
  font-size: 14px;
  font-weight: 700;
  color: #0369a1;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.tutorial-box ol, .tutorial-box ul {
  margin: 0;
  padding-left: 20px;
  font-size: 13px;
  color: #0c4a6e;
  line-height: 1.8;
}
.tutorial-box li {
  margin-bottom: 4px;
}
.tutorial-box .tip {
  margin-top: 10px;
  padding: 8px 12px;
  background: rgba(255,255,255,0.7);
  border-radius: 6px;
  font-size: 12px;
  color: #0369a1;
}
.tutorial-box .tip strong {
  color: #0c4a6e;
}

/* 响应式 */
@media (max-width: 640px) {
  .container { padding: 20px 16px; }
  .tool-header h1 { font-size: 22px; }
  .tools-grid { grid-template-columns: 1fr; }
  .navbar nav { gap: 2px; }
  .navbar nav a { padding: 6px 10px; font-size: 12px; }
  .tutorial-box { padding: 12px 16px; }
  .tutorial-box ol, .tutorial-box ul { font-size: 12px; }
}