/* MELBET 中文服务 · 共享站点样式 /assets/site.css */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16.5px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  color: var(--ink);
  background-color: var(--paper);
  background-image: radial-gradient(rgba(10, 35, 56, 0.055) 0.8px, transparent 0.9px);
  background-size: 5px 5px;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
dl,
figure,
blockquote {
  margin: 0;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: 0.01em;
}

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

a {
  color: inherit;
}

button {
  font: inherit;
  color: inherit;
}

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

:root {
  --ink: #0A2338;
  --ink-soft: #16374F;
  --paper: #F6F1E7;
  --paper-deep: #E8DFCE;
  --orange: #E2591C;
  --orange-deep: #A6360D;
  --orange-tint: #FBE3D6;
  --mint: #0F7F5F;
  --mint-tint: #D6F0E4;
  --slate: #5A6E82;
  --white: #FFFFFF;
  --line: 2px solid var(--ink);
  --hair: 1px solid rgba(10, 35, 56, 0.28);
  --shadow: 6px 6px 0 var(--ink);
  --shadow-sm: 4px 4px 0 var(--ink);
  --font-display: "Songti SC", "Source Han Serif SC", "Noto Serif CJK SC", "SimSun", Georgia, serif;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, "DejaVu Sans Mono", monospace;
  --max: 1280px;
  --pad: 24px;
}

/* ---------- 通用排版工具 ---------- */

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.lead {
  font-size: 19px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.muted {
  color: var(--slate);
}

.shell {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

.section {
  padding-top: 56px;
  padding-bottom: 56px;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  margin-bottom: 24px;
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--orange-deep);
}

.chapter-num {
  font-family: var(--font-mono);
  font-size: 64px;
  font-weight: 800;
  line-height: 0.85;
  letter-spacing: -0.03em;
  color: var(--orange-deep);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

.aside-col {
  grid-column: 1 / span 2;
}

.main-col {
  grid-column: 3 / span 10;
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: var(--line);
  border-radius: 2px;
  background: var(--white);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  box-shadow: 4px 4px 0 var(--ink);
  cursor: pointer;
  transition: transform 0.12s ease-out, box-shadow 0.12s ease-out, background-color 0.12s ease-out, color 0.12s ease-out;
}

.btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 6px 6px 0 var(--ink);
}

.btn:active {
  transform: translate(3px, 3px);
  box-shadow: 1px 1px 0 var(--ink);
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
  box-shadow: 4px 4px 0 var(--orange);
}

.btn-primary:hover {
  box-shadow: 6px 6px 0 var(--orange);
}

.btn-primary:active {
  box-shadow: 1px 1px 0 var(--orange);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  box-shadow: none;
  border-color: var(--ink);
}

.btn-ghost:hover {
  background: var(--orange-tint);
  box-shadow: 3px 3px 0 var(--ink);
  transform: translate(-1px, -1px);
}

.btn-ghost:active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

.btn-sm {
  padding: 8px 13px;
  font-size: 13px;
  box-shadow: 3px 3px 0 var(--ink);
}

.btn-sm.btn-primary {
  box-shadow: 3px 3px 0 var(--orange);
}

.btn-sm:hover {
  box-shadow: 4px 4px 0 var(--ink);
}

.btn-sm.btn-primary:hover {
  box-shadow: 4px 4px 0 var(--orange);
}

/* ---------- 画框式页头 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--paper);
  border: var(--line);
  border-radius: 0;
}

.skip-link {
  position: absolute;
  left: 14px;
  top: -120px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--paper);
  border: 2px solid var(--orange);
  border-radius: 2px;
  font-size: 13.5px;
  font-weight: 700;
  text-decoration: none;
  transition: top 0.15s ease-out;
}

.skip-link:focus {
  top: 8px;
}

.header-utility {
  background: var(--paper-deep);
  border-bottom: 1px solid rgba(10, 35, 56, 0.35);
}

.utility-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 4px 20px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 5px var(--pad);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

.utility-clock {
  display: inline-flex;
  align-items: center;
}

.utility-clock::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 8px;
  background: var(--mint);
}

.utility-icp {
  color: var(--slate);
}

.header-main {
  background: var(--paper);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 13px var(--pad);
}

.brand {
  order: 1;
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--ink);
  color: var(--paper);
  border: var(--line);
  border-radius: 0;
  box-shadow: 3px 3px 0 var(--orange);
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  line-height: 1;
}

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

.brand-name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand-line {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.site-nav {
  order: 2;
  flex: 1 1 auto;
  min-width: 0;
}

.nav-list {
  display: flex;
  align-items: stretch;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-link {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 7px 11px 8px;
  border: 2px solid transparent;
  border-radius: 2px;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.15;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.12s ease-out, color 0.12s ease-out, border-color 0.12s ease-out;
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--orange-deep);
}

.nav-link:hover {
  background: var(--orange-tint);
  border-color: var(--ink);
  color: var(--ink);
}

.nav-link[aria-current="page"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.nav-link[aria-current="page"] .nav-index {
  color: var(--mint-tint);
}

.header-tools {
  order: 3;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.nav-toggle {
  order: 2;
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 8px 12px;
  background: var(--white);
  color: var(--ink);
  border: var(--line);
  border-radius: 2px;
  box-shadow: 3px 3px 0 var(--ink);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.12s ease-out;
}

.nav-toggle:hover {
  background: var(--orange-tint);
}

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}

.nav-toggle-bars i {
  display: block;
  height: 2px;
  background: var(--ink);
  transition: transform 0.15s ease-out, opacity 0.15s ease-out;
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.nav-toggle-label {
  letter-spacing: 0.08em;
}

.scroll-meter {
  height: 4px;
  background: var(--paper-deep);
  border-top: 1px solid rgba(10, 35, 56, 0.35);
}

.scroll-meter-fill {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.1s linear;
}

/* ---------- 封底式页脚 ---------- */

.site-footer {
  margin-top: 72px;
  background: var(--paper-deep);
  border: var(--line);
  color: var(--ink);
}

.footer-top {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 40px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 44px var(--pad) 36px;
}

.footer-brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  background: var(--ink);
  color: var(--paper);
  border: var(--line);
  box-shadow: 3px 3px 0 var(--orange);
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 800;
  line-height: 1;
}

.footer-brand-name {
  margin: 14px 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
}

.footer-note {
  max-width: 24em;
  margin-bottom: 18px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.footer-col {
  padding: 0 20px;
  border-left: var(--hair);
}

.footer-col:first-child {
  padding-left: 0;
  border-left: none;
}

.footer-col-title {
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--slate);
}

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

.footer-links a {
  display: inline-block;
  padding: 5px 0;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.12s ease-out, border-color 0.12s ease-out;
}

.footer-links a:hover {
  color: var(--orange-deep);
  border-bottom-color: var(--orange-deep);
}

.footer-contact {
  border-top: var(--hair);
  background: var(--paper);
}

.footer-contact-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 26px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 15px var(--pad);
  list-style: none;
  font-size: 13px;
}

.footer-contact-item {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}

.footer-contact-key {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--slate);
}

.footer-contact-val {
  color: var(--ink);
  font-weight: 500;
}

.footer-legal {
  border-top: var(--hair);
}

.footer-legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 13px var(--pad) 18px;
  font-size: 12px;
  color: var(--slate);
}

.footer-fine {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-legal-links a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(10, 35, 56, 0.35);
}

.footer-legal-links a:hover {
  color: var(--orange-deep);
  border-bottom-color: var(--orange-deep);
}

/* ---------- 面包屑 ---------- */

.breadcrumbs {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px var(--pad) 0;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 6px;
  color: rgba(10, 35, 56, 0.4);
}

.breadcrumbs a {
  color: var(--ink-soft);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--orange-deep);
}

.breadcrumbs [aria-current="page"] {
  color: var(--orange-deep);
}

/* ---------- 卡片与标记 ---------- */

.card {
  padding: 22px;
  background: var(--white);
  border: var(--line);
  border-radius: 2px;
  box-shadow: var(--shadow-sm);
}

.card-tag {
  display: inline-block;
  padding: 3px 8px;
  border: 1px solid rgba(166, 54, 13, 0.35);
  border-radius: 2px;
  background: var(--orange-tint);
  color: var(--orange-deep);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
}

.num-badge {
  display: inline-grid;
  place-items: center;
  min-width: 34px;
  height: 34px;
  padding: 0 6px;
  background: var(--orange);
  color: var(--ink);
  border: var(--line);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 800;
  line-height: 1;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 3px 9px;
  border: 1px solid rgba(15, 127, 95, 0.4);
  border-radius: 2px;
  background: var(--mint-tint);
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.status-chip::before {
  content: "";
  width: 6px;
  height: 6px;
  background: currentColor;
}

.status-chip--warn {
  background: var(--orange-tint);
  border-color: rgba(166, 54, 13, 0.4);
  color: var(--orange-deep);
}

.status-chip--idle {
  background: var(--paper-deep);
  border-color: rgba(10, 35, 56, 0.25);
  color: var(--ink-soft);
}

/* ---------- 对比表 ---------- */

.data-table {
  width: 100%;
  border-collapse: collapse;
  border: var(--line);
  background: var(--white);
  font-size: 14.5px;
}

.data-table caption {
  padding-bottom: 8px;
  text-align: left;
  font-size: 12.5px;
  color: var(--slate);
}

.data-table th,
.data-table td {
  padding: 10px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid rgba(10, 35, 56, 0.18);
}

.data-table thead th {
  background: var(--ink);
  color: var(--paper);
  border-bottom: var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.data-table tbody tr:nth-child(even) {
  background: var(--paper-deep);
}

.data-table tbody tr:hover {
  background: var(--orange-tint);
}

.data-table .is-key {
  background: var(--orange-tint);
  font-weight: 700;
}

/* ---------- 横向步骤条 ---------- */

.steps {
  display: flex;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  list-style: none;
}

.step {
  position: relative;
  flex: 1 1 150px;
  padding: 14px 16px 14px 18px;
  background: var(--white);
  border: var(--line);
  border-right-width: 0;
}

.step:last-child {
  border-right-width: 2px;
}

.step.is-done {
  background: var(--mint-tint);
}

.step-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--orange-deep);
}

.step-title {
  display: block;
  margin-top: 2px;
  font-size: 14.5px;
  font-weight: 700;
}

.step-desc {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- 筛选条 ---------- */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
}

.filter-label {
  margin-right: 4px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--slate);
}

.filter-btn {
  padding: 7px 14px;
  background: var(--white);
  color: var(--ink);
  border: var(--line);
  border-radius: 2px;
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color 0.12s ease-out, box-shadow 0.12s ease-out, color 0.12s ease-out;
}

.filter-btn:hover {
  background: var(--orange-tint);
}

.filter-btn[aria-pressed="true"] {
  background: var(--orange);
  color: var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
}

.filter-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--slate);
}

.filter-empty {
  display: none;
  padding: 20px;
  border: 2px dashed rgba(10, 35, 56, 0.35);
  color: var(--slate);
  font-size: 14px;
}

.filter-empty[data-visible] {
  display: block;
}

[data-filter-item][hidden] {
  display: none !important;
}

[data-filter-item] {
  animation: filterIn 0.12s ease-out both;
}

@keyframes filterIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ---------- 章节显现 ---------- */

[data-reveal] {
  opacity: 0;
  transform: translateY(10px);
}

[data-reveal="num"] {
  transform: translateX(-12px);
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
  transition: opacity 0.2s ease-out, transform 0.2s ease-out;
}

/* ---------- 目录高亮 ---------- */

.toc-link {
  display: block;
  padding: 6px 0;
  color: var(--slate);
  font-size: 13.5px;
  text-decoration: none;
  border-left: 3px solid transparent;
  padding-left: 10px;
}

.toc-link:hover {
  color: var(--orange-deep);
}

.toc-link[aria-current="true"] {
  color: var(--ink);
  font-weight: 700;
  border-left-color: var(--orange);
}

/* ---------- 图片容器基础规则 ---------- */

.media-frame {
  position: relative;
  overflow: hidden;
  border: var(--line);
  border-radius: 2px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.media-frame > img,
.media-frame > picture > img,
.media-frame > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ratio-4-3 {
  aspect-ratio: 4 / 3;
}

.ratio-16-9 {
  aspect-ratio: 16 / 9;
}

.ratio-1-1 {
  aspect-ratio: 1 / 1;
}

.media-placeholder {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  min-height: 180px;
  background-color: var(--paper-deep);
  background-image: repeating-linear-gradient(45deg, rgba(10, 35, 56, 0.08) 0 1px, transparent 1px 10px);
  color: var(--slate);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
}

.media-caption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 响应式 ---------- */

@media (max-width: 1160px) {
  .nav-toggle {
    display: inline-flex;
  }

  .header-tools {
    order: 3;
    margin-left: 10px;
  }

  .site-nav {
    order: 4;
    flex: 1 1 100%;
    display: none;
    margin-top: 4px;
  }

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

  .site-nav[data-open] .nav-list {
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 8px;
    padding: 12px 0 8px;
    border-top: var(--line);
    scrollbar-width: thin;
  }

  .site-nav[data-open] .nav-link {
    background: var(--white);
    border-color: var(--ink);
    box-shadow: 3px 3px 0 var(--ink);
    padding: 8px 12px;
  }

  .site-nav[data-open] .nav-link[aria-current="page"] {
    background: var(--ink);
  }
}

@media (max-width: 1024px) {
  .footer-top {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .footer-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 28px;
  }

  .footer-col {
    padding: 0 18px;
  }

  .footer-col:nth-child(odd) {
    padding-left: 0;
    border-left: none;
  }

  .aside-col {
    grid-column: 1 / span 12;
  }

  .main-col {
    grid-column: 1 / span 12;
  }
}

@media (max-width: 768px) {
  .site-header {
    border-left: none;
    border-right: none;
  }

  .site-footer {
    border-left: none;
    border-right: none;
  }

  .grid-12 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

  .section {
    padding-top: 40px;
    padding-bottom: 40px;
  }

  .chapter-num {
    font-size: 48px;
  }

  .step {
    flex: 1 1 100%;
    border-right-width: 2px;
    border-bottom-width: 0;
  }

  .step:last-child {
    border-bottom-width: 2px;
  }

  .data-table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}

@media (max-width: 640px) {
  .btn-ghost.btn-sm {
    display: none;
  }

  .header-inner {
    padding: 12px var(--pad);
  }

  .footer-cols {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 0;
  }

  .footer-col {
    padding: 14px 0;
    border-left: none;
    border-top: var(--hair);
  }

  .footer-col:first-child {
    border-top: none;
    padding-top: 0;
  }

  .footer-legal-inner {
    justify-content: flex-start;
  }
}

@media (max-width: 480px) {
  :root {
    --pad: 16px;
  }

  body {
    font-size: 16px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    font-size: 20px;
  }

  .brand-name {
    font-size: 16.5px;
  }

  .brand-line {
    font-size: 9.5px;
    letter-spacing: 0.1em;
  }

  .utility-inner {
    font-size: 10.5px;
    letter-spacing: 0.06em;
  }

  .chapter-num {
    font-size: 40px;
  }

  .filter-count {
    margin-left: 0;
    width: 100%;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  [data-reveal],
  [data-reveal="num"] {
    opacity: 1;
    transform: none;
  }

  .scroll-meter-fill {
    transition: none;
  }
}