:root {
  --paper: #ffffff;
  --paper-soft: #f7f8fa;
  --paper-blue: #f2f6ff;
  --ink: #15171a;
  --ink-soft: #555d68;
  --ink-faint: #7c8590;
  --line: #dfe3e8;
  --line-dark: #b9c0c9;
  --blue: #1458d4;
  --blue-dark: #0c3f9e;
  --blue-soft: #dbe8ff;
  --green: #137044;
  --green-soft: #e3f5eb;
  --amber: #8a4c00;
  --amber-soft: #fff1d7;
  --red: #a72a21;
  --red-soft: #ffebe8;
  --shadow: 0 16px 42px rgba(27, 39, 57, .09);
  --radius: 8px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --paper: #111418;
  --paper-soft: #171b20;
  --paper-blue: #131d2c;
  --ink: #f2f5f8;
  --ink-soft: #bdc5cf;
  --ink-faint: #939da9;
  --line: #303741;
  --line-dark: #4d5865;
  --blue: #75a5ff;
  --blue-dark: #a8c6ff;
  --blue-soft: #1e3763;
  --green: #6dd8a1;
  --green-soft: #173727;
  --amber: #ffbd64;
  --amber-soft: #3c2c17;
  --red: #ff8d82;
  --red-soft: #40211f;
  --shadow: 0 16px 42px rgba(0, 0, 0, .3);
  color-scheme: dark;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

body, button, input, select { font-family: var(--sans); }

a { color: inherit; text-decoration-thickness: .08em; text-underline-offset: .18em; }
a:hover { color: var(--blue); }
button, input, select { font: inherit; }
button { color: inherit; }
img, svg { display: block; max-width: 100%; }
[hidden] { display: none !important; }

h1, h2, h3, p, dl, dd { margin-top: 0; }
h1, h2, h3 { line-height: 1.08; letter-spacing: -.035em; }
h1 { margin-bottom: 20px; font-size: clamp(2.55rem, 5vw, 5.4rem); font-weight: 680; }
h2 { margin-bottom: 18px; font-size: clamp(1.75rem, 3vw, 2.7rem); font-weight: 650; }
h3 { margin-bottom: 8px; font-size: 1.15rem; }

.shell { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }
.narrow { width: min(760px, calc(100% - 48px)); margin-inline: auto; }
.section { padding-block: 88px; }
.lead { max-width: 760px; margin-bottom: 30px; color: var(--ink-soft); font-size: clamp(1.1rem, 2vw, 1.36rem); line-height: 1.55; }
.section-label { margin-bottom: 12px; color: var(--blue); font-family: var(--mono); font-size: .78rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 1000; top: 12px; left: 12px; transform: translateY(-160%); padding: 10px 14px; background: var(--ink); color: var(--paper); border-radius: 4px; }
.skip-link:focus { transform: none; }
.icon { width: 20px; height: 20px; flex: 0 0 auto; }

:focus-visible { outline: 3px solid color-mix(in srgb, var(--blue) 55%, transparent); outline-offset: 3px; }

.site-header {
  position: relative;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  backdrop-filter: blur(14px);
}

.site-header__inner { display: grid; grid-template-columns: 1fr auto auto; align-items: center; min-height: 74px; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; width: max-content; color: var(--ink); font-weight: 720; text-decoration: none; letter-spacing: -.025em; }
.brand:hover { color: var(--ink); }
.brand__mark { display: grid; width: 34px; height: 34px; place-items: center; border: 1.5px solid var(--ink); border-radius: 50%; }
.brand__mark .icon { width: 21px; height: 21px; }
.brand__name { font-size: 1.05rem; }
.site-nav { display: flex; align-items: stretch; align-self: stretch; gap: 34px; }
.site-nav a { display: grid; position: relative; place-items: center; color: var(--ink-soft); font-size: .92rem; font-weight: 620; text-decoration: none; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); }
.site-nav a[aria-current="page"]::after { position: absolute; right: 0; bottom: -1px; left: 0; height: 2px; background: var(--blue); content: ""; }
.icon-button { display: inline-grid; width: 40px; height: 40px; padding: 0; place-items: center; border: 1px solid var(--line); border-radius: 50%; background: transparent; cursor: pointer; }
.icon-button:hover { border-color: var(--line-dark); background: var(--paper-soft); }
.theme-toggle__moon, :root[data-theme="dark"] .theme-toggle__sun { display: none; }
:root[data-theme="dark"] .theme-toggle__moon { display: block; }
.site-header__menu { display: none; }

.home-hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); }
.home-hero::after { position: absolute; z-index: -1; inset: 0 0 0 52%; background: linear-gradient(145deg, var(--paper-soft), transparent 72%); content: ""; }
.home-hero__grid { display: grid; grid-template-columns: minmax(0, .95fr) minmax(440px, 1.05fr); min-height: 665px; align-items: center; gap: 66px; }
.home-hero__copy { padding-block: 86px; }
.home-hero h1 { max-width: 680px; }
.home-hero__media { padding-block: 54px; }
.hero-diagram { width: 100%; color: var(--ink); }
.hero-diagram path, .hero-diagram rect, .hero-diagram ellipse { fill: none; stroke: currentColor; stroke-width: 1.15; vector-effect: non-scaling-stroke; }
.hero-diagram text { fill: currentColor; stroke: none; font-family: var(--mono); font-size: 13px; text-anchor: middle; }
.hero-diagram .diagram-rail { color: var(--line-dark); stroke-dasharray: 4 5; }
.trust-line { display: flex; align-items: center; gap: 10px; margin: 16px 0 0; color: var(--ink-faint); font-size: .78rem; font-weight: 590; }
.trust-line .icon { color: var(--blue); }

.search-combobox { position: relative; display: grid; grid-template-columns: auto 1fr; min-width: min(460px, 100%); border: 1px solid var(--line-dark); border-radius: var(--radius); background: var(--paper); box-shadow: 0 2px 0 color-mix(in srgb, var(--ink) 5%, transparent); }
.search-combobox:focus-within { border-color: var(--blue); box-shadow: 0 0 0 3px color-mix(in srgb, var(--blue) 15%, transparent); }
.search-combobox__icon { display: grid; padding-left: 18px; place-items: center; color: var(--ink-faint); }
.search-combobox input { min-width: 0; height: 54px; padding: 0 18px 0 12px; border: 0; outline: 0; background: transparent; color: var(--ink); }
.search-combobox input::placeholder { color: var(--ink-faint); }
.search-combobox--large { grid-template-columns: auto 1fr auto; }
.search-combobox--large input { height: 62px; font-family: var(--mono); font-size: 1rem; }
.search-combobox--large .button { min-height: 48px; margin: 6px; }
.search-results { position: absolute; z-index: 80; top: calc(100% + 8px); right: 0; left: 0; overflow: hidden; border: 1px solid var(--line-dark); border-radius: var(--radius); background: var(--paper); box-shadow: var(--shadow); }
.search-results a { display: grid; grid-template-columns: 90px minmax(0, 1fr) auto auto; align-items: center; gap: 14px; min-height: 64px; padding: 10px 16px; border-bottom: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.search-results a:last-child { border-bottom: 0; }
.search-results a:hover, .search-results a[aria-selected="true"] { background: var(--paper-blue); }
.search-results strong { font-family: var(--mono); }
.search-results span { overflow: hidden; color: var(--ink-soft); font-size: .83rem; text-overflow: ellipsis; white-space: nowrap; }
.search-results small { color: var(--ink-faint); font-size: .75rem; }

.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; gap: 9px; padding: 0 20px; border: 1px solid transparent; border-radius: 5px; font-size: .9rem; font-weight: 700; text-decoration: none; cursor: pointer; }
.button--primary { border-color: var(--blue); background: var(--blue); color: #fff; }
.button--primary:hover { border-color: var(--blue-dark); background: var(--blue-dark); color: #fff; }
.button--secondary { border-color: var(--line-dark); background: var(--paper); color: var(--ink); }
.button--secondary:hover { border-color: var(--ink); background: var(--paper-soft); color: var(--ink); }
.text-link { display: inline-flex; align-items: center; gap: 7px; font-weight: 680; text-decoration: none; }
.text-link--blue { color: var(--blue); }

.workflow-section { padding-block: 74px; }
.workflow-section h2 { font-size: 1.85rem; }
.workflow-rail { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.workflow-rail > a { display: grid; grid-template-columns: auto auto 1fr; gap: 16px; min-height: 150px; align-items: center; padding: 24px 26px; border-right: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.workflow-rail > a:last-child { border-right: 0; }
.workflow-rail > a:hover { background: var(--paper-soft); }
.workflow-rail > a > span { align-self: start; color: var(--ink-faint); font-family: var(--mono); font-size: .72rem; }
.workflow-rail > a > i { display: grid; width: 44px; height: 44px; place-items: center; border: 1px solid var(--line-dark); border-radius: 50%; color: var(--blue); font-style: normal; }
.workflow-rail h3 { font-size: 1.08rem; }
.workflow-rail p { margin: 0; color: var(--ink-soft); font-size: .88rem; }

.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 26px; }
.section-heading h2, .section-heading p { margin-bottom: 0; }
.section-heading p { max-width: 520px; color: var(--ink-soft); }
.popular-section { border-top: 1px solid var(--line); }
.popular-list { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line-dark); }
.popular-list > a { display: grid; grid-template-columns: 54px 88px minmax(0, 1fr) auto; min-height: 88px; align-items: center; gap: 16px; padding: 14px 18px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.popular-list > a:nth-child(even) { border-right: 0; }
.popular-list > a:hover { background: var(--paper-soft); }
.popular-list strong { font-family: var(--mono); font-size: 1.02rem; }
.popular-list > a > span:nth-child(3) { color: var(--ink-soft); font-size: .82rem; }
.battery-glyph { display: grid; position: relative; width: 46px; height: 34px; place-items: center; border: 1px solid var(--ink); border-radius: 50%; font-family: var(--mono); }
.battery-glyph i { position: absolute; top: 1px; font-style: normal; font-size: .65rem; }
.battery-glyph--cylindrical { width: 23px; height: 48px; border-radius: 11px; }
.battery-glyph--rectangular, .battery-glyph--camera-pack { width: 38px; height: 46px; border-radius: 3px; }

.methodology-band { padding-block: 96px; background: #102f69; color: #fff; }
:root[data-theme="dark"] .methodology-band { background: #0e2449; }
.methodology-band__grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(430px, .9fr); align-items: center; gap: 90px; }
.methodology-band h2 { max-width: 620px; }
.methodology-band p { max-width: 650px; color: #cfddf4; }
.methodology-band .text-link { color: #fff; }
.methodology-rules { display: grid; grid-template-columns: repeat(3, 1fr); margin: 34px 0; border-block: 1px solid rgba(255, 255, 255, .26); }
.methodology-rules span { display: grid; grid-template-columns: auto 1fr; gap: 2px 10px; padding: 18px 12px 18px 0; }
.methodology-rules .icon { grid-row: 1 / 3; margin-top: 2px; color: #8eb5ff; }
.methodology-rules strong { font-size: .82rem; }
.methodology-rules small { color: #b9c9e4; font-size: .7rem; }
.cutaway { position: relative; min-height: 360px; border: 1px solid rgba(255, 255, 255, .28); }
.cutaway::before, .cutaway::after { position: absolute; background: rgba(255, 255, 255, .18); content: ""; }
.cutaway::before { top: 50%; right: 0; left: 0; height: 1px; }
.cutaway::after { top: 0; bottom: 0; left: 50%; width: 1px; }
.cutaway__cell { position: absolute; top: 76px; left: 50%; width: 250px; height: 150px; transform: translateX(-50%); border: 1px solid #fff; border-radius: 50%; }
.cutaway__cell::before, .cutaway__cell::after { position: absolute; inset: 16px 22px; border: 1px solid rgba(255, 255, 255, .6); border-radius: 50%; content: ""; }
.cutaway__cell::after { inset: 34px 52px; }
.cutaway__cell span { position: absolute; z-index: 2; top: 8px; left: 50%; font-family: var(--mono); }
.cutaway__cell i { position: absolute; top: 74px; left: 50%; width: 105px; height: 1px; transform-origin: left; background: rgba(255, 255, 255, .45); }
.cutaway__cell i:nth-of-type(2) { transform: rotate(120deg); }
.cutaway__cell i:nth-of-type(3) { transform: rotate(230deg); }
.cutaway > p { position: absolute; margin: 0; color: #d4e2f8; font-family: var(--mono); font-size: .68rem; line-height: 1.5; text-transform: uppercase; }
.cutaway__size { top: 24px; left: 22px; }
.cutaway__terminal { top: 24px; right: 22px; text-align: right; }
.cutaway__electric { right: 22px; bottom: 22px; text-align: right; }

.guide-preview { border-bottom: 1px solid var(--line); }
.guide-links { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line-dark); }
.guide-links a { display: grid; grid-template-columns: auto 1fr auto; min-height: 76px; align-items: center; gap: 14px; padding: 12px 16px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.guide-links a:nth-child(even) { border-right: 0; }
.guide-links a:hover { background: var(--paper-soft); }
.guide-links a > .icon:first-child { color: var(--blue); }
.recent-section { padding-top: 48px; }

.page-hero { padding-block: 64px 70px; border-bottom: 1px solid var(--line); background: var(--paper-soft); }
.page-hero__inner { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 60px; }
.page-hero h1 { max-width: 850px; margin-bottom: 16px; font-size: clamp(2.45rem, 4.5vw, 4.5rem); }
.page-hero .lead { margin-bottom: 0; }
.hero-meta { display: grid; grid-template-columns: repeat(3, auto); margin: 0; border-top: 1px solid var(--line-dark); }
.hero-meta div { min-width: 110px; padding: 12px 18px; border-right: 1px solid var(--line); }
.hero-meta div:last-child { border-right: 0; }
.hero-meta dt { color: var(--ink-faint); font-size: .68rem; font-weight: 650; letter-spacing: .06em; text-transform: uppercase; }
.hero-meta dd { margin: 4px 0 0; font-family: var(--mono); font-size: .8rem; font-weight: 700; }
.breadcrumbs { padding-block: 18px; }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; list-style: none; }
.breadcrumbs li { display: inline-flex; align-items: center; gap: 6px; color: var(--ink-faint); font-size: .76rem; }
.breadcrumbs a { color: var(--ink-soft); text-decoration: none; }
.breadcrumbs .icon { width: 13px; height: 13px; }

.directory-tools { position: relative; z-index: 4; margin-bottom: 28px; }
.directory-tools .search-combobox { max-width: 740px; }
.filter-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.filter-row button { min-height: 36px; padding: 0 13px; border: 1px solid var(--line); border-radius: 999px; background: transparent; color: var(--ink-soft); font-size: .75rem; font-weight: 650; cursor: pointer; }
.filter-row button:hover, .filter-row button[aria-pressed="true"] { border-color: var(--ink); background: var(--ink); color: var(--paper); }
.result-count { margin: 18px 0 0; color: var(--ink-faint); font-family: var(--mono); font-size: .75rem; }
.battery-list { border-top: 1px solid var(--line-dark); }
.battery-row { display: grid; grid-template-columns: 62px 110px 1.2fr .7fr 1fr auto; min-height: 76px; align-items: center; gap: 16px; padding: 12px 16px; border-bottom: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.battery-row:hover { background: var(--paper-soft); color: var(--ink); }
.battery-row strong { font-family: var(--mono); }
.battery-row > span:not(.battery-glyph) { color: var(--ink-soft); font-size: .82rem; }
.battery-row[hidden] { display: none; }
.battery-list--compact .battery-row { grid-template-columns: 54px 90px 1fr .65fr 1fr auto; min-height: 68px; }

.profile-hero { padding-block: 62px 72px; border-bottom: 1px solid var(--line); background: var(--paper-soft); }
.profile-hero__grid { display: grid; grid-template-columns: 1fr minmax(400px, .75fr); align-items: center; gap: 90px; }
.profile-hero h1 { margin-bottom: 18px; font-size: clamp(2.6rem, 5vw, 4.8rem); }
.alias-list { display: flex; flex-wrap: wrap; gap: 8px; }
.alias-list span, .alias-list a { display: inline-flex; min-height: 30px; align-items: center; padding: 0 10px; border: 1px solid var(--line-dark); border-radius: 3px; color: var(--ink-soft); font-family: var(--mono); font-size: .75rem; text-decoration: none; }
.profile-hero__battery { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 28px; }
.profile-battery { display: grid; position: relative; width: 220px; aspect-ratio: 1.75; place-items: center; border: 2px solid var(--ink); border-radius: 50%; box-shadow: inset 0 0 0 12px var(--paper-soft), inset 0 0 0 13px var(--line-dark); }
.profile-battery span { font-family: var(--mono); font-size: 1.2rem; font-weight: 800; }
.profile-battery strong { position: absolute; top: 8px; font-family: var(--mono); }
.profile-battery small { position: absolute; bottom: 16px; color: var(--ink-soft); font-family: var(--mono); }
.profile-battery--cylindrical { width: 112px; height: 250px; aspect-ratio: auto; border-radius: 48px; }
.profile-battery--rectangular, .profile-battery--camera-pack { width: 175px; height: 230px; aspect-ratio: auto; border-radius: 8px; }
.profile-hero__battery dl { margin: 0; border-top: 1px solid var(--line-dark); }
.profile-hero__battery dl div { padding: 12px 0; border-bottom: 1px solid var(--line); }
.profile-hero__battery dt { color: var(--ink-faint); font-size: .68rem; text-transform: uppercase; }
.profile-hero__battery dd { margin: 2px 0 0; font-family: var(--mono); font-size: .8rem; font-weight: 700; }
.article-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, 350px); align-items: start; gap: 80px; }
.prose { color: var(--ink-soft); }
.prose h2 { margin-top: 48px; color: var(--ink); font-size: 1.55rem; }
.prose h2:first-child, .prose section:first-child h2 { margin-top: 0; }
.prose p, .prose li { max-width: 730px; }
.prose li + li { margin-top: 9px; }
.prose a { color: var(--blue); }
.spec-grid { display: grid; grid-template-columns: repeat(2, 1fr); margin-bottom: 42px; border-top: 1px solid var(--line-dark); }
.spec-grid div { display: grid; gap: 4px; padding: 16px 12px 16px 0; border-bottom: 1px solid var(--line); }
.spec-grid span { color: var(--ink-faint); font-size: .72rem; text-transform: uppercase; }
.spec-grid strong { color: var(--ink); font-family: var(--mono); font-size: .87rem; }
.caution-panel { padding: 28px; border-top: 4px solid var(--amber); background: var(--amber-soft); color: var(--ink-soft); }
.caution-panel h2 { color: var(--ink); font-size: 1.35rem; }
.caution-panel ul { padding-left: 20px; }
.caution-panel li + li { margin-top: 10px; }
.caution-panel .button, .caution-panel .text-link { width: 100%; margin-top: 14px; }
.comparison-link-list, .comparison-directory, .size-list { border-top: 1px solid var(--line-dark); }
.comparison-link-list a, .comparison-directory a, .size-list a { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; min-height: 66px; align-items: center; gap: 18px; padding: 12px 14px; border-bottom: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.comparison-link-list a:hover, .comparison-directory a:hover, .size-list a:hover { background: var(--paper-soft); }
.comparison-link-list span, .comparison-directory span { font-family: var(--mono); font-weight: 700; }
.comparison-directory { display: grid; grid-template-columns: repeat(2, 1fr); }
.comparison-directory a:nth-child(odd) { border-right: 1px solid var(--line); }
.comparison-directory i { color: var(--ink-faint); font-family: var(--sans); font-style: normal; font-weight: 400; }
.status-text { color: var(--ink-soft); font-size: .7rem; font-weight: 750; text-transform: uppercase; }
.status-text--exact { color: var(--green); }
.status-text--conditional { color: var(--amber); }
.status-text--no { color: var(--red); }

.compare-workbench { padding-block: 56px 78px; border-bottom: 1px solid var(--line); background: var(--paper-soft); }
.compare-form { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto; align-items: end; gap: 16px; margin-bottom: 38px; padding: 22px; border: 1px solid var(--line); background: var(--paper); }
.compare-select label { display: block; margin-bottom: 8px; color: var(--ink-soft); font-size: .75rem; font-weight: 700; }
.compare-select__row { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; min-height: 74px; align-items: center; gap: 10px; border-bottom: 1px solid var(--line-dark); }
.compare-select__row > span { color: var(--ink-faint); }
.compare-select input { min-width: 0; height: 56px; border: 0; outline: 0; background: transparent; color: var(--ink); font-family: var(--mono); font-size: 1.15rem; font-weight: 700; }
.selector-art { display: grid; position: relative; width: 72px; height: 48px; place-items: center; border: 1px solid var(--ink); border-radius: 50%; font-family: var(--mono); }
.selector-art span { font-size: .62rem; font-weight: 700; }
.selector-art small { font-size: .5rem; }
.selector-art i { position: absolute; top: -1px; font-size: .55rem; font-style: normal; }
.selector-art--cylindrical { width: 25px; height: 58px; border-radius: 12px; }
.selector-art--rectangular, .selector-art--camera-pack { width: 43px; height: 58px; border-radius: 3px; }
.swap-button { display: grid; width: 42px; height: 42px; margin-bottom: 15px; padding: 0; place-items: center; border: 1px solid var(--line-dark); border-radius: 50%; background: var(--paper); cursor: pointer; }
.swap-button:hover { border-color: var(--blue); color: var(--blue); }
.compare-submit { margin-bottom: 10px; white-space: nowrap; }
.comparison-result { overflow: hidden; border: 1px solid var(--line-dark); background: var(--paper); }
.comparison-result--exact { border-top: 5px solid var(--green); }
.comparison-result--conditional { border-top: 5px solid var(--amber); }
.comparison-result--no { border-top: 5px solid var(--red); }
.verdict-band { display: grid; grid-template-columns: 200px minmax(0, 1fr) minmax(220px, .6fr); align-items: center; gap: 30px; min-height: 148px; padding: 26px 30px; border-bottom: 1px solid var(--line); }
.verdict-band__status { display: flex; align-items: center; gap: 10px; font-size: .77rem; text-transform: uppercase; }
.comparison-result--exact .verdict-band__status { color: var(--green); }
.comparison-result--conditional .verdict-band__status { color: var(--amber); }
.comparison-result--no .verdict-band__status { color: var(--red); }
.verdict-band h2 { margin-bottom: 8px; font-size: 1.4rem; }
.verdict-band p { margin: 0; color: var(--ink-soft); font-size: .86rem; }
.verdict-band__rule { display: flex; gap: 10px; padding-left: 24px; border-left: 1px solid var(--line); }
.verdict-band__rule .icon { color: var(--blue); }
.table-scroll { overflow-x: auto; }
.comparison-table { width: 100%; border-collapse: collapse; }
.comparison-table th, .comparison-table td { padding: 15px 20px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.comparison-table thead th { background: var(--paper-soft); font-family: var(--mono); font-size: .78rem; }
.comparison-table tbody th { width: 26%; color: var(--ink-faint); font-size: .75rem; text-transform: uppercase; }
.comparison-table tbody td { font-size: .86rem; }
.comparison-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; padding: 18px 20px; }
.comparison-actions a, .comparison-actions button { display: inline-flex; align-items: center; gap: 7px; border: 0; background: none; color: var(--blue); font-size: .78rem; font-weight: 700; text-decoration: none; cursor: pointer; }

.size-actions { margin-bottom: 28px; }
.size-list a { grid-template-columns: minmax(170px, .35fr) 1fr auto; }
.size-list strong { font-family: var(--mono); }
.size-list span { color: var(--ink-soft); font-size: .82rem; }
.measure-form { display: grid; grid-template-columns: repeat(3, minmax(150px, 1fr)) auto auto; align-items: end; gap: 16px; padding: 28px; border-top: 4px solid var(--blue); background: var(--paper-soft); }
.measure-form > div label { display: block; margin-bottom: 7px; font-size: .78rem; font-weight: 720; }
.measure-form label span { color: var(--ink-faint); font-weight: 500; }
.measure-form input, .measure-form select { width: 100%; height: 48px; padding: 0 12px; border: 1px solid var(--line-dark); border-radius: 4px; background: var(--paper); color: var(--ink); font-family: var(--mono); }
.measure-form .notice { grid-column: 1 / -1; }
.finder-output { margin-top: 44px; }
.finder-output > p { color: var(--ink-soft); }

.guide-directory { border-top: 1px solid var(--line-dark); }
.guide-directory > a { display: grid; grid-template-columns: 46px 1fr auto; min-height: 122px; align-items: center; gap: 24px; padding: 20px 14px; border-bottom: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.guide-directory > a:hover { background: var(--paper-soft); }
.guide-directory > a > span { color: var(--ink-faint); font-family: var(--mono); font-size: .72rem; }
.guide-directory h2 { margin-bottom: 8px; font-size: 1.3rem; }
.guide-directory p { margin: 0; color: var(--ink-soft); font-size: .88rem; }
.guide-article section { padding: 0 0 10px; }
.guide-side { position: sticky; top: 30px; border-top: 3px solid var(--blue); }
.guide-side h2 { margin: 18px 14px 10px; font-size: 1.1rem; }
.guide-side a { display: flex; align-items: center; justify-content: space-between; gap: 10px; min-height: 54px; padding: 10px 14px; border-bottom: 1px solid var(--line); color: var(--ink); font-size: .8rem; font-weight: 700; text-decoration: none; }
.guide-side a:hover { background: var(--paper-soft); }
.notice { padding: 18px 20px; border-left: 4px solid var(--blue); background: var(--paper-blue); color: var(--ink-soft); }
.notice p { margin: 5px 0 0; }
.source-list { padding-left: 22px; }
.source-list li { padding: 8px 0 14px 8px; border-bottom: 1px solid var(--line); }
.source-list a { font-size: .86rem; }
.source-list p { margin: 4px 0 0; color: var(--ink-faint); font-size: .76rem; }
.trust-prose section { padding-bottom: 12px; }

.not-found { display: grid; min-height: 64vh; place-items: center; padding-block: 90px; background: linear-gradient(150deg, var(--paper-soft), var(--paper)); }
.not-found h1 { font-size: clamp(3rem, 7vw, 6rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.site-footer { padding-block: 48px; border-top: 1px solid var(--line); background: var(--paper-soft); }
.footer-nav { display: flex; flex-wrap: wrap; gap: 10px 24px; padding-bottom: 26px; border-bottom: 1px solid var(--line); }
.footer-nav a { color: var(--ink-soft); font-size: .78rem; font-weight: 650; text-decoration: none; }
.footer-note { display: flex; align-items: center; gap: 12px; padding-block: 23px 10px; }
.footer-note .icon { color: var(--blue); }
.footer-note p, .footer-meta { margin: 0; color: var(--ink-faint); font-size: .75rem; }
.footer-meta { font-family: var(--mono); }
.toast { position: fixed; z-index: 100; right: 24px; bottom: 24px; max-width: min(360px, calc(100% - 48px)); padding: 12px 16px; border: 1px solid var(--line-dark); border-radius: 5px; background: var(--ink); color: var(--paper); box-shadow: var(--shadow); font-size: .82rem; }

@media (max-width: 980px) {
  .home-hero__grid { grid-template-columns: 1fr; gap: 0; }
  .home-hero__copy { padding-bottom: 24px; }
  .home-hero__media { max-width: 720px; padding-block: 10px 54px; }
  .methodology-band__grid, .profile-hero__grid { grid-template-columns: 1fr; gap: 58px; }
  .page-hero__inner { grid-template-columns: 1fr; gap: 30px; }
  .hero-meta { width: max-content; max-width: 100%; }
  .compare-form { grid-template-columns: 1fr auto 1fr; }
  .compare-submit { grid-column: 1 / -1; width: 100%; margin: 0; }
  .verdict-band { grid-template-columns: 160px 1fr; }
  .verdict-band__rule { grid-column: 1 / -1; padding: 18px 0 0; border-top: 1px solid var(--line); border-left: 0; }
  .measure-form { grid-template-columns: repeat(3, 1fr); }
  .measure-form .button { grid-column: span 2; }
  .measure-form .button--secondary { grid-column: span 1; }
}

@media (max-width: 760px) {
  .shell, .narrow { width: min(100% - 32px, 1180px); }
  .section { padding-block: 58px; }
  h1 { font-size: clamp(2.5rem, 13vw, 4rem); }
  .lead { font-size: 1.05rem; }
  .site-header__inner { grid-template-columns: 1fr auto auto; min-height: 64px; gap: 8px; }
  .brand__name { font-size: .94rem; }
  .brand__mark { width: 31px; height: 31px; }
  .site-header__menu { display: inline-grid; }
  .site-nav { display: none; position: absolute; top: 64px; right: 16px; left: 16px; height: auto; padding: 8px; border: 1px solid var(--line-dark); border-radius: 6px; background: var(--paper); box-shadow: var(--shadow); }
  .site-nav[data-open] { display: grid; }
  .site-nav a { display: flex; min-height: 48px; padding: 0 12px; }
  .site-nav a[aria-current="page"]::after { top: 10px; right: auto; bottom: 10px; left: 0; width: 2px; height: auto; }
  .home-hero::after { inset: 50% 0 0; }
  .home-hero__grid { min-height: auto; }
  .home-hero__copy { padding-block: 64px 16px; }
  .home-hero h1 { font-size: clamp(3rem, 14vw, 4.3rem); }
  .home-hero__media { margin-inline: -8px; padding-bottom: 36px; }
  .search-combobox--large { grid-template-columns: auto 1fr; }
  .search-combobox--large .button { grid-column: 1 / -1; margin: 0; border-radius: 0 0 5px 5px; }
  .search-results a { grid-template-columns: 70px 1fr auto; }
  .search-results small { display: none; }
  .workflow-section { padding-block: 52px; }
  .workflow-rail { grid-template-columns: 1fr; }
  .workflow-rail > a { min-height: 116px; border-right: 0; border-bottom: 1px solid var(--line); }
  .workflow-rail > a:last-child { border-bottom: 0; }
  .section-heading { display: block; }
  .section-heading p { margin-top: 8px; }
  .popular-list, .guide-links, .comparison-directory { grid-template-columns: 1fr; }
  .popular-list > a, .popular-list > a:nth-child(even), .guide-links a, .guide-links a:nth-child(even), .comparison-directory a:nth-child(odd) { border-right: 0; }
  .popular-list > a { grid-template-columns: 46px 72px 1fr auto; padding-inline: 8px; }
  .popular-list > a > span:nth-child(3) { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .methodology-band { padding-block: 66px; }
  .methodology-band__grid { gap: 48px; }
  .methodology-rules { grid-template-columns: 1fr; }
  .methodology-rules span { border-bottom: 1px solid rgba(255, 255, 255, .18); }
  .methodology-rules span:last-child { border-bottom: 0; }
  .cutaway { min-height: 310px; }
  .cutaway__cell { width: 210px; height: 132px; }
  .page-hero { padding-block: 46px 52px; }
  .page-hero h1 { font-size: clamp(2.35rem, 12vw, 3.5rem); }
  .hero-meta { grid-template-columns: 1fr; width: 100%; }
  .hero-meta div { padding-inline: 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .battery-row, .battery-list--compact .battery-row { grid-template-columns: 46px 82px 1fr auto; gap: 10px; min-height: 72px; padding-inline: 8px; }
  .battery-row > span:nth-of-type(n+3) { display: none; }
  .battery-row > span:nth-of-type(2) { display: block; }
  .profile-hero { padding-block: 46px 54px; }
  .profile-hero__grid { gap: 42px; }
  .profile-hero__battery { grid-template-columns: 1fr; }
  .profile-battery { margin-inline: auto; }
  .article-grid { grid-template-columns: 1fr; gap: 48px; }
  .spec-grid { grid-template-columns: 1fr; }
  .compare-workbench { padding-block: 34px 58px; }
  .compare-form { grid-template-columns: 1fr; padding: 16px; }
  .swap-button { margin: 0 auto; transform: rotate(90deg); }
  .compare-submit { grid-column: auto; }
  .verdict-band { grid-template-columns: 1fr; gap: 20px; padding: 22px 18px; }
  .verdict-band__rule { grid-column: auto; }
  .comparison-table { min-width: 620px; }
  .comparison-actions { align-items: flex-start; flex-direction: column; }
  .comparison-link-list a, .comparison-directory a { grid-template-columns: 1fr auto; }
  .comparison-link-list .icon, .comparison-directory .icon { display: none; }
  .size-list a { grid-template-columns: 1fr auto; }
  .size-list span { grid-row: 2; grid-column: 1 / -1; }
  .measure-form { grid-template-columns: 1fr; padding: 20px; }
  .measure-form .button, .measure-form .button--secondary { grid-column: auto; }
  .guide-directory > a { grid-template-columns: 34px 1fr; gap: 14px; }
  .guide-directory > a > .icon { display: none; }
  .guide-directory h2 { font-size: 1.16rem; }
  .guide-side { position: static; }
  .footer-nav { display: grid; grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 420px) {
  .brand__name { max-width: 112px; line-height: 1.05; }
  .home-hero h1 { font-size: 3rem; }
  .trust-line { align-items: flex-start; }
  .hero-diagram { transform: scale(1.04); }
  .popular-list > a { grid-template-columns: 42px 66px minmax(0, 1fr) auto; gap: 8px; }
  .selector-art { display: none; }
  .compare-select__row { grid-template-columns: auto minmax(0, 1fr); }
  .cutaway__cell { width: 180px; height: 115px; }
  .cutaway > p { font-size: .58rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

@media print {
  .site-header, .site-footer, .compare-form, .search-combobox, .comparison-actions, .hero-actions { display: none !important; }
  :root { --paper: #fff; --ink: #000; --ink-soft: #222; --line: #bbb; }
  body { font-size: 11pt; }
  .section, .page-hero, .profile-hero { padding-block: 24px; }
  a { text-decoration: none; }
}