/* prøvlykken.dk - "matematikhæftet": kvadreret papir, kuglepensblå streg, koral og overstregningsgul */
@font-face { font-family: "Syne"; src: url("/assets/fonts/syne-500-800.woff2") format("woff2"); font-weight: 500 800; font-style: normal; font-display: swap; }
@font-face { font-family: "Mulish"; src: url("/assets/fonts/mulish.woff2") format("woff2"); font-weight: 400 700; font-style: normal; font-display: swap; }
@font-face { font-family: "Chivo Mono"; src: url("/assets/fonts/chivo-mono.woff2") format("woff2"); font-weight: 400 500; font-style: normal; font-display: swap; }

:root {
  --papir: #fbfbf6;
  --linje: rgba(35, 70, 209, .085);
  --blaek: #1b2140;
  --blaek-2: #4b5170;
  --pen: #2346d1;
  --pen-lys: #e6ebfb;
  --koral: #e5553d;
  --gul: #fff1a6;
  --hvid: #ffffff;
  --display: "Syne", "Trebuchet MS", sans-serif;
  --sans: "Mulish", system-ui, sans-serif;
  --mono: "Chivo Mono", ui-monospace, monospace;
  --maal: 68ch;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; color: var(--blaek); font: 400 1.0625rem/1.65 var(--sans);
  background-color: var(--papir);
  background-image: linear-gradient(var(--linje) 1px, transparent 1px), linear-gradient(90deg, var(--linje) 1px, transparent 1px);
  background-size: 22px 22px;
}
::selection { background: var(--gul); color: var(--blaek); }
:focus-visible { outline: 2.5px solid var(--koral); outline-offset: 3px; border-radius: 3px; }
a { color: var(--pen); text-decoration-thickness: 1.5px; text-underline-offset: .2em; }
a:hover { color: var(--koral); }
h1, h2, h3 { font-family: var(--display); font-weight: 700; line-height: 1.08; text-wrap: balance; margin: 0; }
h1 { font-size: clamp(2rem, 6vw, 4.2rem); font-weight: 700; letter-spacing: -.03em; overflow-wrap: break-word; }
h2 { font-size: clamp(1.5rem, 3vw, 2.05rem); letter-spacing: -.02em; margin-top: 2.6rem; margin-bottom: .75rem; }
h3 { font-size: 1.2rem; margin-top: 1.8rem; margin-bottom: .4rem; }
p, ul, ol { margin: 0 0 1rem; }
.ramme { width: min(1120px, 100% - 32px); margin-inline: auto; }
.smal { width: min(760px, 100% - 32px); }
.spring { position: absolute; left: -999px; top: 0; background: var(--blaek); color: var(--hvid); padding: .6rem 1rem; z-index: 10; }
.spring:focus { left: 16px; top: 16px; }
.skjult { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.mark { background: linear-gradient(transparent 55%, var(--gul) 55%); padding: 0 .1em; }
.brok, .tal { font-family: var(--mono); font-size: .92em; font-variant-numeric: tabular-nums; white-space: nowrap; }

.top { background: var(--papir); border-bottom: 2px solid var(--blaek); }
.top-ind { display: flex; align-items: center; justify-content: space-between; gap: .8rem 2rem; padding: .95rem 0; flex-wrap: wrap; }
.ordmaerke { display: inline-flex; align-items: center; gap: .55rem; text-decoration: none; color: var(--blaek); font: 800 1.3rem/1 var(--display); letter-spacing: -.02em; }
.ordmaerke .logo { width: 28px; height: 28px; color: var(--pen); transform: rotate(-8deg); }
.ordmaerke:hover { color: var(--blaek); }
.menu { display: flex; flex-wrap: wrap; gap: .2rem 1.3rem; font-weight: 600; font-size: .95rem; }
.menu a { color: var(--blaek); text-decoration: none; padding: .2rem 0; }
.menu a:hover { color: var(--pen); }
.menu a[aria-current="page"] { background: linear-gradient(transparent 60%, var(--gul) 60%); }

/* forside */
.helt { padding: clamp(2.5rem, 7vw, 5.5rem) 0 clamp(2.5rem, 6vw, 4.5rem); }
.helt-ind { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.helt h1 { max-width: 12ch; }
.indledning { font-size: clamp(1.1rem, 1.7vw, 1.25rem); color: var(--blaek-2); max-width: 54ch; margin-top: 1.2rem; }
.knapper { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1.6rem; }
.knap { display: inline-block; font: 700 1rem/1 var(--sans); padding: .85rem 1.25rem; background: var(--pen); color: var(--hvid); text-decoration: none; border: 0; border-radius: 6px; cursor: pointer; box-shadow: 0 2px 0 rgba(27, 33, 64, .25), 0 6px 14px -8px rgba(35, 70, 209, .7); transition: transform .15s ease-out, background .2s ease-out; }
.knap:hover { background: #1b37a8; color: var(--hvid); transform: translateY(-1px); }
.knap:active { transform: translateY(1px); }
.knap-lys { background: var(--hvid); color: var(--blaek); box-shadow: inset 0 0 0 2px var(--blaek); }
.knap-lys:hover { background: var(--gul); color: var(--blaek); }
.tegning { width: 100%; height: auto; display: block; }
.tegning .streg { fill: var(--hvid); stroke: var(--pen); stroke-width: 3; stroke-linejoin: round; }
.tegning .oeje { fill: var(--pen); }
.tegning .koral { fill: none; stroke: var(--koral); stroke-width: 2.5; stroke-linecap: round; }
.tegning .note { font: 400 15px var(--mono); fill: var(--koral); }
.tegning .moent { fill: var(--gul); stroke: var(--blaek); stroke-width: 2.5; }
.tegning .moent-t { font: 800 22px var(--display); fill: var(--blaek); }

.sektion { padding: clamp(2.5rem, 6vw, 4.5rem) 0; border-top: 2px dashed rgba(27, 33, 64, .25); }
.sektion h2:first-child { margin-top: 0; }
.tre { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.5rem, 4vw, 3rem); }
.tre h3 { margin-top: 0; font-size: 1.3rem; }
.tre .stort { display: block; font: 700 clamp(2rem, 4vw, 2.6rem)/1 var(--display); color: var(--koral); margin-bottom: .6rem; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.tre p { color: var(--blaek-2); }

.genveje { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.genvej { display: block; background: var(--hvid); border: 2px solid var(--blaek); border-radius: 10px; padding: 1.1rem 1.2rem 1.25rem; text-decoration: none; color: var(--blaek); transition: transform .2s ease-out, box-shadow .2s ease-out; }
.genvej:hover { color: var(--blaek); transform: translateY(-3px) rotate(-.6deg); box-shadow: 0 10px 22px -14px rgba(27, 33, 64, .55); }
.genvej-titel { display: block; font: 700 1.2rem/1.2 var(--display); margin-bottom: .35rem; }
.genvej span:last-child { color: var(--blaek-2); font-size: .95rem; }

/* tekstsider */
.tekstside { padding: clamp(2.2rem, 6vw, 4.5rem) 0 clamp(3rem, 7vw, 5rem); }
.side-top { padding-bottom: 1.5rem; margin-bottom: .5rem; }
.side-top h1 { font-size: clamp(1.9rem, 5.4vw, 3.5rem); }
.artikel { max-width: var(--maal); }
.artikel ul, .artikel ol { padding-left: 1.3rem; }
.artikel li { margin-bottom: .45rem; }
.artikel li::marker { color: var(--koral); font-weight: 700; }
.regel { background: var(--hvid); border: 2px solid var(--blaek); border-radius: 10px; padding: 1rem 1.2rem; margin: 1.3rem 0; max-width: var(--maal); }
.regel p:last-child { margin-bottom: 0; }
.regel .formel { font: 500 1.15rem/1.4 var(--mono); color: var(--pen); display: block; margin: .3rem 0 .5rem; }
.hjaelp { background: var(--pen-lys); border-radius: 10px; padding: 1.1rem 1.3rem; margin: 2.2rem 0 0; max-width: var(--maal); }
.hjaelp h2 { margin-top: 0; font-size: 1.3rem; }
.hjaelp p:last-child { margin-bottom: 0; }

/* tabel */
.tabel-wrap { overflow-x: auto; max-width: var(--maal); margin: 1.2rem 0 1.6rem; }
table { border-collapse: collapse; width: 100%; background: var(--hvid); font-size: .97rem; }
th, td { padding: .5rem .75rem; text-align: left; border-bottom: 1px solid rgba(27, 33, 64, .15); white-space: nowrap; }
th { font: 700 .82rem var(--sans); text-transform: uppercase; letter-spacing: .03em; color: var(--blaek-2); border-bottom: 2px solid var(--blaek); }
td.tal, th.tal { text-align: right; }
.soejle { display: block; height: 10px; border-radius: 3px; background: var(--pen); min-width: 2px; }
td.bar { width: 40%; min-width: 120px; }

/* eksperiment */
.forsoeg { background: var(--hvid); border: 2px solid var(--blaek); border-radius: 12px; padding: clamp(1rem, 3vw, 1.6rem); margin: 1.4rem 0 2rem; }
.styring { display: flex; flex-wrap: wrap; gap: 1rem 1.6rem; align-items: flex-end; margin-bottom: 1.2rem; }
.styring fieldset { border: 0; padding: 0; margin: 0; }
.styring legend { font-weight: 700; font-size: .85rem; margin-bottom: .4rem; padding: 0; }
.valg { display: inline-flex; flex-wrap: wrap; gap: .3rem; }
.valg label { position: relative; }
.valg input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.valg span { display: inline-block; padding: .5rem .85rem; border: 2px solid var(--blaek); border-radius: 999px; font-weight: 600; font-size: .92rem; cursor: pointer; background: var(--papir); }
.valg input:checked + span { background: var(--blaek); color: var(--hvid); }
.valg input:focus-visible + span { outline: 2.5px solid var(--koral); outline-offset: 2px; }
.diagram { width: 100%; height: auto; display: block; }
.diagram .akse { stroke: var(--blaek); stroke-width: 1.5; }
.diagram .hjlp { stroke: rgba(27, 33, 64, .12); stroke-width: 1; }
.diagram .bar { fill: var(--pen); }
.diagram .forv { stroke: var(--koral); stroke-width: 3; stroke-linecap: round; }
.diagram text { font: 400 13px var(--mono); fill: var(--blaek-2); }
.diagram .lbl { font: 600 14px var(--sans); fill: var(--blaek); }
.forklaring { display: flex; flex-wrap: wrap; gap: .4rem 1.4rem; font-size: .9rem; color: var(--blaek-2); margin: .6rem 0 0; }
.forklaring i { display: inline-block; width: 14px; height: 10px; border-radius: 2px; background: var(--pen); margin-right: .4rem; vertical-align: middle; }
.forklaring i.f { height: 3px; background: var(--koral); }
.udfald { font-size: 1rem; margin: 1rem 0 0; }
.udfald strong { font-weight: 800; font-variant-numeric: tabular-nums; }

/* fod */
.bund { border-top: 2px solid var(--blaek); background: var(--hvid); padding: 2rem 0 2.5rem; font-size: .93rem; }
.bund-ind { display: flex; justify-content: space-between; gap: 1.5rem 3rem; flex-wrap: wrap; }
.bund-navn { font: 800 1.1rem var(--display); margin: 0 0 .3rem; }
.bund-tekst { color: var(--blaek-2); max-width: 46ch; margin: 0; }
.bund nav { display: flex; flex-wrap: wrap; gap: .3rem 1.2rem; align-content: flex-start; }

@media (max-width: 880px) {
  .helt-ind { grid-template-columns: 1fr; }
  .helt-tegning { max-width: 420px; }
  .tre { grid-template-columns: 1fr; }
  .genveje { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  body { font-size: 1rem; }
  .genveje { grid-template-columns: 1fr; }
  .menu { gap: .1rem 1rem; font-size: .9rem; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }
@media (max-width: 560px) { .diagram text { font-size: 12px; } .diagram .lbl { font-size: 13px; } }