:root {
  color-scheme: light;
  --bg: #f5f6fa;
  --surface: #fff;
  --soft: #eceef6;
  --text: #20263b;
  --muted: #5b647a;
  --border: #ccd2e2;
  --accent: #5343c2;
  --accent-soft: #ebe7ff;
  --shadow: 0 10px 35px #24234c0b;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #131722;
  --surface: #1c2231;
  --soft: #272f42;
  --text: #eef0fa;
  --muted: #b2bdd4;
  --border: #46516b;
  --accent: #b4a7ff;
  --accent-soft: #332d53;
  --shadow: 0 10px 35px #0002;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.5 system-ui, sans-serif; min-height: 100vh; display: flex; flex-direction: column; }
a { color: var(--accent); }
button, input, select { font: inherit; }
button, .button { cursor: pointer; }
button, .button, select, input[type="number"] { border: 1px solid var(--border); border-radius: 8px; padding: .4rem .75rem; min-height: 2.4rem; background: var(--surface); color: var(--text); }
button:hover, .button:hover { border-color: var(--accent); background: var(--accent-soft); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.primary { background: var(--accent); color: var(--bg); border-color: var(--accent); font-weight: 700; }
.primary:hover { background: var(--accent-soft); color: var(--text); }
.button { text-decoration: none; display: inline-block; }
.skip { position: absolute; top: -100px; left: 1rem; background: var(--surface); z-index: 10; }
.skip:focus { top: 1rem; }
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.header-inner { max-width: 1200px; margin: auto; display: flex; align-items: center; flex-wrap: wrap; gap: .5rem 1.5rem; padding: .3rem 1rem; }
.brand { display: flex; align-items: center; font-size: 1.15rem; font-weight: 800; letter-spacing: -.05em; color: var(--text); text-decoration: none; }
.brand::before { content: "n"; display: inline-grid; place-items: center; background: var(--accent); color: var(--bg); width: 28px; height: 28px; border-radius: 8px; margin-right: .5rem; }
.site-nav { display: flex; gap: .35rem; flex-wrap: wrap; }
.site-nav a { display: flex; align-items: center; gap: .5rem; padding: .4rem .75rem; color: var(--muted); text-decoration: none; border-radius: 8px; }
.site-nav a:hover { background: var(--soft); color: var(--text); }
.site-nav a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); font-weight: 700; }
.nav-icon { display: inline-grid; place-items: center; flex: 0 0 24px; height: 24px; font-size: 1.5rem; line-height: 1; }
.nav-icon svg, .tool-icon svg { display: block; }
.preferences { margin-left: auto; display: flex; flex-wrap: wrap; gap: .25rem .75rem; }
.preferences label { display: flex; align-items: center; gap: .4rem; font-size: .75rem; color: var(--muted); }
.preferences select { min-height: 0; padding: .2rem .4rem; max-width: 150px; font-size: .85rem; }
main { width: min(1140px, 100%); padding: 1rem 1.25rem 1.5rem; margin: 0 auto; flex: 1; }
h1, h2 { line-height: 1.2; letter-spacing: -.035em; }
h1 { font-size: clamp(.9rem, 1.8vw, 1.2rem); margin: 0 0 .25rem; }
h2 { font-size: 1.4rem; }
.lead, .note { color: var(--muted); }
.lead { margin: 0 0 .75rem; }
.hero { padding: 1.5rem 0 1rem; max-width: 750px; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.4rem); margin-bottom: .75rem; }
.home-content { margin-bottom: 1rem; overflow-wrap: anywhere; }
.eyebrow { font-size: .75rem; font-weight: 800; letter-spacing: .14em; color: var(--accent); }
.tool-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); gap: 1rem; margin: .5rem 0 1.5rem; }
.tool-card, .panel { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 1rem; box-shadow: var(--shadow); }
.tool-card { display: flex; align-items: flex-start; flex-direction: column; }
.tool-card p { color: var(--muted); flex: 1; }
.tool-card h2 { margin: .6rem 0 .25rem; }
.panel > :first-child { margin-top: 0; }
.panel > :not([hidden]):not(:has(~ :not([hidden]))) { margin-bottom: 0; }
.tool-icon { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 12px; background: var(--accent-soft); color: var(--accent); font-size: 1.5rem; font-weight: 700; }
.tabs, .actions { display: flex; flex-wrap: wrap; gap: .4rem; margin: .75rem 0; }
.tabs button[aria-pressed="true"] { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); font-weight: 700; }
.fields { display: flex; flex-wrap: wrap; gap: .5rem .75rem; align-items: end; }
.fields > label { display: grid; gap: .15rem; font-size: .9rem; font-weight: 600; }
.fields input[type="number"] { width: 110px; }
.checks { display: flex; flex-wrap: wrap; gap: .4rem 1rem; margin: .6rem 0; border: 0; padding: 0; }
.checks legend { font-weight: 600; margin-bottom: .25rem; }
input[type="checkbox"] { accent-color: var(--accent); width: 1.1rem; height: 1.1rem; vertical-align: middle; }
.error { color: #b12638; font-weight: 600; }
:root[data-theme="dark"] .error { color: #ff99a9; }
.site-footer { border-top: 1px solid var(--border); padding: .6rem 1rem; text-align: center; color: var(--muted); font-size: .8rem; }
.site-footer p { margin: .1rem; }
[hidden] { display: none !important; }
.visually-hidden { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.print-heading, .print-footer { display: none; }
@media (max-width: 650px) {
  .header-inner { gap: .4rem .75rem; padding: .4rem .75rem; }
  .preferences { margin-left: 0; width: 100%; }
  .site-nav { width: 100%; }
  .site-nav a { padding: .3rem .5rem; font-size: .9rem; }
  main { padding: .75rem .75rem 1rem; }
  .hero { padding-top: 1rem; }
  .tool-grid { grid-template-columns: 1fr; }
  .panel { padding: .75rem; }
}
@media screen and (min-width: 900px) and (hover: hover) {
  body { padding-left: 64px; }
  .site-nav {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 20;
    width: 64px;
    padding: 56px 8px 16px;
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 8px;
    overflow-x: hidden;
    overflow-y: auto;
    background: var(--surface);
    border-right: 1px solid var(--border);
  }
  .site-nav:not(.is-collapsed):hover, .site-nav:not(.is-collapsed):has(:focus-visible) { width: 240px; box-shadow: var(--shadow); }
  .site-nav.is-collapsed { transition: none; }
  .site-nav a { flex: 0 0 auto; gap: 14px; min-height: 44px; padding: 10px 12px; white-space: nowrap; }
  .nav-caption { opacity: 0; }
  .site-nav:not(.is-collapsed):hover .nav-caption, .site-nav:not(.is-collapsed):has(:focus-visible) .nav-caption { opacity: 1; }
  .site-nav.is-collapsed .nav-caption { transition: none; }
  .tool-grid { display: none; }
  .skip { left: 80px; z-index: 30; }
}
@media (prefers-reduced-motion: no-preference) {
  .tool-card { transition: transform .2s; }
  .tool-card:hover { transform: translateY(-3px); }
  .site-nav { transition: width .18s ease; }
  .nav-caption { transition: opacity .18s ease; }
}
@media print {
  :root { color-scheme: light; }
  body { display: block; min-height: 0; background: white; color: black; font: 12px/1.4 Arial, sans-serif; }
  .site-header, .site-footer, .skip, .no-print, main > h1, main > .lead, .tabs, .controls { display: none !important; }
  main { width: 100%; max-width: none; padding: 0; }
  .print-heading, .print-footer { display: block; }
  .print-heading h2 { margin: 0 0 1rem; text-align: center; }
  .print-heading p { display: flex; gap: 2rem; flex-wrap: wrap; }
  .print-footer { margin-top: 1rem; text-align: right; font-size: 9px; }
  @page { size: A4; margin: 12mm; }
}