/* ==========================================================================
   RenderFrost SMP — 11 Rules page
   Built for extended reading: sticky contents rail + numbered rule blocks.
   ========================================================================== */

.rules-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}

.rules-toc {
  position: sticky;
  top: calc(var(--nav-h) + 2rem);
  max-height: calc(100svh - var(--nav-h) - 4rem);
  overflow-y: auto;
  padding-right: 0.5rem;
}

.rules-toc__title {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: var(--fs-eyebrow);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.rules-toc__list { list-style: none; display: grid; gap: 0.1rem; }

.rules-toc__link {
  display: flex;
  gap: 0.7rem;
  padding: 0.42rem 0.6rem;
  border-radius: var(--r-sm);
  border-left: 1px solid transparent;
  color: var(--text-muted);
  font-size: var(--fs-small);
  line-height: 1.4;
  text-decoration: none;
  transition: color var(--t-fast) var(--ease),
    background-color var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease);
}

.rules-toc__link:hover { color: var(--frost-100); background: var(--surface-3); }

.rules-toc__link b {
  font-family: var(--font-mono);
  font-size: var(--fs-eyebrow);
  font-weight: 500;
  color: var(--text-faint);
  flex: none;
  padding-top: 0.15em;
}

.rules-toc__link.is-current {
  color: var(--frost-100);
  background: rgba(139, 92, 246, 0.12);
  border-left-color: var(--violet-400);
}

.rules-toc__link.is-current b { color: var(--violet-300); }

.rule {
  padding: clamp(1.5rem, 3vw, 2.4rem) 0;
  border-top: 1px solid var(--hairline);
  scroll-margin-top: calc(var(--nav-h) + 1.5rem);
}

.rule:not(:first-of-type) { border-image: linear-gradient(90deg, var(--glass-border), transparent 82%) 1; }

.rule:first-of-type { border-top: 0; padding-top: 0; }

.rule__head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1.1rem;
}

.rule__num {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.1em;
  color: var(--violet-400);
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--glass-border);
  border-radius: var(--r-sm);
  flex: none;
  line-height: 1;
}

.rule__title {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 1.1vw + 1rem, 1.65rem);
  font-weight: 700;
  letter-spacing: 0;
  color: var(--frost-100);
  margin: 0;
  line-height: 1.2;
}

.rule__body { font-size: var(--fs-body-lg); line-height: 1.75; color: var(--text-secondary); }
.rule__body p:last-child { margin-bottom: 0; }

.rule__sub {
  margin: 1.25rem 0 0.6rem;
  font-family: var(--font-mono);
  font-size: var(--fs-eyebrow);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.rule__list { list-style: none; display: grid; gap: 0.55rem; margin: 0 0 1.2rem; }

.rule__list li {
  position: relative;
  padding-left: 1.5rem;
  font-size: var(--fs-body);
  line-height: 1.65;
  color: var(--text-secondary);
}

.rule__list li::before {
  content: "";
  position: absolute;
  left: 0.15rem;
  top: 0.72em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--violet-500);
}

/* Consequence / restriction emphasis — restrained, not an alarm. */
.rule__warn {
  margin-top: 1.25rem;
  padding: 0.9rem 1.15rem;
  border-left: 2px solid var(--warning);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: rgba(240, 194, 100, 0.07);
  font-size: var(--fs-small);
  line-height: 1.65;
  color: var(--frost-200);
}

.rule__ok {
  margin-top: 1.25rem;
  padding: 0.9rem 1.15rem;
  border-left: 2px solid var(--success);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: rgba(94, 211, 165, 0.07);
  font-size: var(--fs-small);
  line-height: 1.65;
  color: var(--frost-200);
}

.rule__ok ul { list-style: none; margin: 0.5rem 0 0; display: grid; gap: 0.35rem; }
.rule__ok li { padding-left: 1.1rem; position: relative; }
.rule__ok li::before { content: "+"; position: absolute; left: 0; color: var(--success); }

/* Mobile: TOC becomes an accessible expandable menu. */
.rules-toc__mobile { display: none; }

/* Numbered process list (whitelist steps) — real ordered semantics. */
.rule__list--steps {
  counter-reset: step;
  list-style: none;
  padding-left: 0;
}

.rule__list--steps li {
  counter-increment: step;
  padding-left: 2.1rem;
}

.rule__list--steps li::before {
  content: counter(step);
  top: 0.15em;
  left: 0;
  width: 18px;
  height: 18px;
  display: grid;
  place-items: center;
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  background: rgba(139, 92, 246, 0.12);
  color: var(--violet-300);
  font-family: var(--font-mono);
  font-size: 0.625rem;
}

/* Closing community statement */
.rule--statement { padding-top: 1.25rem; }

.rule__thanks {
  margin-top: 1.25rem;
  font-size: var(--fs-small);
  color: var(--text-muted);
}

details.rules-jump {
  border: 1px solid var(--glass-border);
  border-radius: var(--r-md);
  background: var(--surface-1);
  overflow: hidden;
}

details.rules-jump > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.9rem 1.1rem;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--fs-eyebrow);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--violet-300);
  list-style: none;
}

details.rules-jump > summary::-webkit-details-marker { display: none; }

details.rules-jump > summary::after {
  content: "";
  width: 7px;
  height: 7px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform var(--t-base) var(--ease);
}

details.rules-jump[open] > summary::after { transform: rotate(225deg) translateY(-1px); }

details.rules-jump .rules-toc__list {
  padding: 0.35rem 0.6rem 0.9rem;
  max-height: 46vh;
  overflow-y: auto;
}