/* ==========================================================================
   星空赛事 · 共享外壳样式  /assets/site.css
   01 reset  02 tokens  03 typography  04 containers  05 header rail
   06 footer  07 buttons  08 components  09 motion  10 responsive/motion
   ========================================================================== */

/* 01 reset ---------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, p, ol, ul, li, figure, blockquote, dl, dd { margin: 0; }
ol, ul { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

/* 02 tokens --------------------------------------------------------------- */
:root {
  --deep: #05060E;
  --nebula: #0B1024;
  --orbit: #141A38;
  --line: #2A3358;
  --violet: #7A5CF5;
  --cyan: #21E6C1;
  --gold: #F2B23C;
  --alert: #FF6B7A;
  --ink: #E8ECFF;
  --muted: #A6B0D6;

  --r-lg: 26px;
  --r-md: 20px;
  --r-pill: 999px;

  --rail-w: 17.5rem;
  --bar-h: 4.5rem;

  --ease: cubic-bezier(.22, .7, .28, 1);
  --font-head: "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", "Courier New", monospace;
}

/* 03 typography ----------------------------------------------------------- */
body {
  font-family: var(--font-body);
  font-size: clamp(.95rem, .32vw + .87rem, 1.03rem);
  line-height: 1.75;
  color: var(--ink);
  background-color: var(--deep);
  min-height: 100vh;
  overflow-x: hidden;
  padding-top: var(--bar-h);
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(58rem 38rem at 84% -12%, rgba(122, 92, 245, .30), transparent 68%),
    radial-gradient(44rem 30rem at 4% 18%, rgba(33, 230, 193, .12), transparent 70%),
    radial-gradient(38rem 26rem at 62% 108%, rgba(242, 178, 60, .10), transparent 72%);
}
h1, h2, h3, h4, h5 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -.02em;
}
h1 { font-size: clamp(2rem, 4.4vw, 3.6rem); font-weight: 900; }
h2 { font-size: clamp(1.45rem, 2.6vw, 2.1rem); }
h3 { font-size: clamp(1.12rem, 1.5vw, 1.32rem); font-weight: 700; }
h4 { font-size: 1rem; font-weight: 700; }
::selection { background: rgba(122, 92, 245, .45); color: #fff; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 6px; }
.mono { font-family: var(--font-mono); letter-spacing: .02em; }

/* 04 containers ----------------------------------------------------------- */
.wrap {
  width: min(100%, 68rem);
  margin-inline: 0 auto;
  padding-inline: clamp(1rem, 4vw, 2.5rem);
}
.site-main {
  display: block;
  padding-block: clamp(1.5rem, 4vw, 2.75rem) clamp(3rem, 6vw, 5rem);
}
#main-content { scroll-margin-top: calc(var(--bar-h) + 1rem); }
.prose { max-width: 44rem; }
.prose > p { max-width: 38em; }
.prose > p + p { margin-top: 1.2em; }

.section { padding-block: clamp(2rem, 5vw, 3.5rem); }
.section--nebula {
  background: linear-gradient(180deg, transparent, rgba(11, 16, 36, .95) 12%, rgba(11, 16, 36, .95) 88%, transparent);
}
.section__eyebrow {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--violet);
  text-transform: uppercase;
}
.section__title { margin-top: .5rem; margin-bottom: .8rem; }
.section__lead {
  font-size: clamp(1.02rem, 1.4vw, 1.2rem);
  font-weight: 500;
  line-height: 1.7;
  color: var(--ink);
  max-width: 38em;
}

.grid { display: grid; gap: clamp(1rem, 2vw, 1.5rem); grid-template-columns: 1fr; }

/* 05 header --------------------------------------------------------------- */
.skip-link {
  position: fixed;
  top: .6rem;
  left: .6rem;
  z-index: 200;
  transform: translateY(-220%);
  padding: .6rem 1.05rem;
  border-radius: var(--r-pill);
  background: var(--cyan);
  color: #04140f;
  font-weight: 700;
  font-size: .85rem;
  transition: transform .18s var(--ease);
}
.skip-link:focus { transform: none; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(11, 16, 36, .97), rgba(5, 6, 14, .94));
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.site-header__bar {
  position: relative;
  z-index: 59;
  display: flex;
  align-items: center;
  gap: .75rem;
  min-height: var(--bar-h);
  padding: .55rem clamp(1rem, 4vw, 1.5rem);
}

.brand { display: flex; align-items: center; gap: .7rem; flex: 1 1 auto; min-width: 0; }
.brand__mark {
  position: relative;
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 30%, var(--cyan), rgba(33, 230, 193, 0) 58%),
    linear-gradient(140deg, var(--violet), #241a6e);
  box-shadow: 0 0 18px rgba(122, 92, 245, .55);
}
.brand__mark::after {
  content: "";
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  border: 1px solid rgba(33, 230, 193, .5);
  transform: rotate(-22deg) scaleY(.38);
}
.brand__text { display: flex; flex-direction: column; min-width: 0; }
.brand__name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.02rem;
  line-height: 1.25;
  letter-spacing: .01em;
  white-space: nowrap;
}
.brand__tagline {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.status-badge {
  display: none;
  align-items: center;
  gap: .4rem;
  padding: .3rem .75rem;
  border-radius: var(--r-pill);
  border: 1px solid rgba(33, 230, 193, .35);
  background: rgba(33, 230, 193, .09);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .05em;
  white-space: nowrap;
}
.status-badge__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
  animation: statusPulse 2.6s ease-in-out infinite;
}
@keyframes statusPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .45; transform: scale(.78); }
}
@media (min-width: 600px) { .status-badge { display: inline-flex; } }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  flex: none;
  padding: .5rem .85rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: rgba(20, 26, 56, .75);
  color: var(--ink);
  font-size: .78rem;
  transition: border-color .16s var(--ease), background .16s var(--ease);
}
.nav-toggle:hover { border-color: rgba(33, 230, 193, .45); background: rgba(33, 230, 193, .10); }
.nav-toggle__text {
  font-family: var(--font-mono);
  letter-spacing: .12em;
  font-size: .72rem;
}
.nav-toggle__bars { position: relative; width: 16px; height: 11px; flex: none; }
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: top .2s var(--ease), transform .2s var(--ease);
}
.nav-toggle__bars::before { top: 1px; }
.nav-toggle__bars::after { top: 8px; }
.site-header[data-open="true"] .nav-toggle__bars::before { top: 4.5px; transform: rotate(45deg); }
.site-header[data-open="true"] .nav-toggle__bars::after { top: 4.5px; transform: rotate(-45deg); }

.rail {
  position: fixed;
  top: var(--bar-h);
  bottom: 0;
  left: 0;
  z-index: 58;
  width: min(86vw, 20rem);
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1.1rem 2rem;
  background: linear-gradient(180deg, var(--nebula), var(--deep));
  border-right: 1px solid var(--line);
  overflow-y: auto;
  overscroll-behavior: contain;
  transform: translateX(-104%);
  transition: transform .32s var(--ease);
}
.site-header[data-open="true"] .rail { transform: none; }

.rail-scrim {
  position: fixed;
  inset: 0;
  z-index: 57;
  background: rgba(5, 6, 14, .72);
  opacity: 0;
  visibility: hidden;
  transition: opacity .28s var(--ease), visibility .28s var(--ease);
}
.site-header[data-open="true"] .rail-scrim { opacity: 1; visibility: visible; }

.rail__note {
  font-family: var(--font-mono);
  font-size: .68rem;
  line-height: 1.7;
  letter-spacing: .05em;
  color: var(--muted);
  padding-bottom: .9rem;
  border-bottom: 1px dashed rgba(42, 51, 88, .95);
}
.rail__list { display: flex; flex-direction: column; gap: .2rem; margin-top: .9rem; }
.rail__link {
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .6rem .75rem;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  color: var(--muted);
  font-size: .92rem;
  font-weight: 500;
  transition: color .16s var(--ease), background .16s var(--ease), border-color .16s var(--ease), transform .16s var(--ease);
}
.rail__item:nth-child(1) .rail__link { padding-left: .8rem; }
.rail__item:nth-child(2) .rail__link { padding-left: .95rem; }
.rail__item:nth-child(3) .rail__link { padding-left: 1.1rem; }
.rail__item:nth-child(4) .rail__link { padding-left: 1.25rem; }
.rail__item:nth-child(5) .rail__link { padding-left: 1.4rem; }
.rail__item:nth-child(6) .rail__link { padding-left: 1.55rem; }
.rail__link:hover,
.rail__link:focus-visible {
  color: var(--ink);
  background: rgba(122, 92, 245, .16);
  transform: translateX(3px);
}
.rail__link[aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
  border-color: rgba(122, 92, 245, .45);
  background: linear-gradient(90deg, rgba(122, 92, 245, .30), rgba(33, 230, 193, .07));
}
.rail__num {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .06em;
  color: rgba(166, 176, 214, .6);
  flex: none;
}
.rail__link[aria-current="page"] .rail__num { color: var(--gold); }
.rail__label { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.rail__actions { display: flex; flex-direction: column; gap: .5rem; margin-top: auto; padding-top: 1.5rem; }
.rail__action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .6rem;
  padding: .55rem .9rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: rgba(20, 26, 56, .6);
  color: var(--muted);
  font-size: .79rem;
  transition: color .16s var(--ease), border-color .16s var(--ease), background .16s var(--ease);
}
.rail__action::after { content: "→"; font-family: var(--font-mono); color: var(--cyan); flex: none; }
.rail__action:hover {
  color: var(--ink);
  border-color: rgba(33, 230, 193, .45);
  background: rgba(33, 230, 193, .09);
}

.site-header__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  z-index: 59;
  height: 2px;
  background: rgba(42, 51, 88, .55);
}
.site-header__progress > span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
  box-shadow: 0 0 12px rgba(33, 230, 193, .55);
}

/* 06 footer --------------------------------------------------------------- */
.site-footer {
  margin-top: clamp(3rem, 7vw, 6rem);
  border-top: 1px solid var(--line);
  box-shadow: inset 0 1px 0 rgba(122, 92, 245, .35);
  padding-block: clamp(2.5rem, 5vw, 4rem) 1.5rem;
  background:
    radial-gradient(46rem 22rem at 10% 0%, rgba(122, 92, 245, .18), transparent 70%),
    linear-gradient(180deg, var(--nebula), var(--deep));
}
.site-footer__inner {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}
.site-footer__name {
  font-family: var(--font-head);
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: .01em;
}
.site-footer__tagline {
  margin-top: .5rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--cyan);
}
.footnav {
  display: grid;
  gap: 1.6rem;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
}
.footnav__title {
  position: relative;
  margin-bottom: .9rem;
  padding-bottom: .55rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--gold);
}
.footnav__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 2rem;
  height: 1px;
  background: var(--line);
}
.footnav__list { display: flex; flex-direction: column; gap: .55rem; }
.footnav__link {
  color: var(--muted);
  font-size: .9rem;
  transition: color .16s var(--ease), padding-left .16s var(--ease);
}
.footnav__link:hover { color: var(--cyan); padding-left: .25rem; }

.site-footer__contact {
  margin-top: 2.6rem;
  padding-top: 1.75rem;
  border-top: 1px dashed rgba(42, 51, 88, .95);
}
.footcontact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem .8rem;
  font-size: .85rem;
  color: var(--muted);
}
.footcontact + .footcontact { margin-top: .75rem; }
.footcontact__label {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  padding: .15rem .6rem;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  color: var(--muted);
}
.footcontact__value {
  font-family: var(--font-mono);
  color: var(--ink);
  letter-spacing: .01em;
  overflow-wrap: anywhere;
}
.copy-btn {
  padding: .25rem .75rem;
  border-radius: var(--r-pill);
  border: 1px solid rgba(33, 230, 193, .35);
  background: rgba(33, 230, 193, .07);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .05em;
  transition: background .16s var(--ease), border-color .16s var(--ease);
}
.copy-btn:hover { background: rgba(33, 230, 193, .18); border-color: rgba(33, 230, 193, .6); }
.site-footer__note {
  margin-top: 1.3rem;
  max-width: 52ch;
  font-size: .8rem;
  line-height: 1.75;
  color: var(--muted);
}
.site-footer__base {
  margin-top: 2rem;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(42, 51, 88, .7);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: .5rem 1.25rem;
}
.footlegal {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--muted);
}

/* 07 buttons -------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .62rem 1.15rem;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-size: .88rem;
  font-weight: 600;
  letter-spacing: .02em;
  transition: transform .16s var(--ease), background .16s var(--ease), border-color .16s var(--ease), color .16s var(--ease);
}
.btn--primary {
  background: linear-gradient(120deg, var(--violet), #5a3fe0);
  color: #fff;
  box-shadow: 0 12px 28px -16px rgba(122, 92, 245, .95);
}
.btn--primary:hover { transform: translateY(-2px); }
.btn--ghost { border-color: var(--line); background: rgba(20, 26, 56, .6); color: var(--ink); }
.btn--ghost:hover { border-color: rgba(33, 230, 193, .5); color: var(--cyan); }
.btn--quiet { color: var(--muted); padding-inline: .6rem; }
.btn--quiet:hover { color: var(--cyan); }

/* 08 components ----------------------------------------------------------- */
.card {
  position: relative;
  overflow: hidden;
  padding: clamp(1.1rem, 2.2vw, 1.5rem);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(20, 26, 56, .92), rgba(11, 16, 36, .92));
}
.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(122, 92, 245, .75), transparent);
}
.card--flat { background: var(--orbit); }
.card__meta {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--muted);
}
.card__title { margin-top: .5rem; font-size: 1.1rem; font-weight: 700; }
.card__body { margin-top: .55rem; font-size: .92rem; color: var(--muted); }

.chips { display: flex; flex-wrap: wrap; gap: .5rem; }
.chip {
  padding: .4rem .9rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: rgba(20, 26, 56, .6);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .04em;
  transition: color .16s var(--ease), border-color .16s var(--ease), background .16s var(--ease);
}
.chip:hover { color: var(--ink); border-color: rgba(122, 92, 245, .6); }
.chip[aria-pressed="true"] {
  color: #06131a;
  font-weight: 700;
  border-color: transparent;
  background: linear-gradient(120deg, var(--violet), var(--cyan));
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .2rem .62rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: rgba(20, 26, 56, .6);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .05em;
}
.badge--cyan { color: var(--cyan); border-color: rgba(33, 230, 193, .4); background: rgba(33, 230, 193, .1); }
.badge--gold { color: var(--gold); border-color: rgba(242, 178, 60, .4); background: rgba(242, 178, 60, .1); }
.badge--alert { color: var(--alert); border-color: rgba(255, 107, 122, .45); background: rgba(255, 107, 122, .1); }

.crumbs { padding-block: 1rem; font-size: .78rem; }
.crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  letter-spacing: .04em;
  color: var(--muted);
}
.crumbs__list li:not(:last-child)::after { content: "/"; margin-left: .5rem; color: var(--line); }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--cyan); }
.crumbs [aria-current="page"] { color: var(--ink); }

.idxlist { display: flex; flex-direction: column; border-top: 1px solid var(--line); }
.idxlist__item {
  display: flex;
  align-items: baseline;
  gap: .9rem;
  padding: .85rem .25rem;
  border-bottom: 1px solid rgba(42, 51, 88, .6);
  transition: background .16s var(--ease), padding-left .16s var(--ease);
}
.idxlist__item:hover { background: rgba(122, 92, 245, .08); padding-left: .7rem; }
.idxlist__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--gold);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(11, 16, 36, .6);
}
.table { min-width: 36rem; font-size: .88rem; }
.table th, .table td { padding: .75rem .9rem; text-align: left; border-bottom: 1px solid rgba(42, 51, 88, .7); }
.table th {
  position: sticky;
  top: 0;
  background: rgba(20, 26, 56, .95);
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--muted);
}
.table tr:last-child td { border-bottom: 0; }
.num { font-family: var(--font-mono); color: var(--gold); letter-spacing: .02em; }

.stardiv {
  position: relative;
  display: block;
  height: 1px;
  margin-block: clamp(2rem, 5vw, 3.5rem);
  background: linear-gradient(90deg, transparent, var(--line) 12%, var(--line) 88%, transparent);
}
.stardiv::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  transform: translate(-50%, -50%) rotate(45deg);
  box-shadow: 0 0 14px rgba(33, 230, 193, .7);
}

.figure { margin: 0; }
.figure__frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  aspect-ratio: 16 / 9;
  background:
    radial-gradient(3px 3px at 18% 22%, rgba(232, 236, 255, .95), transparent 62%),
    radial-gradient(2px 2px at 63% 34%, rgba(232, 236, 255, .70), transparent 62%),
    radial-gradient(2px 2px at 82% 68%, rgba(33, 230, 193, .85), transparent 62%),
    radial-gradient(2px 2px at 36% 78%, rgba(242, 178, 60, .80), transparent 62%),
    radial-gradient(2px 2px at 8% 58%, rgba(232, 236, 255, .55), transparent 62%),
    radial-gradient(120% 82% at 50% 132%, rgba(33, 230, 193, 0) 64%, rgba(33, 230, 193, .35) 65%, rgba(33, 230, 193, 0) 66%),
    radial-gradient(90% 70% at 50% 128%, rgba(122, 92, 245, .55), transparent 70%),
    linear-gradient(180deg, #0B1024 0%, #05060E 100%);
}
.figure__frame > img,
.figure__frame > video { width: 100%; height: 100%; object-fit: cover; }
.figure--wide .figure__frame { aspect-ratio: 21 / 9; }
.figure--square .figure__frame { aspect-ratio: 1 / 1; }
.figure--portrait .figure__frame { aspect-ratio: 3 / 4; }
.figure__cap {
  margin-top: .6rem;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .04em;
  color: var(--muted);
}

.stat { display: flex; flex-direction: column; gap: .15rem; }
.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--gold);
}
.stat__label { font-size: .78rem; color: var(--muted); }

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  z-index: 120;
  padding: .55rem 1.15rem;
  border-radius: var(--r-pill);
  border: 1px solid rgba(33, 230, 193, .45);
  background: rgba(33, 230, 193, .14);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .04em;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translate(-50%, 1.2rem);
  transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s var(--ease);
}
.toast[data-visible="true"] { opacity: 1; visibility: visible; transform: translate(-50%, 0); }

.totop {
  position: fixed;
  right: 1.1rem;
  bottom: 1.2rem;
  z-index: 110;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(20, 26, 56, .88);
  color: var(--cyan);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s var(--ease), border-color .16s var(--ease);
}
.totop::before { content: "↑"; font-family: var(--font-mono); font-size: 1rem; }
.totop[data-visible="true"] { opacity: 1; visibility: visible; transform: none; }
.totop:hover { border-color: rgba(33, 230, 193, .55); }

/* 09 motion --------------------------------------------------------------- */
@keyframes scoreGlow {
  0% { filter: brightness(1); }
  30% { filter: brightness(1.75) drop-shadow(0 0 10px rgba(242, 178, 60, .6)); }
  100% { filter: brightness(1); }
}
.has-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .32s ease-out, transform .32s ease-out;
}
.has-reveal [data-reveal][data-revealed="true"] { opacity: 1; transform: none; }
[data-reveal][data-revealed="true"] .stat__value { animation: scoreGlow .9s ease-out both; }

/* 10 responsive ----------------------------------------------------------- */
@media (min-width: 640px) {
  .grid--2, .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-footer__inner { grid-template-columns: minmax(13rem, 1fr) 2fr; gap: 2.5rem; }
}
@media (min-width: 1024px) {
  body { padding-top: 0; padding-left: var(--rail-w); }
  .site-header {
    right: auto;
    bottom: 0;
    width: var(--rail-w);
    display: flex;
    flex-direction: column;
    border-bottom: 0;
    border-right: 1px solid var(--line);
    background: linear-gradient(180deg, var(--nebula), var(--deep) 62%);
  }
  .site-header__bar {
    flex-direction: column;
    align-items: flex-start;
    gap: .7rem;
    min-height: 0;
    padding: 1.4rem 1.4rem .9rem;
  }
  .brand { flex: 0 0 auto; width: 100%; }
  .nav-toggle { display: none; }
  .rail-scrim { display: none; }
  .rail {
    position: static;
    width: auto;
    flex: 1 1 auto;
    padding: .4rem 1.4rem 1.6rem;
    border-right: 0;
    background: none;
    transform: none;
  }
  .rail__note { padding-bottom: .8rem; }
  .rail__actions { padding-top: 1.5rem; }
  .totop { right: 2rem; bottom: 2rem; }
}
@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .status-badge__dot { animation: none; }
  .has-reveal [data-reveal] { transform: none; transition: opacity .15s linear; }
  [data-reveal][data-revealed="true"] .stat__value { animation: none; }
  .rail, .rail-scrim, .toast, .totop, .nav-toggle__bars::before, .nav-toggle__bars::after {
    transition-duration: .15s;
  }
}