/* ===== 工具盒 ToolKitHub - 样式 ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #1e293b;
  --text-secondary: #64748b;
  --border: #e2e8f0;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-hover: 0 10px 25px rgba(0,0,0,0.1);
  --radius: 12px;
  --max-width: 1100px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; width: 100%; }

/* Header */
.site-header {
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  color: white;
  padding: 40px 0 32px;
  text-align: center;
}
.logo {
  font-size: 28px;
  font-weight: 700;
  color: white;
  text-decoration: none;
  display: inline-block;
}
.logo-sub {
  font-size: 16px;
  font-weight: 400;
  color: #94a3b8;
  margin-left: 8px;
}
.tagline {
  font-size: 15px;
  color: #94a3b8;
  margin-top: 6px;
}

/* Tool Grid */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  padding: 40px 0;
}
.tool-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.2s;
  box-shadow: var(--shadow);
  position: relative;
}
.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}
.tool-icon { font-size: 36px; margin-bottom: 12px; }
.tool-card h2 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.tool-card p { font-size: 14px; color: var(--text-secondary); }
.tool-tag {
  display: inline-block;
  font-size: 11px;
  background: #dbeafe;
  color: var(--primary);
  padding: 2px 10px;
  border-radius: 20px;
  margin-top: 12px;
  font-weight: 500;
}

/* Tool Page */
.tool-page {
  padding: 30px 0;
  flex: 1;
}
.back-link {
  display: inline-block;
  margin-bottom: 20px;
  color: var(--primary);
  text-decoration: none;
  font-size: 14px;
}
.back-link:hover { text-decoration: underline; }
.tool-box {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}
.tool-box h1 { font-size: 22px; font-weight: 700; margin-bottom: 6px; }
.tool-box .tool-desc { font-size: 14px; color: var(--text-secondary); margin-bottom: 24px; }
.tool-area { display: flex; flex-direction: column; gap: 16px; }
.tool-label { font-size: 13px; font-weight: 600; color: var(--text-secondary); margin-bottom: 4px; display: block; }
textarea.tool-input, input.tool-input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
  resize: vertical;
  background: #f8fafc;
  transition: border-color 0.2s;
  line-height: 1.5;
}
textarea.tool-input:focus, input.tool-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
textarea.tool-input { min-height: 180px; }
.tool-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 22px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}
.btn-primary {
  background: var(--primary);
  color: white;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary {
  background: #e2e8f0;
  color: var(--text);
}
.btn-secondary:hover { background: #cbd5e1; }
.btn-success {
  background: #16a34a;
  color: white;
}
.btn-success:hover { background: #15803d; }
.btn-sm { padding: 6px 14px; font-size: 12px; }
.tool-output {
  background: #f1f5f9;
  border-radius: 8px;
  padding: 14px;
  min-height: 80px;
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
  font-size: 13px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-all;
  border: 1px solid var(--border);
  position: relative;
}
.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 12px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.15s;
}
.copy-btn:hover { background: var(--primary); color: white; border-color: var(--primary); }
.error-msg {
  color: #dc2626;
  font-size: 13px;
  margin-top: 4px;
  display: none;
}
.error-msg.show { display: block; }

/* Ad */
.ad-placeholder {
  text-align: center;
  padding: 24px 0;
}
.ad-label { font-size: 11px; color: #94a3b8; margin-bottom: 8px; }
.ad-content {
  background: #f1f5f9;
  border-radius: 8px;
  padding: 16px;
  font-size: 14px;
  border: 1px dashed var(--border);
}

/* Recommend */
.recommend {
  margin: 10px 0 30px;
}
.recommend h2 { font-size: 16px; font-weight: 600; margin-bottom: 14px; }
.recommend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}
.recommend-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.15s;
  font-size: 14px;
}
.recommend-item:hover { border-color: var(--primary); background: #eff6ff; }
.rec-icon { font-size: 20px; }
.rec-badge {
  margin-left: auto;
  font-size: 10px;
  background: #fef3c7;
  color: #92400e;
  padding: 2px 8px;
  border-radius: 10px;
  white-space: nowrap;
}

/* Footer */
.site-footer {
  background: #1e293b;
  color: #94a3b8;
  text-align: center;
  padding: 24px 0;
  margin-top: auto;
  font-size: 13px;
}
.footer-links { margin-top: 8px; }
.footer-links a { color: var(--primary); text-decoration: none; }
.footer-links a:hover { text-decoration: underline; }

/* Responsive */
@media (max-width: 640px) {
  .tool-grid { grid-template-columns: 1fr; }
  .tool-box { padding: 20px 16px; }
}