:root {
  --ink: #e9f5ff;
  --muted: #a9c0d2;
  --navy: #11192a;
  --navy-strong: #07101f;
  --blue: #80d1ff;
  --mint: #a6ebcf;
  --sun: #ffe38c;
  --panel: rgba(10, 23, 42, 0.78);
  --line: rgba(190, 225, 250, 0.24);
  --sans: "BIZ UDPGothic", "Hiragino Sans", "Yu Gothic UI", sans-serif;
  --serif: "Yu Mincho", "Hiragino Mincho ProN", Georgia, serif;
}

* { box-sizing: border-box; }

html,
body { min-height: 100%; }

body {
  margin: 0;
  overflow-x: hidden;
  overflow-y: auto;
  color: var(--ink);
  background: var(--navy-strong);
  font-family: var(--sans);
  line-height: 1.7;
}

button,
a { font: inherit; }

a { color: inherit; }

#world {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: none;
  outline: none;
}

body.webgl-ready { overflow: hidden; }
body.webgl-ready #world { display: block; }

.skip-link {
  position: fixed;
  z-index: 30;
  top: 12px;
  left: 12px;
  padding: 9px 14px;
  border-radius: 999px;
  color: var(--navy-strong);
  background: white;
  transform: translateY(-160%);
}

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

.world-ui {
  position: fixed;
  z-index: 2;
  inset: 0;
  display: grid;
  grid-template-rows: auto 1fr;
  pointer-events: none;
}

.world-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px clamp(18px, 3vw, 42px);
}

.back-link,
.world-header p,
.welcome-card,
.world-directory,
.interaction-prompt,
.world-status { pointer-events: auto; }

.back-link {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  background: rgba(7, 16, 31, 0.55);
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
  backdrop-filter: blur(12px);
}

.back-link:hover,
.back-link:focus-visible { border-color: var(--blue); background: rgba(17, 25, 42, 0.92); }

.world-header p { margin: 0; color: var(--muted); font-size: 10px; font-weight: 800; letter-spacing: 0.16em; }
.world-header p span { margin-left: 8px; color: var(--mint); }

.world-main { position: relative; min-height: 0; }

.welcome-card {
  position: absolute;
  top: clamp(22px, 7vh, 90px);
  left: clamp(18px, 6vw, 92px);
  width: min(440px, calc(100vw - 36px));
  padding: clamp(24px, 3vw, 38px);
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(145deg, rgba(16, 35, 61, 0.88), rgba(7, 16, 31, 0.7));
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.32);
  backdrop-filter: blur(18px);
  transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
}

.welcome-card.is-minimized { opacity: 0; visibility: hidden; transform: translateY(-10px); pointer-events: none; }

.eyebrow { margin: 0 0 10px; color: var(--mint); font-size: 10px; font-weight: 900; letter-spacing: 0.16em; }

h1,
h2 { margin: 0; font-family: var(--serif); font-weight: 600; letter-spacing: 0.02em; }

h1 { font-size: clamp(32px, 4.6vw, 54px); line-height: 1.24; }
h1 span { color: var(--blue); }

.welcome-card > p:not(.eyebrow):not(.controls) { margin: 19px 0 0; color: var(--muted); font-size: 14px; }

.enter-button {
  min-height: 48px;
  margin-top: 24px;
  padding: 11px 18px;
  border: 1px solid rgba(128, 209, 255, 0.5);
  border-radius: 999px;
  color: var(--navy-strong);
  background: var(--blue);
  font-weight: 900;
  cursor: pointer;
  box-shadow: 0 10px 28px rgba(98, 188, 240, 0.24);
}

.enter-button:hover,
.enter-button:focus-visible { background: #b4e4ff; transform: translateY(-1px); }

.start-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.start-actions .enter-button { margin-top: 0; text-decoration: none; text-align: center; }
.enter-button.secondary { color: var(--ink); background: rgba(233, 245, 255, 0.08); }
.support-message { font-size: 12px !important; }

.controls { margin: 15px 0 0; color: var(--muted); font-size: 11px; }

kbd {
  display: inline-grid;
  min-width: 19px;
  margin: 0 1px;
  padding: 1px 4px;
  border: 1px solid rgba(233, 245, 255, 0.22);
  border-radius: 4px;
  color: var(--ink);
  background: rgba(233, 245, 255, 0.08);
  font: 700 10px/1.4 var(--sans);
  text-align: center;
}

.world-directory {
  position: absolute;
  bottom: clamp(18px, 4vh, 42px);
  right: clamp(18px, 3vw, 42px);
  left: auto;
  width: min(450px, calc(100vw - 36px));
  padding: 15px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(7, 16, 31, 0.65);
  backdrop-filter: blur(14px);
}

body:not(.webgl-ready) .world-ui { position: relative; min-height: 100vh; }
body:not(.webgl-ready) .world-main { min-height: 820px; }
body:not(.webgl-ready) .world-directory { position: relative; right: auto; bottom: auto; left: auto; width: min(760px, calc(100% - 32px)); margin: 420px auto 32px; }
body.webgl-ready.directory-first { overflow-y: auto; }
body.directory-first #world { position: fixed; }
body.directory-first .world-ui { position: relative; min-height: 100vh; display: block; }
body.directory-first .world-main { min-height: 0; display: grid; gap: 18px; padding: 20px 12px 32px; }
body.directory-first .welcome-card,
body.directory-first .world-directory {
  position: relative;
  inset: auto;
  width: min(760px, 100%);
  margin: 0 auto;
}
body.directory-first .world-directory { max-height: none; overflow: visible; }
body.directory-first .controls { display: none; }
.world-directory > p { margin: 8px 0 0; color: var(--muted); font-size: 12px; }
.directory-list { display: grid; gap: 8px; margin: 12px 0 0; padding: 0; list-style: none; }
.directory-list li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; align-items: center; }
.directory-list a { min-width: 0; padding: 7px 9px; border: 1px solid rgba(233,245,255,.18); border-radius: 10px; font-size: 11px; font-weight: 800; text-decoration: none; overflow-wrap: anywhere; }
.directory-list a:last-child { color: var(--blue); }

.directory-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.directory-heading .eyebrow { margin: 0; color: var(--muted); font-size: 8px; }
.directory-heading h2 { color: var(--muted); font-size: 13px; }
.managed-directory-heading { margin-top: 18px; padding-top: 14px; border-top: 1px solid rgba(233,245,255,.13); }
.directory-list span { padding: 7px 9px; color: var(--muted); font-size: 11px; }

.directory-actions { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 10px; }

.directory-actions button {
  min-height: 32px;
  padding: 5px 10px;
  border: 1px solid rgba(233, 245, 255, 0.18);
  border-radius: 999px;
  color: var(--ink);
  background: rgba(233, 245, 255, 0.06);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
}

.directory-actions button:hover,
.directory-actions button:focus-visible { border-color: var(--blue); background: rgba(128, 209, 255, 0.14); }

.reticle {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 24px;
  height: 24px;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 180ms ease;
}

.reticle::before,
.reticle::after,
.reticle span::before,
.reticle span::after { position: absolute; background: rgba(233, 245, 255, 0.9); content: ""; }
.reticle::before { top: 0; left: 11px; width: 2px; height: 7px; }
.reticle::after { bottom: 0; left: 11px; width: 2px; height: 7px; }
.reticle span::before { top: 11px; left: 0; width: 7px; height: 2px; }
.reticle span::after { top: 11px; right: 0; width: 7px; height: 2px; }

body.is-exploring .reticle { opacity: 1; }

.interaction-prompt {
  position: absolute;
  top: calc(50% + 28px);
  left: 50%;
  width: min(270px, calc(100vw - 36px));
  padding: 9px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(7, 16, 31, 0.76);
  text-align: center;
  transform: translateX(-50%);
  backdrop-filter: blur(12px);
}

.interaction-prompt p { margin: 0 0 7px; color: var(--ink); font-size: 12px; font-weight: 700; }
.interaction-prompt button { border: 0; color: var(--blue); background: transparent; font-size: 12px; font-weight: 900; cursor: pointer; }

.world-status {
  position: absolute;
  right: clamp(18px, 3vw, 42px);
  bottom: clamp(18px, 4vh, 42px);
  max-width: min(390px, calc(100vw - 36px));
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  text-align: right;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.72);
}

.exhibit-panel { position: fixed; z-index: 10; inset: 0; display: grid; place-items: center; padding: 20px; }
.exhibit-panel[hidden] { display: none; }

.panel-backdrop { position: absolute; inset: 0; background: rgba(3, 8, 16, 0.7); backdrop-filter: blur(8px); }

.panel-card {
  position: relative;
  z-index: 1;
  width: min(540px, 100%);
  padding: clamp(26px, 5vw, 42px);
  border: 1px solid rgba(128, 209, 255, 0.36);
  border-radius: 24px;
  background: linear-gradient(145deg, #182a47, #0d182b);
  box-shadow: 0 28px 84px rgba(0, 0, 0, 0.46);
}

.panel-card h2 { color: var(--ink); font-size: clamp(29px, 5vw, 42px); line-height: 1.3; }
.panel-card > p:not(.eyebrow) { margin: 18px 0 0; color: #c2d4e1; font-size: 15px; }

.close-button {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(233, 245, 255, 0.22);
  border-radius: 50%;
  color: var(--ink);
  background: rgba(233, 245, 255, 0.06);
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
}

.panel-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 25px; }

.panel-links a {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  padding: 8px 15px;
  border: 1px solid rgba(128, 209, 255, 0.42);
  border-radius: 999px;
  color: var(--ink);
  background: rgba(128, 209, 255, 0.1);
  font-size: 13px;
  font-weight: 800;
  text-decoration: none;
}

.panel-links a:hover,
.panel-links a:focus-visible { background: rgba(128, 209, 255, 0.24); }

.noscript-message { position: fixed; z-index: 20; inset: auto 16px 16px; padding: 14px; border-radius: 12px; color: white; background: #7d2b31; text-align: center; }

.guide-card { position: fixed; z-index: 8; top: 50%; right: clamp(16px, 4vw, 56px); width: min(430px, calc(100vw - 32px)); padding: 26px; border: 1px solid var(--line); border-radius: 22px; background: rgba(7,16,31,.94); transform: translateY(-50%); }
.guide-card[hidden] { display: none; }
.guide-card h2 { font-size: clamp(25px, 5vw, 36px); }
.guide-card > p:not(.eyebrow) { color: var(--muted); }
.guide-progress { font-size: 12px; font-weight: 800; }
.guide-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.guide-actions button { min-height: 40px; padding: 7px 12px; border: 1px solid var(--line); border-radius: 999px; color: var(--ink); background: rgba(128,209,255,.1); cursor: pointer; }

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

@media (max-width: 700px) {
  .world-header { padding: 14px 16px; }
  .world-header p { font-size: 8px; }
  body:not(.directory-first) .welcome-card { top: 22px; left: 18px; }
  body:not(.directory-first) .world-directory { right: auto; bottom: 16px; left: 18px; max-height: 42vh; overflow: auto; }
  .world-status { display: none; }
  .controls { line-height: 2; }
}

@media (max-width: 390px) {
  body:not(.directory-first) .welcome-card { left: 12px; width: calc(100vw - 24px); }
  .welcome-card { padding: 20px; }
  .start-actions { display: grid; }
  .start-actions .enter-button { width: 100%; }
  body:not(.directory-first) .world-directory { left: 12px; width: calc(100vw - 24px); }
  .directory-list li { grid-template-columns: 1fr; }
  .guide-card { right: 12px; width: calc(100vw - 24px); padding: 20px; }
  .exhibit-panel { padding: 12px; }
  .panel-card { padding: 24px 18px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}