/* CAL-45 shared design system. Existing specialized calculator controls remain in style.css. */
:root {
  --bg: #f6f8fc;
  --bg-soft: #f0f4f9;
  --surface: #fff;
  --surface-strong: #f7f9fc;
  --calculator-input-bg: #fff;
  --text: #0b172a;
  --muted: #53647c;
  --border: #dce4ef;
  --primary: #2563eb;
  --primary-strong: #1d4ed8;
  --primary-soft: #edf3ff;
  --success: #15803d;
  --success-soft: #eefbf3;
  --cta: #f97316;
  --cta-dark: #ea580c;
  --shadow: 0 4px 18px rgb(11 23 42 / 4%);
  --shadow-soft: 0 2px 8px rgb(11 23 42 / 3%);
  --radius: 12px;
}
[data-theme="dark"] {
  --bg: #0b1321;
  --bg-soft: #111d2f;
  --surface: #131f31;
  --surface-strong: #18263b;
  --calculator-input-bg: #0f1a2b;
  --text: #edf2fa;
  --muted: #acbad0;
  --border: #2b3b53;
  --primary: #83b4ff;
  --primary-strong: #a3c9ff;
  --primary-soft: #1d3354;
  --success: #76dfa1;
  --success-soft: #133329;
  --cta: #fb923c;
  --cta-dark: #fdba74;
  --danger: #ff9d9d;
  --shadow: 0 4px 18px rgb(0 0 0 / 8%);
  --shadow-soft: none;
}
body { background: var(--bg); font-weight: 400; line-height: 1.6; }
h1,h2,h3,h4 { color: var(--text); font-weight: 650; letter-spacing: -.025em; overflow-wrap: break-word; }
h1 { font-size: clamp(1.85rem, 3.2vw, 2.7rem); line-height: 1.15; }
h2 { font-size: clamp(1.3rem, 2vw, 1.65rem); line-height: 1.3; }
h3 { font-size: 1.05rem; line-height: 1.4; }
p { color: var(--muted); }
button,input,select,textarea { font: inherit; }
button,a,input,select,textarea { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
input,select,textarea { background: var(--calculator-input-bg); color: var(--text); border-color: var(--border); border-radius: 8px; min-width: 0; font-weight: 400; font-size: 1rem; }
input::placeholder,textarea::placeholder { color: var(--muted); opacity: 1; }
input[type="checkbox"],input[type="radio"] { accent-color: var(--primary); }
:focus-visible { outline: 3px solid var(--primary); outline-offset: 3px; }
[hidden] { display: none !important; }
.ui-icon { width: 1.3rem; height: 1.3rem; flex: 0 0 auto; vertical-align: middle; stroke-width: 1.75; }
.nav-shell,.page-shell,.footer-grid,.footer-bottom,.calculator-app { width: min(1280px, calc(100% - 3rem)); }
.page-shell { padding-block: 1.5rem 3.5rem; }
.breadcrumb { margin: 0 0 1.4rem; font-size: .8rem; font-weight: 400; }
.breadcrumb ol { flex-wrap: wrap; row-gap: .3rem; }
.eyebrow { font-size: .72rem; font-weight: 650; letter-spacing: .06em; color: var(--primary); }
.section-block { margin-block: 2.25rem; }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.section-heading h1,.section-heading h2,.section-heading p { margin: 0; }
.section-heading > a,.section-heading .category-directory-link { color: var(--primary); font-weight: 500; font-size: .9rem; border: 0; box-shadow: none; padding: .5rem 0; background: none; }
.section-heading > .eyebrow { width: 100%; margin-bottom: -.7rem; }
.button,.icon-button,.nav-action { border-radius: 8px; box-shadow: none; font-weight: 600; min-height: 44px; transform: none; }
.button:hover,.icon-button:hover,.tool-card:hover,.category-card:hover { transform: none; box-shadow: none; }
.button-primary { background: #2563eb; color: #fff; border: 1px solid #2563eb; }
.button-primary:hover { background: #1d4ed8; border-color: #1d4ed8; color: #fff; }
.button-cta { background: var(--cta); color: #19140e; border: 1px solid var(--cta); }
.button-cta:hover { background: var(--cta-dark); color: #19140e; }
.button-secondary,.icon-button { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
.button-secondary:hover,.icon-button:hover { background: var(--surface-strong); color: var(--primary); }
/* One compact header, with mobile search and navigation opened on demand. */
.site-design .site-header { background: var(--surface); backdrop-filter: none; box-shadow: none; }
.site-design .site-header:not(.app-header) .nav-shell,.site-design .site-header.app-header .nav-shell { display: flex; flex-wrap: nowrap; gap: 1rem; min-height: 72px; padding: .65rem 0; }
.site-design .site-header .brand { flex: 0 0 auto; }
.site-design .site-header .brand-logo { width: 176px; }
.site-design .site-header .site-nav { display: flex; position: static; width: auto; margin: 0 auto 0 1rem; padding: 0; border: 0; background: none; align-items: center; gap: 1.1rem; font-weight: 500; box-shadow: none; }
.site-design .site-header .site-nav a { font-size: .85rem; min-height: 44px; padding: .65rem 0; white-space: nowrap; }
.site-design .site-header .mobile-favorites-link { display: none; }
.site-design .site-header:not(.app-header) .header-search { display: block; flex: 1 1 10rem; width: auto; max-width: 190px; margin: 0; }
.header-search input { min-height: 42px; padding: .6rem 2rem .6rem .8rem; font-size: .8rem; border-color: var(--border); }
.header-search .search-key { right: .65rem; color: var(--muted); background: none; border: 0; box-shadow: none; }
.header-search .search-key svg { width: 16px; height: 16px; }
.site-design .site-header .locale-switcher { flex: 0 0 122px; width: 122px; max-width: none; margin: 0; }
.site-design .site-header .locale-switcher select { min-height: 42px; font-size: .76rem; font-weight: 500; padding: .6rem 1.1rem .6rem 1.9rem; background: var(--surface); border-color: var(--border); }
.site-design .site-header .locale-switcher-flag { left: .55rem; font-size: 1rem; }
.site-design .site-header .favorites-action { min-width: 44px; width: 44px; min-height: 42px; padding: 0; display: grid; place-items: center; background: var(--surface); }
.site-design .site-header .favorites-action > span:not(.favorites-count) { display: none; }
.site-design .site-header .favorites-action .ui-icon { color: var(--cta); width: 19px; height: 19px; }
.site-design .site-header .theme-toggle { display: inline-flex; align-items: center; justify-content: center; gap: 3px; width: 76px; height: 42px; min-width: 76px; padding: 3px; margin: 0; border: 1px solid var(--border); background: var(--surface); box-shadow: none; }
.site-design .site-header .theme-option { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 6px; color: var(--muted); background: none; box-shadow: none; }
[data-theme="light"] .theme-option-light,[data-theme="dark"] .theme-option-dark { color: var(--primary); background: var(--primary-soft); }
.site-design .site-header .menu-toggle,.header-search-toggle { display: none; }
/* Search suggestions reuse the keyboard behavior across pages. */
.search-panel { position: relative; }
.search-results { position: absolute; top: calc(100% + 6px); left: 0; right: auto; width: max(100%, min(30rem, calc(100vw - 3rem))); max-height: min(28rem, 50vh); overflow: auto; background: var(--surface); color: var(--text); box-shadow: 0 12px 36px rgb(0 0 0 / 15%); border: 1px solid var(--border); border-radius: 10px; z-index: 100; }
.header-search .search-results { left: auto; right: 0; }
.search-results a { display: block; padding: .9rem 1rem; border-bottom: 1px solid var(--border); }
.search-results a:hover,.search-results a:focus-visible { color: var(--text); background: var(--primary-soft); }
.search-results strong { font-weight: 600; font-size: .95rem; }
.search-results p { margin: .2rem 0 0; font-size: .85rem; line-height: 1.45; text-transform: none; }
.search-results > p { padding: 1rem; }
/* Homepage. */
.home-page .hero--calculator { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(280px, 1fr); align-items: center; gap: 3rem; width: min(1280px, calc(100% - 3rem)); margin: 0 auto; padding: 2.5rem 0; min-height: 0; background: none; border: 0; }
.hero--calculator::before,.hero--calculator::after,.hero-content::before,.hero-content::after { display: none; }
.home-page .hero-content { padding: 0; max-width: none; background: none; }
.hero--calculator h1 { font-size: clamp(2.2rem, 4.1vw, 3.65rem); max-width: 100%; line-height: 1.08; letter-spacing: -.04em; margin: .7rem 0 1rem; font-weight: 700; }
.hero--calculator .hero-copy { font-size: 1.08rem; max-width: 44rem; margin: 0 0 1.5rem; line-height: 1.6; }
.home-page .discovery-search { display: flex; gap: .5rem; padding: .4rem; margin: 0; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); box-shadow: var(--shadow-soft); }
.home-page .discovery-search input { border: 0; background: transparent; padding: .5rem .65rem; min-height: 48px; flex: 1; width: 0; }
.home-page .search-submit { flex: 0 0 auto; padding: .6rem 1.2rem; }
.hero--calculator .quick-links { display: flex; flex-wrap: wrap; gap: .6rem; margin: 1rem 0 0; }
.hero--calculator .quick-links a { display: inline-flex; align-items: center; gap: .5rem; border: 1px solid var(--border); background: var(--surface); color: var(--text); border-radius: 999px; padding: .55rem .85rem; min-height: 44px; font-weight: 500; font-size: .82rem; }
.hero--calculator .quick-links .ui-icon { color: var(--primary); width: 18px; height: 18px; }
.hero-standard-calculator { width: 100%; max-width: 440px; justify-self: end; padding: 1rem; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); box-shadow: var(--shadow); }
.hero-standard-calculator-display { min-height: 72px; padding: .6rem 1rem; border: 1px solid var(--border); border-radius: 8px; background: var(--calculator-input-bg); color: var(--text); font-size: 2.4rem; font-weight: 600; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.hero-standard-calculator-keys { gap: .5rem; margin-top: .65rem; }
.hero-standard-calculator-keys button { border: 1px solid var(--border); border-radius: 7px; min-height: 44px; padding: .45rem; font-size: 1rem; font-weight: 500; background: var(--surface); color: var(--text); box-shadow: none; }
.hero-standard-calculator-keys button:hover { background: var(--primary-soft); }
.hero-standard-calculator-keys [data-standard-calculator-operation],.hero-standard-calculator-keys .hero-standard-calculator-equals { background: #2563eb; border-color: #2563eb; color: #fff; }
.hero-standard-calculator-keys [data-standard-calculator-operation]:hover,.hero-standard-calculator-keys .hero-standard-calculator-equals:hover { background: #1d4ed8; }
.hero-standard-calculator-keys [data-standard-calculator-action="clear"],.hero-standard-calculator-keys [data-standard-calculator-action="backspace"],.hero-standard-calculator-keys [data-standard-calculator-action="percent"] { color: var(--primary); background: var(--primary-soft); }
.home-page > .page-shell { padding-top: 0; }
.home-page #popular { margin-top: 0; }
/* Shared tool and category cards, including cards created by favorites JS. */
.card-grid,.compact-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.tool-card,.category-card,.directory-section,.content-card,.blog-card,.featured-post { border: 1px solid var(--border); background: var(--surface); box-shadow: none; border-radius: var(--radius); }
.tool-card { position: relative; min-height: 132px; overflow: visible; }
.tool-card::before,.tool-card::after,.category-card::before,.category-card::after,.directory-section::before,.directory-section::after { display: none; }
.tool-card > a { display: grid; grid-template-columns: 48px minmax(0, 1fr); grid-template-rows: auto 1fr; gap: .3rem .9rem; min-height: 100%; padding: 1.1rem 3rem 1.1rem 1rem; background: none; }
.tool-card .tool-card-icon { display: grid; grid-column: 1; grid-row: 1 / 3; align-self: start; place-items: center; width: 48px; height: 48px; border: 0; border-radius: 9px; background: var(--primary-soft); color: var(--primary); box-shadow: none; font-size: 1.3rem; margin: 0; }
.tool-card .tool-card-icon .ui-icon { width: 27px; height: 27px; }
.tool-card-category { display: none; }
.tool-card h3 { grid-column: 2; margin: 0; color: var(--text); font-size: .95rem; font-weight: 600; line-height: 1.35; letter-spacing: -.015em; }
.tool-card p { grid-column: 2; margin: 0; font-size: .85rem; font-weight: 400; line-height: 1.5; color: var(--muted); text-transform: none; }
.tool-card-arrow { position: absolute; bottom: 1rem; right: .9rem; color: var(--primary); }
.tool-card:hover,.category-card:hover { border-color: var(--primary); }
.tool-card > a:focus-visible,.category-card > a:focus-visible { outline-offset: 3px; border-radius: var(--radius); }
.favorite-toggle--card { position: absolute; top: .4rem; right: .25rem; display: grid; place-items: center; width: 44px; height: 44px; min-width: 0; border: 0; padding: 0; background: transparent; box-shadow: none; color: var(--muted); }
.favorite-toggle-icon { display: grid; place-items: center; font-size: 1.35rem; }
.favorite-toggle-icon .ui-icon { width: 20px; height: 20px; }
.favorite-toggle.is-favorite { color: var(--cta); background: transparent; }
.favorite-toggle.is-favorite .ui-icon { fill: var(--cta); }
.category-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
.category-card { min-height: 0; padding: 0; overflow: visible; }
.category-card-main { position: relative; display: grid; grid-template-columns: 48px minmax(0,1fr); grid-template-rows: auto 1fr; column-gap: .9rem; row-gap: .35rem; padding: 1.2rem 2.6rem 1rem 1.1rem; min-height: 142px; }
.category-card-main .category-icon { grid-column: 1; grid-row: 1 / 3; position: static; display: grid; place-items: center; width: 48px; height: 48px; margin: 0; border: 0; border-radius: 9px; background: var(--primary-soft); color: var(--primary); box-shadow: none; }
.category-icon .ui-icon { width: 27px; height: 27px; }
.category-card h3 { grid-column: 2; margin: 0; font-size: 1rem; font-weight: 600; }
.category-card p { grid-column: 2; max-width: none; margin: 0; color: var(--muted); font-size: .85rem; font-weight: 400; }
.category-card-arrow { position: absolute; display: grid; place-items: center; right: 1rem; bottom: 1rem; width: auto; height: auto; border: 0; background: none; color: var(--primary); box-shadow: none; }
.category-examples { display: flex; flex-wrap: wrap; gap: .35rem 1rem; padding: 0 1.1rem 1.1rem; }
.category-examples a { color: var(--primary); font-size: .78rem; text-decoration: underline; text-underline-offset: 3px; }
.home-page .category-grid { grid-template-columns: repeat(4,minmax(0,1fr)); }
.category-card--compact .category-card-main { min-height: 90px; grid-template-columns: 34px minmax(0,1fr); grid-template-rows: auto; align-items: center; padding: 1rem 2.2rem 1rem 1rem; gap: .65rem; }
.category-card--compact .category-icon { width: 34px; height: 34px; background: none; }
.category-card--compact h3 { font-size: .85rem; }
.category-card--compact .category-card-arrow { right: .65rem; bottom: auto; top: calc(50% - 10px); }
.category-card--health .category-icon,.tool-card.category-card--health .tool-card-icon { color: #be185d; background: #fff0f5; }
.category-card--math .category-icon,.tool-card.category-card--math .tool-card-icon { color: #7c3aed; background: #f2edff; }
.category-card--property .category-icon,.tool-card.category-card--property .tool-card-icon { color: #087f83; background: #eafaf7; }
[data-theme="dark"] .category-card--health .category-icon,[data-theme="dark"] .tool-card.category-card--health .tool-card-icon { color: #ffa3ce; background: #3c2035; }
[data-theme="dark"] .category-card--math .category-icon,[data-theme="dark"] .tool-card.category-card--math .tool-card-icon { color: #c4afff; background: #30264d; }
[data-theme="dark"] .category-card--property .category-icon,[data-theme="dark"] .tool-card.category-card--property .tool-card-icon { color: #7ce1d5; background: #153b3b; }
/* Category discovery and listings. */
.categories-heading { margin-bottom: 1.5rem; }
.categories-heading h1 { font-size: clamp(1.85rem,3.2vw,2.7rem); }
.categories-heading p { font-weight: 400; margin-top: .65rem; }
.category-discovery { max-width: 48rem; margin-bottom: 1.5rem; }
.listing-search { position: relative; width: 100%; }
.listing-search input { padding-left: 2.75rem; min-height: 52px; background: var(--surface); }
.search-leading { position: absolute; top: 50%; left: .95rem; transform: translateY(-50%); color: var(--muted); pointer-events: none; }
.category-layout { display: grid; grid-template-columns: 210px minmax(0,1fr); align-items: start; gap: 2rem; }
.topic-sidebar { position: sticky; top: 96px; max-height: calc(100vh - 115px); overflow-y: auto; padding-right: 1rem; border-right: 1px solid var(--border); }
.topic-sidebar summary { font-size: .85rem; font-weight: 600; list-style: none; padding: .45rem .6rem .9rem; }
.topic-sidebar summary::-webkit-details-marker { display: none; }
.topic-sidebar nav { display: grid; gap: .2rem; }
.topic-sidebar nav a { display: flex; align-items: center; gap: .7rem; padding: .7rem .6rem; min-height: 44px; border-radius: 8px; font-size: .8rem; font-weight: 400; line-height: 1.4; color: var(--muted); }
.topic-sidebar nav a[aria-current],.topic-sidebar nav a:hover { background: var(--primary-soft); color: var(--primary); }
.category-detail-page .main-column { min-width: 0; }
.category-hero { padding: 0; margin: 0 0 1.5rem; border: 0; background: none; box-shadow: none; }
.category-hero::before,.category-hero::after { display: none; }
.category-hero .eyebrow { display: none; }
.category-hero h1 { margin: 0 0 .6rem; font-size: clamp(1.8rem,3vw,2.5rem); }
.category-hero > p { max-width: 72ch; margin: 0; font-size: .95rem; font-weight: 400; }
.listing-controls { margin: 0 0 1.25rem; }
.listing-toolbar { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between; margin-top: .8rem; }
.listing-filters { display: flex; gap: .5rem; flex-wrap: wrap; }
.filter-chip { min-height: 44px; border: 1px solid var(--border); background: var(--surface); color: var(--muted); padding: .5rem 1rem; border-radius: 999px; font-size: .85rem; }
.filter-chip.is-active { color: #fff; background: #2563eb; border-color: #2563eb; }
.listing-sort { display: flex; align-items: center; gap: .5rem; color: var(--muted); font-size: .8rem; }
.listing-sort select { width: 150px; min-height: 44px; padding: .5rem; font-size: .8rem; background: var(--surface); }
.listing-count { font-size: .8rem; margin: .7rem 0 0; }
.listing-empty { border: 1px dashed var(--border); border-radius: 12px; padding: 2rem; background: var(--surface); }
.listing-empty a { color: var(--primary); text-decoration: underline; }
.category-detail-page .category-tool-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: .8rem; }
.directory-section { padding: 0; border: 0; background: transparent; margin-block: 2rem; }
.directory-section .compact-heading { align-items: center; }
.directory-section-icon { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 8px; color: var(--primary); background: var(--primary-soft); }
.directory-section .compact-heading > div { flex: 1; }
.directory-section .compact-heading h2 { font-size: 1.3rem; }
.directory-section .compact-heading p { font-size: .85rem; font-weight: 400; max-width: 65ch; }
.category-request-bar { padding: 1rem; background: transparent; border: 0; border-top: 1px solid var(--border); box-shadow: none; font-size: .85rem; }
.category-request-bar strong { font-weight: 600; }
/* Calculator workspace and specialized form compatibility. */
.calculator-app { display: block; padding: 1.5rem 0 3.5rem; }
.calculator-main,.calculator-workspace { width: 100%; min-width: 0; }
.calculator-titlebar { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; margin: 0 0 1.5rem; }
.calculator-titlebar > div:not(.calculator-actions) { flex: 1 1 450px; min-width: 0; }
.calculator-titlebar .eyebrow { display: none; }
.calculator-titlebar h1 { margin: 0 0 .6rem; font-size: clamp(1.85rem,3.2vw,2.7rem); }
.calculator-titlebar p { font-size: 1rem; font-weight: 400; max-width: 80ch; margin: 0; }
.calculator-actions { display: flex; flex-wrap: wrap; gap: .5rem; }
.calculator-actions .icon-button,.calculator-actions .favorite-toggle { display: inline-flex; gap: .5rem; align-items: center; justify-content: center; min-height: 44px; padding: .55rem .8rem; font-size: .85rem; font-weight: 500; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--text); box-shadow: none; }
.calculator-actions .favorite-toggle-icon { color: var(--cta); }
.calculator-panels { display: grid; grid-template-columns: minmax(0,.95fr) minmax(0,1.05fr); gap: 1.25rem; align-items: start; }
.calculator-panels > .content-card { padding: 1.5rem; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); box-shadow: none; min-height: 0; }
.calculator-panels .panel-heading { display: flex; align-items: center; gap: .9rem; margin: 0 0 1.5rem; }
.calculator-panels .panel-heading::before,.calculator-panels .panel-heading h2::after { display: none; }
.calculator-panels .panel-icon { display: grid; place-items: center; width: 44px; height: 44px; background: var(--primary-soft); color: var(--primary); border-radius: 9px; }
.calculator-panels .panel-icon .ui-icon { width: 25px; height: 25px; }
.calculator-panels .results-panel .panel-icon { color: var(--success); background: var(--success-soft); }
.calculator-panels .panel-heading h2 { font-size: 1.1rem; font-weight: 600; margin: 0; }
.calculator-panels .panel-heading p { font-size: .85rem; margin: .15rem 0 0; }
.calculator-form { gap: 1rem; }
.calculator-form:not(.calculator-form--sectioned):not(.calculator-form--keypad) { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); }
.calculator-form > .form-actions,.calculator-form > .form-section { grid-column: 1 / -1; }
.calculator-form label,.input-label { font-size: .85rem; font-weight: 500; color: var(--text); }
.calculator-form label .input-hint { font-weight: 400; }
.calculator-form input,.calculator-form select { min-height: 48px; font-weight: 400; }
.calculator-form textarea { font-weight: 400; font-size: 1rem; }
.input-affix { font-weight: 400; font-size: .9rem; color: var(--muted); }
.form-section { background: transparent; border-color: var(--border); box-shadow: none; }
.form-section legend,.form-section-title { font-weight: 600; }
.form-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; margin-top: .3rem; border-top: 1px solid var(--border); padding-top: 1rem; }
.form-actions > .button-cta { flex: 1; max-width: 280px; }
.form-actions > .button-secondary { border: 0; background: transparent; color: var(--primary); padding: .6rem; text-decoration: underline; text-underline-offset: 3px; }
.result-card { padding: 0; border: 0; background: transparent; box-shadow: none; }
.result-card > .result-label { display: block; background: var(--success-soft); color: var(--muted); padding: .9rem 1rem .2rem; border-radius: 9px 9px 0 0; font-size: .85rem; font-weight: 500; }
.result-card > [data-result-value] { display: block; padding: .2rem 1rem 1rem; margin: 0; border-radius: 0 0 9px 9px; background: var(--success-soft); color: var(--success); font-size: clamp(1.7rem,3.5vw,3rem); font-weight: 650; line-height: 1.15; letter-spacing: -.035em; overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }
.result-card .result-unit { display: block; font-size: .95rem; font-weight: 500; color: var(--muted); margin-top: .35rem; letter-spacing: 0; }
.result-card[data-tone="error"] > .result-label,.result-card[data-tone="error"] > [data-result-value] { color: var(--danger); background: color-mix(in srgb,var(--danger) 8%,var(--surface)); }
.result-card[data-tone="neutral"] > .result-label,.result-card[data-tone="neutral"] > [data-result-value] { color: var(--muted); background: var(--surface-strong); }
.result-card[data-tone="neutral"] > [data-result-value],.result-card[data-tone="error"] > [data-result-value] { font-size: 1.5rem; }
.result-card .result-detail { margin-top: 1rem; font-size: .9rem; max-width: none; }
.result-card .result-detail strong,.result-card .result-metric strong { font-size: 1.05rem; line-height: 1.4; font-weight: 600; color: var(--text); letter-spacing: 0; }
.result-metrics { gap: .6rem; }
.result-metric { border-radius: 8px; background: var(--surface); box-shadow: none; padding: .8rem .8rem .8rem 3.3rem; }
.result-metric::before { width: 30px; height: 30px; left: .65rem; box-shadow: none; background-color: var(--success-soft); }
.result-metric::after { left: 1.05rem; }
.result-metric-label { font-weight: 400; font-size: .78rem; }
.result-chart { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--border); background: transparent; box-shadow: none; }
.result-chart h3 { font-size: .95rem; font-weight: 600; color: var(--text); }
.result-assumptions { font-size: .8rem; border-left: 2px solid var(--border); padding-left: .75rem; }
.result-guidance { margin-top: 1rem; border: 0; border-top: 1px solid var(--border); border-radius: 0; background: none; padding: 1rem 0 0; }
.result-guidance h3 { font-size: .85rem; font-weight: 600; }
.result-guidance li { font-size: .8rem; font-weight: 400; }
.scenario-tools { font-size: .85rem; }
.scenario-tools summary { font-weight: 500; }
.guide-navigation { gap: .75rem 1.25rem; margin-top: 1.5rem; padding-block: 1rem; font-size: .85rem; border-bottom: 1px solid var(--border); }
.calculator-reading-layout { display: grid; grid-template-columns: minmax(0,1.75fr) minmax(260px,1fr); align-items: start; gap: 1.25rem; margin-top: 1.5rem; }
.calculator-guide { min-width: 0; }
.calculator-related { min-width: 0; position: sticky; top: 96px; }
.calculator-related .related-tools { margin-top: 0; }
.calculator-related .compact-grid { grid-template-columns: 1fr; }
.calculator-related .tool-card { min-height: 100px; }
.calculator-related .tool-card > a { grid-template-columns: 32px minmax(0,1fr); gap: .35rem .65rem; padding: 1rem 2.5rem 1rem .75rem; }
.calculator-related .tool-card .tool-card-icon { width: 32px; height: 32px; background: none; }
.calculator-related .tool-card .tool-card-icon .ui-icon { width: 24px; height: 24px; }
.calculator-related .tool-card p { font-size: .8rem; }
.calculator-related .tool-card h3 { font-size: .85rem; }
.calculator-related .tool-card .favorite-toggle { top: .1rem; right: 0; }
.markdown-content,.faq-section,.related-tools,.related-guides { padding: 1.5rem; background: var(--surface); border-radius: 12px; box-shadow: none; }
.markdown-content p,.markdown-content li { font-size: .95rem; line-height: 1.75; color: var(--muted); }
.markdown-content h2 { font-size: 1.3rem; padding-top: .25rem; scroll-margin-top: 100px; }
.markdown-content h3 { font-size: 1.05rem; }
.markdown-content a,.methodology-link a,.result-detail a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.faq-section h2,.related-tools h2,.related-guides h2 { font-size: 1.2rem; }
.faq-section summary { padding-block: .9rem; font-weight: 500; min-height: 44px; }
.table-wrap { max-width: 100%; overflow-x: auto; }
.table-wrap th,.table-wrap td { font-weight: 400; font-size: .85rem; }
.table-wrap th { font-weight: 600; background: var(--surface-strong); }
/* Reading, policies and guides inherit the same restrained surfaces and type scale. */
.page-intro,.page-hero,.blog-hero,.blog-archive-hero { padding: 1.5rem 0; background: none; border: 0; box-shadow: none; margin-bottom: 1.5rem; }
.page-intro h1,.page-hero h1,.blog-hero h1,.blog-archive-hero h1 { font-size: clamp(1.85rem,3.2vw,2.7rem); line-height: 1.2; max-width: 30ch; }
.page-intro p,.page-hero p,.blog-hero p { font-size: 1rem; font-weight: 400; max-width: 75ch; }
.blog-article-header { grid-template-columns: minmax(0,1.5fr) minmax(240px,1fr); align-items: center; margin-bottom: 1.5rem; }
.blog-article-copy { padding: 1rem 1rem 1rem 0; background: none; border: 0; box-shadow: none; }
.blog-article-copy::before { display: none; }
.blog-article-copy h1 { max-width: 28ch; font-size: clamp(1.8rem,3.2vw,2.6rem); line-height: 1.18; }
.blog-article-copy > p { font-size: .95rem; }
.blog-article-image { min-height: 0; aspect-ratio: 16/10; max-height: 280px; box-shadow: none; }
.blog-card,.blog-side-card,.blog-cta,.benefit-band { background: var(--surface); box-shadow: none; border: 1px solid var(--border); border-radius: 12px; }
.blog-card-body strong { font-weight: 600; font-size: 1.15rem; }
.blog-card-kicker,.blog-card-meta,.blog-meta { font-weight: 500; }
.featured-post a { grid-template-columns: minmax(200px,.85fr) minmax(0,1.15fr); }
.featured-post-media { aspect-ratio: 16/10; }
.featured-post-body { justify-content: center; padding: 1.5rem; }
.featured-post-body h2 { font-size: clamp(1.3rem,2.2vw,2rem); }
.benefit-band { padding: 1.5rem; margin-block: 2rem; }
.benefit-band h2 { font-size: 1.5rem; }
.benefit-list h3 { font-size: .95rem; font-weight: 600; }
.benefit-list p { font-size: .85rem; font-weight: 400; }
.site-footer { background: var(--surface); border-top: 1px solid var(--border); margin-top: 0; }
.footer-grid { padding-block: 2.5rem; gap: 2rem; }
.footer-brand .brand-logo { width: 160px; }
.footer-grid h2 { font-size: .9rem; font-weight: 600; }
.footer-grid p,.footer-grid li,.footer-bottom { font-size: .8rem; font-weight: 400; color: var(--muted); }
.footer-bottom { border-top: 1px solid var(--border); padding-block: 1.25rem; }
/* Screen sizes affect layout rather than hiding product content. */
@media (max-width: 1279px) {
  .site-design .site-header .site-nav { gap: .8rem; margin-left: .2rem; }
  .site-design .site-header .site-nav a[href="/popular"] { display: none; }
  .site-design .site-header .brand-logo { width: 155px; }
  .site-design .site-header:not(.app-header) .header-search { max-width: 170px; }
}
@media (max-width: 1099px) {
  .nav-shell,.page-shell,.footer-grid,.footer-bottom,.calculator-app { width: calc(100% - 2rem); }
  .site-design .site-header:not(.app-header) .nav-shell,.site-design .site-header.app-header .nav-shell { display: grid; grid-template-columns: minmax(0,1fr) 44px 44px 44px; gap: .45rem; min-height: 64px; padding-block: .5rem; grid-template-areas: none; }
  .site-design .site-header .brand { grid-area: auto; grid-column: 1; grid-row: 1; }
  .site-design .site-header .brand-logo { width: clamp(125px,20vw,155px); }
  .site-design .site-header .header-search-toggle { display: grid; place-items: center; grid-column: 2; grid-row: 1; width: 44px; height: 44px; border: 0; color: var(--text); background: none; padding: 0; }
  .site-design .site-header .theme-toggle { grid-area: auto; grid-column: 3; grid-row: 1; width: 44px; min-width: 44px; height: 44px; border: 0; background: none; }
  .site-design .site-header .theme-option { color: var(--text); background: none; }
  [data-theme="light"] .site-design .site-header .theme-option-light,[data-theme="dark"] .site-design .site-header .theme-option-dark { display: none; }
  .site-design .site-header .menu-toggle { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; grid-area: auto; grid-column: 4; grid-row: 1; width: 44px; height: 44px; border: 0; background: none; padding: 10px; }
  .site-design .site-header .menu-toggle span { background: var(--text); width: 21px; height: 2px; }
  .site-design .site-header .site-nav { display: none; grid-area: auto; grid-column: 1/-1; grid-row: 3; padding: .75rem 0; margin: 0; border-top: 1px solid var(--border); flex-wrap: wrap; gap: .5rem 1.2rem; }
  .site-design .site-header .site-nav a[href="/popular"],.site-design .site-header .mobile-favorites-link { display: block; }
  .site-design .site-header .locale-switcher { display: none; grid-area: auto; grid-column: 1/-1; grid-row: 4; width: 190px; padding-bottom: .5rem; }
  .site-design .site-header:not(.app-header) .header-search { display: none; grid-area: auto; grid-column: 1/-1; grid-row: 2; max-width: none; width: 100%; margin: .3rem 0; }
  .site-design .site-header .header-search input { min-height: 44px; font-size: 1rem; }
  .site-design .site-header .favorites-action { display: none; }
  .site-design.nav-open .site-header .site-nav { display: flex; }
  .site-design.nav-open .site-header .locale-switcher { display: block; }
  .site-design.nav-open .site-header:not(.app-header) .header-search,.site-design.search-open .site-header:not(.app-header) .header-search { display: block; }
  .site-design .site-header.app-header .nav-shell { grid-template-columns: minmax(0,1fr) 44px 44px; }
  .site-design .site-header.app-header .menu-toggle { grid-column: 3; }
  .site-design .site-header.app-header .theme-toggle { grid-column: 2; }
  .site-design .site-header.app-header .site-nav { grid-row: 2; }
  .site-design .site-header.app-header .locale-switcher { width: 190px; flex-basis: 100%; }
  .home-page .hero--calculator { width: calc(100% - 2rem); gap: 2rem; }
  .category-layout { grid-template-columns: 170px minmax(0,1fr); gap: 1.25rem; }
  .topic-sidebar { top: 85px; padding-right: .5rem; }
  .card-grid,.compact-grid,.category-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .home-page .category-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
  .calculator-panels > .content-card { padding: 1.15rem; }
  .calculator-form:not(.calculator-form--sectioned):not(.calculator-form--keypad) { grid-template-columns: minmax(0,1fr); }
  .calculator-form .form-row { grid-column: 1/-1; }
  .calculator-reading-layout { grid-template-columns: minmax(0,1.6fr) minmax(230px,1fr); }
}
@media (max-width: 767px) {
  .home-page .hero--calculator { grid-template-columns: 1fr; gap: 1.75rem; padding: 1.5rem 0 2rem; }
  .hero--calculator h1 { font-size: clamp(2.1rem,6vw,2.8rem); }
  .hero--calculator .hero-copy { font-size: 1rem; margin-bottom: 1.2rem; }
  .hero--calculator .quick-links { gap: .45rem; }
  .hero--calculator .quick-links a { font-size: .8rem; padding: .5rem .65rem; }
  .hero-standard-calculator { justify-self: stretch; max-width: none; padding: .9rem; }
  .hero-standard-calculator-keys button { min-height: 48px; }
  .hero-standard-calculator-display { min-height: 66px; }
  .home-page .discovery-search input { padding-left: .35rem; font-size: .9rem; }
  .home-page .search-submit { padding: .6rem .8rem; }
  .category-layout { display: flex; flex-direction: column; gap: 1.25rem; }
  .topic-sidebar { width: 100%; border: 1px solid var(--border); padding: 0; border-radius: 8px; position: static; max-height: none; overflow: visible; background: var(--surface); }
  .topic-sidebar summary { display: block; padding: .7rem 1rem; cursor: pointer; list-style: disclosure-closed; }
  .topic-sidebar nav { grid-template-columns: repeat(2,minmax(0,1fr)); padding: .5rem; border-top: 1px solid var(--border); }
  .category-detail-page .main-column { width: 100%; }
  .category-detail-page .category-tool-grid { grid-template-columns: minmax(0,1fr); }
  .home-page .category-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .calculator-titlebar > div:not(.calculator-actions) { flex-basis: 100%; }
  .calculator-titlebar h1 { font-size: 1.9rem; }
  .calculator-titlebar p { font-size: .95rem; }
  .calculator-panels { grid-template-columns: minmax(0,1fr); gap: 1rem; }
  .calculator-panels > .content-card { padding: 1.25rem; }
  .calculator-form:not(.calculator-form--sectioned):not(.calculator-form--keypad) { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .calculator-form .form-actions > .button-cta { max-width: none; }
  .calculator-form button[type="submit"]:not(.form-submit-hidden) { width: auto; }
  .result-card > [data-result-value] { font-size: clamp(1.8rem,8vw,2.65rem); }
  .calculator-reading-layout { grid-template-columns: minmax(0,1fr); }
  .calculator-related { position: static; }
  .markdown-content,.faq-section,.related-tools,.related-guides { padding: 1.25rem; }
  .guide-navigation { gap: .6rem 1rem; }
  .category-request-bar { gap: .5rem; align-items: flex-start; }
  .category-request-bar > span:not(.category-request-icon) { display: none; }
  .blog-article-header { grid-template-columns: minmax(0,1fr); }
  .blog-article-copy { padding: 0; }
  .blog-article-image { max-height: 220px; width: 100%; }
  .featured-post a { grid-template-columns: minmax(0,1fr); }
  .featured-post-media { max-height: 240px; }
  .blog-feed-layout,.blog-article-layout { grid-template-columns: minmax(0,1fr); }
  .footer-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1.5rem; }
  .footer-grid > div:first-child { grid-column: 1/-1; }
}
@media (max-width: 539px) {
  .card-grid,.compact-grid,.category-grid { grid-template-columns: minmax(0,1fr); }
  .page-shell { padding-top: 1.2rem; }
  .section-heading { align-items: flex-start; }
  .section-heading > a { font-size: .8rem; }
  .tool-card { min-height: 116px; }
  .category-card-main { min-height: 124px; }
  .tool-card h3 { font-size: .95rem; }
  .tool-card p { font-size: .85rem; }
  .calculator-form:not(.calculator-form--sectioned):not(.calculator-form--keypad) { grid-template-columns: minmax(0,1fr); }
  .calculator-panels > .content-card { padding: 1rem; }
  .calculator-actions .icon-button,.calculator-actions .favorite-toggle { padding: .5rem .7rem; }
  .category-card--compact .category-card-main { display: flex; flex-direction: column; align-items: flex-start; gap: .4rem; min-height: 116px; padding: .8rem 1.7rem .8rem .8rem; }
  .category-card--compact h3 { font-size: .8rem; }
  .category-card--compact .category-card-arrow { top: auto; bottom: .8rem; }
  .listing-toolbar { gap: .7rem; }
  .listing-sort { width: 100%; justify-content: space-between; }
  .search-results { width: 100%; max-height: 45vh; }
  .calculator-form .form-row { grid-template-columns: minmax(0,1fr); }
}
/* CAL-48: size the workspace and its controls by the space they actually have. */
@media (max-width: 1099px) {
  .calculator-panels { grid-template-columns: minmax(0,1fr); }
}
.calculator-panels > .input-panel,
.calculator-panels > .results-panel { container-type: inline-size; }
.calculator-form:not(.calculator-form--keypad),
.calculator-form .form-section-grid,
.calculator-form .form-row { row-gap: .4rem; }
.calculator-form .form-section-grid,
.calculator-form .form-row { grid-template-columns: repeat(2,minmax(0,1fr)); }
.calculator-form .form-row--columns-1 { grid-template-columns: minmax(0,1fr); }
.calculator-form .input-group {
  grid-row: span 3;
  grid-template-rows: subgrid;
  row-gap: .4rem;
  min-width: 0;
  padding-bottom: .75rem;
}
.calculator-form .form-section-grid > .input-group,
.calculator-form .form-row > .input-group { grid-column: auto; }
.calculator-form .input-group--width-full,
.calculator-form .input-group-wide,
.calculator-form .form-section-grid > .input-group--width-full,
.calculator-form .form-section-grid > .input-group-wide,
.calculator-form .input-group--control-segmented,
.calculator-form .form-section-grid > .input-group--control-segmented,
.calculator-form .form-row > .input-group--control-segmented,
.calculator-form .input-group:has(select),
.calculator-form .form-section-grid > .input-group:has(select),
.calculator-form .form-row > .input-group:has(select) { grid-column: 1 / -1; }
.calculator-form .input-label-row { align-self: end; min-width: 0; }
.calculator-form .input-label-row label { min-width: 0; overflow-wrap: anywhere; }
.calculator-form .input-group > :nth-child(2) { align-self: start; min-width: 0; }
.calculator-form .input-group > small { align-self: start; margin: 0; }
.calculator-form .form-section[hidden],
.calculator-form .form-row[hidden],
.calculator-form .input-group[hidden] { display: none; }
.calculator-form .segmented-control {
  display: grid;
  grid-auto-flow: row;
  grid-auto-columns: auto;
  grid-template-columns: repeat(auto-fit,minmax(min(100%,8rem),1fr));
  width: 100%;
  max-width: 100%;
  overflow: visible;
  border-radius: 10px;
}
.calculator-form .segmented-option { display: grid; width: auto; max-width: none; align-self: stretch; justify-content: stretch; align-content: stretch; gap: 0; }
.calculator-form .segmented-option span {
  min-width: 0;
  min-height: 44px;
  height: 100%;
  white-space: normal;
  overflow-wrap: anywhere;
  border-radius: 8px;
  padding: .6rem .75rem;
  font-size: .85rem;
}
.calculator-form .segmented-option input {
  inset: 0;
  width: 1px;
  height: 1px;
  min-height: 0;
  min-width: 0;
  padding: 0;
  margin: 0;
  clip-path: inset(50%);
}
.calculator-form .checkbox-choice,
.calculator-form .toggle-control { width: 100%; max-width: none; }
.calculator-form .checkbox-choice span,
.calculator-form .toggle-control strong { min-width: 0; overflow-wrap: anywhere; }
.calculator-form .input-group--has-prefix input { padding-left: var(--input-prefix-space,3.1rem); }
.calculator-form .input-group--has-suffix input { padding-right: var(--input-suffix-space,3.1rem); }
.calculator-form .select-shell::after { top: 25px; }
.input-help-popover::before { left: calc(var(--popover-arrow-left,3.56rem) - .36rem); }
.select-value { display: block; margin-top: .4rem; color: var(--muted); font-size: .8rem; line-height: 1.4; overflow-wrap: anywhere; }
.select-value[hidden] { display: none; }
/* Unit names get a full line and the swap action stays between the two choices. */
.calculator-form .form-row--unit-conversion-units,
.calculator-form .form-row--conversion-units { grid-template-columns: minmax(0,1fr); }
.conversion-swap-control { grid-column: 1 / -1; justify-self: center; align-self: center; }
.result-card .result-summary {
  grid-template-columns: repeat(auto-fit,minmax(min(100%,16rem),1fr));
  gap: .6rem;
  border: 0;
  background: none;
  overflow: visible;
  box-shadow: none;
}
.result-card .result-summary-item,
.result-card .result-summary .result-summary-item:nth-child(n) {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-strong);
  padding: .8rem;
}
.result-card .result-summary-value,
.result-card .result-metric strong { overflow-wrap: normal; word-break: normal; font-size: clamp(.85rem,3cqi,1.05rem); }
.result-card .result-metrics { grid-template-columns: repeat(auto-fit,minmax(min(100%,16rem),1fr)); }
@container (min-width: 500px) {
  .calculator-form .form-row--columns-3 { grid-template-columns: repeat(3,minmax(0,1fr)); }
}
@container (min-width: 660px) {
  .calculator-form .form-row--columns-4 { grid-template-columns: repeat(4,minmax(0,1fr)); }
}
@container (max-width: 359px) {
  .calculator-form:not(.calculator-form--keypad),
  .calculator-form .form-section-grid,
  .calculator-form .form-row { grid-template-columns: minmax(0,1fr); }
  .calculator-form .form-section-grid > .input-group,
  .calculator-form .form-row > .input-group { grid-column: 1 / -1; }
}

/* Standalone tools use the same visual language without full-page chrome. */
.calculator-app--standalone { width: min(1120px,calc(100% - 2rem)); margin-inline: auto; padding-block: 1rem; }
.calculator-app--standalone .calculator-titlebar { margin-bottom: 1rem; }
.calculator-app--standalone .calculator-titlebar h1 { font-size: clamp(1.5rem,3vw,2rem); }
.calculator-app--standalone .calculator-panels { gap: 1rem; }
.calculator-app--standalone .panel-heading { margin-bottom: 1rem; }
.calculator-app--standalone .panel-heading::before { display: none; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *,*::before,*::after { animation: none !important; transition: none !important; } }
@media print {
  .calculator-reading-layout,.topic-sidebar { display: none !important; }
  .result-card > .result-label,.result-card > [data-result-value] { background: #fff !important; color: #000 !important; padding-inline: 0; }
  .result-card .result-unit { color: #333; }
}
/* Result charts remain compact and readable in either theme. */
.result-chart canvas { display: block; width: 100%; height: 220px; }
.result-chart-heading strong { font-size: .95rem; font-weight: 600; }
.result-chart-heading span,.result-chart-legend { font-size: .8rem; font-weight: 400; }
.result-chart-heading [data-chart-type] { padding: .4rem .6rem; font-size: .75rem; border-radius: 6px; box-shadow: none; }
.result-chart-legend { margin-block: .7rem; }
.input-group .input-label,.input-group label { font-weight: 500; }
.input-group .input-info-popover { font-weight: 400; }
@media (max-width: 539px) { .result-chart canvas { height: 200px; } }
.ui-icon-mask { display: inline-block; flex: 0 0 auto; width: 24px; height: 24px; background: currentColor; mask: var(--icon) center / contain no-repeat; vertical-align: middle; }
.favorite-toggle-icon .ui-icon-mask { width: 20px; height: 20px; }
.tool-card-arrow .ui-icon-mask { width: 20px; height: 20px; }
/* Reset only legacy layout properties that the new reusable cards replace. */
.home-page .hero-content { display: block; }
.home-page .hero-content > .eyebrow { margin: 0; }
.category-hero { display: block; min-height: 0; }
.category-card-main { height: auto; min-height: 124px; }
.category-examples a { display: inline; height: auto; min-height: 0; padding: 0; margin: 0; line-height: 1.5; }
.category-examples a::before,.category-examples a::after,.category-card-main::after,.tool-card > a::after { display: none; content: none; }
.category-grid { margin-top: 0; }
/* The full arithmetic tool shares the homepage keypad's theme tokens. */
.standard-calculator {
  --standard-accent: var(--primary);
  --standard-operator: #2563eb;
  --standard-utility-bg: var(--primary-soft);
  --standard-key-border: var(--border);
  --standard-key-bg: var(--surface);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: none;
  border-radius: 10px;
}
.standard-calculator-display { background: var(--calculator-input-bg); color: var(--text); border: 1px solid var(--border); box-shadow: none; font-weight: 600; }
.standard-calculator-key { background: var(--surface); color: var(--text); border-color: var(--border); border-radius: 8px; box-shadow: none; font-weight: 500; min-height: 48px; transition: border-color 120ms ease; }
.standard-calculator-key:hover,.standard-calculator-key:active { background: var(--surface-strong); border-color: var(--primary); box-shadow: none; transform: none; }
.standard-calculator-key--utility { background: var(--primary-soft); color: var(--primary); }
.standard-calculator-key--operator,.standard-calculator-key--equals { background: #2563eb; border-color: #2563eb; color: #fff; }
.standard-calculator-key--operator:hover,.standard-calculator-key--equals:hover { background: #1d4ed8; border-color: #1d4ed8; color: #fff; }
.button,.icon-button,.favorite-toggle { transition: border-color 120ms ease; }
.categories-showcase { display: block; }