/* Kompressor Koll: mobile-first, no external resources */
:root {
  --navy: #0f2a44;
  --navy-2: #173a5c;
  --ink: #1b2430;
  --muted: #55606e;
  --line: #dfe4ea;
  --bg: #ffffff;
  --bg-soft: #f4f6f9;
  --accent: #f5b700;
  --accent-ink: #6b4f00;
  --link: #0b5cad;
  --ok: #1f7a4d;
  --warn-bg: #fff4e5;
  --warn-line: #e08600;
  --insight-bg: #eef5ff;
  --insight-line: #2f6fbf;
  --radius: 10px;
  --wrap: 1180px;
  --measure: 72ch;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 76px; }
body { margin: 0; font-family: var(--font); font-size: 1.0625rem; line-height: 1.65; color: var(--ink); background: var(--bg); }
img, svg { max-width: 100%; height: auto; }
a { color: var(--link); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 3px; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 1rem; }
.skip { position: absolute; left: -999px; top: 0; background: var(--accent); color: #000; padding: .6rem 1rem; z-index: 100; font-weight: 700; }
.skip:focus { left: .5rem; top: .5rem; }
.small { font-size: .875rem; }

/* Header */
.site-header { background: var(--navy); color: #fff; position: sticky; top: 0; z-index: 50; box-shadow: 0 1px 0 rgba(0,0,0,.2); }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 60px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: .55rem; color: #fff; text-decoration: none; font-size: 1.2rem; letter-spacing: -.01em; }
.brand b { color: var(--accent); font-weight: 800; }
.brand .logo-mark rect, .brand .logo-mark circle:not([fill="#f5b700"]) { fill: #fff; }
.brand .logo-mark path, .brand .logo-mark circle[fill="#f5b700"] { stroke: var(--navy); }
.nav-toggle { display: none; background: transparent; border: 1px solid rgba(255,255,255,.4); color: #fff; font: inherit; font-size: .95rem; padding: .4rem .8rem; border-radius: 8px; cursor: pointer; }
.main-nav { width: 100%; }
.js .nav-toggle { display: inline-block; }
.js .main-nav { display: none; }
.js .main-nav.open { display: block; }
.main-nav ul { list-style: none; margin: 0; padding: .25rem 0 .75rem; }
.main-nav a { display: block; color: #fff; text-decoration: none; padding: .6rem .25rem; border-bottom: 1px solid rgba(255,255,255,.1); }
.main-nav a[aria-current="page"] { color: var(--accent); }
@media (min-width: 900px) {
  .js .nav-toggle { display: none; }
  .main-nav, .js .main-nav { display: block; width: auto; }
  .main-nav ul { display: flex; gap: .2rem; padding: 0; }
  .main-nav a { border: 0; padding: .5rem .7rem; border-radius: 8px; font-size: .97rem; }
  .main-nav a:hover { background: rgba(255,255,255,.1); }
}

/* Page head */
.page-head { background: var(--bg-soft); border-bottom: 1px solid var(--line); padding: 1rem 0 1.4rem; }
.page-head h1 { font-size: clamp(1.7rem, 4.5vw, 2.6rem); line-height: 1.15; margin: .4rem 0 .6rem; letter-spacing: -.02em; color: var(--navy); max-width: 30ch; }
.lead { font-size: 1.15rem; color: #2c3744; max-width: var(--measure); margin: 0 0 .6rem; }
.byline { color: var(--muted); font-size: .9rem; margin: .4rem 0 0; }
.byline a { color: var(--muted); }
.crumbs ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .25rem; font-size: .875rem; color: var(--muted); }
.crumbs li + li::before { content: "›"; margin-right: .3rem; color: #9aa4b0; }
.crumbs a { color: var(--muted); }

/* Layout */
main { display: block; }
.layout-article, .layout-plain { padding-top: 1.5rem; padding-bottom: 3rem; }
.layout-article { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
@media (min-width: 1040px) {
  .layout-article { grid-template-columns: 260px minmax(0, 1fr); gap: 3rem; }
  .layout-article .toc { position: sticky; top: 84px; align-self: start; max-height: calc(100vh - 100px); overflow: auto; }
}
.content { max-width: var(--measure); min-width: 0; }
.layout-plain .content { max-width: none; }
.kind-page .layout-plain .content, .kind-hub .content > p, .kind-hub .content > ul, .kind-hub .content > ol, .kind-hub .content > h2, .kind-hub .content > div { max-width: var(--measure); }

/* Typography in content */
.content h2 { font-size: 1.5rem; line-height: 1.25; margin: 2.2rem 0 .7rem; color: var(--navy); letter-spacing: -.01em; }
.content h3 { font-size: 1.18rem; margin: 1.6rem 0 .5rem; color: var(--navy-2); }
.content p, .content ul, .content ol { margin: 0 0 1rem; }
.content li { margin-bottom: .35rem; }
.content strong { color: #111a24; }
code { font-family: var(--mono); font-size: .92em; background: var(--bg-soft); padding: .1em .35em; border-radius: 4px; }

/* TOC */
.toc details { background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius); padding: .6rem 1rem; }
.toc summary { font-weight: 700; cursor: pointer; color: var(--navy); }
.toc ol { margin: .5rem 0 .2rem; padding-left: 1.2rem; font-size: .93rem; }
.toc li { margin: .3rem 0; }
.toc a { color: var(--ink); text-decoration: none; }
.toc a:hover { color: var(--link); text-decoration: underline; }

/* Boxes */
.keyfacts { border: 2px solid var(--navy); border-radius: var(--radius); padding: 1rem 1.2rem .3rem; margin: 0 0 1.6rem; background: #fff; position: relative; }
.keyfacts h2 { margin: 0 0 .5rem; font-size: 1.05rem; text-transform: uppercase; letter-spacing: .06em; color: var(--navy); }
.keyfacts h2::before { content: ""; display: inline-block; width: .7rem; height: .7rem; border-radius: 50%; background: var(--accent); margin-right: .5rem; vertical-align: .05em; }
.keyfacts ul { padding-left: 1.2rem; }
.callout { border-left: 5px solid var(--accent); background: #fffbea; padding: .8rem 1rem; border-radius: 0 var(--radius) var(--radius) 0; margin: 1.3rem 0; }
.callout p:last-child { margin-bottom: 0; }
.callout.warn { border-color: var(--warn-line); background: var(--warn-bg); }
.callout.insight { border-color: var(--insight-line); background: var(--insight-bg); }
.example { border: 1px dashed #9bb0c6; border-radius: var(--radius); padding: .9rem 1.1rem .2rem; margin: 1.3rem 0; background: #fafcff; }
.example h3 { margin-top: 0; font-size: 1.05rem; }
ol.steps { list-style: none; counter-reset: s; padding-left: 0; }
ol.steps > li { counter-increment: s; position: relative; padding-left: 2.6rem; margin-bottom: .9rem; }
ol.steps > li::before { content: counter(s); position: absolute; left: 0; top: .05rem; width: 1.8rem; height: 1.8rem; border-radius: 50%; background: var(--navy); color: #fff; font-weight: 700; display: grid; place-items: center; font-size: .9rem; }
.sources { font-size: .93rem; color: #3b4652; }
dl dt { font-weight: 700; color: var(--navy); margin-top: 1rem; }
dl dd { margin: .2rem 0 0; }

/* Tables */
.table-wrap { overflow-x: auto; margin: 1.2rem 0 1.5rem; border: 1px solid var(--line); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; font-size: .93rem; min-width: 520px; }
caption { text-align: left; font-weight: 700; padding: .7rem .8rem; color: var(--navy); background: var(--bg-soft); border-bottom: 1px solid var(--line); }
th, td { padding: .55rem .75rem; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
thead th { background: var(--navy); color: #fff; font-weight: 600; white-space: nowrap; }
tbody tr:nth-child(even) { background: #fafbfc; }
tbody tr:last-child td { border-bottom: 0; }

/* FAQ */
.faq details { border: 1px solid var(--line); border-radius: var(--radius); margin: .6rem 0; background: #fff; }
.faq summary { cursor: pointer; padding: .8rem 1rem; font-weight: 650; color: var(--navy); list-style: none; position: relative; padding-right: 2.5rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 1rem; top: .65rem; font-size: 1.3rem; color: var(--muted); }
.faq details[open] summary::after { content: "−"; }
.faq details > div { padding: 0 1rem .4rem; }

/* Cards */
.cards { list-style: none; padding: 0; margin: 1rem 0; display: grid; grid-template-columns: 1fr; gap: .8rem; }
@media (min-width: 640px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1040px) { .layout-plain .cards { grid-template-columns: repeat(3, 1fr); } }
.card a { display: block; height: 100%; border: 1px solid var(--line); border-radius: var(--radius); padding: .9rem 1rem; text-decoration: none; color: var(--ink); background: #fff; transition: border-color .15s, box-shadow .15s; }
.card a:hover { border-color: var(--navy); box-shadow: 0 2px 10px rgba(15,42,68,.08); }
.card-title { display: block; font-weight: 700; color: var(--navy); margin-bottom: .25rem; line-height: 1.3; }
.card-text { display: block; font-size: .92rem; color: var(--muted); line-height: 1.5; }
.related { margin-top: 2.5rem; border-top: 1px solid var(--line); padding-top: .5rem; }
.feedback { margin-top: 2rem; background: var(--bg-soft); border-radius: var(--radius); padding: .9rem 1.1rem; font-size: .95rem; }
.feedback p { margin: 0; }
.chips { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: .5rem; }
.chips a { display: inline-block; border: 1px solid var(--line); border-radius: 999px; padding: .35rem .8rem; text-decoration: none; font-size: .92rem; color: var(--navy); background: #fff; }
.chips a:hover { border-color: var(--navy); }
.other-topics { margin-top: 2.5rem; }
.other-topics h2 { font-size: 1.2rem; color: var(--navy); }

/* Tiles (home + topics) */
.tiles { list-style: none; padding: 0; margin: 1rem 0 2rem; display: grid; grid-template-columns: 1fr; gap: .7rem; }
@media (min-width: 600px) { .tiles { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .tiles { grid-template-columns: repeat(4, 1fr); } }
.tiles a { display: block; height: 100%; padding: .9rem 1rem; border-radius: var(--radius); border: 1px solid var(--line); text-decoration: none; background: #fff; border-top: 4px solid var(--accent); }
.tiles a:hover { border-color: var(--navy); border-top-color: var(--accent); }
.tile-name { display: block; font-weight: 750; color: var(--navy); }
.tile-desc { display: block; font-size: .88rem; color: var(--muted); line-height: 1.45; margin-top: .2rem; }
.topic-block { border-top: 1px solid var(--line); padding-top: .4rem; margin-bottom: 1.5rem; }
.topic-block h2 a { color: var(--navy); text-decoration: none; }
.link-list { columns: 1; padding-left: 1.1rem; }
@media (min-width: 760px) { .link-list { columns: 2; column-gap: 2.5rem; } }

/* Home */
.hero { background: linear-gradient(135deg, var(--navy) 0%, #1d4a73 100%); color: #fff; padding: 2.4rem 0 2.6rem; }
.hero h1 { font-size: clamp(1.9rem, 5.5vw, 3.1rem); line-height: 1.1; margin: 0 0 .8rem; letter-spacing: -.02em; max-width: 22ch; }
.hero h1 span { color: var(--accent); }
.hero p { font-size: 1.15rem; max-width: 60ch; color: #dbe6f2; margin: 0 0 1.3rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .6rem; }
.btn { display: inline-block; padding: .7rem 1.1rem; border-radius: 8px; font-weight: 700; text-decoration: none; }
.btn-primary { background: var(--accent); color: #1a1300; }
.btn-ghost { border: 1px solid rgba(255,255,255,.5); color: #fff; }
.btn:hover { filter: brightness(1.05); }
.airpath { list-style: none; padding: 0; margin: 1.5rem 0 0; display: flex; flex-wrap: wrap; gap: .4rem; font-size: .9rem; }
.airpath li { display: flex; align-items: center; gap: .4rem; }
.airpath a { color: #fff; background: rgba(255,255,255,.12); padding: .3rem .65rem; border-radius: 999px; text-decoration: none; }
.airpath a:hover { background: rgba(255,255,255,.22); }
.airpath li + li::before { content: "→"; color: var(--accent); }
.home-section { padding: 2rem 0 .5rem; }
.home-section h2 { font-size: 1.6rem; color: var(--navy); margin: 0 0 .4rem; letter-spacing: -.01em; }
.home-section > .wrap > p { color: var(--muted); max-width: 70ch; }
.quick-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; margin: 1rem 0; }
@media (min-width: 800px) { .quick-grid { grid-template-columns: repeat(3, 1fr); } }
.quick { border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; background: #fff; }
.quick h3 { margin: 0 0 .4rem; font-size: 1.1rem; color: var(--navy); }
.quick ul { padding-left: 1.1rem; margin: 0; }
.rule-box { background: var(--bg-soft); border-radius: var(--radius); padding: 1.2rem; display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 800px) { .rule-box { grid-template-columns: repeat(3, 1fr); } }
.rule-box div { background: #fff; border-radius: 8px; padding: 1rem; border: 1px solid var(--line); }
.rule-box strong { display: block; font-size: 1.6rem; color: var(--navy); line-height: 1.1; margin-bottom: .3rem; }

/* Calculators */
.calc { border: 2px solid var(--navy); border-radius: 14px; padding: 1.1rem; margin: 0 0 2rem; background: #fff; }
.calc h2 { margin-top: 0; }
.calc-grid { display: grid; grid-template-columns: 1fr; gap: .8rem 1rem; }
@media (min-width: 640px) { .calc-grid { grid-template-columns: 1fr 1fr; } }
.field label, .field .lbl { display: block; font-weight: 650; font-size: .95rem; margin-bottom: .25rem; color: var(--navy); }
.field .hint { display: block; font-size: .82rem; color: var(--muted); margin-top: .2rem; }
.field input, .field select { width: 100%; font: inherit; padding: .55rem .65rem; border: 1px solid #b8c2cd; border-radius: 8px; background: #fff; color: var(--ink); min-height: 44px; }
.field input:focus, .field select:focus { border-color: var(--navy); }
.result { margin-top: 1rem; background: var(--navy); color: #fff; border-radius: 10px; padding: 1rem 1.1rem; }
.result p { margin: .2rem 0; }
.result .big { font-size: 1.7rem; font-weight: 800; color: var(--accent); line-height: 1.2; }
.result .note { color: #c9d6e3; font-size: .9rem; }
.tool-rows { display: grid; gap: .5rem; margin: .5rem 0 1rem; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.tool-head { display: grid; grid-template-columns: 1fr 4.6rem 4.6rem 2.75rem; gap: .5rem; font-size: .8rem; color: var(--muted); font-weight: 600; }
.tool-row { display: grid; grid-template-columns: 1fr 4.6rem 4.6rem 2.75rem; gap: .5rem; align-items: center; }
.tool-row select, .tool-row input { font: inherit; padding: .5rem; border: 1px solid #b8c2cd; border-radius: 8px; min-height: 44px; width: 100%; }
.tool-row button, .btn-add { font: inherit; min-height: 44px; border-radius: 8px; border: 1px solid #b8c2cd; background: var(--bg-soft); cursor: pointer; }
.btn-add { padding: .5rem 1rem; font-weight: 650; color: var(--navy); }

/* Footer */
.site-footer { background: var(--navy); color: #c9d6e3; margin-top: 2rem; font-size: .95rem; }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; padding-top: 2.2rem; padding-bottom: 1.5rem; }
@media (min-width: 800px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; } }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin: .35rem 0; }
.site-footer a { color: #fff; text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }
.brand-footer { margin-bottom: .6rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding-top: 1rem; padding-bottom: 1.4rem; font-size: .85rem; }
.footer-bottom p { margin: 0; }

@media print {
  .site-header, .site-footer, .toc, .related, .feedback, .other-topics { display: none; }
  body { font-size: 11pt; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }