/* Rocketshot standalone pages — one shared flight-deck visual language. */
html { scroll-behavior: smooth; }
body.subpage-body {
  display: block;
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 18% 14%, color-mix(in srgb, var(--accent) 11%, transparent) 0 1px, transparent 2px),
    radial-gradient(circle at 72% 9%, color-mix(in srgb, var(--ink) 32%, transparent) 0 1px, transparent 2px),
    radial-gradient(circle at 88% 38%, color-mix(in srgb, var(--accent) 9%, transparent) 0 1px, transparent 2px),
    radial-gradient(circle at 30% 72%, color-mix(in srgb, var(--ink) 22%, transparent) 0 1px, transparent 2px),
    linear-gradient(180deg, color-mix(in srgb, var(--panel) 72%, var(--bg)) 0, var(--bg) 30rem);
  background-size: 18rem 18rem, 22rem 22rem, 26rem 26rem, 31rem 31rem, auto;
}
body.subpage-body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(circle at 14% 10%, color-mix(in srgb, var(--accent) 9%, transparent), transparent 24rem),
    radial-gradient(circle at 82% 24%, color-mix(in srgb, var(--up) 5%, transparent), transparent 22rem);
}
html[data-theme="cardboard"] body.subpage-body {
  background-color: var(--bg);
  background-image: var(--bg-grad);
}

.subnav {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: 4rem;
  border-bottom: 1px solid color-mix(in srgb, var(--edge) 78%, transparent);
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  backdrop-filter: blur(18px);
}
.subnav-inner {
  width: min(70rem, calc(100% - 2rem));
  min-height: 4rem;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.sub-brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  color: var(--ink-strong);
  text-decoration: none;
  font-weight: 900;
  letter-spacing: .07em;
}
.sub-brand img { width: 2rem; height: 2rem; }
.sub-brand span { color: var(--accent); }
.subnav-links { display: flex; align-items: center; gap: .3rem; }
.subnav-links a,
.theme-cycle {
  border: 1px solid transparent;
  border-radius: .6rem;
  padding: .45rem .65rem;
  background: transparent;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: .78rem;
}
.subnav-links a:hover,
.subnav-links a[aria-current="page"],
.theme-cycle:hover {
  border-color: var(--edge);
  background: var(--card);
  color: var(--ink);
}
.theme-cycle {
  min-width: 2.35rem;
  border-color: var(--edge);
  cursor: pointer;
}

.subpage-shell {
  width: min(70rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 5rem) 0 4rem;
}
.sub-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: 20rem;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(14rem, .65fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
  padding: clamp(2rem, 6vw, 4.5rem);
  border: 1px solid color-mix(in srgb, var(--accent) 23%, var(--edge));
  border-radius: 1.4rem;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--panel) 96%, transparent), color-mix(in srgb, var(--card) 82%, transparent));
  box-shadow: 0 24px 70px rgba(0, 0, 0, .18);
}
.sub-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  width: 24rem;
  height: 24rem;
  right: -8rem;
  top: -9rem;
  border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
  border-radius: 50%;
  box-shadow:
    0 0 0 4rem color-mix(in srgb, var(--accent) 3%, transparent),
    0 0 0 8rem color-mix(in srgb, var(--accent) 2%, transparent);
}
.sub-eyebrow {
  display: block;
  margin-bottom: .8rem;
  color: var(--accent);
  font-size: .68rem;
  font-weight: 900;
  letter-spacing: .17em;
  text-transform: uppercase;
}
.sub-hero h1 {
  max-width: 14ch;
  color: var(--ink-strong);
  font-size: clamp(2.35rem, 7vw, 5rem);
  line-height: .96;
  letter-spacing: -.055em;
}
.sub-hero .lead {
  max-width: 42rem;
  margin-top: 1.2rem;
  color: var(--ink-soft);
  font-size: clamp(.96rem, 1.6vw, 1.12rem);
  line-height: 1.65;
}
.hero-mark {
  justify-self: center;
  width: clamp(9rem, 20vw, 14rem);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--edge));
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 7%, var(--card));
  color: var(--accent);
  font-size: clamp(4rem, 10vw, 7rem);
  box-shadow: inset 0 0 0 1.2rem color-mix(in srgb, var(--accent) 3%, transparent);
}
.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin-top: 1.4rem;
}
.hero-chip {
  padding: .42rem .68rem;
  border: 1px solid var(--edge);
  border-radius: 999px;
  background: color-mix(in srgb, var(--card) 82%, transparent);
  color: var(--ink-soft);
  font-size: .72rem;
  font-weight: 700;
}
.hero-chip::before { content: "●"; margin-right: .4rem; color: var(--up); font-size: .55rem; }

.content-stack { display: grid; gap: 1rem; margin-top: 1rem; }
.content-card {
  min-width: 0;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--edge);
  border-radius: 1rem;
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  box-shadow: var(--panel-shadow);
}
.content-card h2 {
  color: var(--ink-strong);
  font-size: 1.12rem;
  letter-spacing: -.015em;
}
.content-card h3 { color: var(--ink); font-size: .92rem; }
.content-card p,
.content-card li {
  color: var(--ink-soft);
  font-size: .9rem;
  line-height: 1.68;
}
.content-card p + p { margin-top: .8rem; }
.content-card ul,
.content-card ol { display: grid; gap: .55rem; margin-top: .75rem; padding-left: 1.2rem; }
.content-card a,
.sub-footer a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: .2em; }
.content-card code {
  padding: .12rem .38rem;
  border: 1px solid var(--edge);
  border-radius: .35rem;
  background: var(--card);
  color: var(--ink);
  font: .82em/1.5 ui-monospace, SFMono-Regular, Consolas, monospace;
  overflow-wrap: anywhere;
}
.card-kicker {
  display: block;
  margin-bottom: .45rem;
  color: var(--ink-faint);
  font-size: .63rem;
  font-weight: 850;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.verify-grid,
.two-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}
.field-stack { display: grid; gap: .7rem; margin-top: 1rem; }
.field-stack label {
  display: grid;
  gap: .32rem;
  color: var(--ink-soft);
  font-size: .72rem;
  font-weight: 700;
}
.field-stack .field { width: 100%; }
.button-row { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; margin-top: .2rem; }
.proof-output {
  min-height: 4rem;
  display: grid;
  align-content: center;
  margin-top: 1rem;
  padding: .8rem 1rem;
  border: 1px dashed var(--edge-strong);
  border-radius: .75rem;
  background: color-mix(in srgb, var(--card) 78%, transparent);
  color: var(--ink-soft);
}
.proof-output:empty::before { content: "Your independently calculated result will appear here."; font-size: .78rem; }
.proof-output .big { color: var(--ink-strong); font-size: clamp(1.55rem, 4vw, 2.4rem); font-weight: 900; }
.proof-output .ok { color: var(--up); }
.proof-output .bad { color: var(--down); }
.proof-output > span + span { display: block; margin-top: .4rem; }
.reset-message:empty { display: none; }
.reset-message:empty::before { content: none; }
.chain-data {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .55rem .9rem;
  margin-top: 1rem;
  font-size: .78rem;
}
.chain-data dt { color: var(--ink-faint); }
.chain-data dd { min-width: 0; margin: 0; color: var(--ink); overflow-wrap: anywhere; }
.math-steps {
  counter-reset: proof-step;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .7rem;
  margin-top: 1rem;
}
.math-step {
  counter-increment: proof-step;
  min-width: 0;
  padding: 1rem;
  border: 1px solid var(--edge);
  border-radius: .8rem;
  background: var(--card);
}
.math-step::before {
  content: "0" counter(proof-step);
  display: block;
  margin-bottom: .8rem;
  color: var(--accent);
  font-size: .7rem;
  font-weight: 900;
  letter-spacing: .08em;
}
.math-step b { color: var(--ink); font-size: .82rem; }
.math-step p { margin-top: .35rem; font-size: .78rem; }

.doc-layout {
  display: grid;
  grid-template-columns: 14rem minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  margin-top: 1rem;
}
.doc-nav {
  position: sticky;
  top: 5rem;
  display: grid;
  gap: .25rem;
}
.doc-nav a {
  padding: .52rem .65rem;
  border-radius: .5rem;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: .76rem;
}
.doc-nav a:hover { background: var(--card); color: var(--ink); }
.doc-article { display: grid; gap: 1rem; }
.doc-section { scroll-margin-top: 5rem; }
.doc-section h2 { margin-bottom: .65rem; }
.notice-card {
  border-color: color-mix(in srgb, var(--accent) 42%, var(--edge));
  background: color-mix(in srgb, var(--accent) 7%, var(--panel));
}

.auth-shell {
  min-height: calc(100vh - 4rem);
  display: grid;
  place-items: center;
  width: min(32rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0;
}
.auth-card { width: 100%; }
.auth-symbol {
  width: 4rem;
  height: 4rem;
  display: grid;
  place-items: center;
  margin-bottom: 1.2rem;
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--edge));
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 8%, var(--card));
  color: var(--accent);
  font-size: 1.8rem;
}
.auth-card h1 { color: var(--ink-strong); font-size: clamp(1.8rem, 6vw, 2.6rem); letter-spacing: -.04em; }
.auth-card > p { margin-top: .6rem; color: var(--ink-soft); line-height: 1.55; }
.auth-card .field-stack { margin-top: 1.4rem; }
.auth-foot { margin-top: 1rem; font-size: .78rem; }

.sub-footer {
  width: min(70rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.4rem 0 2.4rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--edge);
  color: var(--ink-faint);
  font-size: .72rem;
}
.sub-footer nav { display: flex; flex-wrap: wrap; gap: .8rem; }

@media (max-width: 760px) {
  .subnav-links a { display: none; }
  .sub-hero { min-height: 0; grid-template-columns: 1fr; }
  .hero-mark { display: none; }
  .verify-grid, .two-card-grid, .doc-layout { grid-template-columns: 1fr; }
  .doc-nav { position: static; display: flex; overflow-x: auto; padding-bottom: .25rem; }
  .doc-nav a { flex: 0 0 auto; background: var(--card); }
  .math-steps { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .subnav-inner, .subpage-shell, .sub-footer { width: min(100% - 1rem, 70rem); }
  .subpage-shell { padding-top: .75rem; }
  .sub-hero { padding: 1.4rem; border-radius: .9rem; }
  .sub-hero h1 { font-size: 2.35rem; }
  .content-card { padding: 1rem; border-radius: .8rem; }
  .sub-footer { flex-direction: column; }
}