/* Biosphere — shared stylesheet */
:root{
  color-scheme:light;
  --bg:#F2F7FC; --surface:#FFFFFF; --surface-2:#F8FBFE;
  --ink:#0D2233; --ink-2:#1B3A52; --muted:#5B7590; --faint:#8CA6BD;
  --line:#DBE8F3; --line-2:#C7DBEC;
  --blue:#1E74C8; --blue-deep:#155A9E; --blue-soft:#E4F0FB; --sky:#CDE6FA;
  --wilds:#3E5AA8; --wilds-soft:#E7EAF9;
  --grove:#2E9B7A; --grove-soft:#DFF3EC;
  --radius:16px; --radius-sm:10px;
  --max:72rem;
  --shadow:0 1px 2px rgba(13,34,51,.04), 0 12px 32px rgba(13,34,51,.06);
  --shadow-lift:0 2px 4px rgba(13,34,51,.05), 0 20px 44px rgba(13,34,51,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;font-size:1rem;line-height:1.65;
  -webkit-font-smoothing:antialiased;font-feature-settings:"cv05","ss01"}
img{max-width:100%}
a{color:var(--blue-deep);text-underline-offset:.2em}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:4px}
h1,h2,h3{font-family:Outfit,Inter,system-ui,sans-serif;font-weight:600;letter-spacing:-.022em;margin:0}
.wrap{width:min(100% - 2.5rem,var(--max));margin-inline:auto}
.skip{position:absolute;left:1rem;top:.5rem;z-index:100;background:var(--surface);padding:.6rem 1rem;border-radius:var(--radius-sm);transform:translateY(-180%)}
.skip:focus{transform:none}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(242,247,252,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;gap:1rem 1.75rem;flex-wrap:wrap;min-height:4.25rem;padding-block:.6rem}
.wordmark{display:inline-flex;align-items:center;gap:.55rem;margin-right:auto;color:var(--ink);text-decoration:none;
  font-family:Outfit,sans-serif;font-weight:600;font-size:1.3rem;letter-spacing:-.02em}
.wordmark .dot{width:1.45rem;height:1.45rem;border-radius:50%;
  background:radial-gradient(circle at 32% 30%, #8FD3F4 0%, var(--blue) 55%, var(--wilds) 100%)}
.nav a.navlink{color:var(--ink-2);text-decoration:none;font-size:.925rem;font-weight:500;
  display:inline-flex;align-items:center;min-height:44px;padding-inline:.15rem}
.nav a.navlink:hover{color:var(--blue-deep)}
.nav a.navlink[aria-current="page"]{color:var(--blue-deep);box-shadow:inset 0 -2px 0 var(--blue)}

/* hero */
.hero{margin-top:2.5rem;padding:clamp(2rem,5vw,3.75rem);border-radius:var(--radius);
  background:linear-gradient(155deg,#FFFFFF 0%,var(--blue-soft) 48%,var(--sky) 100%);
  border:1px solid var(--line);box-shadow:var(--shadow)}
.eyebrow{margin:0 0 .9rem;color:var(--blue-deep);font-size:.78rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase}
h1{font-size:clamp(2.1rem,4.6vw,3.5rem);line-height:1.08;max-width:18ch}
.lede{max-width:44ch;margin:1.1rem 0 0;color:var(--ink-2);font-size:clamp(1rem,1.4vw,1.12rem)}
.hero.compact{background:linear-gradient(155deg,#FFFFFF 0%,var(--blue-soft) 100%)}
.hero.compact h1{font-size:clamp(1.9rem,3.6vw,2.7rem);max-width:22ch}

/* section scaffolding */
section{padding-block:3.5rem}
.section-top{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;flex-wrap:wrap;margin-bottom:1.6rem}
h2{font-size:clamp(1.35rem,2.4vw,1.75rem)}
.section-note{margin:0;color:var(--muted);font-size:.9rem}

/* world doors */
.worlds{display:grid;grid-template-columns:repeat(2,1fr);gap:1.25rem}
.world{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;text-decoration:none;color:inherit;box-shadow:var(--shadow);
  transition:transform .18s ease, box-shadow .18s ease}
.world:hover{transform:translateY(-3px);box-shadow:var(--shadow-lift)}
.world-band{height:8.5rem;position:relative;display:flex;align-items:flex-end;padding:1.1rem 1.35rem}
.world.wilds .world-band{background:linear-gradient(140deg,#2B3E7A 0%,var(--wilds) 60%,#6E7FC8 100%)}
.world.grove .world-band{background:linear-gradient(140deg,#1F7A5F 0%,var(--grove) 58%,#7CCBAE 100%)}
.world-band span{color:#fff;font-size:.72rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;opacity:.92}
.world-body{padding:1.35rem}
.world h3{font-size:1.5rem;margin-bottom:.35rem}
.world p{margin:0;color:var(--muted)}
.pill{display:inline-block;margin-top:1rem;padding:.24rem .7rem;border-radius:999px;font-size:.72rem;
  font-weight:600;letter-spacing:.06em;text-transform:uppercase}
.pill.soon{background:var(--blue-soft);color:var(--blue-deep)}
.pill.live{background:var(--grove-soft);color:#1C6B52}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:1.5rem}
.step{padding:1.25rem;background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius-sm)}
.step b{display:block;color:var(--blue);font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:.35rem}
.step p{margin:0;color:var(--ink-2);font-size:.95rem}

/* course + game cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.cards.two{grid-template-columns:repeat(2,1fr)}
.card{display:flex;flex-direction:column;padding:1.5rem;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);text-decoration:none;color:inherit;box-shadow:var(--shadow);
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease}
a.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lift);border-color:var(--line-2)}
.card .code{color:var(--blue);font-size:.78rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase}
.card h3{margin:.45rem 0 .4rem;font-size:1.2rem}
.card p{margin:0;color:var(--muted);font-size:.94rem}
.card .meta{margin-top:auto;padding-top:1rem;color:var(--faint);font-size:.78rem}
.card.quiet{background:var(--surface-2);box-shadow:none}

.button{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:46px;
  padding:.6rem 1.15rem;border-radius:999px;background:var(--blue);color:#fff;font-weight:600;
  font-size:.925rem;text-decoration:none;border:1px solid var(--blue);
  transition:transform .15s ease, box-shadow .15s ease, background .15s ease}
.button:hover{background:var(--blue-deep);transform:translateY(-1px);box-shadow:0 10px 22px rgba(30,116,200,.22)}
.button.ghost{background:transparent;color:var(--blue-deep)}
.button.ghost:hover{background:var(--blue-soft);box-shadow:none}
.card .button{align-self:flex-start;margin-top:1.15rem}

/* prose */
.prose{max-width:40rem}
.prose p{color:var(--ink-2)}
.prose h2{margin-top:2.5rem}
.prose h3{margin-top:1.75rem;font-size:1.1rem}
.prose ul{padding-left:1.15rem;color:var(--ink-2)}
.prose li{margin:.4rem 0}
.quiet-line{margin-top:3.5rem;padding-top:1.25rem;border-top:1px solid var(--line);color:var(--faint);font-size:.86rem}
.quiet-line a{color:var(--faint)}

/* roadmap */
.track{margin-top:1.5rem;border-top:1px solid var(--line)}
.track-row{display:grid;grid-template-columns:8.5rem 1fr;gap:1.25rem;padding:1.15rem 0;border-bottom:1px solid var(--line)}
.track-row .status{font-size:.74rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;padding-top:.15rem}
.status.now{color:var(--grove)} .status.next{color:var(--blue)} .status.later{color:var(--faint)}
.track-row h3{font-size:1.05rem;margin-bottom:.2rem}
.track-row p{margin:0;color:var(--muted);font-size:.94rem}

/* footer */
footer{margin-top:2rem;border-top:1px solid var(--line);background:var(--surface-2)}
.foot-in{display:flex;flex-wrap:wrap;gap:.75rem 1.5rem;align-items:center;padding-block:1.75rem}
.foot-links{display:flex;flex-wrap:wrap;gap:.75rem 1.25rem;margin-right:auto}
.foot-links a{color:var(--muted);text-decoration:none;font-size:.88rem}
.foot-links a:hover{color:var(--blue-deep)}
.rights{color:var(--faint);font-size:.72rem;letter-spacing:.01em}

@media (max-width:860px){
  .worlds,.steps,.cards,.cards.two{grid-template-columns:1fr}
  .track-row{grid-template-columns:1fr;gap:.3rem}
  .foot-links{margin-right:0;width:100%}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .world:hover,a.card:hover,.button:hover{transform:none}
}