:root{
  --gc-navy:#122a52;
  --gc-navy-2:#1a3a6b;
  --gc-teal:#0e7c8c;
  --gc-green:#5d9340;
  --gc-green-2:#7daf4a;
  --gc-gold:#c4a35a;
  --gc-gold-2:#e8d5a3;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body.land{
  min-height:100vh;
  min-height:100dvh;
  background:
    radial-gradient(ellipse 90% 50% at 50% 115%, rgba(190,220,255,.45) 0%, transparent 58%),
    radial-gradient(circle at 82% 14%, rgba(255,252,235,.55) 0 2px, rgba(255,248,220,.12) 18%, transparent 28%),
    linear-gradient(180deg, #071428 0%, #122a52 28%, #1e4d86 58%, #5b8ec4 82%, #9ec4e8 100%);
  color:#fff;
  font-family:"DM Sans","Noto Sans JP",system-ui,sans-serif;
  overflow:hidden;
}
.land-sky{
  position:fixed;
  inset:0;
  width:100%;
  height:100%;
  z-index:0;
  pointer-events:none;
}
.land-moon{
  position:fixed;
  top:9%;
  right:12%;
  width:72px;
  height:72px;
  border-radius:50%;
  background:
    radial-gradient(circle at 35% 32%, #fffdf4, #e8d5a3 55%, #c4a35a 100%);
  box-shadow:
    0 0 24px rgba(232,213,163,.65),
    0 0 70px rgba(158,196,232,.35);
  z-index:0;
  pointer-events:none;
}
.land-stage{
  position:relative;
  z-index:1;
  min-height:100vh;
  min-height:100dvh;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:clamp(36px,11vw,140px);
  padding:24px;
}

.land-btn{
  --ring:var(--gc-gold);
  --core:#122a52;
  --glow:rgba(196,163,90,.45);
  position:relative;
  width:min(48vw,280px);
  height:min(48vw,280px);
  min-width:168px;
  min-height:168px;
  display:grid;
  place-items:center;
  text-decoration:none;
  color:#fff;
  isolation:isolate;
}
.land-btn.co{
  --ring:var(--gc-gold);
  --core:#10284e;
  --glow:rgba(14,124,140,.5);
}
.land-btn.ca{
  --ring:var(--gc-green-2);
  --core:#1d3d22;
  --glow:rgba(93,147,64,.5);
}

.land-orbit{
  position:absolute;
  inset:0;
  border-radius:50%;
  border:1.5px dashed color-mix(in srgb, var(--ring) 75%, transparent);
  animation:spin 18s linear infinite;
  pointer-events:none;
}
.land-orbit.alt{
  inset:10px;
  border-style:solid;
  border-color:transparent;
  border-top-color:var(--ring);
  border-right-color:color-mix(in srgb, var(--gc-teal) 70%, transparent);
  animation-duration:9s;
  animation-direction:reverse;
  opacity:.85;
}
.land-btn.co .land-orbit.alt{
  border-top-color:var(--gc-gold);
  border-right-color:var(--gc-teal);
}
.land-btn.ca .land-orbit.alt{
  border-top-color:var(--gc-green-2);
  border-right-color:var(--gc-gold);
}

.land-core{
  position:relative;
  z-index:1;
  width:74%;
  height:74%;
  border-radius:50%;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:6px;
  text-align:center;
  padding:18px 14px;
  background:
    radial-gradient(circle at 32% 26%, rgba(255,255,255,.22), transparent 42%),
    radial-gradient(circle at 50% 55%, color-mix(in srgb, var(--core) 70%, #0e7c8c), #071018 78%);
  border:1px solid color-mix(in srgb, var(--ring) 55%, transparent);
  box-shadow:
    0 0 0 6px color-mix(in srgb, var(--core) 55%, transparent),
    0 12px 28px rgba(0,0,0,.35),
    inset 0 0 22px rgba(255,255,255,.06);
  transition:transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.land-mark{
  width:30px;
  height:30px;
  background-size:contain;
  background-repeat:no-repeat;
  background-position:center;
  filter:drop-shadow(0 0 10px rgba(196,163,90,.8));
  flex-shrink:0;
}
.land-label{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:4px;
  max-width:16ch;
}
.land-en{
  font-weight:700;
  font-size:clamp(10px,1.45vw,14px);
  letter-spacing:.06em;
  line-height:1.2;
  text-transform:uppercase;
  text-shadow:0 1px 8px rgba(0,0,0,.45);
}
.land-ja{
  font-family:"Noto Sans JP",sans-serif;
  font-weight:500;
  font-size:clamp(9px,1.15vw,12px);
  letter-spacing:.04em;
  line-height:1.35;
  color:var(--gc-gold-2);
  text-shadow:0 1px 8px rgba(0,0,0,.45);
}

.land-btn:hover .land-core,
.land-btn:focus-visible .land-core{
  transform:scale(1.06);
  border-color:#fff;
  box-shadow:
    0 0 0 7px color-mix(in srgb, var(--core) 40%, transparent),
    0 0 28px var(--glow),
    0 0 64px color-mix(in srgb, var(--ring) 45%, transparent),
    inset 0 0 24px rgba(255,255,255,.14);
}
.land-btn:hover .land-orbit,
.land-btn:focus-visible .land-orbit{
  animation-duration:4.5s;
  border-color:var(--ring);
}
.land-btn:focus-visible{outline:none}
.land-btn:active .land-core{transform:scale(1.02)}

@keyframes spin{
  to{transform:rotate(360deg)}
}

@media (max-width:520px){
  .land-stage{gap:18px}
  .land-btn{
    width:46vw;
    height:46vw;
  }
  .land-en{font-size:9px}
  .land-ja{font-size:8px}
  .land-mark{width:22px;height:22px}
  .land-moon{width:44px;height:44px;top:7%;right:8%}
}

@media (prefers-reduced-motion:reduce){
  .land-orbit,.land-orbit.alt{animation:none}
}