/* Light is the base palette; the dark block below only swaps these tokens. */
:root {
  color-scheme: light dark;
  --bg: #f6f7f9;
  --paper: #fff;
  --paper-soft: #fafafa;
  --ink: #263448;
  --body: #454d61;
  --muted: #617083;
  --faint: #767d87;
  --glyph: #565e6c;
  --placeholder: #707580;
  --line: #dce2e9;
  --line-soft: #e9edf2;
  --kbd-ink: #656973;
  --kbd-line: #d5d7dc;
  --field-line: #9ea3ad;
  --search-line: #adbcca;
  --secondary-line: #b6bac2;
  --accent: #355e88;
  --accent-hover: #264a70;
  --on-accent: #fff;
  --icon: #536e88;
  --link-soft: #44556a;
  --tint: #edf2f7;
  --tint-line: #bdcddd;
  --tint-rule: #d4d9e4;
  --row-bg: #f7f7f8;
  --th-bg: #e9ecf3;
  --hover-bg: #fdfefe;
  --hover-line: #8babc7;
  --selected-bg: #f0f3fb;
  --danger: #b72b26;
  --danger-bg: #fff0eb;
  --danger-line: #b63720;
  --danger-ink: #8c281a;
  --warn-bg: #fff9ed;
  --warn-line: #a87923;
  --warn-ink: #604b28;
  --backdrop: #171c2980;
  --shadow: #25364c06;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
  font-synthesis: none;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12171f;
    --paper: #19202b;
    --paper-soft: #1e2632;
    --ink: #e7edf5;
    --body: #c6cfdb;
    --muted: #a3b1c2;
    --faint: #93a0b0;
    --glyph: #a3b1c2;
    --placeholder: #9aa7b6;
    --line: #2d3848;
    --line-soft: #2a3341;
    --kbd-ink: #b3bece;
    --kbd-line: #3a4655;
    --field-line: #647285;
    --search-line: #55677c;
    --secondary-line: #4c5766;
    --accent: #86b5e4;
    --accent-hover: #a5cbf0;
    --on-accent: #0e141c;
    --icon: #a2bfdb;
    --link-soft: #ccd7e4;
    --tint: #1b2632;
    --tint-line: #35485e;
    --tint-rule: #2f3d4f;
    --row-bg: #1d2531;
    --th-bg: #232e3c;
    --hover-bg: #1f2834;
    --hover-line: #5a7590;
    --selected-bg: #243448;
    --danger: #ff9a92;
    --danger-bg: #33201d;
    --danger-line: #dc5b4f;
    --danger-ink: #ffb9b1;
    --warn-bg: #2f2716;
    --warn-line: #cb9e48;
    --warn-ink: #f2ddaf;
    --backdrop: #04070ccc;
    --shadow: #00000059;
  }
}
* { box-sizing: border-box; }
body { margin: 0; font-size: 15px; line-height: 1.5; background: var(--bg); color: var(--ink); }
a { color: inherit; text-underline-offset: 3px; }
button, input, select, textarea { font: inherit; }
button, a, input, select, textarea { touch-action: manipulation; }
button { cursor: pointer; }
button:disabled { opacity: .6; cursor: wait; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
[hidden] { display: none !important; }
.container { width: min(1180px, calc(100% - 64px)); margin: auto; }
.skip-link { position: absolute; top: -80px; left: 20px; z-index: 30; background: var(--paper); color: var(--ink); padding: 12px; }
.skip-link:focus { top: 10px; }
.site-header { background: var(--paper); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; gap: 34px; min-height: 76px; }
.brand { display: inline-flex; gap: 9px; align-items: center; font-size: 19px; font-weight: 700; text-decoration: none; letter-spacing: -.65px; white-space: nowrap; }
.brand-mark { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 6px; background: var(--ink); color: var(--paper); font: 700 25px Georgia, serif; padding-bottom: 3px; }
.main-nav { display: flex; gap: 26px; margin-left: auto; font-size: 13px; }
.main-nav a { text-decoration: none; }
.main-nav a:hover { color: var(--accent); text-decoration: underline; }
.search-trigger { display: flex; align-items: center; gap: 20px; border: 1px solid var(--line); background: var(--paper-soft); border-radius: 3px; padding: 6px 10px; color: var(--muted); font-size: 12px; }
kbd { font: 11px ui-monospace, monospace; color: var(--kbd-ink); border: 1px solid var(--kbd-line); padding: 1px 4px; border-radius: 2px; background: var(--paper); }
.hero { padding: 49px 0 38px; max-width: 790px; margin: auto; text-align: center; }
.hero-description { color: var(--muted); font-size: 15px; margin: 0 0 25px; line-height: 1.7; }
.hero h1 { font-size: clamp(29px, 3vw, 40px); font-weight: 650; letter-spacing: -1.2px; line-height: 1.25; margin: 0 0 12px; }
.hero-search { max-width: 700px; margin: auto; }
.search-box { display: flex; gap: 13px; align-items: center; border: 1px solid var(--search-line); border-radius: 6px; padding: 13px 15px; background: var(--paper); }
.hero .search-box { border: 1px solid var(--search-line); border-radius: 8px; padding: 17px 19px; box-shadow: 0 3px 8px var(--shadow); text-align: left; }
.search-box:focus-within { outline: 2px solid var(--accent); outline-offset: 2px; }
.search-box svg { width: 21px; height: 21px; stroke: var(--glyph); flex: none; }
.search-box input { border: 0; outline: 0; width: 100%; min-width: 0; background: none; color: var(--ink); font-size: 15px; }
.search-box input::placeholder { color: var(--placeholder); opacity: 1; }
.search-hints { font-size: 12px; color: var(--muted); margin: 10px 0 0; }
.search-hints button { border: 0; background: none; padding: 2px 6px; color: var(--body); text-decoration: underline; text-underline-offset: 3px; }
.directory-layout { margin-bottom: 50px; }
.directory-sidebar { padding-right: 22px; border-right: 1px solid var(--line); }
.directory-sidebar h2 { font-size: 12px; font-weight: 700; margin: 0 0 15px; color: var(--muted); }
.directory-sidebar nav { display: grid; gap: 1px; }
.directory-sidebar nav a { display: flex; align-items: center; justify-content: space-between; gap: 6px; padding: 8px 0; font-size: 13px; text-decoration: none; }
.directory-sidebar nav a:hover { color: var(--accent); }
.directory-sidebar nav small { font: 10px ui-monospace, monospace; color: var(--faint); }
.directory-all { display: inline-block; font-size: 12px; margin-top: 20px; color: var(--accent); text-decoration: none; }
.directory-all:hover { text-decoration: underline; }
.section { margin-bottom: 35px; }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 15px; }
.section-heading h2 { font-size: 21px; letter-spacing: -.45px; margin: 0; font-weight: 650; }
.section-heading a { font-size: 12px; color: var(--muted); }
.section-meta { font-size: 12px; color: var(--muted); }
.popular-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 12px; }
.popular-grid .tool-card { background: var(--paper); border: 1px solid var(--line); border-radius: 7px; padding: 17px 19px; }
.popular-grid .tool-card:hover { border-color: var(--hover-line); background: var(--hover-bg); }
.popular-grid .tool-icon { display: grid; place-items: center; width: 31px; height: 34px; color: var(--icon); font-size: 23px; flex: none; margin-right: 2px; }
.tool-card { display: flex; gap: 12px; align-items: center; padding: 13px 0; text-decoration: none; border-bottom: 1px solid var(--line); min-width: 0; }
.tool-card:hover h3 { color: var(--accent); text-decoration: underline; }
.tool-icon { display: none; }
.tool-card-text { min-width: 0; }
.tool-card h3 { font-size: 15px; line-height: 1.35; font-weight: 600; margin: 0; }
.tool-card p { color: var(--muted); font-size: 12px; margin: 4px 0 0; line-height: 1.5; }
.card-arrow { margin-left: auto; font-size: 14px; color: var(--faint); }
.directory-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.directory-group { min-width: 0; scroll-margin-top: 22px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); padding: 21px 24px; }
.directory-group h3 { margin: 0 0 12px; padding-bottom: 12px; border-bottom: 1px solid var(--line-soft); font-size: 16px; font-weight: 650; }
.directory-group h3 a { text-decoration: none; }
.directory-group ul { list-style: none; margin: 0; padding: 0; }
.directory-group li a { display: block; padding: 7px 0; font-size: 14px; color: var(--link-soft); text-decoration: none; line-height: 1.35; }
.directory-group li a:hover { color: var(--accent); text-decoration: underline; }
.directory-more { display: inline-block; margin-top: 16px; font-size: 12px; color: var(--accent); text-decoration: none; }
.directory-more:hover { color: var(--accent); }
.recent-section { border-top: 1px solid var(--line); padding-top: 22px; margin-bottom: 0; }
.empty-state { font-size: 13px; color: var(--muted); margin: 5px 0 15px; grid-column: 1 / -1; }
.site-footer { background: var(--paper); border-top: 1px solid var(--line); padding: 25px 0; font-size: 12px; color: var(--muted); }
.footer-inner { display: flex; justify-content: space-between; gap: 25px; }
.site-footer .brand { font-size: 15px; color: var(--ink); }
.site-footer .brand-mark { width: 27px; height: 27px; font-size: 21px; }
.site-footer p { font-size: 11px; margin: 4px 0 0; }
.footer-links { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; }
.footer-links a { text-decoration: none; }
.footer-links a:hover { text-decoration: underline; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0; font-size: 11px; color: var(--muted); }
.breadcrumbs a { text-decoration: none; }
.page-heading { margin: 32px 0 34px; }
.page-heading h1 { font-size: 32px; letter-spacing: -1px; line-height: 1.2; font-weight: 600; margin: 0 0 12px; }
.page-heading p { font-size: 14px; color: var(--muted); max-width: 730px; margin: 0; }
.calculator-layout { display: grid; grid-template-columns: minmax(0,750px) minmax(0,240px); justify-content: space-between; gap: 55px; align-items: start; padding-bottom: 55px; }
.calculator-card { background: var(--paper); border: 1px solid var(--line); border-radius: 9px; padding: 25px; }
.card-heading { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 23px; }
.card-heading h2 { margin: 0; font-size: 16px; font-weight: 600; }
.card-heading span { color: var(--muted); font-size: 11px; }
.form-fields { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 21px 24px; }
.field { display: flex; flex-direction: column; min-width: 0; margin: 0; padding: 0; border: 0; }
.field:has(.dynamic-rows), .field:has(.radio-group) { grid-column: 1 / -1; }
.field label, .field legend { display: block; font-size: 13px; font-weight: 500; margin-bottom: 7px; }
.field input:not([type=radio]):not([type=checkbox]):not([type=range]), .field select { width: 100%; border: 1px solid var(--field-line); border-radius: 2px; padding: 10px 11px; min-height: 44px; color: var(--ink); background: var(--paper); }
.field input[aria-invalid=true] { border: 2px solid var(--danger) !important; }
.field-help { font-size: 11px; color: var(--muted); line-height: 1.5; margin-top: 6px; }
.radio-group { display: flex; gap: 16px; flex-wrap: wrap; }
.radio-option { display: flex !important; align-items: center; gap: 7px; }
.field input[type=checkbox] { width: 20px; height: 20px; align-self: flex-start; }
input[type=checkbox], input[type=radio], input[type=range] { accent-color: var(--accent); }
.dynamic-rows { display: grid; gap: 12px; }
.dynamic-row { display: flex; flex-wrap: wrap; align-items: end; gap: 10px; background: var(--row-bg); padding: 12px; border-bottom: 1px solid var(--line); }
.dynamic-row > .field { flex: 1; min-width: 100px; }
.icon-button { width: 36px; min-height: 40px; border: 1px solid var(--line); border-radius: 2px; background: var(--paper); color: var(--muted); font-size: 22px; }
.dynamic-rows + .button { align-self: start; margin-top: 12px; }
.button { display: inline-flex; justify-content: center; align-items: center; border: 1px solid transparent; border-radius: 5px; padding: 11px 24px; font-size: 14px; font-weight: 600; text-decoration: none; }
.button.primary { background: var(--accent); color: var(--on-accent); }
.button.primary:hover { background: var(--accent-hover); }
.button.secondary { background: var(--paper); border-color: var(--secondary-line); color: var(--ink); }
.button.small { font-size: 12px; padding: 7px 12px; }
.form-actions { display: flex; gap: 12px; margin-top: 25px; }
.error-state { margin-top: 20px; background: var(--danger-bg); border-left: 3px solid var(--danger-line); padding: 13px; color: var(--danger-ink); font-size: 13px; }
.result-card { margin-top: 22px; background: var(--tint); border: 1px solid var(--tint-line); border-radius: 8px; padding: 24px; }
.eyebrow { font-size: 11px; font-weight: 600; color: var(--muted); letter-spacing: .6px; margin: 0 0 15px; }
.result-values { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 20px; margin: 0; }
.result-values div:first-child { grid-column: 1 / -1; padding-bottom: 18px; border-bottom: 1px solid var(--tint-rule); }
.result-values dt { font-size: 12px; color: var(--muted); }
.result-values dd { font-size: 24px; margin: 4px 0 0; line-height: 1.3; overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }
.result-values div:first-child dd { font-size: 34px; font-weight: 600; letter-spacing: -.8px; }
.result-explanation { font-size: 13px; margin-top: 22px; }
.notice { background: var(--warn-bg); border-left: 2px solid var(--warn-line); padding: 11px 14px; font-size: 12px; color: var(--warn-ink); line-height: 1.6; }
.share-button { margin: 14px 0; }
.table-scroll { overflow: auto; max-height: 500px; margin-top: 20px; }
table { border-collapse: collapse; width: 100%; font-size: 12px; background: var(--paper); white-space: nowrap; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); }
th { background: var(--th-bg); position: sticky; top: 0; }
aside { min-width: 0; }
.aside-box { padding: 20px; background: var(--paper); border: 1px solid var(--line); border-radius: 8px; }
.aside-box h2 { font-size: 13px; font-weight: 600; margin: 0 0 10px; }
.related-list { display: grid; }
.related-list a { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 12px; text-decoration: none; }
.related-list a:hover { color: var(--accent); }
.info-section { padding: 27px 0; border-bottom: 1px solid var(--line); }
.info-section h2 { font-size: 18px; font-weight: 600; margin: 0 0 12px; }
.info-section p { font-size: 14px; line-height: 1.7; color: var(--body); white-space: pre-line; }
.page-heading .lead { font-size: 15px; line-height: 1.75; color: var(--body); max-width: 730px; margin: 14px 0 0; }
.faq-item { padding: 16px 0; border-bottom: 1px solid var(--line-soft); }
.faq-item:last-child { border-bottom: 0; padding-bottom: 0; }
.faq-item h3 { font-size: 15px; font-weight: 600; margin: 0 0 7px; }
.faq-item p { margin: 0; }
.source-meta { font-size: 12px; color: var(--muted); }
.source-meta a { overflow-wrap: anywhere; }
.catalog-controls { display: flex; gap: 16px; margin: 25px 0; }
.catalog-controls .search-box { flex: 1; }
.catalog-controls select { border: 1px solid var(--field-line); border-radius: 3px; padding: 12px; background: var(--paper); color: var(--ink); max-width: 250px; }
.catalog-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; margin-bottom: 55px; }
.catalog-grid .tool-card { align-items: start; padding: 20px; border: 1px solid var(--line); border-radius: 7px; background: var(--paper); }
.catalog-grid .tool-card h3 { font-weight: 600; }
.catalog-grid .tool-card p { font-size: 12px; }
.result-count { color: var(--muted); font-size: 12px; margin-bottom: 15px; }
.search-results-inline { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 0 25px; margin-top: 18px; }
.search-dialog { padding: 0; border: 1px solid var(--field-line); border-radius: 4px; width: min(660px,calc(100% - 28px)); max-height: 80vh; color: var(--ink); background: var(--paper); }
.search-dialog::backdrop { background: var(--backdrop); }
.dialog-heading { display: flex; justify-content: space-between; align-items: center; padding: 14px 20px; border-bottom: 1px solid var(--line); }
.dialog-heading h2 { font-size: 15px; margin: 0; font-weight: 600; }
.dialog-body { padding: 20px; }
.dialog-results { display: grid; margin-top: 18px; max-height: 45vh; overflow: auto; }
.dialog-results a[aria-selected=true] { background: var(--selected-bg); outline: 1px solid var(--accent); outline-offset: -1px; }
.dialog-results .tool-card { padding: 12px; }
.dialog-help { font-size: 11px; color: var(--muted); }
.editorial { max-width: 800px; padding-bottom: 60px; }
.editorial p { color: var(--muted); }
.editorial h2 { margin-top: 30px; font-size: 20px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
@media(max-width:1000px) {
  .header-inner { gap: 20px; }
  .main-nav { gap: 18px; }

  .directory-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }

  .calculator-layout { grid-template-columns: minmax(0,1fr) 215px; gap: 32px; }
  .catalog-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media(max-width:760px) {
  .container { width: calc(100% - 36px); }
  .header-inner { min-height: 65px; padding: 11px 0; gap: 10px; flex-wrap: wrap; }
  .brand { font-size: 18px; }
  .brand-mark { font-size: 23px; width: 30px; height: 30px; }
  .search-trigger { margin-left: auto; }
  .search-trigger kbd { display: none; }
  .main-nav { order: 3; width: 100%; justify-content: space-between; padding-top: 10px; border-top: 1px solid var(--line); margin-top: 4px; font-size: 12px; }
  .hero { padding: 32px 0 28px; }
  .hero h1 { font-size: 30px; max-width: 420px; margin: 0 auto 12px; letter-spacing: -.8px; }
  .hero-description { font-size: 13px; margin-bottom: 21px; }
  .hero .search-box { padding: 15px 12px; gap: 9px; }
  .hero .search-box input { font-size: 14px; }
  .hero .search-box kbd { display: none; }
  .search-hints { font-size: 11px; }
  .search-hints button { padding: 3px 5px; }
  .directory-layout { margin-bottom: 35px; }
  .directory-sidebar { display: none; }
  .section { margin-bottom: 28px; }
  .section-heading { gap: 10px; margin-bottom: 11px; }
  .section-heading h2 { font-size: 19px; }
  .section-meta { font-size: 11px; }
  .popular-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 9px; }
  .popular-grid .tool-card { padding: 13px 12px; }
  .popular-grid .tool-icon { display: none; }
  .tool-card { padding: 12px 0; gap: 7px; }
  .tool-card h3 { font-size: 14px; }
  .tool-card p { font-size: 11px; }
  .card-arrow { font-size: 12px; }
  .directory-grid { gap: 12px; }
  .directory-group { padding: 17px 15px; }
  .directory-group h3 { font-size: 15px; }
  .directory-group li a { font-size: 13px; padding: 7px 0; }
  .directory-more { font-size: 11px; }
  .footer-inner { display: block; }
  .footer-links { margin-top: 18px; gap: 16px; font-size: 11px; }
  .page-heading h1 { font-size: 28px; letter-spacing: -.7px; }
  .page-heading p { font-size: 13px; }
  .calculator-layout { display: block; }
  .calculator-layout aside { margin-top: 30px; }
  .calculator-card { padding: 20px; }
  .form-fields { gap: 18px; }
  .dynamic-row > .field:has(select) { flex-basis: 100%; }
  .result-card { padding: 20px; }
  .result-values dd { font-size: 21px; }
  .result-values div:first-child dd { font-size: 29px; }
  .catalog-controls { flex-direction: column; }
  .catalog-controls select { width: 100%; max-width: none; }
  .catalog-grid { gap: 12px; }
  .catalog-grid .tool-card h3 { font-size: 13px; }
  .catalog-grid .tool-card p { font-size: 11px; }
  .search-results-inline { grid-template-columns: 1fr; }
  .breadcrumbs { font-size: 10px; margin: 19px 0; }
}
@media(max-width:400px) {
  .form-fields { grid-template-columns: 1fr; }
  .result-values { grid-template-columns: 1fr; }
  .catalog-grid { grid-template-columns: 1fr; }
  .dynamic-row > .field { min-width: 90px; }
}
@media(prefers-reduced-motion:reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}
@media print {
  .site-header,.site-footer,.search-dialog,.form-actions,aside,.share-button { display: none !important; }
  .container { width: 100%; }
  .calculator-layout { display: block; }
  .calculator-card,.result-card { break-inside: avoid; }
}