:root {
  --navy: #0f172a;
  --slate-900: #0f172a;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748b;
  --slate-300: #cbd5e1;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50: #f8fafc;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --white: #ffffff;

  --ev-self: #94a3b8;
  --ev-doc: #3b82f6;
  --ev-operator: #6366f1;
  --ev-crypto: #8b5cf6;
  --ev-audit: #16a34a;

  --radius: 8px;
  --max-width: 1120px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--slate-900);
  background: var(--white);
  line-height: 1.55;
}

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

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Prototype banner */
.proto-banner {
  background: #fef3c7;
  color: #78350f;
  font-size: 13px;
  text-align: center;
  padding: 8px 16px;
  border-bottom: 1px solid #fde68a;
}
.proto-banner strong { font-weight: 700; }

/* Header */
header.site-header {
  border-bottom: 1px solid var(--slate-200);
  background: var(--white);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--slate-900);
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo .mark {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--navy);
  color: white;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
}
.logo:hover { text-decoration: none; }
nav.main-nav {
  display: flex;
  gap: 28px;
  align-items: center;
}
nav.main-nav a {
  color: var(--slate-700);
  font-size: 14.5px;
  font-weight: 600;
}
nav.main-nav a:hover { color: var(--accent); text-decoration: none; }
.nav-cta {
  background: var(--navy);
  color: white !important;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 14px !important;
}
.nav-cta:hover { background: var(--accent-dark); text-decoration: none !important; }

/* Hero */
.hero {
  padding: 72px 0 56px;
  background: linear-gradient(180deg, var(--slate-50) 0%, var(--white) 100%);
  border-bottom: 1px solid var(--slate-200);
}
.hero h1 {
  font-size: 42px;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  max-width: 760px;
}
.hero p.lead {
  font-size: 18px;
  color: var(--slate-600);
  max-width: 620px;
  margin: 0 0 32px;
}
.search-box {
  display: flex;
  max-width: 560px;
  gap: 8px;
}
.search-box input {
  flex: 1;
  padding: 13px 16px;
  border: 1px solid var(--slate-300);
  border-radius: 6px;
  font-size: 15px;
}
.search-box button {
  padding: 13px 22px;
  background: var(--navy);
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
.search-box button:hover { background: var(--accent-dark); }

/* Sections */
section { padding: 56px 0; }
section.alt { background: var(--slate-50); }
h2.section-title {
  font-size: 26px;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}
p.section-sub {
  color: var(--slate-600);
  margin: 0 0 32px;
  max-width: 640px;
}

/* Category grid */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.cat-card {
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  padding: 20px;
  background: white;
  transition: border-color .15s, transform .15s;
}
.cat-card:hover { border-color: var(--accent); text-decoration: none; }
.cat-card h3 { margin: 0 0 6px; font-size: 16px; color: var(--slate-900); }
.cat-card p { margin: 0; font-size: 13.5px; color: var(--slate-500); }

/* Listing cards */
.listing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.listing-card {
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  padding: 18px;
  background: white;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.listing-card:hover { border-color: var(--accent); text-decoration: none; box-shadow: 0 2px 10px rgba(15,23,42,0.06); }
.listing-card .lc-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
}
.listing-card h3 { margin: 0; font-size: 16.5px; color: var(--slate-900); }
.listing-card .operator { font-size: 13px; color: var(--slate-500); margin: -4px 0 0; }
.listing-card .purpose { font-size: 13.5px; color: var(--slate-600); margin: 0; }
.listing-card .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }

/* Evidence badges */
.badge {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 999px;
  color: white;
  white-space: nowrap;
}
.badge-self { background: var(--ev-self); }
.badge-doc { background: var(--ev-doc); }
.badge-operator { background: var(--ev-operator); }
.badge-crypto { background: var(--ev-crypto); }
.badge-audit { background: var(--ev-audit); }

.tag {
  font-size: 11px;
  color: var(--slate-600);
  background: var(--slate-100);
  border: 1px solid var(--slate-200);
  padding: 2px 8px;
  border-radius: 999px;
}

/* Evidence explainer */
.ev-explainer {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
}
.ev-item {
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  padding: 16px;
}
.ev-item .badge { margin-bottom: 10px; }
.ev-item p { margin: 0; font-size: 13.5px; color: var(--slate-600); }

/* Filters (directory page) */
.directory-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  align-items: flex-start;
}
.filters {
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  padding: 18px;
  position: sticky;
  top: 88px;
}
.filters h4 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--slate-500);
  margin: 18px 0 10px;
}
.filters h4:first-child { margin-top: 0; }
.filters label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--slate-700);
  margin-bottom: 8px;
  cursor: pointer;
}
.filters input[type="checkbox"] { accent-color: var(--navy); }
.filter-count { font-size: 12.5px; color: var(--slate-500); margin-bottom: 16px; }
.reset-link { font-size: 12.5px; }

/* Table (methodology) */
table.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 16px 0 32px;
}
table.spec-table th, table.spec-table td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--slate-200);
  vertical-align: top;
}
table.spec-table th { color: var(--slate-500); font-size: 12px; text-transform: uppercase; letter-spacing: .05em; }

/* Profile page */
.profile-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 16px;
  border-bottom: 1px solid var(--slate-200);
  padding-bottom: 24px;
  margin-bottom: 28px;
}
.profile-header h1 { margin: 0 0 6px; font-size: 30px; }
.profile-header .operator-line { color: var(--slate-500); font-size: 15px; }
.field-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}
.field-item dt {
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--slate-500);
  margin-bottom: 4px;
}
.field-item dd { margin: 0; font-size: 14.5px; color: var(--slate-900); }
.field-item { margin: 0; }

/* Forms */
form.static-form {
  max-width: 560px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
form.static-form label {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--slate-700);
  display: block;
  margin-bottom: 6px;
}
form.static-form input, form.static-form textarea, form.static-form select {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--slate-300);
  border-radius: 6px;
  font-size: 14.5px;
  font-family: inherit;
}
form.static-form button {
  align-self: flex-start;
  padding: 12px 22px;
  background: var(--navy);
  color: white;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
}
form.static-form button:hover { background: var(--accent-dark); }
.form-note {
  font-size: 13px;
  color: var(--slate-500);
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  padding: 12px 14px;
  border-radius: 6px;
}

/* Footer */
footer.site-footer {
  border-top: 1px solid var(--slate-200);
  background: var(--slate-50);
  padding: 40px 0;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 24px;
}
.footer-grid h5 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--slate-500);
  margin: 0 0 12px;
}
.footer-grid a { display: block; font-size: 13.5px; color: var(--slate-700); margin-bottom: 8px; }
.footer-brand p { font-size: 13.5px; color: var(--slate-500); max-width: 280px; }
.footer-bottom {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--slate-200);
  font-size: 12.5px;
  color: var(--slate-500);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

/* Newsletter */
.newsletter-box {
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  padding: 28px;
  background: var(--navy);
  color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}
.newsletter-box h3 { margin: 0 0 4px; font-size: 19px; }
.newsletter-box p { margin: 0; color: var(--slate-300); font-size: 14px; }
.newsletter-box form { display: flex; gap: 8px; }
.newsletter-box input {
  padding: 11px 14px;
  border-radius: 6px;
  border: none;
  min-width: 220px;
}
.newsletter-box button {
  padding: 11px 20px;
  border-radius: 6px;
  border: none;
  background: var(--accent);
  color: white;
  font-weight: 600;
  cursor: pointer;
}
.newsletter-box button:hover { background: var(--accent-dark); }

.prose { max-width: 720px; }
.prose h2 { margin-top: 36px; }
.prose p { color: var(--slate-700); }
.prose ul { color: var(--slate-700); }

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--slate-500);
}

/* Comparison tables */
table.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  margin: 8px 0 40px;
}
table.compare-table th, table.compare-table td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--slate-200);
  vertical-align: middle;
}
table.compare-table thead th {
  color: var(--slate-500);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: .04em;
  border-bottom: 2px solid var(--slate-300);
}
table.compare-table td.name-cell { font-weight: 700; color: var(--slate-900); }
table.compare-table td.name-cell a { color: var(--slate-900); }
table.compare-table td.name-cell span { display:block; font-weight: 400; font-size: 12px; color: var(--slate-500); }
.chk-yes { color: var(--ev-audit); font-weight: 800; }
.chk-no { color: var(--slate-300); }
.compare-note {
  font-size: 13px;
  color: var(--slate-600);
  border-left: 3px solid var(--slate-300);
  padding: 4px 0 4px 14px;
  margin: -4px 0 20px;
}

@media (max-width: 820px) {
  nav.main-nav { display: none; }
  .directory-layout { grid-template-columns: 1fr; }
  .filters { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 32px; }
}