:root {
  color-scheme: light dark;
  --background: #f7f8f3;
  --surface: #ffffff;
  --surface-subtle: #dceae7;
  --ink: #102a2e;
  --ink-soft: #456065;
  --ink-faint: #637579;
  --line: #d7e1dc;
  --accent: #2c6e73;
  --accent-strong: #1d5055;
  --action: #b4473d;
  --on-accent: #ffffff;
  --shadow: 0 18px 55px rgba(16, 42, 46, 0.1);
  --page-width: 1120px;
  --copy-width: 760px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(rgba(44, 110, 115, 0.045) 1px, transparent 1px) 0 0 / 100%
    32px,
    var(--background);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 17px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent-strong);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 0.08em;
}

a:hover {
  color: var(--action);
}

a:focus-visible {
  border-radius: 4px;
  outline: 3px solid var(--action);
  outline-offset: 4px;
}

.site-header {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--page-width);
  padding: 24px;
}

.brand {
  align-items: center;
  color: var(--ink);
  display: inline-flex;
  font-weight: 800;
  gap: 11px;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand-mark {
  background-color: #071316;
  background-image: url("/favicon.svg");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  border-radius: 10px;
  box-shadow: 0 5px 16px rgba(16, 42, 46, 0.16);
  display: inline-flex;
  flex: 0 0 auto;
  height: 40px;
  width: 40px;
}

.brand:hover {
  color: var(--ink);
}

.site-nav {
  align-items: center;
  display: flex;
  font-size: 14px;
  font-weight: 700;
  gap: 24px;
}

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--action);
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

main {
  margin: 0 auto;
  max-width: var(--page-width);
  padding: 48px 24px 96px;
}

.hero {
  align-items: end;
  display: grid;
  gap: 72px;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  min-height: 66vh;
  padding: 56px 0 72px;
}

.eyebrow {
  color: var(--accent-strong);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  margin: 0 0 20px;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  color: var(--ink);
  letter-spacing: -0.035em;
  line-height: 1.12;
}

h1 {
  font-size: clamp(2.75rem, 7vw, 5.75rem);
  margin: 0;
  max-width: 900px;
}

.document-title {
  font-size: clamp(2.55rem, 6vw, 4.8rem);
  max-width: var(--copy-width);
}

h2 {
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  margin: 64px 0 16px;
}

h3 {
  font-size: 1.05rem;
  letter-spacing: -0.015em;
  margin: 28px 0 8px;
}

.lede {
  color: var(--ink-soft);
  font-size: clamp(1.12rem, 2vw, 1.35rem);
  line-height: 1.55;
  margin: 28px 0 0;
  max-width: 680px;
}

.fact-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
}

.fact-list li {
  background: var(--surface-subtle);
  border-radius: 999px;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 800;
  padding: 8px 13px;
}

.hero-cta {
  margin-top: 36px;
}

.play-badge {
  align-items: center;
  background: #0b191c;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(16, 42, 46, 0.18);
  color: #ffffff;
  display: inline-flex;
  gap: 14px;
  padding: 11px 22px;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.play-badge:hover {
  background: #152d32;
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: 0 12px 32px rgba(16, 42, 46, 0.28);
  color: #ffffff;
  transform: translateY(-2px);
}

.play-badge-icon {
  flex-shrink: 0;
  height: 28px;
  width: 28px;
}

.play-badge-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  text-align: left;
}

.play-badge-caption {
  color: #9eb8b4;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.play-badge-store {
  color: #ffffff;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.015em;
}

.nav-play-link {
  align-items: center;
  background: var(--surface-subtle);
  border-radius: 999px;
  color: var(--accent-strong) !important;
  display: inline-flex;
  font-size: 13px !important;
  font-weight: 800;
  gap: 4px;
  padding: 6px 14px;
  text-decoration: none !important;
  transition: background 0.15s ease;
}

.nav-play-link:hover {
  background: var(--line);
}

.download-banner {
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: space-between;
  margin: 64px 0 32px;
  padding: 40px;
}

.download-banner h2 {
  margin: 0 0 12px;
}

.download-lede {
  color: var(--ink-soft);
  font-size: 16px;
  margin: 0;
  max-width: 520px;
}

.ledger {
  background: var(--ink);
  border-radius: 24px;
  box-shadow: var(--shadow);
  color: #eff7f4;
  overflow: hidden;
}

.ledger-header {
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  justify-content: space-between;
  padding: 18px 20px;
}

.ledger-title,
.ledger-stamp {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.ledger-stamp {
  color: #9ed0c8;
}

.ledger-row {
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.11);
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr auto;
  padding: 20px;
}

.ledger-row:last-child {
  border-bottom: 0;
}

.ledger-row span {
  color: #b8ceca;
  font-size: 14px;
}

.ledger-row strong {
  color: #ffffff;
  font-size: 14px;
  text-align: right;
}

.ledger-row strong::before {
  color: #8dd1a8;
  content: "●";
  font-size: 9px;
  margin-right: 8px;
  vertical-align: 1px;
}

.home-links {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding-top: 40px;
}

.features {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 56px;
  grid-template-columns: minmax(240px, 0.72fr) minmax(0, 1.28fr);
  padding: 80px 0;
}

.feature-intro {
  align-self: start;
  position: sticky;
  top: 36px;
}

.feature-intro h2 {
  margin: 0;
}

.feature-intro > p:last-child {
  color: var(--ink-soft);
  margin: 18px 0 0;
  max-width: 420px;
}

.feature-grid {
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feature-item {
  border-bottom: 1px solid var(--line);
  min-height: 230px;
  padding: 28px 28px 30px 0;
}

.feature-item:nth-child(even) {
  border-left: 1px solid var(--line);
  padding-left: 28px;
}

.feature-tag {
  color: var(--accent-strong);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.feature-item h3 {
  font-size: 1.35rem;
  margin: 18px 0 10px;
}

.feature-item p {
  color: var(--ink-soft);
  font-size: 15px;
  margin: 0;
}

.home-link {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  color: var(--ink);
  padding: 24px;
  text-decoration: none;
}

.home-link:hover {
  border-color: var(--accent);
  color: var(--ink);
}

.home-link strong {
  display: block;
  font-size: 18px;
  margin-bottom: 4px;
}

.home-link span {
  color: var(--ink-soft);
  font-size: 14px;
}

.document {
  max-width: var(--copy-width);
}

.document-header {
  border-bottom: 1px solid var(--line);
  padding: 56px 0 44px;
}

.updated {
  color: var(--ink-faint);
  font-size: 14px;
  margin-top: 20px;
}

.summary {
  background: var(--surface-subtle);
  border-left: 4px solid var(--accent);
  border-radius: 0 14px 14px 0;
  margin: 40px 0 48px;
  padding: 24px 28px;
}

.summary p {
  margin: 0;
}

.document p,
.document li {
  color: var(--ink-soft);
}

.document strong {
  color: var(--ink);
}

.document ul {
  padding-left: 1.25rem;
}

.document li + li {
  margin-top: 8px;
}

.contact-box {
  background: var(--ink);
  border-radius: 20px;
  color: #eff7f4;
  margin-top: 56px;
  padding: 30px;
}

.contact-box h2 {
  color: #ffffff;
  margin: 0 0 12px;
}

.contact-box p {
  color: #b8ceca;
}

.contact-box a {
  color: #a9ddd4;
  overflow-wrap: anywhere;
}

.button-link {
  background: var(--action);
  border-radius: 12px;
  color: #ffffff;
  display: inline-block;
  font-weight: 800;
  margin-top: 10px;
  padding: 12px 18px;
  text-decoration: none;
}

.button-link:hover {
  background: #8f372f;
  color: #ffffff;
}

.support-grid {
  display: grid;
  gap: 22px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 42px;
}

.support-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px;
}

.support-card h2 {
  font-size: 1.25rem;
  margin: 0 0 10px;
}

.support-card p,
.support-card ul {
  color: var(--ink-soft);
  font-size: 15px;
  margin-bottom: 0;
}

.site-footer {
  align-items: center;
  border-top: 1px solid var(--line);
  color: var(--ink-faint);
  display: flex;
  font-size: 13px;
  gap: 20px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--page-width);
  padding: 28px 24px 40px;
}

.footer-links {
  display: flex;
  gap: 18px;
}

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
  }

  .site-nav {
    gap: 14px;
  }

  .hero {
    gap: 44px;
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 36px 0 64px;
  }

  .features {
    gap: 36px;
    grid-template-columns: 1fr;
    padding: 64px 0;
  }

  .feature-intro {
    position: static;
  }

  .home-links,
  .support-grid {
    grid-template-columns: 1fr;
  }

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

  .feature-item,
  .feature-item:nth-child(even) {
    border-left: 0;
    min-height: 0;
    padding: 24px 0;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 16px;
  }

  .site-header,
  main,
  .site-footer {
    padding-left: 18px;
    padding-right: 18px;
  }

  .contact-box {
    padding: 24px;
  }

  .contact-box a {
    font-size: 14px;
    overflow-wrap: break-word;
  }

  .brand-mark {
    height: 36px;
    width: 36px;
  }

  .site-nav {
    font-size: 13px;
  }

  .site-nav a:first-child {
    display: none;
  }

  .ledger-row {
    gap: 10px;
    padding: 18px;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #0b191c;
    --surface: #14272b;
    --surface-subtle: #1d383c;
    --ink: #f2f6f3;
    --ink-soft: #b6c7c3;
    --ink-faint: #91a49f;
    --line: #294044;
    --accent: #83c7c1;
    --accent-strong: #9ed8d2;
    --action: #f18878;
    --shadow: 0 18px 55px rgba(0, 0, 0, 0.22);
  }

  .brand-mark,
  .ledger,
  .contact-box {
    background-color: #071316;
  }

  .play-badge {
    background: #071316;
    border-color: rgba(255, 255, 255, 0.12);
  }

  .play-badge:hover {
    background: #0f252a;
    border-color: rgba(255, 255, 255, 0.25);
  }

  .download-banner {
    background: var(--surface);
    border-color: var(--line);
  }

  .button-link {
    color: #0b191c;
  }

  .button-link:hover {
    background: #ffd0c7;
    color: #0b191c;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}