:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface-soft: #f0f3f7;
  --border: #e2e6ee;
  --border-strong: #d0d6e1;
  --text: #0f172a;
  --text-muted: #5b6578;
  --text-faint: #8891a4;
  --brand: #0b5fff;
  --brand-hover: #0847c7;
  --brand-soft: #e8f0ff;
  --ok: #0a7a45;
  --ok-bg: #e6f7ee;
  --info: #0b5fff;
  --info-bg: #e8f0ff;
  --warn: #9a6700;
  --warn-bg: #fff6de;
  --caution: #b45309;
  --caution-bg: #fff1e6;
  --danger: #b42318;
  --danger-bg: #fdeceb;
  --featured: #f5f0ff;
  --featured-border: #c4b5fd;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px rgba(15, 23, 42, 0.06);
  --radius: 12px;
  --radius-sm: 8px;
  --font: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "SF Mono", "Menlo", "Consolas", monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
}

.container {
  width: min(1120px, calc(100% - 2.5rem));
  margin: 0 auto;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 248, 250, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.9rem 0;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(145deg, #0b5fff 0%, #4f46e5 100%);
  display: grid;
  place-items: center;
  color: white;
  box-shadow: 0 4px 10px rgba(11, 95, 255, 0.28);
}

.logo-mark svg {
  width: 15px;
  height: 15px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-cta {
  background: var(--brand);
  color: white !important;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  font-size: 0.88rem;
}

.nav-cta:hover {
  background: var(--brand-hover);
}

/* Hero */
.hero {
  padding: 4.25rem 0 3.25rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2.5rem;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--brand);
  background: var(--brand-soft);
  border: 1px solid #d6e4ff;
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2.1rem, 4vw, 3rem);
  line-height: 1.12;
  letter-spacing: -0.035em;
  margin-bottom: 1rem;
  max-width: 14ch;
}

.hero-lead {
  color: var(--text-muted);
  font-size: 1.08rem;
  max-width: 38ch;
  margin-bottom: 1.6rem;
}

.search-wrap {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0.4rem;
  box-shadow: var(--shadow);
}

.search-wrap input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  padding: 0.7rem 0.85rem;
  font-size: 0.98rem;
  color: var(--text);
  font-family: inherit;
}

.search-wrap input::placeholder {
  color: var(--text-faint);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: none;
  border-radius: 10px;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  padding: 0.75rem 1.1rem;
  transition: background 0.15s ease, transform 0.15s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--brand);
  color: white;
}

.btn-primary:hover {
  background: var(--brand-hover);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border-strong);
}

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

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0.35rem;
}

.hero-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.15rem;
  box-shadow: var(--shadow);
}

.hero-card h3 {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.stat {
  background: var(--surface-soft);
  border-radius: 10px;
  padding: 0.75rem 0.65rem;
  text-align: center;
}

.stat strong {
  display: block;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.stat span {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.mini-list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.mini-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0.65rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  font-size: 0.88rem;
}

.mini-item code {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text);
}

/* Section chrome */
.section {
  padding: 2.75rem 0;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.section-head h2 {
  font-size: 1.55rem;
  letter-spacing: -0.025em;
}

.section-head p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.chip {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
}

.chip.active,
.chip:hover {
  border-color: #b8ccff;
  background: var(--brand-soft);
  color: var(--brand);
}

/* Directory table */
.directory {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

th {
  text-align: left;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-faint);
  font-weight: 600;
  padding: 0.85rem 1rem;
  background: var(--surface-soft);
  border-bottom: 1px solid var(--border);
}

td {
  padding: 0.95rem 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
  vertical-align: middle;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: #fafbff;
}

tr.featured td {
  background: var(--featured);
}

tr.featured:hover td {
  background: #efe9ff;
}

.project {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.project strong {
  font-weight: 650;
  letter-spacing: -0.01em;
}

.project span {
  color: var(--text-faint);
  font-size: 0.8rem;
  font-family: var(--mono);
}

.eco {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  border-radius: 999px;
  padding: 0.25rem 0.6rem;
  font-size: 0.78rem;
  font-weight: 650;
  white-space:nowrap;
}

.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

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

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

.badge-signed {
  color: #5b21b6;
  background: #f3e8ff;
}

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

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

.featured-tag {
  display: inline-flex;
  margin-left: 0.45rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #6d28d9;
  background: #ede9fe;
  border: 1px solid var(--featured-border);
  border-radius: 999px;
  padding: 0.12rem 0.45rem;
  vertical-align: middle;
}

.muted {
  color: var(--text-muted);
  font-size: 0.86rem;
}

.table-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1rem;
  border-top: 1px solid var(--border);
  background: #fcfcfd;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* How it works */
.how {
  background: linear-gradient(180deg, transparent, #eef2f8 40%, transparent);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem;
  box-shadow: var(--shadow);
}

.step-num {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--brand-soft);
  color: var(--brand);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 0.85rem;
}

.step h3 {
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
  letter-spacing: -0.015em;
}

.step p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* Newsletter */
.newsletter {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.75rem;
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1.5rem;
  align-items: center;
}

.newsletter h2 {
  font-size: 1.45rem;
  letter-spacing: -0.025em;
  margin-bottom: 0.4rem;
}

.newsletter p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.signup {
  display: flex;
  gap: 0.5rem;
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.35rem;
}

.signup input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  padding: 0.7rem 0.75rem;
  font-family: inherit;
  font-size: 0.95rem;
}

.signup-note {
  margin-top: 0.55rem;
  font-size: 0.78rem;
  color: var(--text-faint);
}

/* Footer */
.footer {
  padding: 2.5rem 0 2rem;
  border-top: 1px solid var(--border);
  margin-top: 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 1.75rem;
}

.footer h4 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-faint);
  margin-bottom: 0.7rem;
}

.footer p,
.footer a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer a:hover {
  color: var(--text);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 1.1rem;
  border-top: 1px solid var(--border);
  color: var(--text-faint);
  font-size: 0.82rem;
}

@media (max-width: 900px) {
  .hero-grid,
  .newsletter,
  .footer-grid,
  .steps {
    grid-template-columns: 1fr;
  }

  .nav-links a:not(.nav-cta) {
    display: none;
  }

  .hero h1 {
    max-width: none;
  }

  .section-head {
    flex-direction: column;
    align-items: start;
  }
}