/* ===== Reset & Variables ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #0a1a1a;
  --bg-deep-green: #0d2b2b;
  --bg-deep-blue: #10233a;
  --card-orange: #ff6b35;
  --card-teal: #00c2a8;
  --card-yellow: #ffd166;
  --accent: #39ff14;
  --live-red: #ff3b30;
  --replay-green: #00c853;
  --updating-blue: #1e90ff;
  --tag-red: #ff3b30;
  --tag-blue: #4a90e2;
  --tag-yellow: #ffd166;
  --text-main: #f5f5f5;
  --text-sub: #b0bec5;
  --border: #2a3f3f;
  --font-head: "Arial Black", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
  --font-mono: "Roboto Mono", Consolas, "Courier New", monospace;
  --container-w: 1280px;
  --nav-break: 860px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 1.5rem;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-main);
  background:
    radial-gradient(ellipse at top right, rgba(57, 255, 20, 0.05), transparent 55%),
    radial-gradient(ellipse at bottom left, rgba(0, 194, 168, 0.05), transparent 55%),
    var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5 {
  font-family: var(--font-head);
  line-height: 1.2;
  margin: 0 0 0.5rem;
}

p {
  margin: 0 0 1rem;
}

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

a:hover {
  color: var(--card-yellow);
}

img {
  max-width: 100%;
  display: block;
}

table {
  border-collapse: collapse;
  width: 100%;
}

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

::selection {
  background: var(--card-orange);
  color: #0a1a1a;
}

/* ===== Utilities ===== */
.container {
  width: min(var(--container-w), 92vw);
  margin-inline: auto;
}

.container--narrow {
  max-width: 760px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.mono,
.mono--time {
  font-family: var(--font-mono);
}

.text-sub {
  color: var(--text-sub);
}

.section {
  padding-block: 2rem;
}

.section--green {
  background: var(--bg-deep-green);
}

.section--blue {
  background: var(--bg-deep-blue);
}

/* ===== Page title & Lead ===== */
.page-title {
  font-size: clamp(2rem, 5vw, 3.6rem);
  letter-spacing: -0.02em;
  margin: 2.5rem 0 0.6rem;
  line-height: 1.05;
}

.page-lead {
  color: var(--text-sub);
  max-width: 62ch;
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem 1rem;
  margin: 2.5rem 0 1rem;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.4rem, 2.6vw, 2rem);
}

.section-head .section-meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-sub);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.body-text {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-main);
}

.body-text a {
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.7rem 1.4rem;
  background: var(--card-orange);
  color: #0a1a1a;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  border: 0;
  cursor: pointer;
  border-radius: 2px;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
  background: var(--card-yellow);
  color: #0a1a1a;
  transform: translateY(-2px);
}

.btn:focus-visible {
  box-shadow: 0 0 0 3px rgba(57, 255, 20, 0.65);
}

.btn--teal {
  background: var(--card-teal);
}

.btn--yellow {
  background: var(--card-yellow);
}

.btn--outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
  clip-path: none;
}

.btn--outline:hover {
  background: rgba(57, 255, 20, 0.08);
}

.btn--compact {
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  padding: 1rem 0;
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  font-size: 0.85rem;
}

.breadcrumb li {
  display: flex;
  align-items: center;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--text-sub);
}

.breadcrumb a {
  color: var(--text-sub);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--accent);
}

.breadcrumb [aria-current="page"] {
  color: var(--text-main);
}

/* ===== Header ===== */
.site-header {
  background: linear-gradient(150deg, #0d2b2b 0%, #0a1a1a 90%);
  position: relative;
  z-index: 1100;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 9999;
  background: var(--card-yellow);
  color: #0a1a1a;
  padding: 0.5rem 1rem;
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform 0.2s;
}

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

.header-top {
  border-bottom: 1px solid var(--border);
}

.header-top-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: #fff;
}

.brand-symbol {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--card-orange);
  clip-path: polygon(0 0, 100% 0, 100% 75%, 75% 100%, 0 100%);
  flex-shrink: 0;
}

.brand-symbol-text {
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 1.1rem;
  line-height: 1;
  color: #0a1a1a;
}

.brand-symbol-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  margin-top: 3px;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-family: var(--font-head);
  font-size: 1.45rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: #fff;
}

.brand-sub {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--text-sub);
  margin-top: 2px;
}

.header-utils {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.util-link {
  color: var(--text-sub);
  font-size: 0.8rem;
  text-decoration: none;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  transition: color 0.2s, border-color 0.2s;
}

.util-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* Nav toggle */
.nav-toggle {
  display: none;
  position: relative;
  width: 46px;
  height: 46px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--card-orange);
  border: 0;
  padding: 0;
  cursor: pointer;
  clip-path: polygon(8px 0, 100% 0, 100% 100%, 0 100%);
}

.nav-toggle[aria-expanded="true"] {
  background: var(--card-yellow);
}

.nav-toggle-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 24px;
  height: 20px;
  justify-content: center;
}

.nav-toggle-line {
  display: block;
  width: 24px;
  height: 3px;
  background: #0a1a1a;
  margin-bottom: 5px;
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle-line:last-child {
  margin-bottom: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Main nav */
.site-nav {
  background: var(--accent);
  position: relative;
}

.site-nav-inner {
  display: flex;
  align-items: center;
}

.nav-link {
  flex: 1;
  display: block;
  text-align: center;
  padding: 0.85rem 0.5rem;
  color: #0a1a1a;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  position: relative;
  transition: background 0.2s, color 0.2s;
}

.nav-link + .nav-link::before {
  content: "";
  width: 1px;
  height: 16px;
  background: rgba(10, 26, 26, 0.25);
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
}

.nav-link:hover {
  background: var(--bg-deep-green);
  color: var(--accent);
}

.nav-link[aria-current="page"] {
  background: var(--card-orange);
  color: #0a1a1a;
}

.site-nav :focus-visible {
  outline-color: var(--card-orange);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-deep-blue);
  margin-top: 4rem;
  position: relative;
}

.site-footer::before {
  content: "";
  display: block;
  height: 6px;
  background: linear-gradient(
    90deg,
    var(--card-orange) 0%,
    var(--card-orange) 30%,
    var(--card-yellow) 30%,
    var(--card-yellow) 55%,
    var(--card-teal) 55%,
    var(--card-teal) 80%,
    var(--accent) 80%,
    var(--accent) 100%
  );
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  padding: 3rem 0 2.2rem;
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.brand-footer .brand-name {
  color: #fff;
}

.brand-footer .brand-sub {
  color: var(--text-sub);
}

.footer-desc {
  color: var(--text-sub);
  max-width: 260px;
  font-size: 0.9rem;
  margin: 0;
}

.footer-col h2 {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-sub);
  margin: 0 0 0.8rem;
}

.footer-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-list li + li {
  margin-top: 0.45rem;
}

.footer-list a {
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.92rem;
  transition: color 0.2s;
}

.footer-list a:hover {
  color: var(--accent);
}

.site-footer :focus-visible {
  outline-color: var(--card-yellow);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.25rem 0 1.5rem;
}

.footer-contact {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.2rem;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-sub);
}

.footer-contact-item {
  display: inline-flex;
  align-items: center;
}

.footer-contact-item::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--accent);
  margin-right: 0.5rem;
  transform: rotate(45deg);
  flex-shrink: 0;
}

.footer-icp,
.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-sub);
}

/* ===== Card Grid ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  background: var(--bg-deep-green);
  border: 1px solid var(--border);
  padding: 1.15rem;
  transition: transform 0.18s, border-color 0.18s, background 0.18s;
  overflow: hidden;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  background: var(--bg-deep-blue);
}

.card--cut::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  border-width: 0 0 14px 14px;
  border-style: solid;
  border-color: transparent transparent var(--card-orange) transparent;
}

.card--spine {
  border-top: 6px solid var(--card-orange);
}

.card--spine-teal {
  border-top-color: var(--card-teal);
}

.card--spine-yellow {
  border-top-color: var(--card-yellow);
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-sub);
}

.card-title {
  font-size: 1.05rem;
  margin: 0;
  line-height: 1.3;
}

.card-title a {
  color: var(--text-main);
  text-decoration: none;
}

.card-title a:hover {
  color: var(--accent);
}

.card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--text-sub);
  font-family: var(--font-mono);
}

/* ===== Shelf / Periodical Card ===== */
.shelf {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  padding: 0.25rem 0 1rem;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) var(--border);
}

.vol {
  flex: 0 0 240px;
  background: var(--bg-deep-green);
  border: 1px solid var(--border);
  border-top: 8px solid var(--card-orange);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: transform 0.2s;
}

.vol:hover {
  transform: translateY(-3px);
}

.vol--teal {
  border-top-color: var(--card-teal);
}

.vol--yellow {
  border-top-color: var(--card-yellow);
}

/* ===== Tile Matrix ===== */
.tile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 0.75rem;
}

.tile {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.4rem;
  padding: 1rem;
  background: var(--bg-deep-green);
  border: 1px solid var(--border);
  color: var(--text-main);
  text-decoration: none;
  transition: transform 0.2s, background 0.2s, border-color 0.2s;
}

.tile:hover {
  transform: rotate(-1deg) translateY(-2px);
  border-color: var(--accent);
}

.tile--orange {
  background: var(--card-orange);
  color: #0a1a1a;
}

.tile--teal {
  background: var(--card-teal);
  color: #0a1a1a;
}

.tile--yellow {
  background: var(--card-yellow);
  color: #0a1a1a;
}

.tile--orange:hover {
  background: #ff8355;
}

.tile--teal:hover {
  background: #33d4bc;
}

.tile--yellow:hover {
  background: #ffdc85;
}

/* ===== List Rows ===== */
.list-rows {
  display: flex;
  flex-direction: column;
}

.list-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  padding: 0.8rem 0.5rem;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}

.list-row:hover {
  background: rgba(57, 255, 20, 0.04);
}

.list-row-main {
  min-width: 0;
}

.list-row-title {
  font-size: 1rem;
  margin: 0 0 0.25rem;
  line-height: 1.3;
}

.list-row-title a {
  color: var(--text-main);
  text-decoration: none;
}

.list-row-title a:hover {
  color: var(--accent);
}

.list-row-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-sub);
  white-space: nowrap;
}

/* ===== Tag Group ===== */
.tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border-radius: 2px;
}

.tag--red {
  background: var(--tag-red);
  color: #fff;
}

.tag--blue {
  background: var(--tag-blue);
  color: #fff;
}

.tag--yellow {
  background: var(--tag-yellow);
  color: #0a1a1a;
}

.tag--orange {
  background: var(--card-orange);
  color: #0a1a1a;
}

.tag--green {
  background: var(--replay-green);
  color: #0a1a1a;
}

/* ===== Badges / Status ===== */
.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 3px 9px;
  vertical-align: middle;
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 0);
}

.badge--live {
  background: var(--live-red);
  color: #fff;
  animation: badge-pulse 2s infinite;
}

.badge--replay {
  background: var(--replay-green);
  color: #0a1a1a;
}

.badge--updating {
  background: var(--updating-blue);
  color: #fff;
}

.badge--new {
  background: var(--card-yellow);
  color: #0a1a1a;
}

.badge--hd {
  background: var(--card-teal);
  color: #0a1a1a;
}

.badge--exclusive {
  background: var(--card-orange);
  color: #0a1a1a;
}

@keyframes badge-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(255, 59, 48, 0.5);
  }

  50% {
    box-shadow: 0 0 0 6px rgba(255, 59, 48, 0);
  }
}

/* ===== Sequence Number ===== */
.seq-num {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-sub);
  min-width: 2em;
  line-height: 1;
}

.seq-num--hot {
  color: var(--card-yellow);
}

/* ===== Metric Bar ===== */
.metric-bar,
.progress-track {
  height: 7px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.metric-bar > span,
.progress-track > span {
  display: block;
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
}

.metric-bar--warm > span {
  background: var(--card-orange);
}

.metric-bar--cool > span {
  background: var(--card-teal);
}

/* ===== Index Strip ===== */
.index-strip {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0.5rem 0.25rem 0.75rem;
  scrollbar-width: thin;
}

.index-strip a {
  display: inline-block;
  white-space: nowrap;
  background: var(--bg-deep-green);
  color: var(--text-main);
  padding: 0.4rem 1rem;
  text-decoration: none;
  font-size: 0.85rem;
  border: 1px solid var(--border);
  transition: background 0.2s, border-color 0.2s;
}

.index-strip a:hover {
  border-color: var(--accent);
}

.index-strip a[aria-current="true"] {
  background: var(--card-orange);
  color: #0a1a1a;
  border-color: var(--card-orange);
}

/* ===== Rail ===== */
.rail {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  padding: 0.25rem 0.25rem 1rem;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) var(--border);
}

.rail-item {
  flex: 0 0 270px;
}

/* ===== Tables ===== */
.schedule-table,
.compare-table {
  background: var(--bg-deep-green);
  border: 1px solid var(--border);
}

.schedule-table th,
.compare-table th {
  background: var(--bg-deep-blue);
  color: var(--text-sub);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 700;
}

.schedule-table td,
.compare-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
  font-size: 0.92rem;
}

.schedule-table tr:last-child td,
.compare-table tr:last-child td {
  border-bottom: 0;
}

.schedule-table tr:hover td,
.compare-table tr:hover td {
  background: rgba(255, 255, 255, 0.04);
}

.schedule-table td:first-child,
.compare-table td:first-child {
  font-family: var(--font-mono);
  color: var(--card-yellow);
  white-space: nowrap;
}

/* ===== Timeline / Update ===== */
.update-timeline {
  position: relative;
  padding-left: 2rem;
}

.update-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.update-item {
  position: relative;
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.update-item::before {
  content: "";
  position: absolute;
  left: -2rem;
  top: 0.4rem;
  width: 10px;
  height: 10px;
  background: var(--accent);
  transform: rotate(45deg);
}

.update-item time {
  font-family: var(--font-mono);
  color: var(--card-yellow);
  font-size: 0.85rem;
}

/* ===== Panels ===== */
.panel {
  background: var(--bg-deep-green);
  border: 1px solid var(--border);
  padding: 1.5rem;
}

.panel--cut {
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}

.panel--orange {
  background: var(--card-orange);
  color: #0a1a1a;
}

.panel--teal {
  background: var(--card-teal);
  color: #0a1a1a;
}

.panel--yellow {
  background: var(--card-yellow);
  color: #0a1a1a;
}

/* ===== TOC Nav ===== */
.toc-nav {
  position: sticky;
  top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  background: var(--bg-deep-green);
  border: 1px solid var(--border);
  padding: 1rem;
}

.toc-nav a {
  color: var(--text-sub);
  text-decoration: none;
  padding: 0.35rem 0.5rem;
  border-left: 3px solid transparent;
}

.toc-nav a:hover {
  color: var(--accent);
}

.toc-nav a[aria-current="true"] {
  color: var(--accent);
  border-left-color: var(--accent);
}

/* ===== Image Frame ===== */
.img-frame {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(57, 255, 20, 0.12), transparent 55%),
    var(--bg-deep-blue);
  aspect-ratio: 16 / 10;
  min-height: 120px;
}

.img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: relative;
  z-index: 1;
}

/* ===== Scroll Progress & Back Top ===== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--card-yellow);
  transform: scaleX(0);
  transform-origin: left;
  z-index: 10000;
  pointer-events: none;
}

.back-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.5rem;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 0;
  background: var(--card-orange);
  color: #0a1a1a;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  z-index: 950;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: background 0.2s, transform 0.2s;
}

.back-top:hover {
  background: var(--card-yellow);
  transform: translateY(-3px);
}

.back-top[hidden] {
  display: none;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .footer-brand-col {
    grid-column: 1 / -1;
  }

  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  }
}

@media (max-width: 860px) {
  .header-top-inner {
    padding: 0.7rem 0;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .util-link {
    display: none;
  }

  .site-nav {
    display: none;
  }

  .site-nav[data-open="true"] {
    display: block;
  }

  .site-nav-inner {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-link {
    flex: none;
    text-align: left;
    padding: 0.9rem 1rem;
    border-bottom: 1px solid rgba(10, 26, 26, 0.15);
  }

  .nav-link:last-child {
    border-bottom: 0;
  }

  .nav-link + .nav-link::before {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-legal {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 600px) {
  .brand-name {
    font-size: 1.15rem;
  }

  .brand-sub {
    font-size: 0.66rem;
  }

  .brand-symbol {
    width: 42px;
    height: 42px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    padding-top: 2rem;
  }

  .list-row {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 0.5rem 0.75rem;
  }

  .list-row-meta {
    grid-column: 2;
  }

  .btn--header {
    display: none;
  }

  .rail-item {
    flex-basis: 230px;
  }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .badge--live {
    animation: none;
  }
}