/* kw-ps.de  -  Ingenieurs-Werkstatt: warmes Papier, Petrol, Amber-Marker */

/* ---- Fonts (lokal, DSGVO) ---- */
@font-face{font-family:'Space Grotesk';src:url('/assets/fonts/space-grotesk-500.woff2') format('woff2');font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:'Space Grotesk';src:url('/assets/fonts/space-grotesk-700.woff2') format('woff2');font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:'DM Sans';src:url('/assets/fonts/dm-sans-400.woff2') format('woff2');font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:'DM Sans';src:url('/assets/fonts/dm-sans-500.woff2') format('woff2');font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:'DM Sans';src:url('/assets/fonts/dm-sans-700.woff2') format('woff2');font-weight:700;font-style:normal;font-display:swap}

/* ---- Tokens ---- */
:root{
  --paper:#f7f4ee; --paper-2:#fffdf8; --white:#fff;
  --ink:#16191d; --ink-soft:#525c66; --ink-mute:#8a929b;
  --primary:#0d7d84; --primary-deep:#0a5c62; --primary-tint:#e2f0f0;
  --amber:#ffd24a; --amber-soft:#ffe9a8;
  --line:#e7e1d5; --line-2:#d8d1c2;
  --shadow:0 1px 2px rgba(20,25,29,.04), 0 8px 30px -12px rgba(13,92,98,.18);
  --r:14px; --r-lg:22px;
  --disp:'Space Grotesk',system-ui,sans-serif; --body:'DM Sans',system-ui,sans-serif;
  --ease:cubic-bezier(.16,1,.3,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{font-family:var(--body);background:var(--paper);color:var(--ink);line-height:1.65;font-size:17px;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
a{color:var(--primary-deep);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{font-family:var(--disp);font-weight:700;line-height:1.08;letter-spacing:-.02em;color:var(--ink)}
img{max-width:100%;height:auto}
.wrap{width:100%;max-width:1120px;margin-inline:auto;padding-inline:24px}
.skip{position:absolute;left:-999px}
.skip:focus{left:16px;top:16px;background:var(--ink);color:#fff;padding:10px 16px;border-radius:10px;z-index:20}

/* ---- Header ---- */
.site-head{position:sticky;top:0;z-index:10;background:rgba(247,244,238,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.head-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{font-family:var(--disp);font-weight:700;font-size:1.35rem;letter-spacing:-.03em;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand-mark{display:inline-flex;align-items:center;gap:.1em}
.brand-arrow{color:var(--primary);font-weight:700}
.site-nav{display:flex;gap:28px}
.site-nav a{font-family:var(--disp);font-weight:500;font-size:.98rem;color:var(--ink-soft)}
.site-nav a:hover{color:var(--primary-deep);text-decoration:none}

/* ---- Hero ---- */
.hero{padding:64px 0 40px;position:relative}
.hero::before,.hero::after{content:'';position:absolute;border-radius:50%;filter:blur(2px);opacity:.5;z-index:0}
.hero::before{width:14px;height:14px;background:var(--amber);top:90px;left:8%;box-shadow:0 0 0 6px var(--amber-soft)}
.hero::after{width:22px;height:22px;background:var(--primary-tint);border:3px solid var(--primary);top:220px;right:7%;opacity:.7}
.hero-inner{position:relative;z-index:1;text-align:center;max-width:820px}
.badge{display:inline-block;font-family:var(--disp);font-weight:500;font-size:.9rem;background:var(--white);
  border:1px solid var(--line-2);border-radius:100px;padding:8px 18px;color:var(--ink-soft);box-shadow:var(--shadow)}
.hero-h1{font-size:clamp(2.5rem,6.4vw,4.4rem);margin:26px 0 0;letter-spacing:-.035em}
.hero-h1 .grad{background:linear-gradient(100deg,var(--primary),#12a0a8);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-h1 mark{background:transparent;color:inherit;position:relative;padding:0 .05em}
.hero-h1 mark::before{content:'';position:absolute;left:-.04em;right:-.04em;bottom:.06em;height:.42em;background:var(--amber);
  z-index:-1;transform:scaleX(0);transform-origin:left;border-radius:3px;animation:mark 1s var(--ease) .5s forwards}
@keyframes mark{to{transform:scaleX(1)}}
.hero-sub{font-size:1.18rem;color:var(--ink-soft);max-width:60ch;margin:22px auto 0}

/* ---- Rechner-Window ---- */
.calc-window{margin:40px auto 0;max-width:660px;background:var(--white);border:1px solid var(--line-2);
  border-radius:var(--r-lg);box-shadow:0 2px 4px rgba(20,25,29,.04),0 30px 60px -28px rgba(13,92,98,.35);overflow:hidden;text-align:left}
.cw-bar{display:flex;align-items:center;gap:8px;padding:13px 18px;background:#f4efe6;border-bottom:1px solid var(--line)}
.cw-bar span{width:12px;height:12px;border-radius:50%;background:#d8d1c2}
.cw-bar span:first-child{background:#ff6f5e}.cw-bar span:nth-child(2){background:#ffce4a}.cw-bar span:nth-child(3){background:#3fca7a}
.cw-bar em{margin-left:8px;font-family:var(--disp);font-style:normal;font-size:.82rem;color:var(--ink-mute)}
.cw-body{padding:30px 28px 24px}
.calc-hint{text-align:center;font-size:.86rem;color:var(--ink-mute);margin-top:16px;font-family:var(--disp)}

.calc-big{display:grid;grid-template-columns:1fr auto 1fr;gap:14px;align-items:end}
.calc-field{display:flex;flex-direction:column;gap:7px}
.calc-lbl{font-family:var(--disp);font-weight:500;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-mute)}
.calc-input{display:flex;align-items:baseline;gap:8px;background:var(--paper);border:2px solid var(--line-2);
  border-radius:var(--r);padding:12px 16px;transition:border-color .2s,box-shadow .2s}
.calc-input:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-tint)}
.calc-input input{width:100%;border:0;background:transparent;font-family:var(--disp);font-weight:700;
  font-size:2rem;color:var(--ink);outline:none;min-width:0}
.calc-input em{font-family:var(--disp);font-style:normal;font-weight:500;font-size:1rem;color:var(--primary-deep)}
.calc-swap{align-self:center;margin-bottom:6px;width:46px;height:46px;flex:none;border:0;cursor:pointer;
  background:var(--primary);color:#fff;border-radius:50%;font-size:1.3rem;line-height:1;
  box-shadow:0 6px 16px -6px var(--primary);transition:transform .45s var(--ease),background .2s}
.calc-swap:hover{background:var(--primary-deep)}
.calc-swap:active{transform:rotate(180deg)}

.quick-chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:26px}
.chip{font-family:var(--disp);font-weight:500;font-size:.92rem;background:var(--white);border:1px solid var(--line-2);
  border-radius:100px;padding:8px 16px;color:var(--ink-soft);transition:transform .25s var(--ease),border-color .2s,color .2s}
.chip:hover{text-decoration:none;transform:translateY(-2px);border-color:var(--primary);color:var(--primary-deep)}

/* ---- Prose ---- */
.prose{max-width:720px;padding-top:56px;padding-bottom:24px}
.prose h2{font-size:clamp(1.5rem,3.4vw,2rem);margin:52px 0 16px}
.prose h2:first-child{margin-top:0}
.prose p{margin:0 0 16px;color:var(--ink-soft);max-width:65ch}
.prose p strong{color:var(--ink)}
.formula-line{font-family:var(--disp);font-weight:500;background:var(--primary-tint);border-left:4px solid var(--primary);
  border-radius:10px;padding:16px 20px;color:var(--ink);font-size:1.15rem}
.formula-line.big{font-size:1.5rem;text-align:center;border-left:0;border-top:4px solid var(--primary)}
.formula-line strong{color:var(--primary-deep)}

/* ---- Tabellen ---- */
table{width:100%;border-collapse:collapse;margin:8px 0 8px;font-family:var(--disp);font-size:.98rem}
.conv-table{background:var(--white);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow)}
th{text-align:left;font-weight:500;font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-mute);
  padding:14px 18px;background:#f4efe6;border-bottom:1px solid var(--line)}
td{padding:12px 18px;border-bottom:1px solid var(--line);color:var(--ink)}
tbody tr:last-child td{border-bottom:0}
tbody tr{transition:background .15s}
tbody tr:hover{background:var(--primary-tint)}
.conv-table td:nth-child(2){font-weight:700;color:var(--primary-deep)}
.conv-table td a{font-weight:500;font-size:.86rem}

/* ---- Umrechnungs-Kacheln (Startseite) ---- */
.conv-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(155px,1fr));gap:12px;margin:16px 0 8px}
.conv-tile{display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;gap:3px;
  background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px;font-family:var(--disp);
  transition:transform .25s var(--ease),border-color .2s,box-shadow .2s}
.conv-tile:hover{text-decoration:none;transform:translateY(-3px);border-color:var(--primary);box-shadow:var(--shadow)}
.ct-kw{font-size:1.45rem;color:var(--ink);font-weight:500;letter-spacing:-.01em}
.ct-kw b{font-weight:700}
.ct-ps{font-size:1rem;color:var(--primary-deep);font-weight:500}
@media(max-width:520px){.conv-grid{grid-template-columns:repeat(2,1fr)}}

/* ---- Vergleiche ---- */
.compare{display:grid;gap:0;margin-top:12px;border-top:1px solid var(--line)}
.compare>div{display:grid;grid-template-columns:180px 1fr;gap:20px;padding:18px 4px;border-bottom:1px solid var(--line)}
.compare dt{font-family:var(--disp);font-weight:700;color:var(--ink)}
.compare dd{color:var(--ink-soft)}

/* ---- FAQ ---- */
details{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:4px 20px;margin:10px 0;transition:border-color .2s}
details[open]{border-color:var(--line-2)}
summary{font-family:var(--disp);font-weight:500;cursor:pointer;padding:14px 0;list-style:none;color:var(--ink)}
summary::-webkit-details-marker{display:none}
summary::after{content:'+';float:right;color:var(--primary);font-size:1.3rem;line-height:1;transition:transform .2s}
details[open] summary::after{transform:rotate(45deg)}
details p{margin:0 0 16px;color:var(--ink-soft)}

/* ---- Umrechnungsseite ---- */
.conv{max-width:720px;padding-top:40px;padding-bottom:32px}
.crumbs{font-family:var(--disp);font-size:.88rem;color:var(--ink-mute);margin-bottom:18px}
.crumbs span{margin:0 6px}
.conv h1{font-size:clamp(2.2rem,6vw,3.4rem)}
.result-card{margin:24px 0 28px;background:var(--white);border:1px solid var(--line-2);border-radius:var(--r-lg);
  padding:32px 28px;box-shadow:var(--shadow);text-align:center}
.result-eq{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:16px;font-family:var(--disp)}
.result-eq .r-from,.result-eq .r-to{font-size:1.3rem;color:var(--ink-soft)}
.result-eq strong{display:block;font-size:3rem;line-height:1;color:var(--ink)}
.result-eq .r-to strong{color:var(--primary)}
.result-eq .r-op{font-size:2rem;color:var(--ink-mute);font-weight:500}
.result-note{margin-top:20px;color:var(--ink-soft);font-size:.98rem}
.result-note strong{color:var(--ink)}
.conv .lead{font-size:1.12rem;color:var(--ink-soft);margin:0 0 8px;max-width:65ch}
.conv section{margin-top:40px}
.conv h2{font-size:1.4rem;margin-bottom:14px}
.mini-calc .calc{display:flex;align-items:center;gap:12px;flex-wrap:wrap;background:var(--white);border:1px solid var(--line);
  border-radius:var(--r);padding:16px 18px}
.mini-calc label{display:flex;align-items:center;gap:8px;font-family:var(--disp);font-weight:500;color:var(--ink-soft)}
.mini-calc input{width:120px;font-family:var(--disp);font-weight:700;font-size:1.2rem;padding:8px 12px;
  border:2px solid var(--line-2);border-radius:10px;background:var(--paper);color:var(--ink);outline:none}
.mini-calc input:focus{border-color:var(--primary)}
.mini-calc .calc-swap{background:var(--primary);color:#fff}
.chip-row{display:flex;flex-wrap:wrap;gap:10px}
.dec-table table{max-width:420px}
.err404{padding-top:64px;min-height:50vh}

/* ---- Legal ---- */
.legal{max-width:760px}
.legal-date{color:var(--ink-mute);font-family:var(--disp);font-size:.9rem;margin-bottom:8px}
.legal h2{font-size:1.3rem;margin-top:34px}
.legal p{font-size:.98rem}

/* ---- Langtext ---- */
.longtext{margin:28px 0 8px}
.longtext h2{font-size:clamp(1.4rem,3vw,1.8rem);margin-bottom:16px}
.longtext h3{font-family:var(--disp);font-size:1.2rem;font-weight:700;color:var(--ink);letter-spacing:-.01em;margin:28px 0 10px}
.longtext p{margin:0 0 16px;color:var(--ink-soft);max-width:65ch}
.longtext p:first-of-type{font-size:1.08rem;color:var(--ink)}

/* ---- Anzeigenplaetze ---- */
.ad-slot{margin:28px auto;max-width:728px;min-height:100px}
.ad-placeholder{display:flex;align-items:center;justify-content:center;min-height:110px;
  border:1px dashed var(--line-2);border-radius:var(--r);background:rgba(255,255,255,.4)}
.ad-placeholder span{font-family:var(--disp);font-size:.78rem;text-transform:uppercase;letter-spacing:.1em;color:var(--ink-mute)}

/* ---- Footer ---- */
.site-foot{margin-top:64px;background:var(--ink);color:#c9d0d6;padding:48px 0 28px}
.foot-inner{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;padding-bottom:26px;border-bottom:1px solid rgba(255,255,255,.1)}
.foot-brand .brand-mark{font-family:var(--disp);font-weight:700;font-size:1.3rem;color:#fff}
.foot-brand .brand-arrow{color:var(--amber)}
.foot-brand p{margin-top:10px;font-size:.95rem;color:#9aa4ad;max-width:38ch}
.foot-nav{display:flex;flex-direction:column;gap:10px}
.foot-nav a{color:#c9d0d6;font-family:var(--disp);font-weight:500}
.foot-nav a:hover{color:#fff}
.foot-legal{padding-top:20px}
.foot-legal p{font-size:.85rem;color:#7c868f}

/* ---- Page-Load-Reveal ---- */
@media (prefers-reduced-motion:no-preference){
  .hero-inner>*{opacity:0;transform:translateY(16px);animation:rise .8s var(--ease) forwards}
  .hero-inner>.badge{animation-delay:.05s}
  .hero-inner>.hero-h1{animation-delay:.14s}
  .hero-inner>.hero-sub{animation-delay:.24s}
  .hero-inner>.calc-window{animation-delay:.34s}
  .hero-inner>.quick-chips{animation-delay:.46s}
}
@keyframes rise{to{opacity:1;transform:none}}

/* ---- Responsive ---- */
@media(max-width:680px){
  body{font-size:16px}
  .site-nav{gap:18px}
  .site-nav a{font-size:.9rem}
  .hero{padding:44px 0 30px}
  .calc-big{grid-template-columns:1fr;gap:10px}
  .calc-swap{justify-self:center;transform:rotate(90deg)}
  .calc-swap:active{transform:rotate(270deg)}
  .cw-body{padding:24px 20px}
  .result-eq strong{font-size:2.4rem}
  .compare>div{grid-template-columns:1fr;gap:4px}
}
@media(max-width:400px){
  .head-inner{height:58px}
  .calc-input input{font-size:1.7rem}
}