:root {
  --surface: #f4f5f7;
  --surface-alt: #ffffff;
  --surface-muted: #f9fafb;
  --surface-strong: #edeff2;
  --border-subtle: #e1e4e8;
  --border-strong: #c4c8d0;
  --border-color: #d4d7dd;
  --divider-color: #d4d7dd;
  --text-strong: #111827;
  --text-muted: #4b5563;
  --text-disabled: #9ca3af;
  --accent: #111827;
  --accent-muted: #1f2933;
  --accent-soft: #374151;
  --accent-border: #1f2937;
  --accent-contrast: #ffffff;
  --accent-color: #1f2937;
  --primary-color: #111827;
  --secondary-color: #f5f6f8;
  --hover-bg: #f5f6f8;
  --focus-ring: #1d4ed8;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 20px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Segoe UI', 'Inter', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  background: var(--surface);
  color: var(--text-strong);
  line-height: 1.5;
  letter-spacing: 0.01rem;
}

a[class*="bg-gradient-to-"],
div[class*="bg-gradient-to-"],
section[class*="bg-gradient-to-"],
[class*=" bg-gradient-to-"],
[class^="bg-gradient-to-"] {
  background-image: none !important;
  background-color: var(--surface-alt) !important;
}

a {
  color: inherit;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 1px;
}

img {
  max-width: 100%;
  height: auto;
}

.page-shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}

.page-header {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.page-header h1,
.section-title {
  font-size: clamp(1.75rem, 2.5vw, 2.5rem);
  font-weight: 600;
  letter-spacing: 0;
}

.section-eyebrow,
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 720px;
}

.surface-card {
  background: var(--surface-alt);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.card {
  background: var(--surface-alt);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.surface-card.tight {
  padding: 1rem 1.25rem;
}

.surface-card.solid {
  background: var(--surface-muted);
}

.surface-card.no-shadow {
  box-shadow: none;
}

.border-grid {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.surface-card h3 {
  margin: 0 0 0.25rem 0;
  font-size: 1.1rem;
}

.surface-card p {
  margin: 0;
  color: var(--text-muted);
}

.tool-grid,
.cards-grid {
  display: grid;
  gap: 1rem;
}

.tool-grid.two-col {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.tool-grid.three-col {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.stack-sm {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.stack-md {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.action-primary,
.action-secondary,
.action-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  padding: 0.65rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: var(--radius-sm);
  padding: 0.55rem 1.1rem;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-strong);
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent-border);
}

.btn-secondary {
  background: var(--surface-muted);
  color: var(--text-strong);
  border-color: var(--border-subtle);
}

.btn-black {
  background: #111111;
  border-color: #111111;
  color: #fff;
}

.btn:hover {
  background: var(--surface-strong);
}

.btn-primary:hover,
.btn-black:hover {
  background: var(--accent-muted);
  color: #fff;
}

.action-primary {
  background: var(--accent);
  border-color: var(--accent-border);
  color: var(--accent-contrast, #fff);
}

.action-secondary {
  background: var(--surface-muted);
  border-color: var(--border-subtle);
  color: var(--text-strong);
}

.action-ghost {
  background: transparent;
  border-color: var(--border-subtle);
  color: var(--text-muted);
}

.action-primary:hover {
  background: var(--accent-muted);
}

.action-secondary:hover,
.action-ghost:hover {
  background: var(--surface-strong);
}

.tag,
.badge {
  display: inline-flex;
  align-items: center;
  border-radius: var(--radius-sm);
  padding: 0.15rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

.muted-text {
  color: var(--text-muted);
}

.nav-shell {
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 20;
}

.nav-shell .nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-shell .logo-mark {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-shell img {
  height: 36px;
  width: 36px;
  border-radius: var(--radius-sm);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link,
.nav-trigger {
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.85rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
}

.nav-link.is-active,
.nav-link:hover,
.nav-trigger:hover {
  color: var(--text-strong);
  background: var(--surface-muted);
  border-color: var(--border-subtle);
}

.dropdown-panel {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 0.35rem;
  background: var(--surface-alt);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  min-width: 240px;
  box-shadow: var(--shadow-md);
  padding: 0.5rem 0;
}

.dropdown-panel a {
  display: block;
  padding: 0.5rem 0.85rem;
  color: var(--text-strong);
  text-decoration: none;
}

.dropdown-panel a.is-active,
.dropdown-panel a:hover {
  background: var(--surface-muted);
}

.mobile-nav {
  padding: 0 1.25rem 1rem;
  border-top: 1px solid var(--border-subtle);
}

.mobile-nav a {
  display: block;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-strong);
  text-decoration: none;
}

.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.75rem;
}

.stats-bar .stat {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--surface-alt);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.stats-bar .stat strong {
  display: block;
  color: var(--text-strong);
  font-size: 1.25rem;
}

.simple-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.simple-table th,
.simple-table td {
  border: 1px solid var(--border-subtle);
  padding: 0.65rem 0.75rem;
  text-align: left;
}

.simple-table th {
  background: var(--surface-muted);
  font-weight: 600;
}

.inline-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  list-style: none;
}

.inline-list li {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.6rem;
  font-size: 0.85rem;
}

.system-footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.9rem;
}

.glass-effect {
  background: var(--surface-alt);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: none;
}

.rounded-full,
.rounded-3xl,
.rounded-2xl,
.rounded-xl {
  border-radius: var(--radius-md) !important;
}

@media (max-width: 640px) {
  .page-shell {
    padding: 2rem 1rem 3rem;
  }

  .nav-shell .nav-inner {
    height: 56px;
  }

  .nav-links {
    display: none;
  }
}