:root {
  --midnight: #071923;
  --deep-lab: #0b2231;
  --graphite: #173746;
  --ink: #15313b;
  --muted: #58727b;
  --glass: #eef9f8;
  --paper: #f8fcfa;
  --white: #ffffff;
  --cyan: #23b8d1;
  --cyan-dark: #087d98;
  --coral: #ff725f;
  --lime: #b5e875;
  --line: #cce0df;
  --shadow: 0 24px 70px rgba(7, 25, 35, 0.14);
  color-scheme: light;
  font-family: "Avenir Next", Avenir, "Segoe UI", Helvetica, Arial, sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    linear-gradient(rgba(8, 125, 152, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(8, 125, 152, 0.045) 1px, transparent 1px),
    var(--paper);
  background-size: 32px 32px;
  line-height: 1.6;
}

a { color: inherit; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: var(--white);
  background: var(--midnight);
  border-radius: 8px;
  transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0); }

.site-header,
main,
footer {
  width: min(1160px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 92px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--midnight);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 34px;
  aspect-ratio: 1;
  place-items: center;
  color: var(--white);
  background: var(--deep-lab);
  border-radius: 9px 9px 3px 9px;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  letter-spacing: 0;
}

nav { display: flex; gap: 26px; }

nav a {
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

nav a:hover { color: var(--cyan-dark); }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  gap: clamp(48px, 8vw, 110px);
  align-items: center;
  min-height: 690px;
  padding: 76px 0 86px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan-dark);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 7px;
  background: var(--lime);
  border: 2px solid var(--graphite);
  border-radius: 50%;
}

h1,
h2,
h3 {
  margin-top: 0;
  color: var(--midnight);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

h1 {
  max-width: 780px;
  margin-bottom: 26px;
  font-size: clamp(3.35rem, 7.7vw, 6.85rem);
  font-weight: 850;
}

h1 span {
  color: var(--cyan-dark);
  text-decoration: underline;
  text-decoration-color: var(--coral);
  text-decoration-thickness: 0.11em;
  text-underline-offset: 0.08em;
}

h2 { font-size: clamp(2.1rem, 5vw, 4.25rem); }
h3 { font-size: clamp(1.35rem, 3vw, 2rem); }

.lede {
  max-width: 650px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.04rem, 2vw, 1.25rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border: 1px solid var(--deep-lab);
  border-radius: 12px 12px 4px 12px;
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.button-primary {
  color: var(--white);
  background: var(--deep-lab);
  box-shadow: 6px 6px 0 var(--cyan);
}

.button-primary:hover { transform: translate(-1px, -1px); }

.button-quiet { background: rgba(255, 255, 255, 0.72); }

.reaction-stage {
  position: relative;
  display: grid;
  width: min(100%, 450px);
  aspect-ratio: 1;
  place-items: center;
  justify-self: center;
}

.element-card {
  position: relative;
  z-index: 3;
  display: grid;
  width: clamp(210px, 29vw, 300px);
  aspect-ratio: 1;
  padding: 22px;
  align-content: center;
  color: var(--white);
  background: var(--deep-lab);
  border: 2px solid var(--cyan);
  border-radius: 34px 34px 9px 34px;
  box-shadow: 16px 18px 0 rgba(35, 184, 209, 0.18), var(--shadow);
  transform: rotate(-4deg);
}

.element-card strong {
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: clamp(5.6rem, 13vw, 9rem);
  line-height: 0.9;
  letter-spacing: -0.12em;
}

.element-number {
  position: absolute;
  top: 18px;
  right: 20px;
  color: var(--lime);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-weight: 800;
}

.element-name {
  margin-top: 17px;
  font-size: 0.9rem;
  font-weight: 750;
  letter-spacing: 0.04em;
}

.element-state {
  margin-top: 4px;
  color: #99c9d2;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
}

.orbit {
  position: absolute;
  border: 1px solid rgba(8, 125, 152, 0.38);
  border-radius: 50%;
}

.orbit::after {
  position: absolute;
  width: 12px;
  height: 12px;
  content: "";
  background: var(--cyan-dark);
  border: 4px solid var(--paper);
  border-radius: 50%;
}

.orbit-one {
  width: 96%;
  height: 54%;
  transform: rotate(38deg);
  animation: drift-one 12s ease-in-out infinite alternate;
}

.orbit-one::after { top: 10%; left: 8%; }

.orbit-two {
  width: 88%;
  height: 45%;
  transform: rotate(-38deg);
  animation: drift-two 14s ease-in-out infinite alternate;
}

.orbit-two::after { right: 13%; bottom: 2%; background: var(--coral); }

.atom {
  position: absolute;
  z-index: 4;
  width: 22px;
  aspect-ratio: 1;
  border: 5px solid var(--paper);
  border-radius: 50%;
  box-shadow: 0 8px 22px rgba(7, 25, 35, 0.18);
}

.atom-cyan { top: 13%; right: 21%; background: var(--cyan); }
.atom-coral { bottom: 17%; left: 12%; width: 29px; background: var(--coral); }
.atom-lime { right: 6%; bottom: 29%; width: 17px; background: var(--lime); }

.game-panel {
  position: relative;
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr) minmax(210px, 0.55fr);
  gap: clamp(24px, 5vw, 60px);
  align-items: center;
  margin-bottom: 28px;
  padding: clamp(28px, 6vw, 64px);
  overflow: hidden;
  color: #d8edf1;
  background: var(--deep-lab);
  border-radius: 28px 28px 8px 28px;
  box-shadow: var(--shadow);
}

.panel-index {
  color: var(--lime);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  font-weight: 800;
  letter-spacing: -0.08em;
}

.game-panel h2 { margin-bottom: 18px; color: var(--white); }
.game-panel p { margin: 0; }

.facts {
  display: grid;
  gap: 12px;
  margin: 0;
}

.facts div {
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.facts dt {
  color: #88b8c2;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.facts dd { margin: 2px 0 0; color: var(--white); font-weight: 700; }

.link-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding: 20px 0 90px;
}

.link-card {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  gap: 14px;
  align-items: center;
  min-height: 126px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line);
  border-radius: 18px 18px 5px 18px;
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.link-card:hover {
  border-color: var(--cyan);
  box-shadow: 0 15px 40px rgba(7, 25, 35, 0.08);
  transform: translateY(-3px);
}

.link-card strong { display: block; margin-bottom: 4px; }
.link-card small { display: block; color: var(--muted); line-height: 1.45; }

.card-symbol {
  display: grid;
  width: 46px;
  aspect-ratio: 1;
  place-items: center;
  color: var(--white);
  background: var(--cyan-dark);
  border-radius: 12px 12px 3px 12px;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-weight: 800;
}

.card-symbol.coral { background: var(--coral); }
.card-symbol.lime { color: var(--midnight); background: var(--lime); }
.arrow { color: var(--cyan-dark); font-size: 1.35rem; }

footer {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding: 28px 0 44px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
}

footer p { margin: 0; }

/* Policy and support pages */
.page-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 250px;
  gap: clamp(38px, 7vw, 90px);
  align-items: start;
  padding: 72px 0 100px;
}

.page-title { margin-bottom: 48px; }

.page-title h1 {
  max-width: 900px;
  margin-bottom: 18px;
  font-size: clamp(3rem, 8vw, 6.3rem);
}

.page-title .lede { max-width: 760px; }

.policy-content {
  padding: clamp(24px, 5vw, 56px);
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--line);
  border-radius: 24px 24px 7px 24px;
  box-shadow: 0 20px 55px rgba(7, 25, 35, 0.08);
}

.policy-content section + section {
  margin-top: 44px;
  padding-top: 38px;
  border-top: 1px solid var(--line);
}

.policy-content h2 {
  margin-bottom: 18px;
  font-size: clamp(1.6rem, 3vw, 2.35rem);
  letter-spacing: -0.025em;
}

.policy-content h3 {
  margin: 28px 0 10px;
  font-size: 1.12rem;
  letter-spacing: -0.01em;
}

.policy-content p,
.policy-content li { color: #3d5b64; }
.policy-content ul { padding-left: 1.25rem; }
.policy-content li + li { margin-top: 8px; }
.policy-content a { color: var(--cyan-dark); font-weight: 700; }

.notice {
  margin: 28px 0;
  padding: 18px 20px;
  color: var(--ink);
  background: #e7f6f7;
  border-left: 5px solid var(--cyan);
  border-radius: 4px 12px 12px 4px;
}

.page-nav {
  position: sticky;
  top: 24px;
  padding: 20px;
  background: var(--deep-lab);
  border-radius: 18px 18px 5px 18px;
}

.page-nav strong {
  display: block;
  margin-bottom: 14px;
  color: var(--lime);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.page-nav a {
  display: block;
  padding: 8px 0;
  color: #d6ebef;
  font-size: 0.88rem;
  text-decoration: none;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.contact-block {
  padding: 24px;
  background: var(--deep-lab);
  color: #d7ecf0;
  border-radius: 18px 18px 5px 18px;
}

.contact-block h2 { color: var(--white); }
.contact-block a { color: var(--lime); }

.faq-item + .faq-item { margin-top: 30px; }
.faq-item h3 { margin-bottom: 7px; }

:focus-visible {
  outline: 3px solid var(--coral);
  outline-offset: 4px;
}

@keyframes drift-one {
  from { transform: rotate(34deg) scale(0.98); }
  to { transform: rotate(43deg) scale(1.02); }
}

@keyframes drift-two {
  from { transform: rotate(-42deg) scale(1.02); }
  to { transform: rotate(-34deg) scale(0.97); }
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 62px;
  }

  .reaction-stage { width: min(100%, 390px); }
  .game-panel { grid-template-columns: 110px 1fr; }
  .facts { grid-column: 1 / -1; grid-template-columns: repeat(3, 1fr); }
  .link-grid { grid-template-columns: 1fr; }
  .page-shell { grid-template-columns: 1fr; }
  .page-nav { position: static; order: -1; }
}

@media (max-width: 600px) {
  .site-header,
  main,
  footer { width: min(100% - 28px, 1160px); }

  .site-header { min-height: 76px; }
  nav { gap: 15px; }
  nav a { font-size: 0.72rem; }
  .hero { gap: 30px; padding: 50px 0 60px; }
  .reaction-stage { width: min(92vw, 340px); }
  .game-panel { grid-template-columns: 1fr; }
  .panel-index { font-size: 3rem; }
  .facts { grid-column: auto; grid-template-columns: 1fr; }
  .link-card { grid-template-columns: 44px 1fr auto; }
  footer { flex-direction: column; }
  .page-shell { padding-top: 48px; }
  .policy-content { padding: 24px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}