[hidden] { display: none !important; }
:root {
  color-scheme: light;
  --paper: #f5f3ec;
  --surface: #fcfbf6;
  --surface-2: #ebece3;
  --ink: #182d35;
  --muted: #64757a;
  --line: #d4dcd8;
  --deep: #123942;
  --deep-2: #1c4a51;
  --teal: #2d7877;
  --aqua: #d9ece7;
  --acid: #d7ec80;
  --orange: #e7a66c;
  --radius: 13px;
  --shadow: 0 12px 38px rgba(22, 51, 56, .06);
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: "Avenir Next", Avenir, "Segoe UI", system-ui, sans-serif; -webkit-font-smoothing: antialiased; line-height: 1.55; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
a { color: inherit; }
img, svg { max-width: 100%; }
::selection { background: var(--acid); color: var(--deep); }
:focus-visible { outline: 3px solid var(--teal); outline-offset: 3px; }
.skip-link { position: absolute; z-index: 50; top: -80px; left: 16px; padding: 10px 16px; background: var(--acid); color: var(--deep); font-weight: 700; }
.skip-link:focus { top: 10px; }
.wrap { width: min(100% - 48px, 1180px); margin-inline: auto; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.site-header { position: relative; z-index: 10; border-bottom: 1px solid var(--line); background: rgba(252, 251, 246, .97); }
.header-inner { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: inline-flex; align-items: center; flex: none; gap: 11px; text-decoration: none; color: var(--deep); }
.brand-mark { width: 36px; height: 36px; display: grid; place-items: center; border: 2px solid var(--deep); border-radius: 10px; transform: rotate(-7deg); position: relative; }
.brand-mark::before, .brand-mark::after { content: ""; position: absolute; width: 6px; height: 6px; border-radius: 50%; background: var(--deep); }
.brand-mark::before { top: 6px; left: 7px; }
.brand-mark::after { bottom: 6px; right: 7px; }
.brand-mark span { width: 13px; height: 2px; background: var(--deep); transform: rotate(-45deg); }
.brand-name { font-size: 16px; line-height: 1.05; font-weight: 800; letter-spacing: -.055em; }
.brand-name small { display: block; margin-top: 4px; color: var(--teal); font-size: 9px; font-weight: 800; letter-spacing: .19em; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: clamp(14px, 2.5vw, 34px); }
.nav-links a, .footer-links a { text-decoration: none; }
.nav-links a { font-size: 13px; font-weight: 700; color: #486168; transition: color .18s ease; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--teal); }
.nav-links .nav-feature { padding: 10px 16px; border-radius: 8px; background: var(--deep); color: #f6f7ef; }
.nav-links .nav-feature:hover { color: var(--acid); }
.breadcrumbs { display: flex; gap: 9px; flex-wrap: wrap; align-items: center; padding-block: 18px; color: var(--muted); font-size: 12px; }
.breadcrumbs a { text-decoration: none; }
.breadcrumbs a:hover { text-decoration: underline; color: var(--deep); }
.breadcrumbs .sep { color: #a6b4af; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--teal); font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .17em; }
.eyebrow::before { content: ""; width: 18px; height: 1px; background: currentColor; }
h1, h2, h3, h4, p { margin-top: 0; }
h1, h2, h3 { letter-spacing: -.045em; line-height: 1.12; }
h1 { font-size: clamp(43px, 6.6vw, 86px); font-weight: 700; }
h2 { font-size: clamp(29px, 3.5vw, 47px); font-weight: 700; }
h3 { font-size: 20px; }
.serif { font-family: Georgia, "Times New Roman", serif; font-style: italic; font-weight: 400; letter-spacing: -.055em; }
.muted { color: var(--muted); }
.section { padding-block: clamp(68px, 8vw, 114px); }
.section-tight { padding-block: clamp(50px, 6vw, 82px); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
.section-head h2 { margin: 12px 0 0; max-width: 680px; }
.section-head p { max-width: 380px; margin: 0; color: var(--muted); }
.text-link { display: inline-flex; gap: 12px; align-items: center; color: var(--deep); font-weight: 800; text-decoration: none; white-space: nowrap; border-bottom: 1px solid currentColor; padding-bottom: 3px; }
.text-link:hover { color: var(--teal); }
.arrow { font-size: 18px; line-height: 1; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 48px; padding: 12px 19px; border: 1px solid var(--deep); border-radius: 8px; background: var(--deep); color: #f8faef; font-size: 13px; font-weight: 800; line-height: 1.2; text-decoration: none; transition: transform .2s ease, background .2s ease, color .2s ease; }
.button:hover { transform: translateY(-2px); background: var(--deep-2); }
.button-secondary { background: transparent; color: var(--deep); }
.button-secondary:hover { background: var(--aqua); }
.button-light { background: var(--acid); border-color: var(--acid); color: var(--deep); }
.button-light:hover { background: #e5f3ac; }

/* The home page begins like a laboratory notebook opening onto an instrument panel. */
.hero { background: var(--deep); color: #f4f6ed; overflow: hidden; position: relative; }
.hero::before { content: ""; position: absolute; inset: 0; opacity: .13; background-image: linear-gradient(to right, #a9d0c8 1px, transparent 1px), linear-gradient(to bottom, #a9d0c8 1px, transparent 1px); background-size: 62px 62px; mask-image: linear-gradient(90deg, transparent 15%, black 100%); pointer-events: none; }
.hero-inner { position: relative; min-height: 600px; display: grid; grid-template-columns: minmax(0, 1.13fr) minmax(340px, .87fr); align-items: center; gap: 40px; padding-block: 80px 94px; }
.hero-copy { position: relative; z-index: 1; }
.hero .eyebrow { color: var(--acid); }
.hero h1 { max-width: 730px; margin: 24px 0 22px; }
.hero h1 .serif { color: var(--acid); }
.hero-copy > p { max-width: 530px; color: #c3d4d0; font-size: clamp(16px, 1.7vw, 19px); line-height: 1.65; }
.hero-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-top: 32px; }
.hero-actions .button-secondary { color: #f5f6ec; border-color: #70918d; }
.hero-actions .button-secondary:hover { background: rgba(255,255,255,.08); }
.hero-note { display: flex; align-items: center; gap: 9px; margin-top: 45px; color: #9dbdb7; font-size: 11px; font-weight: 700; letter-spacing: .055em; text-transform: uppercase; }
.hero-note .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--acid); }
.hero-visual { position: relative; min-height: 410px; display: flex; justify-content: center; align-items: center; }
.orbit { position: absolute; width: min(100%, 410px); aspect-ratio: 1; border: 1px solid rgba(183, 221, 205, .25); border-radius: 50%; }
.orbit::before, .orbit::after { content: ""; position: absolute; inset: 15%; border: 1px solid rgba(183, 221, 205, .23); border-radius: 50%; }
.orbit::after { inset: 34%; }
.orbit-axis { position: absolute; width: 110%; height: 1px; background: rgba(183, 221, 205, .22); transform: rotate(-33deg); }
.atom-card { position: relative; z-index: 1; width: 220px; min-height: 250px; padding: 22px; border: 1px solid #a3c9b8; border-radius: 13px; background: #dfeddb; box-shadow: 18px 22px 0 rgba(5, 27, 32, .2); color: var(--deep); transform: rotate(5deg); }
.atom-card-top { display: flex; justify-content: space-between; align-items: start; font-family: "SFMono-Regular", Consolas, monospace; font-size: 12px; font-weight: 700; }
.atom-symbol { display: block; margin: 35px 0 18px; font-size: 92px; font-weight: 650; line-height: 1; letter-spacing: -.1em; }
.atom-card-bottom { display: flex; justify-content: space-between; align-items: end; border-top: 1px solid #adc7b8; padding-top: 12px; font-size: 12px; }
.atom-card-bottom strong { display: block; font-size: 17px; }
.floating-label { position: absolute; z-index: 2; padding: 9px 12px; border: 1px solid #6caaa0; background: var(--deep-2); color: #d4e7df; font: 11px "SFMono-Regular", Consolas, monospace; letter-spacing: -.025em; }
.floating-label.one { top: 28px; right: 0; transform: rotate(5deg); }
.floating-label.two { bottom: 35px; left: 3%; transform: rotate(-6deg); }
.search-band { background: var(--aqua); border-bottom: 1px solid #cadcd5; }
.search-inner { display: grid; grid-template-columns: 1fr minmax(300px, 480px); gap: 28px; align-items: center; padding-block: 27px; }
.search-inner strong { display: block; font-size: 16px; letter-spacing: -.02em; }
.search-inner span { color: #5b7773; font-size: 13px; }
.search-box { position: relative; }
.search-box::before { content: ""; position: absolute; left: 17px; top: 50%; width: 13px; height: 13px; border: 2px solid var(--teal); border-radius: 50%; transform: translateY(-65%); pointer-events: none; }
.search-box::after { content: ""; position: absolute; width: 7px; height: 2px; left: 29px; top: calc(50% + 5px); background: var(--teal); transform: rotate(45deg); pointer-events: none; }
.search-box input { width: 100%; min-height: 51px; border: 1px solid #bfd2cd; border-radius: 8px; background: var(--surface); padding: 13px 17px 13px 47px; color: var(--ink); outline-offset: 2px; }
.search-box input::placeholder { color: #80918c; }
.search-results { position: absolute; z-index: 20; top: calc(100% + 7px); left: 0; right: 0; max-height: 360px; overflow: auto; background: var(--surface); border: 1px solid var(--line); border-radius: 9px; box-shadow: 0 20px 45px rgba(18,57,66,.16); }
.search-results:empty { display: none; }
.search-results a { display: block; padding: 11px 16px; border-bottom: 1px solid var(--line); text-decoration: none; font-size: 14px; }
.search-results a:hover { background: var(--aqua); }
.category-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.category-card { display: flex; min-height: 220px; flex-direction: column; justify-content: space-between; padding: 27px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); text-decoration: none; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.category-card:hover, .item-card:hover { transform: translateY(-3px); border-color: #9dc2b5; box-shadow: var(--shadow); }
.category-card:nth-child(4n+2) { background: #e6ede7; }
.category-card:nth-child(4n+3) { background: #edf0df; }
.category-card:nth-child(4n+4) { background: #e9edf0; }
.category-top { display: flex; justify-content: space-between; align-items: start; }
.category-index { font: 12px "SFMono-Regular", Consolas, monospace; color: var(--teal); }
.category-glyph { width: 36px; height: 36px; border: 1px solid var(--teal); border-radius: 50%; position: relative; }
.category-glyph::before { content: ""; position: absolute; inset: 9px; border: 1px solid var(--teal); border-radius: 50%; }
.category-glyph::after { content: ""; position: absolute; width: 5px; height: 5px; top: 4px; right: 3px; border-radius: 50%; background: var(--teal); }
.category-card h3 { margin: 0 0 6px; font-size: 26px; }
.category-card p { margin: 0; color: var(--muted); font-size: 13px; max-width: 380px; }
.category-bottom { display: flex; align-items: end; justify-content: space-between; gap: 16px; }
.category-bottom .arrow { font-size: 23px; color: var(--teal); }
.panel-section { background: var(--surface-2); }
.tool-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid #c8d3ce; }
.tool-row { display: flex; align-items: center; gap: 17px; padding: 22px 15px 22px 0; border-bottom: 1px solid #c8d3ce; text-decoration: none; transition: padding-left .2s ease, color .2s ease; }
.tool-row:nth-child(odd) { margin-right: 28px; }
.tool-row:hover { padding-left: 7px; color: var(--teal); }
.tool-index { flex: none; width: 36px; color: #829b95; font: 11px "SFMono-Regular", Consolas, monospace; }
.tool-row strong { display: block; font-size: 15px; letter-spacing: -.025em; }
.tool-row small { display: block; margin-top: 2px; color: var(--muted); font-size: 12px; }
.tool-row .arrow { margin-left: auto; }
.feature-split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 8vw, 110px); align-items: center; }
.feature-art { min-height: 400px; padding: clamp(28px, 5vw, 54px); display: flex; flex-direction: column; justify-content: space-between; border-radius: 14px; background: var(--deep); color: #eff5e8; position: relative; overflow: hidden; }
.feature-art::before { content: ""; position: absolute; width: 380px; height: 380px; border: 1px solid #407078; border-radius: 50%; right: -120px; top: -130px; box-shadow: 0 0 0 50px rgba(79, 135, 132, .08), 0 0 0 100px rgba(79, 135, 132, .06); }
.feature-art > * { position: relative; z-index: 1; }
.feature-art .eyebrow { color: var(--acid); }
.feature-art .formula-illustration { font: clamp(42px, 5vw, 70px) Georgia, serif; letter-spacing: -.07em; line-height: 1.1; }
.feature-art .formula-illustration sub { font-size: .36em; }
.feature-art .formula-caption { padding-top: 20px; border-top: 1px solid #5e8282; color: #b4cbc5; font: 11px "SFMono-Regular", Consolas, monospace; letter-spacing: .04em; }
.feature-copy h2 { margin: 15px 0 20px; }
.feature-copy p { max-width: 480px; color: var(--muted); font-size: 16px; }
.feature-copy .text-link { margin-top: 16px; }
.resource-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.resource-card { display: flex; min-height: 185px; flex-direction: column; justify-content: space-between; padding: 25px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); text-decoration: none; transition: transform .2s ease, border-color .2s ease; }
.resource-card:hover { transform: translateY(-3px); border-color: var(--teal); }
.resource-card .number { color: var(--teal); font: 11px "SFMono-Regular", Consolas, monospace; }
.resource-card strong { display: block; margin-bottom: 6px; font-size: 20px; letter-spacing: -.04em; line-height: 1.2; }
.resource-card small { display: block; color: var(--muted); font-size: 13px; }
.resource-card .arrow { align-self: end; color: var(--teal); }
.closing-banner { background: var(--acid); padding-block: 55px; }
.closing-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.closing-inner h2 { max-width: 650px; margin: 0; font-size: clamp(30px, 4vw, 52px); }

/* Interior pages */
.page-hero { padding: 55px 0 67px; border-bottom: 1px solid var(--line); }
.page-hero h1 { max-width: 900px; margin: 17px 0 18px; font-size: clamp(42px, 5vw, 70px); }
.page-hero p { max-width: 720px; color: var(--muted); font-size: 17px; line-height: 1.7; margin: 0; }
.directory-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.item-card { display: flex; flex-direction: column; justify-content: space-between; min-height: 194px; padding: 22px; border: 1px solid var(--line); border-radius: 11px; background: var(--surface); text-decoration: none; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.item-card-top { display: flex; justify-content: space-between; color: var(--teal); font: 11px "SFMono-Regular", Consolas, monospace; }
.item-card h2, .item-card h3 { font-size: 21px; margin: 22px 0 7px; }
.item-card p { margin: 0; color: var(--muted); font-size: 13px; }
.empty-state { padding: 45px; background: var(--surface); border: 1px dashed var(--line); border-radius: 12px; color: var(--muted); }
.tool-layout { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(260px, .85fr); gap: clamp(28px, 5vw, 75px); align-items: start; padding-block: 60px 90px; }
.calc-panel { padding: clamp(23px, 3vw, 36px); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.panel-heading { margin-bottom: 28px; padding-bottom: 17px; border-bottom: 1px solid var(--line); }
.panel-heading h2 { margin: 0 0 6px; font-size: 25px; }
.panel-heading p { margin: 0; color: var(--muted); font-size: 13px; }
.field-grid { display: grid; gap: 17px; }
.field label { display: block; margin-bottom: 7px; font-size: 13px; font-weight: 750; }
.field-control { display: flex; position: relative; }
.field input, .field select { width: 100%; min-height: 48px; padding: 11px 14px; border: 1px solid #bfcdc9; border-radius: 7px; background: #fffefa; color: var(--ink); outline-offset: 2px; appearance: auto; }
.field input:focus, .field select:focus { border-color: var(--teal); }
.field input:has(+ .field-unit) { padding-right: 70px; }
.field-unit { position: absolute; right: 13px; top: 50%; transform: translateY(-50%); color: var(--muted); font: 12px "SFMono-Regular", Consolas, monospace; pointer-events: none; }
.form-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 27px; }
.form-actions .button { min-width: 112px; }
.result-box { margin-top: 28px; padding: 22px; min-height: 112px; background: var(--aqua); border: 1px solid #c5ded6; border-radius: 9px; }
.result-label { display: block; margin-bottom: 9px; color: var(--teal); font-size: 10px; font-weight: 800; text-transform: uppercase; letter-spacing: .14em; }
#result { display: block; color: var(--deep); font-size: clamp(21px, 2.2vw, 29px); font-weight: 700; letter-spacing: -.04em; overflow-wrap: anywhere; }
.tool-notes { display: grid; gap: 25px; }
.info-block { padding-bottom: 24px; border-bottom: 1px solid var(--line); }
.info-block h2, .info-block h3 { font-size: 20px; margin: 0 0 11px; }
.info-block p { color: var(--muted); font-size: 14px; line-height: 1.7; margin: 0; }
.formula-box { margin-top: 12px; padding: 15px 17px; border-left: 3px solid var(--teal); background: var(--aqua); color: var(--deep); font: 15px "SFMono-Regular", Consolas, monospace; overflow-wrap: anywhere; }
.related-list { display: grid; gap: 9px; }
.related-list a { color: var(--teal); text-decoration: none; font-size: 14px; font-weight: 700; }
.related-list a:hover { text-decoration: underline; }
.article-layout { display: grid; grid-template-columns: minmax(0, 730px) minmax(200px, 1fr); gap: clamp(35px, 8vw, 110px); padding-block: 62px 100px; }
.prose { font-size: 16px; line-height: 1.8; }
.prose h2 { margin: 55px 0 18px; font-size: 30px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin: 32px 0 12px; font-size: 21px; }
.prose p { margin-bottom: 20px; color: #465e61; }
.prose ul, .prose ol { padding-left: 23px; color: #465e61; }
.prose li { margin-bottom: 7px; }
.prose a { color: var(--teal); text-underline-offset: 3px; }
.prose .formula-box { margin-block: 23px; }
.contents-card { position: sticky; top: 25px; padding: 22px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.contents-card strong { display: block; margin-bottom: 15px; font-size: 11px; text-transform: uppercase; letter-spacing: .12em; color: var(--teal); }
.contents-card a { display: block; padding: 8px 0; border-top: 1px solid var(--line); text-decoration: none; font-size: 13px; color: var(--muted); }
.contents-card a:hover { color: var(--deep); }
.faq-list { margin-top: 35px; }
.faq-list details { border-top: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary { padding: 16px 25px 16px 0; cursor: pointer; font-weight: 700; }
.faq-list details p { margin: 0 0 18px; color: var(--muted); font-size: 14px; }
.periodic-legend { display: flex; flex-wrap: wrap; gap: 15px 22px; margin-bottom: 25px; font-size: 12px; color: var(--muted); }
.legend-dot { display: inline-block; width: 11px; height: 11px; margin-right: 6px; border-radius: 3px; background: var(--aqua); vertical-align: -1px; }
.periodic-scroll { overflow-x: auto; padding-bottom: 16px; }
.periodic-grid { display: grid; grid-template-columns: repeat(18, minmax(49px, 1fr)); gap: 4px; min-width: 980px; }
.element { display: block; min-height: 65px; padding: 5px 6px; border: 1px solid #b9d3ca; border-radius: 5px; background: #e0eee5; color: var(--deep); line-height: 1.1; text-decoration: none; transition: transform .18s ease, border-color .18s ease; }
.element:hover { transform: translateY(-3px); border-color: var(--teal); position: relative; z-index: 1; }
.element:nth-child(3n+2) { background: #e6e8d2; border-color: #d1d3a9; }
.element:nth-child(4n+3) { background: #e0e9ed; border-color: #c1d0d6; }
.element-number { display: block; font: 10px "SFMono-Regular", Consolas, monospace; }
.element-symbol { display: block; margin: 3px 0; font-size: 19px; font-weight: 800; letter-spacing: -.06em; }
.element-name { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 9px; }
.periodic-note { margin-top: 12px; color: var(--muted); font-size: 13px; }
.site-footer { padding: 65px 0 25px; background: #102f38; color: #edf3e9; }
.footer-grid { display: grid; grid-template-columns: 1.8fr 1fr 1fr; gap: 50px; padding-bottom: 65px; }
.site-footer .brand { color: #edf3e9; }
.site-footer .brand-mark { border-color: #d6e7d6; }
.site-footer .brand-mark::before, .site-footer .brand-mark::after, .site-footer .brand-mark span { background: #d6e7d6; }
.site-footer .brand-name small { color: var(--acid); }
.footer-about p { max-width: 290px; margin-top: 24px; color: #a9c2bd; font-size: 13px; line-height: 1.7; }
.footer-links strong { display: block; margin-bottom: 15px; font-size: 11px; text-transform: uppercase; letter-spacing: .16em; color: var(--acid); }
.footer-links a { display: block; width: fit-content; margin: 9px 0; color: #d6e4dd; font-size: 13px; }
.footer-links a:hover { color: var(--acid); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 20px; border-top: 1px solid #31535a; color: #91aaa7; font-size: 11px; }

@media (max-width: 900px) {
  .nav-links { gap: 14px; }
  .hero-inner { grid-template-columns: 1.2fr .8fr; }
  .hero-visual { transform: scale(.83); transform-origin: center; }
  .directory-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 700px) {
  .wrap { width: min(100% - 36px, 1180px); }
  .header-inner { min-height: 72px; flex-wrap: wrap; gap: 0; padding-top: 15px; }
  .nav-links { width: 100%; overflow-x: auto; justify-content: space-between; gap: 17px; padding-block: 14px; white-space: nowrap; scrollbar-width: none; }
  .nav-links::-webkit-scrollbar { display: none; }
  .nav-links .nav-feature { padding: 0; background: none; color: #486168; }
  .hero-inner { display: block; min-height: 0; padding-block: 69px 55px; }
  .hero h1 { margin-top: 20px; }
  .hero-visual { min-height: 310px; margin-top: 40px; transform: none; }
  .orbit { width: 320px; }
  .atom-card { width: 165px; min-height: 195px; padding: 16px; }
  .atom-symbol { font-size: 64px; margin: 24px 0 11px; }
  .floating-label.one { right: 4%; }
  .floating-label.two { left: 4%; }
  .search-inner, .feature-split, .tool-layout, .article-layout { grid-template-columns: 1fr; }
  .search-inner { gap: 13px; }
  .section-head { align-items: start; flex-direction: column; }
  .category-grid, .tool-list, .resource-grid { grid-template-columns: 1fr; }
  .category-card { min-height: 180px; }
  .tool-row:nth-child(odd) { margin-right: 0; }
  .feature-art { min-height: 320px; }
  .closing-inner { align-items: start; flex-direction: column; }
  .page-hero { padding-block: 40px 49px; }
  .article-layout { gap: 15px; }
  .contents-card { position: static; grid-row: 1; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; padding-bottom: 40px; }
  .footer-about { grid-column: 1 / -1; }
}
@media (max-width: 480px) {
  .directory-grid { grid-template-columns: 1fr; }
  .hero-visual { min-height: 285px; }
  .orbit { width: 280px; }
  .floating-label { font-size: 9px; }
  .footer-bottom { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}