:root {
  --orbit-paper: #f3f3ee;
  --orbit-surface: #fbfbf8;
  --orbit-ink: #111318;
  --orbit-muted: #656b74;
  --orbit-line: #cfd1cc;
  --orbit-blue: #3b82f6;
  --orbit-blue-deep: #2563eb;
  --orbit-acid: #b9ff3e;
  --orbit-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

html,
html[data-theme="dark"] {
  color-scheme: light;
  background: var(--orbit-paper);
}

body {
  color: var(--orbit-ink);
  background-color: var(--orbit-paper);
  background-image:
    linear-gradient(rgba(17, 19, 24, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 19, 24, 0.045) 1px, transparent 1px);
  background-size: 40px 40px;
  font-family: "Helvetica Neue", Inter, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(circle at 78% 18%, rgba(59, 130, 246, 0.12), transparent 30rem);
}

a {
  color: var(--orbit-blue);
}

nav {
  height: 76px;
  padding: 0;
  background: rgba(251, 251, 248, 0.9);
  border-bottom: 1px solid var(--orbit-line);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

nav .container,
.nav-container {
  width: min(100% - 40px, 1280px);
  max-width: 1280px;
  height: 100%;
  padding: 0;
}

.nav-logo img,
nav .logo img {
  display: block;
  width: auto;
  height: 36px;
}

nav .logo {
  display: inline-flex;
  align-items: center;
  color: var(--orbit-blue);
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.06em;
}

.nav-back,
nav .nav-links a {
  color: var(--orbit-ink);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.nav-back:hover,
nav .nav-links a:hover {
  color: var(--orbit-blue);
}

.scroll-progress {
  height: 3px;
  background: var(--orbit-blue);
}

/* Privacy */
body.legal-page main {
  padding: 148px 0 96px;
}

body.legal-page > main > .container {
  width: min(100% - 40px, 980px);
  max-width: 980px;
  padding: 0;
}

.page-header {
  position: relative;
  margin: 0 0 56px;
  padding: 0 0 36px;
  border-bottom: 1px solid var(--orbit-ink);
}

.page-header::after {
  content: "LEGAL / 01";
  position: absolute;
  right: 0;
  top: 4px;
  color: var(--orbit-muted);
  font-family: var(--orbit-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
}

.page-kicker {
  margin-bottom: 20px;
  color: var(--orbit-blue);
  font-family: var(--orbit-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.page-title {
  max-width: 800px;
  margin-bottom: 20px;
  color: var(--orbit-ink);
  background: none;
  -webkit-background-clip: initial;
  -webkit-text-fill-color: currentColor;
  background-clip: initial;
  font-size: clamp(3rem, 8vw, 6.4rem);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: -0.07em;
}

.page-meta {
  color: var(--orbit-muted);
  font-family: var(--orbit-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
}

.legal-card {
  position: relative;
  margin-bottom: 16px;
  padding: 32px 36px 34px;
  color: var(--orbit-ink);
  background: rgba(251, 251, 248, 0.84);
  border: 1px solid var(--orbit-line);
  border-radius: 0;
  box-shadow: none;
}

.legal-card:hover {
  border-color: var(--orbit-blue);
}

.legal-card.highlight {
  background: rgba(59, 130, 246, 0.08);
  border-color: var(--orbit-blue);
}

.legal-card h2 {
  margin-bottom: 16px;
  color: var(--orbit-ink);
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.legal-card p,
.legal-card li {
  color: var(--orbit-muted);
}

body.legal-page footer {
  margin: 0;
  padding: 28px 0;
  color: var(--orbit-muted);
  background: var(--orbit-surface);
  border-top: 1px solid var(--orbit-line);
}

/* Proof-of-Hashing research page */
body.research-page main {
  margin-top: 76px;
}

body.research-page .container {
  width: min(100% - 40px, 1180px);
  max-width: 1180px;
  padding: 0;
}

body.research-page .hero {
  position: relative;
  min-height: 680px;
  display: flex;
  align-items: center;
  padding: 96px 0 88px;
  overflow: hidden;
  text-align: left;
  border-bottom: 1px solid var(--orbit-line);
}

body.research-page .hero::after {
  content: "";
  position: absolute;
  right: max(-150px, calc((100vw - 1180px) / 2 - 150px));
  top: 50%;
  width: min(47vw, 610px);
  aspect-ratio: 1;
  border: clamp(36px, 7vw, 90px) solid var(--orbit-blue);
  border-radius: 50%;
  transform: translateY(-50%);
  box-shadow:
    0 0 0 1px rgba(59, 130, 246, 0.35),
    inset 0 0 0 1px rgba(59, 130, 246, 0.35);
  pointer-events: none;
}

body.research-page .hero .container {
  position: relative;
  z-index: 1;
}

body.research-page .hero h1 {
  max-width: 760px;
  margin: 0 0 24px;
  color: var(--orbit-ink);
  background: none;
  -webkit-background-clip: initial;
  -webkit-text-fill-color: currentColor;
  background-clip: initial;
  font-size: clamp(4rem, 10vw, 8.8rem);
  font-weight: 700;
  line-height: 0.82;
  letter-spacing: -0.085em;
}

body.research-page .hero .subtitle {
  max-width: 650px;
  margin: 0 0 20px;
  color: var(--orbit-blue);
  font-family: var(--orbit-mono);
  font-size: clamp(0.85rem, 1.6vw, 1rem);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

body.research-page .hero .description {
  max-width: 610px;
  margin: 0 0 36px;
  color: var(--orbit-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

body.research-page .hero .cta-buttons {
  justify-content: flex-start;
}

.btn {
  min-height: 50px;
  padding: 0.85rem 1.35rem;
  border: 1px solid var(--orbit-blue);
  border-radius: 0;
  font-family: var(--orbit-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.btn-primary {
  color: #fff;
  background: var(--orbit-blue);
}

.btn-primary:hover {
  color: #fff;
  background: var(--orbit-blue-deep);
  box-shadow: none;
  transform: translateY(-2px);
}

.btn-secondary,
.btn-outline {
  color: var(--orbit-blue);
  background: transparent;
  border-color: var(--orbit-blue);
}

.btn-secondary:hover,
.btn-outline:hover {
  color: #fff;
  background: var(--orbit-blue);
}

.section {
  padding: 104px 0;
  border-bottom: 1px solid var(--orbit-line);
}

.section:nth-of-type(even) {
  background: rgba(251, 251, 248, 0.68);
}

.section-title {
  max-width: 820px;
  margin-bottom: 20px;
  color: var(--orbit-ink);
  font-size: clamp(2.7rem, 6vw, 5.8rem);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: -0.065em;
}

.section-subtitle {
  max-width: 720px;
  margin-bottom: 48px;
  color: var(--orbit-muted);
  font-size: 1.05rem;
}

.grid {
  gap: 1px;
  margin-top: 48px;
  background: var(--orbit-line);
  border: 1px solid var(--orbit-line);
}

.card {
  height: 100%;
  margin: 0;
  padding: 34px;
  color: var(--orbit-ink);
  background: var(--orbit-surface);
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.card:hover {
  border-color: transparent;
  box-shadow: none;
  transform: none;
}

.card h3 {
  color: var(--orbit-ink);
  font-size: 1.65rem;
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.card p,
.card ul li {
  color: var(--orbit-muted);
}

.card ul li::before {
  content: "↗";
  color: var(--orbit-blue);
}

.code-block {
  padding: 24px;
  color: #fff;
  background: var(--orbit-ink);
  border: 0;
  border-radius: 0;
}

.code-block code {
  color: #e9edff;
  font-family: var(--orbit-mono);
}

.comparison-table {
  color: var(--orbit-ink);
  background: var(--orbit-surface);
  border: 1px solid var(--orbit-line);
  border-radius: 0;
}

.comparison-table thead {
  background: var(--orbit-blue);
}

.comparison-table th {
  color: #fff;
  border-color: var(--orbit-blue-deep);
}

.comparison-table td {
  color: var(--orbit-muted);
  border-color: var(--orbit-line);
}

.comparison-table tr:hover {
  background: rgba(59, 130, 246, 0.06);
}

.highlight {
  color: var(--orbit-blue);
  background: rgba(59, 130, 246, 0.08);
}

.paper-section {
  margin: 48px 0 0;
  padding: clamp(32px, 7vw, 72px);
  color: #fff;
  background: var(--orbit-blue);
  border: 0;
  border-radius: 0;
}

.paper-section .section-title,
.paper-section .section-subtitle,
.paper-section a {
  color: #fff;
}

.paper-info {
  gap: 1px;
  background: rgba(255, 255, 255, 0.3);
}

.paper-info-item {
  padding: 24px;
  color: #fff;
  background: rgba(9, 32, 139, 0.34);
  border: 0;
  border-radius: 0;
}

.paper-info-item h4,
.paper-info-item p {
  color: #fff;
}

.badge {
  color: var(--orbit-ink);
  background: var(--orbit-acid);
  border-radius: 999px;
  font-family: var(--orbit-mono);
}

.badge-success,
.badge-warning {
  color: var(--orbit-ink);
  background: var(--orbit-acid);
}

body.research-page footer {
  margin-top: 0;
  padding: 54px 0;
  color: var(--orbit-muted);
  background: var(--orbit-ink);
  border-top: 0;
}

body.research-page footer p {
  color: #aeb3bd;
}

body.research-page footer a {
  color: #fff;
}

@media (max-width: 800px) {
  nav .container,
  .nav-container,
  body.legal-page > main > .container,
  body.research-page .container {
    width: min(100% - 28px, 1180px);
  }

  nav .nav-links {
    display: none;
  }

  .nav-actions {
    gap: 8px;
  }

  .nav-back span {
    display: none;
  }

  body.legal-page main {
    padding-top: 124px;
  }

  .page-header::after {
    display: none;
  }

  .legal-card {
    padding: 24px;
  }

  body.research-page .hero {
    min-height: 620px;
    padding: 76px 0 60px;
  }

  body.research-page .hero::after {
    right: -36vw;
    top: 22%;
    width: 80vw;
    opacity: 0.18;
  }

  .section {
    padding: 72px 0;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  .comparison-table {
    display: block;
    overflow-x: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}