/* ToolNest Global Styles - lightweight, no dependencies */
:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --bg: #f9fafb;
  --card: #ffffff;
  --text: #1f2937;
  --text-light: #6b7280;
  --border: #e5e7eb;
  --success: #10b981;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.04);
  --radius: 8px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; width: 100%; }

/* Header */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo:hover { text-decoration: none; }
.nav { display: flex; gap: 24px; align-items: center; }
.nav a { color: var(--text-light); font-size: 0.95rem; font-weight: 500; }
.nav a:hover { color: var(--primary); text-decoration: none; }

/* Main */
main { flex: 1; padding: 40px 0; }

/* Hero */
.hero { text-align: center; padding: 40px 0 30px; }
.hero h1 { font-size: 2.4rem; font-weight: 800; margin-bottom: 12px; letter-spacing: -0.02em; }
.hero p { font-size: 1.1rem; color: var(--text-light); max-width: 600px; margin: 0 auto; }

/* Tool grid */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 32px;
}
.tool-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all 0.2s;
  display: block;
  color: inherit;
}
.tool-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
  text-decoration: none;
}
.tool-card .icon { font-size: 2rem; margin-bottom: 12px; display: block; }
.tool-card h3 { font-size: 1.1rem; margin-bottom: 6px; }
.tool-card p { font-size: 0.9rem; color: var(--text-light); }

/* Tool page layout */
.tool-page { max-width: 800px; margin: 0 auto; }
.tool-header { margin-bottom: 24px; }
.tool-header h1 { font-size: 1.8rem; margin-bottom: 8px; }
.tool-header p { color: var(--text-light); }
.tool-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
textarea, input[type="text"], input[type="number"], select {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.95rem;
  background: #fff;
  color: var(--text);
}
textarea { min-height: 160px; resize: vertical; }
textarea:focus, input:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.btn {
  padding: 10px 18px;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  background: var(--primary);
  color: #fff;
}
.btn:hover { background: var(--primary-dark); }
.btn.secondary { background: #e5e7eb; color: var(--text); }
.btn.secondary:hover { background: #d1d5db; }
.btn.success { background: var(--success); }
.output-box {
  margin-top: 16px;
  padding: 14px;
  background: #f3f4f6;
  border-radius: var(--radius);
  font-family: "SFMono-Regular", Consolas, Menlo, monospace;
  font-size: 0.92rem;
  word-break: break-all;
  min-height: 48px;
  display: flex;
  align-items: center;
}
.stats { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 16px; }
.stat {
  background: #f3f4f6;
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 0.9rem;
}
.stat strong { color: var(--primary); font-size: 1.2rem; display: block; }

/* Ad slot */
.ad-slot {
  margin: 32px 0;
  padding: 16px;
  background: #f3f4f6;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  text-align: center;
  color: var(--text-light);
  font-size: 0.85rem;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ad-slot::before { content: "Ad Slot"; }

/* Article */
.article { max-width: 720px; margin: 40px auto; }
.article h1 { font-size: 2rem; margin-bottom: 8px; }
.article .meta { color: var(--text-light); font-size: 0.9rem; margin-bottom: 24px; }
.article h2 { font-size: 1.4rem; margin: 28px 0 12px; }
.article h3 { font-size: 1.15rem; margin: 22px 0 10px; }
.article p { margin-bottom: 14px; }
.article ul, .article ol { margin: 0 0 14px 24px; }
.article li { margin-bottom: 6px; }
.article code {
  background: #f3f4f6;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}
.article pre {
  background: #1f2937;
  color: #e5e7eb;
  padding: 16px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 14px 0;
}
.article pre code { background: none; padding: 0; }
.article blockquote {
  border-left: 4px solid var(--primary);
  padding-left: 16px;
  color: var(--text-light);
  margin: 14px 0;
}

/* Footer */
.site-footer {
  background: #111827;
  color: #9ca3af;
  padding: 40px 0 20px;
  margin-top: 60px;
}
.site-footer .container { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; }
.site-footer h4 { color: #fff; margin-bottom: 12px; font-size: 1rem; }
.site-footer a { color: #9ca3af; display: block; padding: 4px 0; font-size: 0.9rem; }
.site-footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid #374151; margin-top: 24px; padding-top: 16px; font-size: 0.85rem; text-align: center; }

/* Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 1.8rem; }
  .nav { gap: 14px; }
  .nav a:not(.logo) { display: none; }
  .site-footer .container { grid-template-columns: 1fr; }
}