:root {
  --spacing-2: 2px;
  --spacing-4: 4px;
  --spacing-8: 8px;
  --spacing-12: 12px;
  --spacing-16: 16px;

  /* Indigo/purple palette - SF-adjacent but distinct */
  --color-primary: #5a4fcf;
  --color-primary-dark: #4338a8;
  --color-primary-light: #8b83e0;

  --color-link: #5a4fcf;
  --color-link-hover: #4338a8;
  --color-visited: #7c6dc7;
  --color-text: #1a1a2e;
  --color-muted: #64648c;
  --color-border: #e0e0eb;
  --color-bg: #fafafc;
  --color-surface: #fff;
  --color-header-bg: linear-gradient(135deg, #1a1a2e 0%, #2d2b55 100%);

  /* Badge colors - more vibrant */
  --badge-oss: #10b981;
  --badge-oss-bg: #ecfdf5;
  --badge-commercial: #db2777;
  --badge-commercial-bg: #fdf2f8;
  --badge-community: #f59e0b;
  --badge-community-bg: #fffbeb;
  --badge-gh: #24292f;
  --badge-gh-bg: #f6f8fa;
  --badge-official: #0176d3;
  --badge-official-bg: #e5f2ff;

  --font-stack: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "SF Mono", Consolas, monospace;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  --shadow-sm: 0 1px 2px rgba(26, 26, 46, 0.05);
  --shadow-md: 0 2px 8px rgba(26, 26, 46, 0.08);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-stack);
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:visited {
  color: var(--color-visited);
}

a:hover {
  color: var(--color-link-hover);
}

/* Header - dark gradient with personality */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-header-bg);
  padding: var(--spacing-12) var(--spacing-16);
  display: flex;
  align-items: center;
  gap: var(--spacing-16);
  flex-wrap: wrap;
  box-shadow: var(--shadow-md);
}

.site-title {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
  letter-spacing: -0.5px;
}

.site-title::before {
  content: ">";
  color: var(--color-primary-light);
  margin-right: 6px;
  opacity: 0.8;
}

.search-box {
  flex: 1;
  min-width: 200px;
  max-width: 400px;
}

.search-input {
  width: 100%;
  padding: var(--spacing-8) var(--spacing-12);
  font-size: 13px;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-stack);
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  transition: background 0.15s ease, box-shadow 0.15s ease;
}

.search-input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.search-input:focus {
  outline: none;
  background: rgba(255, 255, 255, 0.18);
  box-shadow: 0 0 0 2px var(--color-primary-light);
}

.filters {
  display: flex;
  gap: var(--spacing-8);
  align-items: center;
}

.filter-select {
  padding: var(--spacing-4) var(--spacing-8);
  font-size: 11px;
  border: none;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-family: var(--font-stack);
  cursor: pointer;
  transition: background 0.15s ease;
}

.filter-select:hover {
  background: rgba(255, 255, 255, 0.18);
}

.filter-select:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--color-primary-light);
}

.filter-select option {
  background: var(--color-surface);
  color: var(--color-text);
}

.keyboard-hint {
  font-size: 10px;
  color: rgba(255, 255, 255, 0.5);
  white-space: nowrap;
}

kbd {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  padding: 2px 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: rgba(255, 255, 255, 0.8);
}

/* Stats Bar */
.stats-bar {
  background: var(--color-surface);
  padding: var(--spacing-8) var(--spacing-16);
  font-size: 11px;
  color: var(--color-muted);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  gap: var(--spacing-16);
  flex-wrap: wrap;
}

.stats-bar span {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-4);
}

.stats-bar span::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary-light);
}

.stats-bar .legend {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
}

.stats-bar .legend::before {
  display: none;
}

.stats-bar .legend .badge {
  margin-left: 0;
}

/* Main Directory */
.directory {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-16);
  padding: var(--spacing-16);
  align-items: start;
  max-width: 1600px;
  margin: 0 auto;
}

/* Category Section */
.category {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-12);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.category-header {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--color-primary);
  padding-bottom: var(--spacing-8);
  margin-bottom: var(--spacing-8);
  border-bottom: 2px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.category-count {
  font-weight: 500;
  color: var(--color-muted);
  font-size: 10px;
  background: var(--color-bg);
  padding: 2px 6px;
  border-radius: 10px;
}

/* Entry List */
.entry-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.entry {
  padding: var(--spacing-4) 0;
  line-height: 1.4;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}

.entry:last-child {
  padding-bottom: 0;
}

.entry:not(:last-child) {
  border-bottom-color: var(--color-border);
}

.entry-name {
  font-weight: 600;
  font-size: 12px;
}

.entry-name:hover {
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.entry-sep {
  color: var(--color-muted);
  margin: 0 var(--spacing-4);
  opacity: 0.5;
}

.entry-desc {
  font-size: 11px;
  color: var(--color-muted);
}

.entry-badges {
  display: inline;
  margin-left: var(--spacing-4);
}

.badge {
  font-size: 9px;
  padding: 2px 5px;
  border-radius: 10px;
  font-weight: 600;
  text-transform: uppercase;
  margin-left: var(--spacing-2);
  white-space: nowrap;
  letter-spacing: 0.3px;
  border: none;
}

.badge-oss {
  color: var(--badge-oss);
  background: var(--badge-oss-bg);
}

.badge-commercial {
  color: var(--badge-commercial);
  background: var(--badge-commercial-bg);
  font-weight: 700;
}

.badge-community {
  color: var(--badge-community);
  background: var(--badge-community-bg);
  font-weight: 700;
}

.badge-gh {
  color: var(--badge-gh);
  background: var(--badge-gh-bg);
  text-decoration: none;
  transition: background 0.15s ease;
}

.badge-gh:hover {
  background: var(--badge-gh);
  color: #fff;
  text-decoration: none;
}

.badge-official {
  color: var(--badge-official);
  background: var(--badge-official-bg);
  font-weight: 700;
}

/* Footer */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-16);
  font-size: 11px;
  color: var(--color-muted);
  text-align: center;
  background: var(--color-surface);
}

.footer a {
  color: var(--color-primary);
  font-weight: 500;
}

.footer a:hover {
  text-decoration: underline;
}

/* No Results */
.no-results {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--spacing-16) * 2;
  color: var(--color-muted);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--color-border);
}

/* Loading */
.loading {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--spacing-16) * 2;
  color: var(--color-muted);
}

/* Tool Detail Page */
.tool-page {
  max-width: 700px;
  margin: 0 auto;
  padding: var(--spacing-16);
}

.tool-content {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-16) * 2;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.tool-breadcrumb {
  font-size: 12px;
  color: var(--color-muted);
  margin-bottom: var(--spacing-16);
}

.tool-breadcrumb a {
  color: var(--color-primary);
}

.tool-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-12);
  flex-wrap: wrap;
}

.tool-name {
  font-size: 28px;
  font-weight: 700;
  margin: 0;
  color: var(--color-text);
}

.tool-badges {
  display: flex;
  gap: var(--spacing-4);
}

.tool-badges .badge {
  font-size: 11px;
  padding: 4px 8px;
}

.tool-description {
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  margin: 0 0 var(--spacing-16) 0;
}

.tool-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-16);
  margin-bottom: var(--spacing-16);
  padding: var(--spacing-12);
  background: var(--color-bg);
  border-radius: var(--radius-md);
}

.tool-meta-item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.tool-meta-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-muted);
  font-weight: 600;
}

.tool-meta-value {
  font-size: 14px;
  color: var(--color-text);
}

.tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-16);
}

.tool-tag {
  font-size: 12px;
  padding: var(--spacing-4) var(--spacing-8);
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  color: var(--color-muted);
}

.tool-actions {
  display: flex;
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-16);
  flex-wrap: wrap;
}

.tool-button {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-12) var(--spacing-16);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background 0.15s ease, box-shadow 0.15s ease;
}

.tool-button-primary {
  background: var(--color-primary);
  color: #fff;
}

.tool-button-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
}

.tool-button-secondary {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.tool-button-secondary:hover {
  background: var(--color-border);
  color: var(--color-text);
}

.tool-back {
  display: inline-block;
  font-size: 13px;
  color: var(--color-primary);
}

.tool-back:hover {
  text-decoration: underline;
}

.tool-error {
  text-align: center;
  padding: var(--spacing-16) * 2;
}

.tool-error h1 {
  font-size: 20px;
  color: var(--color-muted);
  margin-bottom: var(--spacing-16);
}

/* Responsive */
@media (max-width: 900px) {
  .directory {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-12);
  }
}

@media (max-width: 600px) {
  .directory {
    grid-template-columns: 1fr;
    padding: var(--spacing-12);
  }

  .header {
    padding: var(--spacing-8) var(--spacing-12);
    gap: var(--spacing-8);
  }

  .site-title {
    font-size: 16px;
  }

  .search-box {
    order: 3;
    min-width: 100%;
  }

  .filters {
    flex-wrap: wrap;
  }

  .keyboard-hint {
    display: none;
  }

  .category {
    padding: var(--spacing-8);
  }
}