/* =========================================================
   乐鱼赛场 /assets/site.css — 共享外壳与基础组件
   ========================================================= */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; min-height: 100vh; }
img, svg, video { display: block; max-width: 100%; height: auto; }
h1, h2, h3, h4, p, figure, blockquote { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }

/* ---------- 2. Tokens ---------- */
:root {
  --ink: #071D16;
  --pitch: #0B2E22;
  --mid: #144A35;
  --cream: #F4EBD9;
  --paper: #F7F3E8;
  --neon: #C7FF3D;
  --orange: #FF7A1A;
  --rust: #E24A2A;
  --brown: #1C1A16;
  --moss: #A9B8AE;
  --turf: #2B5C45;
  --lichen: #7FB69A;

  --wrap: 1320px;
  --gutter: clamp(18px, 4vw, 40px);
  --radius-l: 32px;
  --radius-m: 22px;
  --radius-s: 14px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);

  --font-display: "Barlow Condensed", Oswald, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- 3. Base / 中文排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.72;
  color: var(--paper);
  background-color: var(--ink);
  background-image:
    radial-gradient(110% 70% at 12% -8%, rgba(199, 255, 61, 0.10), transparent 55%),
    radial-gradient(85% 60% at 96% 2%, rgba(255, 122, 26, 0.09), transparent 62%),
    repeating-linear-gradient(94deg, rgba(43, 92, 69, 0.16) 0 1px, transparent 1px 76px);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body, .masthead__cn, .h2, .h3, .footer-brand__mark {
  word-break: break-word;
  overflow-wrap: anywhere;
}

::selection { background: var(--neon); color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-radius: 4px;
}

#main-content { scroll-margin-top: 150px; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 4. Layout helpers ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.section { padding-block: clamp(48px, 8vw, 104px); }
.section--tight { padding-block: clamp(32px, 5vw, 64px); }

.divider {
  height: 1px;
  border: 0;
  margin: clamp(24px, 4vw, 48px) 0;
  background: linear-gradient(90deg, rgba(199, 255, 61, 0.55), rgba(127, 182, 154, 0.18) 45%, transparent);
}

.grid { display: grid; gap: clamp(16px, 2.4vw, 24px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

/* ---------- 5. Typography ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--neon);
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--orange);
  flex: none;
}

.display { font-family: var(--font-display); font-weight: 700; line-height: 0.96; letter-spacing: -0.005em; }
.display--xl { font-size: clamp(56px, 9vw, 112px); }
.display--l { font-size: clamp(40px, 6vw, 72px); }
.h2 { font-family: var(--font-display); font-weight: 700; font-size: clamp(30px, 4vw, 48px); line-height: 1.06; }
.h3 { font-family: var(--font-body); font-weight: 700; font-size: 24px; line-height: 1.32; }

.data-xl {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(48px, 7vw, 96px);
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--orange);
}

.lede {
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.72;
  color: rgba(247, 243, 232, 0.82);
  max-width: 62ch;
}

.prose { font-size: 16px; line-height: 1.78; color: rgba(247, 243, 232, 0.86); }
.prose p { margin-bottom: 1em; }
.prose p:last-child { margin-bottom: 0; }
.prose a {
  color: var(--neon);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}
.prose strong { color: var(--paper); font-weight: 700; }

/* ---------- 6. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
              border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.btn--sm { padding: 9px 18px; font-size: 12px; }
.btn--neon { background: var(--neon); color: #08170F; }
.btn--neon:hover, .btn--neon:focus-visible { background: #DCFF7C; transform: translateY(-1px); }
.btn--orange { background: var(--orange); color: #20120A; }
.btn--orange:hover, .btn--orange:focus-visible { background: #FF9448; transform: translateY(-1px); }
.btn--ghost {
  background: transparent;
  border-color: rgba(127, 182, 154, 0.45);
  color: var(--paper);
}
.btn--ghost:hover, .btn--ghost:focus-visible {
  border-color: var(--neon);
  color: var(--neon);
  transform: translateY(-1px);
}

/* ---------- 7. Surfaces ---------- */
.panel {
  background: var(--cream);
  color: var(--brown);
  border-radius: var(--radius-l);
  padding: clamp(20px, 3vw, 32px);
}
.panel a { color: var(--brown); }
.panel .eyebrow { color: var(--rust); }
.panel .eyebrow::before { background: var(--rust); }
.panel .data-xl { color: var(--orange); }

.tile {
  background: var(--pitch);
  border: 1px solid rgba(127, 182, 154, 0.16);
  border-radius: var(--radius-l);
  padding: clamp(20px, 3vw, 32px);
}

/* ---------- 8. Stats / chips / segmented ---------- */
.stat { display: flex; flex-direction: column; gap: 6px; }
.stat__num {
  font-family: var(--font-mono);
  font-size: clamp(32px, 4.6vw, 56px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--orange);
}
.stat__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--moss);
}

.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid rgba(127, 182, 154, 0.34);
  background: transparent;
  color: var(--moss);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease),
              border-color 0.18s var(--ease);
}
.chip:hover, .chip:focus-visible { color: var(--paper); border-color: var(--lichen); }
.chip[aria-pressed="true"], .chip.is-active {
  background: var(--orange);
  border-color: var(--orange);
  color: #20120A;
}

.seg {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  background: rgba(20, 74, 53, 0.65);
  border: 1px solid rgba(127, 182, 154, 0.28);
}
.seg__btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--moss);
  padding: 9px 20px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
              transform 0.2s var(--ease);
}
.seg__btn:hover { color: var(--paper); }
.seg__btn[aria-selected="true"] {
  background: var(--neon);
  color: #08170F;
  transform: translateY(-1px);
}
.seg-panel { animation: segIn 0.26s var(--ease) both; }
@keyframes segIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 9. Media containers ---------- */
.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-m);
  background:
    linear-gradient(148deg, rgba(20, 74, 53, 0.95), rgba(7, 29, 22, 0.95)),
    repeating-linear-gradient(96deg, rgba(43, 92, 69, 0.5) 0 1px, transparent 1px 40px);
  aspect-ratio: 16 / 10;
  width: 100%;
}
.media img,
.media > picture,
.media > picture > img { width: 100%; height: 100%; object-fit: cover; display: block; }
.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 4 / 5; }
.media--square { aspect-ratio: 1 / 1; }
.media--scrim::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(7, 29, 22, 0) 38%, rgba(7, 29, 22, 0.78) 100%);
}

/* ---------- 10. Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--moss);
}
.breadcrumb li { display: inline-flex; align-items: center; }
.breadcrumb li::after { content: "/"; margin-left: 8px; color: var(--turf); }
.breadcrumb li:last-child::after { content: ""; margin: 0; }
.breadcrumb a { color: var(--lichen); transition: color 0.18s var(--ease); }
.breadcrumb a:hover, .breadcrumb a:focus-visible { color: var(--neon); }
.breadcrumb [aria-current="page"] { color: var(--paper); }

/* ---------- 11. Reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* =========================================================
   12. HEADER — 居中刊头
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(7, 29, 22, 0.93);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(43, 92, 69, 0.75);
}

.read-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: var(--p, 0%);
  background: linear-gradient(90deg, var(--neon), var(--orange));
  box-shadow: 0 0 14px rgba(199, 255, 61, 0.55);
  pointer-events: none;
  z-index: 2;
  transition: width 0.12s linear;
}

.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  transform: translate(-50%, -160%);
  z-index: 120;
  padding: 12px 24px;
  border-radius: 0 0 var(--radius-s) var(--radius-s);
  background: var(--neon);
  color: #08170F;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: transform 0.22s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { transform: translate(-50%, 0); outline-offset: -4px; }

.header-shell {
  position: relative;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.header-top {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
  padding: 16px 0 10px;
  border-bottom: 1px solid rgba(127, 182, 154, 0.18);
  transition: padding 0.28s var(--ease);
}

.header-utility {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 13px;
  min-width: 0;
}
.header-utility--right { justify-content: flex-end; }

.util {
  position: relative;
  color: var(--moss);
  padding-bottom: 3px;
  letter-spacing: 0.06em;
  white-space: nowrap;
  transition: color 0.18s var(--ease);
}
.util::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--neon);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease);
}
.util:hover, .util:focus-visible { color: var(--paper); }
.util:hover::after, .util:focus-visible::after { transform: scaleX(1); }

.masthead {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
  min-width: 0;
}
.masthead__cn {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.2vw, 38px);
  line-height: 1;
  letter-spacing: 0.16em;
  color: var(--paper);
  transition: font-size 0.28s var(--ease), color 0.2s var(--ease);
}
.masthead__cn::after {
  content: "";
  display: block;
  height: 3px;
  margin-top: 7px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--neon) 22%, var(--orange) 78%, transparent);
}
.masthead__tag {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--lichen);
  white-space: nowrap;
}
.masthead:hover .masthead__cn,
.masthead:focus-visible .masthead__cn { color: var(--neon); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 15px;
  border-radius: 999px;
  background: rgba(20, 74, 53, 0.7);
  border: 1px solid rgba(127, 182, 154, 0.35);
  color: var(--paper);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.nav-toggle:hover, .nav-toggle:focus-visible { border-color: var(--neon); }
.nav-toggle__lines { display: flex; flex-direction: column; gap: 4px; width: 16px; flex: none; }
.nav-toggle__lines span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--neon);
  transition: transform 0.24s var(--ease);
}
.site-header[data-open] .nav-toggle__lines span:first-child { transform: translateY(3px) rotate(45deg); }
.site-header[data-open] .nav-toggle__lines span:last-child { transform: translateY(-3px) rotate(-45deg); }

.masthead-nav { padding: 6px 0 12px; transition: padding 0.28s var(--ease); }

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(6px, 2vw, 26px);
}
.nav-item { display: block; }
.nav-link {
  position: relative;
  display: inline-block;
  padding: 9px 4px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--moss);
  transition: color 0.18s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 4px;
  right: 4px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--neon);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s var(--ease);
}
.nav-link:hover, .nav-link:focus-visible { color: var(--paper); }
.nav-link:hover::after, .nav-link:focus-visible::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--neon); }
.nav-link[aria-current="page"]::after { transform: scaleX(1); }

.nav-tools { display: none; }

/* 滚动收窄态 */
.site-header.is-condensed .header-top { padding: 8px 0 6px; }
.site-header.is-condensed .masthead__cn { font-size: clamp(20px, 2.2vw, 26px); }
.site-header.is-condensed .masthead__cn::after { margin-top: 5px; height: 2px; }
.site-header.is-condensed .masthead__tag { display: none; }
.site-header.is-condensed .masthead-nav { padding: 2px 0 9px; }

/* =========================================================
   13. FOOTER
   ========================================================= */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  padding: clamp(44px, 7vw, 84px) 0 26px;
  background: var(--pitch);
  border-top: 1px solid rgba(127, 182, 154, 0.22);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(80% 60% at 88% 0%, rgba(199, 255, 61, 0.08), transparent 62%),
    repeating-linear-gradient(102deg, rgba(43, 92, 69, 0.42) 0 1px, transparent 1px 92px);
  opacity: 0.85;
}
.footer-shell {
  position: relative;
  z-index: 1;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: clamp(24px, 4vw, 48px);
  padding-bottom: clamp(30px, 5vw, 52px);
  border-bottom: 1px solid rgba(127, 182, 154, 0.18);
}

.footer-brand__mark {
  font-family: var(--font-display);
  font-size: clamp(30px, 3.4vw, 42px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.16em;
  color: var(--paper);
}
.footer-brand__tag {
  margin-top: 12px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--lichen);
}
.footer-brand__cta { margin-top: 22px; }

.footer-col__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--neon);
}
.footer-list { display: flex; flex-direction: column; gap: 2px; }
.footer-link {
  display: inline-block;
  padding: 6px 0;
  font-size: 14px;
  color: rgba(247, 243, 232, 0.84);
  transition: color 0.18s var(--ease), transform 0.18s var(--ease);
}
.footer-link:hover, .footer-link:focus-visible { color: var(--neon); transform: translateX(3px); }

.footer-col__icp {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--moss);
}

.footer-contact {
  margin-top: clamp(28px, 4vw, 44px);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 22px 32px;
  padding: clamp(22px, 3.4vw, 36px);
  border-radius: var(--radius-l);
  background: var(--cream);
  color: var(--brown);
}
.footer-contact__label {
  margin-bottom: 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(28, 26, 22, 0.55);
}
.footer-contact__value {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--brown);
  overflow-wrap: anywhere;
}

.footer-note {
  margin-top: 18px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--moss);
}

.footer-base {
  margin-top: clamp(20px, 3vw, 30px);
  padding-top: 20px;
  border-top: 1px solid rgba(127, 182, 154, 0.16);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--moss);
}
.footer-legal { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-legal a { color: var(--lichen); transition: color 0.18s var(--ease); }
.footer-legal a:hover, .footer-legal a:focus-visible { color: var(--neon); }
.footer-base__icp { color: var(--moss); }

/* =========================================================
   14. Responsive
   ========================================================= */
@media (max-width: 1080px) {
  .header-utility { gap: 14px; }
  .masthead__tag { font-size: 11px; letter-spacing: 0.12em; }
}

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 13px 0;
  }
  .header-utility { display: none; }
  .masthead { align-items: flex-start; text-align: left; }
  .masthead__tag { display: none; }
  .nav-toggle { display: inline-flex; }

  .masthead-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 4;
    display: block;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    padding: 10px var(--gutter) 22px;
    background: var(--pitch);
    border-bottom: 1px solid rgba(127, 182, 154, 0.24);
    box-shadow: 0 26px 52px rgba(0, 0, 0, 0.5);
    transition: max-height 0.34s var(--ease), opacity 0.22s var(--ease), visibility 0.22s linear;
  }
  .site-header[data-open] .masthead-nav {
    max-height: 82vh;
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-top: 4px;
  }
  .nav-link {
    display: block;
    padding: 14px 2px;
    font-size: 15px;
    letter-spacing: 0.06em;
    border-bottom: 1px solid rgba(127, 182, 154, 0.16);
  }
  .nav-link::after { display: none; }
  .nav-link[aria-current="page"]::before {
    content: "";
    display: inline-block;
    width: 6px;
    height: 6px;
    margin-right: 10px;
    border-radius: 50%;
    background: var(--neon);
    vertical-align: middle;
  }

  .nav-tools {
    display: block;
    margin-top: 22px;
    padding-top: 18px;
    border-top: 1px dashed rgba(127, 182, 154, 0.28);
  }
  .nav-tools__label {
    margin-bottom: 10px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: var(--lichen);
  }
  .nav-tool {
    display: block;
    padding: 10px 0;
    font-size: 14px;
    color: var(--paper);
    border-bottom: 1px solid rgba(127, 182, 154, 0.12);
  }
  .nav-tool:hover, .nav-tool:focus-visible { color: var(--neon); }
  .nav-tools__cta { margin-top: 18px; width: 100%; }

  #main-content { scroll-margin-top: 96px; }
}

@media (max-width: 720px) {
  .grid--2, .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .display--xl { font-size: clamp(44px, 13vw, 72px); }
  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .footer-contact { grid-template-columns: minmax(0, 1fr); }
  .footer-base { flex-direction: column; align-items: flex-start; gap: 10px; }
  .seg { width: 100%; }
  .seg__btn { flex: 1 1 0; padding: 9px 12px; }
}

@media (max-width: 420px) {
  .masthead__cn { letter-spacing: 0.1em; }
  .nav-toggle__text { display: none; }
}

/* ---------- 15. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .read-progress { transition: none; }
  [data-reveal] { opacity: 1; transform: none; }
  .seg-panel { animation: none; }
  .btn:hover, .chip:hover, .footer-link:hover { transform: none; }
}