/* ---------- Schriften (lokal, SIL OFL) ---------- */
@font-face{font-family:"Bricolage";font-style:normal;font-weight:700;font-display:swap;src:url("fonts/bricolage-grotesque-latin-700-normal.woff2") format("woff2")}
@font-face{font-family:"Plex";font-style:normal;font-weight:400;font-display:swap;src:url("fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2")}
@font-face{font-family:"Plex";font-style:normal;font-weight:600;font-display:swap;src:url("fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2")}

/* ---------- Farben & Grundwerte ---------- */
:root{
  --ink:#1b2430;        /* Text: Schiefer */
  --ink-soft:#54606c;
  --paper:#f3f4f2;      /* Seitenhintergrund */
  --sheet:#ffffff;      /* Maßblatt */
  --line:#d3d7d9;
  --grid:#e6e9ea;       /* Millimeterpapier */
  --oak:#c98a2e;        /* Eiche: Akzent */
  --oak-deep:#9a6717;
  --steel:#2c4d6b;      /* Links, Buttons */
  --steel-deep:#1f3a52;
  --red:#a8402f;
  --max:46rem;
  --head:"Bricolage","Segoe UI",Helvetica,Arial,sans-serif;
  --body:"Plex","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:1.0625rem;line-height:1.55}
a{color:var(--steel);text-decoration-thickness:1px;text-underline-offset:.15em}
a:hover{color:var(--steel-deep)}
:focus-visible{outline:3px solid var(--oak);outline-offset:2px}
h1,h2,h3{font-family:var(--head);font-weight:700;line-height:1.1;letter-spacing:-.015em;margin:0 0 .5em}
h1{font-size:clamp(1.9rem,4.5vw,2.8rem)}
h2{font-size:clamp(1.3rem,3vw,1.65rem);margin-top:2.2em}
h3{font-size:1.12rem;margin-top:1.6em}
p,ul,ol,table{margin:0 0 1em}
small,.muted{color:var(--ink-soft)}
code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.92em;background:#fff;padding:.05em .3em;border:1px solid var(--line);border-radius:3px}
.mm{font-variant-numeric:tabular-nums}

/* ---------- Kopf & Fuß ---------- */
.wrap{max-width:var(--max);margin:0 auto;padding:0 1.1rem}
header.site{background:var(--ink);color:#fff}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:3.6rem;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:.55rem;font-family:var(--head);font-size:1.2rem;color:#fff;text-decoration:none;letter-spacing:-.01em}
.brand svg{width:1.6rem;height:1.6rem;flex:none}
nav.main a{margin-left:1.1rem;color:#dfe5ea;text-decoration:none;font-size:.95rem}
nav.main a:hover{color:#fff;text-decoration:underline}
main{padding:2rem 0 3rem}
footer.site{border-top:1px solid var(--line);padding:1.6rem 0 2.4rem;font-size:.9rem;color:var(--ink-soft)}
footer.site a{color:inherit}
footer.site p{margin-bottom:.5em}

/* ---------- Startseite ---------- */
.lead{font-size:1.15rem;max-width:36rem;color:var(--ink-soft)}
.hero-tool{background:var(--sheet);border:1px solid var(--ink);padding:1.1rem 1.2rem;margin:1.6rem 0 2rem;position:relative}
.hero-tool::after{content:"";position:absolute;inset:4px;border:1px dashed var(--line);pointer-events:none}
.hero-tool h2{margin-top:0;font-size:1.15rem}
.hero-tool .row{display:flex;gap:.8rem;flex-wrap:wrap;align-items:end;position:relative;z-index:1}
.toollist{list-style:none;padding:0;margin:0;border-top:1px solid var(--ink)}
.toollist li{border-bottom:1px solid var(--line);padding:.9rem 0;display:grid;grid-template-columns:2.2rem 1fr auto;gap:.2rem 1rem;align-items:center}
.toollist .n{grid-row:1/3;font-family:var(--head);color:var(--oak);font-size:1.3rem}
.toollist a.t{font-family:var(--head);font-size:1.15rem;text-decoration:none;color:var(--ink)}
.toollist a.t:hover{color:var(--steel)}
.toollist span.d{grid-column:2;color:var(--ink-soft);font-size:.95rem}
.toollist .go{grid-row:1/3;grid-column:3;color:var(--steel);font-size:.95rem;white-space:nowrap}

/* ---------- Formulare ---------- */
form.calc{background:var(--sheet);border:1px solid var(--line);padding:1.2rem 1.2rem .6rem;margin:1.2rem 0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(11rem,1fr));gap:.9rem 1rem}
.grid.narrow{grid-template-columns:repeat(auto-fit,minmax(8rem,1fr))}
label{display:block;font-weight:600;font-size:.92rem;margin-bottom:.25rem}
label .hint{display:block;font-weight:400;color:var(--ink-soft);font-size:.85rem;margin-top:.1rem}
input[type=number],input[type=text],select{width:100%;font:inherit;font-size:1.05rem;padding:.5rem .6rem;border:1px solid #aeb5bb;border-radius:3px;background:#fff;color:var(--ink);font-variant-numeric:tabular-nums}
input:invalid{border-color:var(--red)}
.check{display:flex;align-items:center;gap:.5rem;font-weight:400;margin:.4rem 0}
.check input{width:1.15rem;height:1.15rem;accent-color:var(--steel)}
fieldset{border:0;padding:0;margin:0 0 1rem}
legend{font-weight:600;font-size:.92rem;padding:0;margin-bottom:.4rem;color:var(--oak-deep);text-transform:uppercase;letter-spacing:.04em}
.actions{display:flex;gap:.7rem;flex-wrap:wrap;margin:1rem 0 .6rem}
button,.btn{font:inherit;font-weight:600;font-size:1rem;padding:.6rem 1.1rem;border-radius:3px;border:1px solid var(--steel-deep);background:var(--steel);color:#fff;cursor:pointer;text-decoration:none;display:inline-block}
button:hover,.btn:hover{background:var(--steel-deep);color:#fff}
button.secondary,.btn.secondary{background:#fff;color:var(--steel-deep)}
button.secondary:hover{background:var(--paper)}
button.small{font-size:.88rem;padding:.35rem .7rem}

/* ---------- Maßblatt (Ergebnis) ---------- */
.result{background:var(--sheet) repeating-linear-gradient(0deg,transparent 0 9px,var(--grid) 9px 10px),repeating-linear-gradient(90deg,transparent 0 9px,var(--grid) 9px 10px);background-color:var(--sheet);border:1px solid var(--ink);padding:1rem 1.2rem;margin:1.2rem 0;position:relative}
.result::before{content:"MASSBLATT";position:absolute;top:-.6rem;left:.9rem;background:var(--paper);padding:0 .4rem;font-size:.7rem;letter-spacing:.12em;color:var(--oak-deep);font-weight:600}
.result h2{margin-top:0;font-size:1.2rem}
.result .big{font-family:var(--head);font-size:clamp(1.7rem,5vw,2.4rem);line-height:1.05;margin:.1em 0 .3em;font-variant-numeric:tabular-nums}
.result .big small{font-family:var(--body);font-size:1rem;color:var(--ink-soft);font-weight:400}
.kv{display:grid;grid-template-columns:1fr auto;gap:.35rem 1rem;margin:.6rem 0 0;background:rgba(255,255,255,.75);padding:.4rem .6rem}
.kv dt{color:var(--ink-soft)}
.kv dd{margin:0;font-weight:600;text-align:right;font-variant-numeric:tabular-nums}
.warn{background:#fbeeea;border-left:5px solid var(--red);padding:.7rem 1rem;margin:1rem 0}
.note{background:#fff;border:1px solid var(--line);padding:.7rem 1rem;margin:1rem 0;font-size:.95rem}
.sketch{display:block;width:100%;max-width:26rem;height:auto;margin:.8rem auto;background:#fff;border:1px solid var(--line)}
table{width:100%;border-collapse:collapse;font-size:.95rem;font-variant-numeric:tabular-nums;background:rgba(255,255,255,.85)}
th,td{text-align:left;padding:.45rem .5rem;border-bottom:1px solid var(--line);vertical-align:top}
th{font-weight:600}
td.num,th.num{text-align:right}
.tablewrap{overflow-x:auto;margin:1rem 0}

/* ---------- Produkte / Werbung ---------- */
.gear{border:1px dashed #c9b48a;background:#fffcf5;padding:1rem 1.2rem;margin:2rem 0 1rem}
.gear h2{margin-top:0;font-size:1.12rem}
.gear ul{padding-left:1.1rem;margin-bottom:.4rem}
.gear li{margin:.25rem 0}
.gear .ad{font-size:.85rem;color:var(--ink-soft);margin:.6rem 0 0}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(10rem,1fr));gap:.8rem;margin:.5rem 0 .8rem;padding:0;list-style:none}
.card{background:#fff;border:1px solid var(--line);padding:.7rem;display:flex;flex-direction:column;gap:.4rem;font-size:.9rem}
.card img{width:100%;height:7rem;object-fit:contain;background:#fff}
.card .imgbtn{height:7rem;background:var(--paper);border:1px dashed var(--line);color:var(--ink-soft);font-size:.8rem;font-weight:400;padding:.4rem}
.card .t{font-weight:600;line-height:1.3;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card .p{color:var(--ink-soft);font-size:.82rem}
.card a.btn{padding:.4rem .6rem;font-size:.88rem;text-align:center;margin-top:auto}
.assume{font-size:.95rem}
.assume details{margin:.6rem 0}
.assume summary{cursor:pointer;font-weight:600}

/* ---------- Ratgeber ---------- */
article.long{max-width:38rem}
article.long h2{margin-top:1.8em}
.checklist{list-style:none;padding:0}
.checklist li{padding:.35rem 0 .35rem 1.7rem;position:relative;border-bottom:1px solid var(--line)}
.checklist li::before{content:"";position:absolute;left:.15rem;top:.7rem;width:.8rem;height:.8rem;border:2px solid var(--steel);border-radius:2px}
.steps{counter-reset:s;list-style:none;padding:0}
.steps li{counter-increment:s;padding:.5rem 0 .5rem 2.4rem;position:relative;border-bottom:1px solid var(--line)}
.steps li::before{content:counter(s);position:absolute;left:0;top:.5rem;width:1.7rem;height:1.7rem;border-radius:50%;background:var(--oak);color:#fff;font-family:var(--head);text-align:center;line-height:1.7rem;font-size:.95rem}

@media(max-width:560px){
  .toollist li{grid-template-columns:2rem 1fr}
  .toollist .go{grid-row:auto;grid-column:2}
  nav.main a{margin-left:.8rem;font-size:.9rem}
}
@media print{
  header.site,footer.site,.gear,.actions,nav{display:none}
  body{background:#fff}
  .result{background:#fff;border:1px solid #000}
}