:root {
  --bg: #080a0f;
  --surface: #101621;
  --surface-strong: #0b111a;
  --line: #263244;
  --line-hot: rgba(0, 229, 255, 0.48);
  --text: #e6f1ff;
  --muted: #9aaac0;
  --cyan: #00e5ff;
  --magenta: #ff2a6d;
  --yellow: #fcee09;
  --green: #9bff4a;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 12% 20%, rgba(0, 229, 255, 0.09), transparent 30%),
    radial-gradient(circle at 88% 14%, rgba(255, 42, 109, 0.08), transparent 30%),
    var(--bg);
  color: var(--text);
  font-family: Arial, "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.75;
}

a { color: var(--cyan); }
strong { color: #f7fbff; }
h1, h2, h3 { line-height: 1.35; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--line);
  background: rgba(8, 10, 15, 0.94);
  backdrop-filter: blur(14px);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  width: min(1180px, calc(100% - 32px));
  min-height: 66px;
  margin: 0 auto;
}

.public-brand {
  display: grid;
  color: var(--text);
  font-size: 18px;
  font-weight: 900;
  line-height: 1.15;
  text-decoration: none;
}

.public-brand small {
  color: var(--cyan);
  font-size: 9px;
  letter-spacing: 0.16em;
}

.public-nav {
  display: flex;
  gap: 8px;
}

.public-nav a {
  min-width: 120px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
  text-align: center;
  text-decoration: none;
}

.public-nav a:hover,
.public-nav a[aria-current="page"] {
  border-color: var(--cyan);
  background: rgba(0, 229, 255, 0.08);
  color: var(--cyan);
}

.page-shell {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 64px;
}

.panel {
  padding: clamp(20px, 4vw, 34px);
  border: 1px solid var(--line);
  background: linear-gradient(145deg, rgba(18, 23, 34, 0.96), rgba(10, 15, 23, 0.96));
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.16);
}

.item {
  padding: 12px;
  border: 1px solid var(--line);
  background: rgba(0, 229, 255, 0.035);
}

.message {
  padding: 12px 14px;
  border-left: 3px solid var(--cyan);
  background: rgba(0, 229, 255, 0.06);
}

.world-hero,
.rulebook-hero {
  position: relative;
  overflow: hidden;
  margin-bottom: 20px;
  padding: clamp(28px, 5vw, 54px);
  border: 1px solid var(--line-hot);
  background:
    linear-gradient(125deg, rgba(0, 229, 255, 0.13), transparent 52%),
    linear-gradient(315deg, rgba(255, 42, 109, 0.1), transparent 48%),
    #0c111a;
  box-shadow: 0 0 28px rgba(0, 229, 255, 0.1);
}

.world-hero::after,
.rulebook-hero::after {
  position: absolute;
  right: 14px;
  bottom: -8px;
  color: rgba(0, 229, 255, 0.055);
  font-size: clamp(32px, 7vw, 74px);
  font-weight: 900;
  white-space: nowrap;
  pointer-events: none;
}

.world-hero::after { content: "LDC // ORIENTATION"; }
.rulebook-hero::after { content: "LDC // RULEBOOK"; }
.world-hero > *, .rulebook-hero > * { position: relative; z-index: 1; }

.world-eyebrow,
.world-section-no,
.world-speaker,
.rulebook-eyebrow,
.rulebook-section-no {
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.16em;
}

.world-hero h1,
.rulebook-hero h1 {
  max-width: 850px;
  margin: 8px 0 14px;
  font-size: clamp(32px, 5vw, 58px);
  line-height: 1.08;
}

.world-hero > p,
.rulebook-hero > p {
  max-width: 820px;
  margin-bottom: 0;
  font-size: 17px;
}

.world-system-message {
  max-width: 840px;
  margin-top: 24px;
  padding: 15px 18px;
  border-left: 3px solid var(--cyan);
  background: linear-gradient(90deg, rgba(0, 229, 255, 0.1), rgba(255, 42, 109, 0.05));
}

.world-system-message p { margin: 7px 0 0; font-weight: 800; }
.world-system-message small { display: block; margin-top: 8px; color: var(--muted); }
.world-system-message--dark { max-width: none; background: rgba(8, 10, 15, 0.58); }

.page-toc { margin-bottom: 20px; }
.page-toc h2 { margin-top: 0; }
.page-toc ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 28px;
  margin: 0;
  padding-left: 28px;
}
.page-toc a { color: var(--text); text-underline-offset: 3px; }
.page-toc a:hover { color: var(--cyan); }

.world-content,
.rulebook-content { display: grid; gap: 20px; }
.world-section,
.rulebook-section { scroll-margin-top: 86px; }
.world-section h2,
.rulebook-section h2 { margin-top: 2px; }
.world-section h3,
.rulebook-section h3 { margin: 24px 0 8px; color: var(--cyan); }
.world-section p { max-width: 980px; }

.world-data-strip { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.world-data-strip span {
  padding: 6px 9px;
  border: 1px solid var(--line);
  background: rgba(0, 229, 255, 0.045);
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
}
.world-data-strip b { margin-right: 6px; color: var(--cyan); }
.world-warning { margin-top: 18px; border-left-color: var(--yellow); background: rgba(252, 238, 9, 0.06); }

.world-element-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-top: 20px;
}
.world-element-card { min-width: 0; padding: 14px; border: 1px solid var(--line); background: rgba(8, 12, 19, 0.72); }
.world-element-card > span { font-size: 10px; font-weight: 900; letter-spacing: 0.16em; }
.world-element-card h3 { margin: 5px 0 8px; color: var(--text); }
.world-element-card p { margin: 0; color: var(--muted); font-size: 13px; }
.element-fire { border-top-color: #ff5d5d; } .element-fire > span { color: #ff7676; }
.element-water { border-top-color: #4b82ff; } .element-water > span { color: #7ba1ff; }
.element-thunder { border-top-color: var(--yellow); } .element-thunder > span { color: var(--yellow); }
.element-wind { border-top-color: var(--green); } .element-wind > span { color: var(--green); }
.element-ice { border-top-color: var(--cyan); } .element-ice > span { color: var(--cyan); }
.world-reference-note { color: var(--muted); font-size: 13px; }

.world-company-grid,
.world-activity-grid,
.rulebook-flow,
.rulebook-definition-grid,
.rulebook-choice-grid,
.rulebook-menu-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 20px;
}
.world-company-grid .item,
.world-activity-grid .item,
.rulebook-flow .item,
.rulebook-definition-grid .item,
.rulebook-choice-grid .item,
.rulebook-menu-grid .item { display: grid; align-content: start; gap: 6px; }
.world-company-grid strong,
.world-activity-grid strong,
.rulebook-flow strong,
.rulebook-definition-grid strong,
.rulebook-choice-grid strong,
.rulebook-menu-grid strong { color: var(--cyan); }
.world-company-disclaimer { border-color: rgba(252, 238, 9, 0.4); background: rgba(252, 238, 9, 0.045); }
.world-company-disclaimer strong { color: var(--yellow); }

.world-broadcast-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin: 22px 0;
  border: 1px solid var(--line-hot);
  background: var(--line);
}
.world-broadcast-flow > div { display: grid; gap: 5px; padding: 15px; background: rgba(8, 12, 19, 0.94); }
.world-broadcast-flow span { color: var(--cyan); font-size: 11px; font-weight: 900; }
.world-broadcast-flow b { letter-spacing: 0.08em; }
.world-broadcast-flow small { color: var(--muted); }

.world-contract-card { display: grid; gap: 1px; margin-top: 20px; border: 1px solid var(--line); background: var(--line); }
.world-contract-card > div { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: 18px; padding: 11px 14px; background: rgba(8, 12, 19, 0.86); }
.world-contract-card span { color: var(--muted); font-size: 11px; font-weight: 900; letter-spacing: 0.08em; }
.world-contract-card strong { color: var(--cyan); overflow-wrap: anywhere; }

.world-continuity-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin: 20px 0; }
.world-choice-card { padding: 18px; border: 1px solid var(--line); background: rgba(8, 12, 19, 0.72); }
.world-choice-card > span { color: var(--muted); font-size: 11px; font-weight: 900; letter-spacing: 0.12em; }
.world-choice-card p { color: var(--muted); }
.world-choice-card > strong { display: block; margin-top: 16px; font-size: 12px; letter-spacing: 0.08em; }
.clone-choice { border-left: 3px solid var(--magenta); } .clone-choice > strong { color: var(--magenta); }
.rescue-choice { border-left: 3px solid var(--yellow); } .rescue-choice > strong { color: var(--yellow); }

.rulebook-notice { max-width: 800px; margin: 20px 0 0; }
.rulebook-section li + li { margin-top: 5px; }
.rulebook-steps { counter-reset: step; display: grid; gap: 10px; padding: 0; list-style: none; }
.rulebook-steps li { counter-increment: step; position: relative; min-height: 44px; padding: 10px 12px 10px 54px; border-left: 2px solid var(--cyan); background: rgba(0, 229, 255, 0.06); }
.rulebook-steps li::before { content: counter(step, decimal-leading-zero); position: absolute; left: 12px; color: var(--cyan); font-weight: 900; }
.rulebook-table-wrap { overflow-x: auto; }
.rulebook-table { width: 100%; border-collapse: collapse; }
.rulebook-table th, .rulebook-table td { padding: 10px 12px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.rulebook-table th { width: 150px; color: var(--cyan); background: rgba(0, 229, 255, 0.08); }
.rulebook-warning { border-left-color: var(--yellow); background: rgba(252, 238, 9, 0.06); }
.rulebook-status-list { display: grid; gap: 12px; }
.rulebook-status-list .item h3 { margin-top: 0; }
.rulebook-alert-text { color: var(--yellow); }
.rulebook-faq { padding: 12px 4px; border-bottom: 1px solid var(--line); }
.rulebook-faq summary { cursor: pointer; font-weight: 800; }
.rulebook-faq[open] summary { color: var(--cyan); }
.rulebook-faq p { margin: 10px 0 0 20px; color: var(--muted); }

.world-closing {
  margin-top: 20px;
  padding: clamp(20px, 4vw, 32px);
  border: 1px solid var(--line-hot);
  background: linear-gradient(100deg, rgba(0, 229, 255, 0.1), rgba(255, 42, 109, 0.08)), rgba(10, 15, 24, 0.94);
  text-align: center;
}
.world-closing p { margin: 10px auto 0; max-width: 820px; font-weight: 800; }
.back-to-top { margin-top: 20px; text-align: right; }

.site-footer {
  padding: 26px 16px 40px;
  color: #74849a;
  font-size: 11px;
  text-align: center;
}

@media (max-width: 980px) {
  .world-element-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .world-element-card:last-child { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
  .site-header-inner { align-items: stretch; flex-direction: column; gap: 10px; padding: 12px 0; }
  .public-nav { display: grid; grid-template-columns: 1fr 1fr; }
  .public-nav a { min-width: 0; }
  .page-shell { width: min(100% - 20px, 1080px); padding-top: 18px; }
  .page-toc ol,
  .world-company-grid,
  .world-activity-grid,
  .world-continuity-grid,
  .world-broadcast-flow,
  .rulebook-flow,
  .rulebook-definition-grid,
  .rulebook-choice-grid,
  .rulebook-menu-grid { grid-template-columns: 1fr; }
  .world-contract-card > div { grid-template-columns: 1fr; gap: 4px; }
  .rulebook-table th { width: 100px; }
}

@media (max-width: 460px) {
  .world-element-grid { grid-template-columns: 1fr; }
  .world-element-card:last-child { grid-column: auto; }
  .world-hero, .rulebook-hero, .panel { padding: 20px 16px; }
}