/* HashSeal public site — single stylesheet, system fonts, dark product UI */

:root {
  --bg: #0b0e14;
  --bg-elev: #121821;
  --bg-soft: #1a2332;
  --border: #2a3548;
  --text: #e7ecf3;
  --muted: #8b9bb4;
  --faint: #5c6b82;
  --seal: #5b9fd4;
  --seal-hi: #7eb8e8;
  --circlet: #f5a524;
  --ok: #3dd68c;
  --bad: #f07178;
  --max: 52rem;
  --font: system-ui, "Segoe UI", sans-serif;
  --mono: ui-monospace, "Cascadia Code", Consolas, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  display: flex;
  flex-direction: column;
}

a {
  color: var(--seal-hi);
  text-decoration: none;
}

a:hover {
  color: var(--circlet);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--circlet);
  outline-offset: 2px;
}

/* Header */

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(11, 14, 20, 0.92);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header__inner {
  max-width: calc(var(--max) + 8rem);
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 650;
  letter-spacing: 0.02em;
}

.brand:hover {
  color: var(--text);
  text-decoration: none;
}

.brand__mark {
  width: 1.75rem;
  height: 1.75rem;
  display: block;
  flex-shrink: 0;
}

.brand__name {
  font-size: 1.05rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  align-items: center;
  font-size: 0.92rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
}

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

.nav a[aria-current="page"] {
  color: var(--text);
  box-shadow: inset 0 -2px 0 var(--circlet);
}

.nav__ext {
  color: var(--seal-hi) !important;
}

/* Main */

.site-main {
  flex: 1;
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.25rem 3.5rem;
}

/* Hero (home) */

.hero {
  text-align: center;
  padding: 1.5rem 0 2.25rem;
}

.hero__mark {
  width: 5.5rem;
  height: 5.5rem;
  margin: 0 auto 1.25rem;
  display: block;
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.hero__tagline {
  margin: 0 0 0.75rem;
  color: var(--circlet);
  font-size: 1.05rem;
  font-weight: 500;
}

.hero__lead {
  margin: 0 auto 1.5rem;
  max-width: 36rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.hero__verified {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-elev);
  color: var(--muted);
  font-size: 0.85rem;
}

.hero__verified img {
  width: 1.25rem;
  height: 1.25rem;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.15rem;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
}

.btn:hover {
  text-decoration: none;
}

.btn--primary {
  background: var(--seal);
  color: #0b0e14;
  border-color: var(--seal);
}

.btn--primary:hover {
  background: var(--seal-hi);
  color: #0b0e14;
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn--ghost:hover {
  border-color: var(--seal);
  color: var(--seal-hi);
}

/* Cards / grids */

.grid-2 {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.15rem 1.25rem;
}

.card h2,
.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.card .lead-label {
  display: inline-block;
  margin-bottom: 0.4rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--circlet);
}

.card--lead {
  border-color: rgba(91, 159, 212, 0.45);
}

/* Sections */

.section {
  margin: 2.25rem 0;
}

.section > h2 {
  margin: 0 0 1rem;
  font-size: 1.25rem;
  font-weight: 650;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
  display: grid;
  gap: 0.75rem;
}

.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.75rem;
  align-items: start;
  padding: 0.85rem 1rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.steps li::before {
  content: counter(step);
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  background: var(--bg-soft);
  border: 1px solid var(--seal-dim, #3a6f9a);
  color: var(--seal-hi);
  font-size: 0.85rem;
  font-weight: 650;
  display: flex;
  align-items: center;
  justify-content: center;
}

.steps strong {
  display: block;
  margin-bottom: 0.15rem;
}

.steps span {
  color: var(--muted);
  font-size: 0.92rem;
}

/* Prose (docs pages) */

.prose h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.25;
}

.prose h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.25rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.35rem;
}

.prose h3 {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.05rem;
}

.prose p,
.prose li {
  color: var(--text);
}

.prose p {
  margin: 0 0 1rem;
}

.prose ul,
.prose ol {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

.prose li + li {
  margin-top: 0.3rem;
}

.prose blockquote {
  margin: 1rem 0;
  padding: 0.5rem 0 0.5rem 1rem;
  border-left: 3px solid var(--circlet);
  color: var(--muted);
}

.prose hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1.25rem;
  font-size: 0.92rem;
}

.prose th,
.prose td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.65rem;
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--bg-elev);
  color: var(--muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.prose tr:nth-child(even) td {
  background: rgba(18, 24, 33, 0.5);
}

/* Code */

pre,
code {
  font-family: var(--mono);
}

code {
  font-size: 0.88em;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1em 0.35em;
}

pre {
  margin: 0 0 1.25rem;
  padding: 0.9rem 1rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.5;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: inherit;
  color: var(--text);
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 1.25rem 2rem;
  margin-top: auto;
}

.site-footer__inner {
  max-width: calc(var(--max) + 8rem);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  font-size: 0.9rem;
}

.site-footer__links a {
  color: var(--muted);
}

.site-footer__whisper {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--faint);
}

.site-footer__whisper a {
  color: var(--faint);
}

.site-footer__whisper a:hover {
  color: var(--circlet);
}

/* Utility */

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

.center {
  text-align: center;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--seal);
  color: #0b0e14;
  padding: 0.5rem 1rem;
  z-index: 100;
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
}