/* Interactive Rules: desktop-first rulebook shell backed by MTGR-Rules. */
.rules-app {
  --rules-rail: 310px;
  --rules-reading: 860px;
}

.rules-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, .65fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: end;
  padding: clamp(36px, 5vw, 68px) 0 28px;
  border-bottom: 1px solid var(--color-border, rgba(25,24,29,.14));
}
.rules-intro h1 {
  max-width: 12ch;
  margin: 7px 0 14px;
  font-size: clamp(3rem, 6vw, 5.8rem);
  line-height: .98;
}
.rules-intro-copy > p { max-width: 68ch; font-size: 1.06rem; }
.rules-source-card {
  display: grid;
  gap: 8px;
  padding: 18px 0 4px 22px;
  border-left: 1px solid var(--color-border, rgba(25,24,29,.14));
}
.rules-source-card strong { color: var(--color-ink, #19181d); }
.rules-source-card a { color: var(--color-action-text, #a83b1d); font-weight: 700; }
.rules-source-status { margin: 0; font-size: .82rem; }

.rules-modebar {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border, rgba(25,24,29,.14));
}
.rules-mode {
  min-height: 44px;
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--color-muted, #66636b);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}
.rules-mode:hover { background: rgba(25,24,29,.045); color: var(--color-ink, #19181d); }
.rules-mode[aria-selected="true"] {
  border-color: rgba(196,73,38,.26);
  background: rgba(196,73,38,.09);
  color: var(--color-action-text, #a83b1d);
}

.rules-shell {
  display: grid;
  grid-template-columns: minmax(260px, var(--rules-rail)) minmax(0, 1fr);
  gap: clamp(28px, 4vw, 54px);
  align-items: start;
  padding: 28px 0 60px;
}
.rules-rail {
  position: sticky;
  top: 98px;
  display: grid;
  gap: 18px;
  max-height: calc(100vh - 122px);
  overflow: auto;
  padding-right: 8px;
  scrollbar-width: thin;
}
.rules-search-wrap { display: grid; gap: 7px; }
.rules-search-wrap label,
.rules-rail-heading {
  color: var(--color-muted, #66636b);
  font-size: .75rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.rules-search { min-height: 46px; }
.rules-search-hint { font-size: .76rem; line-height: 1.45; }
.rules-search-results,
.rules-nav-list { display: grid; gap: 4px; }
.rules-search-results[hidden] { display: none; }
.rules-search-item,
.rules-nav-item {
  width: 100%;
  display: grid;
  gap: 2px;
  padding: 9px 10px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.rules-search-item:hover,
.rules-nav-item:hover { background: rgba(23,106,107,.055); }
.rules-search-item strong,
.rules-nav-item strong { font-size: .86rem; }
.rules-search-item span,
.rules-nav-item span { color: var(--color-muted, #66636b); font-size: .72rem; }
.rules-search-empty { padding: 10px; color: var(--color-muted, #66636b); font-size: .82rem; }
.rules-rail-divider { border-top: 1px solid var(--color-border, rgba(25,24,29,.12)); }

.rules-main { min-width: 0; }
.rules-view { max-width: 1080px; }
.rules-view[hidden] { display: none; }
.rules-view-head { max-width: 760px; margin-bottom: 28px; }
.rules-view-head h2 { margin: 5px 0 10px; font-size: clamp(1.8rem, 3vw, 2.65rem); }

.rules-learn-list { display: grid; border-top: 1px solid var(--color-border, rgba(25,24,29,.14)); }
.rules-learn-chapter {
  display: grid;
  grid-template-columns: 60px minmax(220px, .65fr) minmax(0, 1.35fr);
  gap: 22px;
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border, rgba(25,24,29,.14));
}
.rules-chapter-number { color: var(--color-action-text, #a83b1d); font-size: .78rem; font-weight: 900; letter-spacing: .1em; }
.rules-learn-chapter h3 { margin: 0 0 7px; font-size: 1.2rem; }
.rules-learn-links { display: grid; gap: 6px; align-content: start; }
.rules-link-button {
  width: 100%;
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 8px 10px;
  border: 0;
  border-bottom: 1px solid rgba(25,24,29,.08);
  background: transparent;
  color: var(--color-ink, #19181d);
  font: inherit;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}
.rules-link-button::after { content: "→"; color: var(--color-action-text, #a83b1d); }
.rules-link-button:hover { background: rgba(23,106,107,.045); }

.rules-reference-groups { display: grid; gap: 34px; }
.rules-reference-group h3 {
  margin: 0 0 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border, rgba(25,24,29,.14));
  font-size: .82rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.rules-reference-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 20px;
}
.rules-reference-summary {
  margin: -14px 0 24px;
  padding: 10px 12px;
  border-radius: 9px;
  background: rgba(23,106,107,.06);
  color: var(--color-progress, #176a6b);
  font-weight: 700;
}
.rules-reference-summary[hidden] { display: none; }
.rules-reference-core h4 {
  margin: 0 0 8px;
  color: var(--color-muted, #66636b);
  font-size: .72rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.rules-reference-collection {
  margin-top: 12px;
  border: 1px solid var(--color-border, rgba(25,24,29,.12));
  border-radius: 11px;
  background: rgba(251,247,239,.42);
}
.rules-reference-collection summary {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 14px;
  cursor: pointer;
  list-style-position: inside;
}
.rules-reference-collection summary::before {
  content: "+";
  color: var(--color-action-text, #a83b1d);
  font-weight: 900;
}
.rules-reference-collection[open] summary::before { content: "−"; }
.rules-reference-collection summary strong { margin-right: auto; }
.rules-reference-collection summary:hover { background: rgba(23,106,107,.045); }
.rules-reference-collection summary span {
  color: var(--color-muted, #66636b);
  font-size: .78rem;
  font-weight: 700;
}
.rules-reference-collection .rules-reference-list { padding: 0 14px 12px; }
.rules-reference-empty {
  padding: 24px;
  border: 1px dashed var(--color-border, rgba(25,24,29,.18));
  border-radius: 12px;
  color: var(--color-muted, #66636b);
}

.rules-guides {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.rules-guide-card {
  min-height: 180px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 10px;
  padding: 22px;
  border: 1px solid var(--color-border, rgba(25,24,29,.14));
  border-radius: 14px;
  background: rgba(251,247,239,.76);
  color: inherit;
  text-align: left;
  font: inherit;
  cursor: pointer;
}
.rules-guide-card:hover { border-color: rgba(23,106,107,.3); background: rgba(255,250,242,.96); }
.rules-guide-card h3 { margin: 0; font-size: 1.15rem; }
.rules-guide-card span { color: var(--color-action-text, #a83b1d); font-size: .78rem; font-weight: 800; }

.rules-guide-detail { max-width: var(--rules-reading); }
.rules-guide-back,
.rules-rule-back {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 8px;
  margin-left: -8px;
  border: 0;
  background: transparent;
  color: var(--color-muted, #66636b);
  font: inherit;
  font-size: .82rem;
  font-weight: 800;
  cursor: pointer;
}
.rules-guide-back:hover,
.rules-rule-back:hover { color: var(--color-action-text, #a83b1d); }
.rules-guide-detail h2 { margin: 10px 0 8px; font-size: clamp(2rem, 4vw, 3.3rem); }
.rules-guide-steps { display: grid; margin-top: 26px; counter-reset: guide; }
.rules-guide-step {
  counter-increment: guide;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 14px;
  padding: 17px 0;
  border-top: 1px solid var(--color-border, rgba(25,24,29,.12));
}
.rules-guide-step::before {
  content: "0" counter(guide);
  color: var(--color-action-text, #a83b1d);
  font-size: .74rem;
  font-weight: 900;
  padding-top: 4px;
}
.rules-guide-step-main { display: grid; gap: 8px; }
.rules-guide-step-main > strong { font-size: 1rem; }
.rules-guide-actions { display: flex; flex-wrap: wrap; gap: 7px; }
.rules-guide-actions button {
  min-height: 38px;
  padding: 6px 9px;
  border: 1px solid rgba(25,24,29,.16);
  border-radius: 8px;
  background: rgba(251,247,239,.72);
  color: inherit;
  font: inherit;
  font-size: .78rem;
  font-weight: 700;
  cursor: pointer;
}
.rules-guide-actions button:hover { border-color: rgba(23,106,107,.32); }

.rules-rule-view { max-width: var(--rules-reading); }
.rules-rule-head {
  display: grid;
  gap: 10px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border, rgba(25,24,29,.14));
}
.rules-rule-head h2 { margin: 0; font-size: clamp(2.25rem, 4vw, 3.8rem); line-height: 1; }
.rules-rule-meta { display: flex; flex-wrap: wrap; gap: 7px; }
.rules-rule-meta span {
  padding: 5px 8px;
  border-radius: 999px;
  background: rgba(23,106,107,.07);
  color: #155556;
  font-size: .7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.rules-rule-tools { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 2px; }
.rules-rule-tools button,
.rules-rule-tools a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 6px 9px;
  border: 1px solid rgba(25,24,29,.15);
  border-radius: 8px;
  background: transparent;
  color: var(--color-muted, #66636b);
  font: inherit;
  font-size: .76rem;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}
.rules-rule-tools button:hover,
.rules-rule-tools a:hover { color: var(--color-ink, #19181d); border-color: rgba(25,24,29,.3); }
.rules-rule-content { padding: 24px 0 12px; }
.rules-rule-content h3,
.rules-rule-content h4,
.rules-rule-content h5 { margin: 28px 0 10px; }
.rules-rule-content h3 { font-size: 1.35rem; }
.rules-rule-content h4 { font-size: 1.1rem; }
.rules-rule-content p { margin: 0 0 14px; }
.rules-rule-content ul,
.rules-rule-content ol { margin: 0 0 16px; padding-left: 24px; color: var(--color-muted, #66636b); }
.rules-rule-content li { margin: 5px 0; }
.rules-rule-content blockquote {
  margin: 18px 0;
  padding: 12px 16px;
  border-left: 3px solid var(--color-progress, #176a6b);
  background: rgba(23,106,107,.055);
}
.rules-rule-content blockquote p { margin: 0; }
.rules-rule-content hr { border: 0; border-top: 1px solid var(--color-border, rgba(25,24,29,.12)); margin: 26px 0; }
.rules-rule-content .rules-table-wrap { overflow-x: auto; margin: 18px 0 22px; border: 1px solid var(--color-border, rgba(25,24,29,.14)); border-radius: 10px; }
.rules-rule-content table { margin: 0; }
.rules-rule-content a { color: var(--color-action-text, #a83b1d); }
.rules-source-mismatch {
  padding: 16px;
  border: 1px solid rgba(179,58,40,.22);
  border-radius: 10px;
  background: rgba(179,58,40,.07);
  color: #711f15;
}
.rules-related { margin-top: 28px; padding-top: 22px; border-top: 1px solid var(--color-border, rgba(25,24,29,.14)); }
.rules-related h3 { margin: 0 0 9px; font-size: .82rem; letter-spacing: .08em; text-transform: uppercase; }
.rules-related-links { display: flex; flex-wrap: wrap; gap: 8px; }
.rules-related-links button {
  min-height: 40px;
  padding: 7px 10px;
  border: 1px solid rgba(25,24,29,.14);
  border-radius: 9px;
  background: transparent;
  color: inherit;
  font: inherit;
  font-size: .8rem;
  font-weight: 700;
  cursor: pointer;
}
.rules-related-links button:hover { border-color: rgba(23,106,107,.3); background: rgba(23,106,107,.04); }
.rules-loading { padding: 38px 0; color: var(--color-muted, #66636b); }
.rules-fatal {
  max-width: 780px;
  padding: 24px;
  border: 1px solid rgba(179,58,40,.22);
  border-radius: 14px;
  background: rgba(179,58,40,.06);
}

@media (max-width: 980px) {
  .rules-intro { grid-template-columns: 1fr; }
  .rules-source-card { padding-left: 0; border-left: 0; }
  .rules-shell { grid-template-columns: 1fr; }
  .rules-rail { position: static; max-height: none; padding-right: 0; }
  .rules-nav-section { display: none; }
  .rules-reference-list { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .rules-modebar { overflow-x: auto; }
  .rules-mode { flex: 0 0 auto; }
  .rules-learn-chapter { grid-template-columns: 42px 1fr; }
  .rules-learn-links { grid-column: 2; }
  .rules-guides { grid-template-columns: 1fr; }
}