/* ==========================================================================
   加加赛事 / site.css — 共享外壳与通用组件
   堆叠画板 · 斜切动势 · 矿物色纸感 + 赛场高能强调
   ========================================================================== */

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h, 78px) + 18px);
}

body,
h1, h2, h3, h4, h5, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; }
[hidden] { display: none !important; }
main { display: block; }
main:focus { outline: none; }

/* ---------- tokens ---------- */
:root {
  --c-red: #C92B21;
  --c-red-bright: #F04A3A;
  --c-navy: #0B1F3A;
  --c-slate: #1C2A3A;
  --c-paper: #F6F1E7;
  --c-rock: #5E645F;
  --c-moss: #3F6B4F;
  --c-clay: #9E4A2E;
  --c-lime: #B6F04A;
  --c-orange: #FF8A2A;

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --header-h: 78px;
  --shell-max: 1280px;
  --gutter: clamp(18px, 4vw, 40px);
  --r-sm: 2px;
  --r-md: 6px;
  --ease: cubic-bezier(.22, .68, .24, 1);
  --shadow-panel: 0 30px 60px -42px rgba(11, 31, 58, .6);
}

@media (max-width: 1023px) {
  :root { --header-h: 64px; }
}

/* ---------- base ---------- */
body {
  min-height: 100vh;
  background-color: var(--c-paper);
  background-image:
    radial-gradient(circle at 88% -6%, rgba(201, 43, 33, .10), transparent 52%),
    repeating-linear-gradient(116deg, rgba(94, 100, 95, .045) 0 1px, transparent 1px 28px);
  color: var(--c-navy);
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: .01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body.is-locked { overflow: hidden; }

:focus-visible {
  outline: 3px solid var(--c-red);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

.site-header[data-solid="true"] :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--c-lime);
}

/* ---------- layout helpers ---------- */
.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.shell--narrow { max-width: 880px; }

.page-top { padding-top: calc(var(--header-h) + clamp(24px, 5vw, 56px)); }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }

@media (max-width: 1023px) {
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9 { grid-column: span 12; }
}

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 400;
  padding: 12px 20px;
  background: var(--c-navy);
  color: var(--c-paper);
  border-left: 4px solid var(--c-lime);
  border-radius: var(--r-sm);
  font: 600 14px/1 var(--font-sans);
  letter-spacing: .05em;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform .2s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

/* ---------- buttons ---------- */
.btn {
  --btn-bg: transparent;
  --btn-ink: currentColor;
  --btn-line: transparent;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55em;
  padding: 13px 22px;
  border: 1.5px solid var(--btn-line);
  border-radius: var(--r-sm);
  background: var(--btn-bg);
  color: var(--btn-ink);
  font: 600 15px/1 var(--font-sans);
  letter-spacing: .05em;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  overflow: hidden;
  transition: transform .18s var(--ease), background-color .18s var(--ease),
              color .18s var(--ease), border-color .18s var(--ease);
}

.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 32%, rgba(255, 255, 255, .34) 48%, transparent 64%);
  transform: translateX(-125%);
  transition: transform .5s var(--ease);
  pointer-events: none;
}

.btn:hover::after { transform: translateX(125%); }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--flare {
  --btn-bg: var(--c-red);
  --btn-line: var(--c-red);
  --btn-ink: var(--c-paper);
}
.btn--flare:hover {
  --btn-bg: var(--c-red-bright);
  --btn-line: var(--c-red-bright);
}

.btn--line {
  --btn-bg: transparent;
  --btn-line: currentColor;
  --btn-ink: currentColor;
}
.btn--line:hover { --btn-bg: rgba(11, 31, 58, .08); }

.site-header[data-solid="true"] .btn--line:hover,
.footer-slab .btn--line:hover { --btn-bg: rgba(246, 241, 231, .14); }

.btn--lime {
  --btn-bg: var(--c-lime);
  --btn-line: var(--c-lime);
  --btn-ink: var(--c-navy);
}
.btn--lime:hover { --btn-bg: #c8ff66; --btn-line: #c8ff66; }

.btn--sm { padding: 10px 16px; font-size: 13px; }

/* ---------- header ---------- */
.site-header {
  --hd-ink: var(--c-navy);
  --hd-line: rgba(11, 31, 58, .16);
  --hd-accent: var(--c-red);
  position: sticky;
  top: 0;
  z-index: 120;
  margin-bottom: calc(var(--header-h) * -1);
  background: transparent;
  color: var(--hd-ink);
  transition: background-color .3s var(--ease), color .3s var(--ease), box-shadow .3s var(--ease);
}

.site-header[data-solid="true"] {
  --hd-ink: var(--c-paper);
  --hd-line: rgba(246, 241, 231, .18);
  --hd-accent: var(--c-lime);
  background: var(--c-navy);
  box-shadow: 0 26px 52px -34px rgba(11, 31, 58, .92);
}

body[data-hero="dark"] .site-header:not([data-solid="true"]) {
  --hd-ink: var(--c-paper);
  --hd-line: rgba(246, 241, 231, .22);
  --hd-accent: var(--c-lime);
}

/* 抽屉遮罩 */
.site-header::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background: rgba(11, 31, 58, .58);
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s var(--ease);
}

.site-header[data-open="true"]::after { opacity: 1; pointer-events: auto; }

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 34px);
  height: var(--header-h);
}

/* ---------- brand ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  padding-block: 6px;
  color: inherit;
  text-decoration: none;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  background: linear-gradient(142deg, var(--c-red) 0%, var(--c-red-bright) 100%);
  color: var(--c-paper);
  font: 700 15px/1 var(--font-mono);
  letter-spacing: .06em;
  clip-path: polygon(0 0, 100% 0, 100% 74%, 74% 100%, 0 100%);
  transition: transform .25s var(--ease);
}

.brand:hover .brand__mark { transform: skewX(-8deg) translateY(-1px); }

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.brand__name {
  font: 900 20px/1.05 var(--font-sans);
  letter-spacing: .02em;
  transform: skewX(-3deg);
  transform-origin: left center;
}

.brand__domain {
  font: 600 10px/1 var(--font-mono);
  letter-spacing: .16em;
  color: currentColor;
  opacity: .62;
}

/* ---------- navigation ---------- */
.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.3vw, 20px);
}

.site-nav__item { display: block; }

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 10px 4px;
  color: inherit;
  font: 500 15px/1 var(--font-sans);
  letter-spacing: .05em;
  text-decoration: none;
  transition: color .2s var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 2px;
  right: 2px;
  bottom: 1px;
  height: 3px;
  background: var(--hd-accent);
  transform: scaleX(0) skewX(-18deg);
  transform-origin: left center;
  transition: transform .26s var(--ease), background-color .2s var(--ease);
}

.site-nav__link:hover,
.site-nav__link:focus-visible { color: var(--hd-accent); }

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after { transform: scaleX(1) skewX(-18deg); }

.site-nav__link[aria-current="page"] { color: var(--hd-accent); }

.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1) skewX(-18deg);
  background: var(--c-red-bright);
}

.site-header[data-solid="true"] .site-nav__link[aria-current="page"]::after {
  background: var(--c-lime);
}

.site-nav__foot { display: none; }

/* ---------- header tools ---------- */
.header-tools {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  flex: 0 0 auto;
}

.header-tools__ghost { display: none; }

@media (min-width: 1200px) {
  .header-tools__ghost { display: inline-flex; }
}

/* ---------- nav toggle ---------- */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1.5px solid var(--hd-line);
  border-radius: var(--r-sm);
  background: transparent;
  color: inherit;
  cursor: pointer;
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.nav-toggle:hover { border-color: var(--hd-accent); }

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  transition: transform .26s var(--ease), opacity .2s var(--ease);
}

.site-header[data-open="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.site-header[data-open="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- read rail ---------- */
.read-rail {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  overflow: hidden;
  pointer-events: none;
}

.read-rail__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--c-red) 0%, var(--c-orange) 58%, var(--c-lime) 100%);
  transition: width .12s linear;
}

.site-header[data-solid="true"] .read-rail { background: rgba(246, 241, 231, .16); }

/* ---------- mobile drawer ---------- */
@media (max-width: 1023px) {
  .header-tools .btn { display: none; }
  .nav-toggle { display: flex; }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: auto;
    z-index: 2;
    width: min(86vw, 360px);
    padding: calc(var(--header-h) + 30px) 26px 30px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: 26px;
    background: var(--c-navy);
    color: var(--c-paper);
    clip-path: polygon(14% 0, 100% 0, 100% 100%, 0 100%);
    box-shadow: -30px 0 70px -34px rgba(11, 31, 58, .9);
    overflow-y: auto;
    transform: translateX(103%);
    transition: transform .34s var(--ease);
  }

  .site-header[data-open="true"] .site-nav { transform: translateX(0); }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__link {
    display: block;
    padding: 16px 2px;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: .06em;
    border-bottom: 1px solid rgba(246, 241, 231, .16);
  }

  .site-nav__link::after { display: none; }

  .site-nav__link:hover,
  .site-nav__link:focus-visible { color: var(--c-lime); }

  .site-nav__link[aria-current="page"] {
    color: var(--c-lime);
    border-bottom-color: var(--c-lime);
  }

  .site-nav__foot {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: auto;
  }

  .site-nav__foot .btn { width: 100%; }
}

@media (min-width: 1024px) {
  .site-nav__foot { display: none; }
}

/* ---------- footer ---------- */
.site-footer {
  margin-top: clamp(56px, 8vw, 110px);
  color: var(--c-paper);
}

.footer-slab {
  position: relative;
  padding: clamp(64px, 9vw, 122px) 0 clamp(26px, 4vw, 44px);
  background: var(--c-navy);
  clip-path: polygon(0 clamp(26px, 4vw, 54px), 100% 0, 100% 100%, 0 100%);
  overflow: hidden;
}

.footer-slash {
  position: absolute;
  top: clamp(46px, 7vw, 92px);
  right: clamp(18px, 6vw, 90px);
  width: clamp(90px, 14vw, 180px);
  height: 6px;
  background: linear-gradient(90deg, var(--c-lime), var(--c-orange));
  transform: skewX(-24deg);
  opacity: .9;
  pointer-events: none;
}

.footer-inner { position: relative; z-index: 2; }

.footer-lead {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  align-items: end;
  gap: clamp(24px, 4vw, 60px);
  padding-bottom: clamp(30px, 4vw, 52px);
  border-bottom: 1px solid rgba(246, 241, 231, .16);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-statement {
  max-width: 24ch;
  font: 600 clamp(21px, 2.6vw, 32px)/1.3 var(--font-serif);
  letter-spacing: .02em;
  color: var(--c-paper);
}

.footer-statement::after {
  content: "";
  display: block;
  width: 56px;
  height: 4px;
  margin-top: 16px;
  background: var(--c-clay);
  transform: skewX(-24deg);
}

.footer-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)) 1.35fr;
  gap: clamp(20px, 3vw, 44px);
  padding-block: clamp(30px, 4vw, 52px);
}

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 8px;
  font: 600 12px/1 var(--font-mono);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-lime);
}

.footer-col__title::before {
  content: "";
  width: 10px;
  height: 3px;
  background: var(--c-orange);
  transform: skewX(-20deg);
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 18px;
}

.footer-col__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: rgba(246, 241, 231, .78);
  font-size: 15px;
  text-decoration: none;
  transition: color .18s var(--ease), transform .18s var(--ease);
}

.footer-col__link::before {
  content: "";
  width: 8px;
  height: 2px;
  background: var(--c-clay);
  transform: skewX(-20deg);
  transition: width .2s var(--ease), background-color .2s var(--ease);
}

.footer-col__link:hover,
.footer-col__link:focus-visible {
  color: var(--c-paper);
  transform: translateX(2px);
}

.footer-col__link:hover::before,
.footer-col__link:focus-visible::before {
  width: 18px;
  background: var(--c-lime);
}

/* 联系说明牌 */
.contact-plate {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--c-slate);
  border: 1px solid rgba(246, 241, 231, .14);
  border-radius: var(--r-sm);
  box-shadow: var(--shadow-panel);
}

.contact-plate__title {
  font: 600 12px/1 var(--font-mono);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-orange);
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact-row {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "key key"
    "value copy";
  gap: 5px 12px;
  align-items: center;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(246, 241, 231, .18);
}

.contact-row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.contact-key {
  grid-area: key;
  font: 600 11px/1 var(--font-mono);
  letter-spacing: .14em;
  color: rgba(246, 241, 231, .58);
}

.contact-value {
  grid-area: value;
  font-size: 14px;
  line-height: 1.55;
  color: var(--c-paper);
  overflow-wrap: anywhere;
}

.copy-btn {
  grid-area: copy;
  padding: 7px 12px;
  border: 1px solid var(--c-lime);
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--c-lime);
  font: 600 11px/1 var(--font-mono);
  letter-spacing: .12em;
  cursor: pointer;
  transition: background-color .18s var(--ease), color .18s var(--ease), transform .18s var(--ease);
}

.copy-btn:hover {
  background: var(--c-lime);
  color: var(--c-navy);
  transform: translateY(-1px);
}

.copy-btn[data-state="done"] {
  background: var(--c-lime);
  border-color: var(--c-lime);
  color: var(--c-navy);
}

/* footer meta */
.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 26px;
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid rgba(246, 241, 231, .16);
  font-size: 13px;
  line-height: 1.6;
  color: rgba(246, 241, 231, .64);
}

.footer-meta__legal { letter-spacing: .04em; }

.footer-meta__note { font-family: var(--font-mono); font-size: 12px; letter-spacing: .04em; }

.to-top {
  padding: 9px 16px;
  border: 1.5px solid rgba(246, 241, 231, .32);
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--c-paper);
  font: 600 12px/1 var(--font-sans);
  letter-spacing: .12em;
  cursor: pointer;
  transition: border-color .18s var(--ease), color .18s var(--ease), transform .18s var(--ease);
}

.to-top:hover {
  border-color: var(--c-lime);
  color: var(--c-lime);
  transform: translateY(-2px);
}

@media (max-width: 1023px) {
  .footer-lead { grid-template-columns: 1fr; align-items: start; }
  .footer-cta { justify-content: flex-start; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-plate { grid-column: 1 / -1; }
}

@media (max-width: 599px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-meta { flex-direction: column; align-items: flex-start; }
}

/* ---------- panels ---------- */
.panel {
  position: relative;
  padding: clamp(22px, 3vw, 36px);
  background: var(--c-paper);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-panel);
}

.panel--paper { border: 1px solid rgba(94, 100, 95, .24); }

.panel--slate {
  background: var(--c-slate);
  color: var(--c-paper);
  border: 1px solid rgba(246, 241, 231, .12);
}

.panel--navy {
  background: var(--c-navy);
  color: var(--c-paper);
}

/* ---------- labels & headings ---------- */
.eyebrow {
  font: 600 12px/1 var(--font-mono);
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--c-rock);
}

.exhibit-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  border: 1px solid var(--c-clay);
  border-radius: 1px;
  background: transparent;
  color: var(--c-clay);
  font: 600 11px/1 var(--font-mono);
  letter-spacing: .14em;
  text-transform: uppercase;
  white-space: nowrap;
}

.exhibit-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  background: currentColor;
  transform: rotate(45deg);
}

.exhibit-tag--lime { border-color: var(--c-lime); color: var(--c-lime); }
.exhibit-tag--moss { border-color: var(--c-moss); color: var(--c-moss); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 10px 18px;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.section-head__title {
  font: 900 clamp(28px, 4vw, 46px)/1.08 var(--font-sans);
  letter-spacing: .01em;
  transform: skewX(-3deg);
  transform-origin: left center;
}

.slash-rule {
  height: 3px;
  border: 0;
  background: linear-gradient(90deg, var(--c-red), var(--c-clay) 42%, var(--c-rock) 72%, transparent);
  transform: skewX(-30deg);
  transform-origin: left center;
}

/* ---------- breadcrumbs ---------- */
.breadcrumbs { margin-block: clamp(18px, 3vw, 30px); }

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  font: 500 12px/1.5 var(--font-mono);
  letter-spacing: .08em;
}

.breadcrumbs__item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--c-rock);
}

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  color: var(--c-clay);
}

.breadcrumbs__link {
  color: var(--c-navy);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.breadcrumbs__link:hover,
.breadcrumbs__link:focus-visible {
  color: var(--c-red);
  border-bottom-color: var(--c-red);
}

/* ---------- prose ---------- */
.prose {
  max-width: 70ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--c-navy);
}

.prose > * + * { margin-top: 1.1em; }

.prose h2 {
  font: 900 clamp(25px, 3.2vw, 36px)/1.16 var(--font-sans);
  transform: skewX(-2deg);
  transform-origin: left center;
}

.prose h3 { font: 700 22px/1.32 var(--font-sans); }

.prose a {
  color: var(--c-red);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose ul {
  display: flex;
  flex-direction: column;
  gap: .5em;
}

.prose li {
  position: relative;
  padding-left: 20px;
}

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 8px;
  height: 3px;
  background: var(--c-clay);
  transform: skewX(-20deg);
}

.prose blockquote {
  padding-left: 20px;
  border-left: 3px solid var(--c-red);
  font: 600 20px/1.6 var(--font-serif);
  color: var(--c-slate);
}

/* ---------- media frame ---------- */
.media-frame {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border-radius: var(--r-md);
  background-color: var(--c-rock);
  background-image:
    repeating-linear-gradient(135deg, rgba(11, 31, 58, .16) 0 10px, rgba(11, 31, 58, .04) 10px 20px);
  box-shadow: var(--shadow-panel);
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.08) contrast(1.04);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(118deg,
    transparent 0 62%,
    rgba(11, 31, 58, .32) 62% 62.9%,
    transparent 62.9% 100%);
  pointer-events: none;
  z-index: 1;
}

.media-frame__caption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 2;
  padding: 7px 10px;
  background: var(--c-navy);
  color: var(--c-paper);
  border-radius: 1px;
  font: 600 11px/1 var(--font-mono);
  letter-spacing: .1em;
}

.media-frame__tag {
  position: absolute;
  right: 12px;
  top: 12px;
  z-index: 2;
  padding: 6px 9px;
  background: var(--c-lime);
  color: var(--c-navy);
  font: 700 11px/1 var(--font-mono);
  letter-spacing: .08em;
  transform: skewX(-10deg);
}

/* ---------- filter bar ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.filter-btn {
  appearance: none;
  padding: 10px 16px;
  border: 1.5px solid rgba(11, 31, 58, .28);
  border-radius: 1px;
  background: transparent;
  color: var(--c-navy);
  font: 600 13px/1 var(--font-sans);
  letter-spacing: .06em;
  cursor: pointer;
  transition: background-color .18s var(--ease), color .18s var(--ease),
              border-color .18s var(--ease), transform .18s var(--ease);
}

.filter-btn:hover {
  border-color: var(--c-red);
  color: var(--c-red);
  transform: translateY(-1px);
}

.filter-btn[aria-pressed="true"] {
  background: var(--c-lime);
  border-color: var(--c-lime);
  color: var(--c-navy);
}

/* ---------- reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}

[data-reveal][data-revealed="true"] {
  opacity: 1;
  transform: none;
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}