/* ===== DevTools 全局样式 · 浅色清爽 ===== */
:root {
  --bg: #f6f8fa;
  --bg-card: #ffffff;
  --bg-soft: #eef2f6;
  --border: #e1e4e8;
  --border-strong: #cbd1d8;
  --text: #1f2328;
  --text-soft: #57606a;
  --text-muted: #8b949e;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-soft: #dbeafe;
  --danger: #dc2626;
  --danger-soft: #fee2e2;
  --success: #16a34a;
  --success-soft: #dcfce7;
  --warn: #d97706;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow-sm: 0 1px 2px rgba(31, 35, 40, 0.06);
  --shadow: 0 4px 12px rgba(31, 35, 40, 0.08);
  --mono: "SFMono-Regular", "JetBrains Mono", "Cascadia Code", Consolas, "Liberation Mono", Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: var(--sans);
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

/* ===== 顶部导航栏 ===== */
.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 56px;
  padding: 0 24px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.topbar .brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
}
.topbar .brand .logo {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 15px;
}
.topbar .brand:hover { text-decoration: none; }
.topbar .crumb {
  color: var(--text-muted);
  font-size: 13px;
}
.topbar .spacer { flex: 1; }
.topbar .meta {
  color: var(--text-muted);
  font-size: 12px;
}

/* ===== 通用按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--text);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all .15s ease;
  user-select: none;
}
.btn:hover { background: var(--bg-soft); border-color: var(--text-muted); }
.btn:active { transform: translateY(1px); }
.btn.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.btn.primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.ghost:hover { background: var(--bg-soft); }
.btn.danger { color: var(--danger); border-color: var(--danger-soft); }
.btn.danger:hover { background: var(--danger-soft); }
.btn.icon { padding: 7px 9px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ===== 首页:工具卡片 ===== */
.home {
  max-width: 1080px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}
.home-hero {
  text-align: center;
  margin-bottom: 40px;
}
.home-hero h1 {
  font-size: 30px;
  margin: 0 0 8px;
  letter-spacing: -.5px;
}
.home-hero p {
  color: var(--text-soft);
  margin: 0;
  font-size: 15px;
}
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.tool-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  color: var(--text);
  transition: all .18s ease;
  cursor: pointer;
  text-decoration: none;
}
.tool-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
  text-decoration: none;
}
.tool-card .emoji {
  font-size: 26px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: var(--primary-soft);
  border-radius: 10px;
}
.tool-card .name { font-size: 15px; font-weight: 600; }
.tool-card .desc { font-size: 12.5px; color: var(--text-soft); line-height: 1.5; }
.tool-card .tag {
  align-self: flex-start;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 20px;
  background: var(--success-soft);
  color: var(--success);
}
.tool-card.disabled {
  opacity: .55;
  cursor: not-allowed;
  filter: grayscale(.4);
}
.tool-card.disabled:hover {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
  transform: none;
}
.tool-card.disabled .tag {
  background: var(--bg-soft);
  color: var(--text-muted);
}

/* ===== 工具页通用布局 ===== */
.tool-page {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 56px);
}
.tool-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 24px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.tool-header h2 { margin: 0; font-size: 17px; }
.tool-header .tools-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}
.tool-header .spacer { flex: 1; }
.tool-body {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: 16px 24px 24px;
  gap: 12px;
}

/* ===== 通用面板 ===== */
.panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.panel-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: 13px;
  color: var(--text-soft);
}
.panel-head .spacer { flex: 1; }

/* ===== 状态条 ===== */
.status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--text-soft);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
}
.status.ok { background: var(--success-soft); color: var(--success); }
.status.err { background: var(--danger-soft); color: var(--danger); }
.status .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--text-muted);
}
.status.ok .dot { background: var(--success); }
.status.err .dot { background: var(--danger); }

/* ===== 输入区(textarea) ===== */
.code-area {
  width: 100%;
  border: none;
  outline: none;
  resize: none;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  padding: 14px 16px;
  background: #fbfcfd;
  color: var(--text);
  tab-size: 2;
}
.code-area::placeholder { color: var(--text-muted); }

/* ===== 文件上传按钮 ===== */
.file-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-soft);
  cursor: pointer;
  transition: all .15s;
}
.file-label:hover { border-color: var(--primary); color: var(--primary); }
.file-label input { display: none; }