/* ====================================================
   SV-UK — Sachverständiger Uwe Kuttig
   Gestaltungsidee: Prüf-/Inspektionsdokument.
   Gedecktes Papier, dunkles Navy, Rost-Orange als
   Prüf-/Siegelfarbe, kondensierte Groteske für
   Überschriften, Serife für die dichten Fachtexte.
   ==================================================== */

:root{
  --paper:      #EAEBE4;
  --paper-raised: #F5F5F0;
  --ink:        #1B2430;
  --ink-soft:   #4B5563;
  --accent:     #B5501C;
  --accent-soft:#E7C9A9;
  --line:       #C7CBBE;
  --line-soft:  #D8DACF;
  --stamp-bg:   #1B2430;
  --stamp-fg:   #EAEBE4;

  --font-head: 'Archivo Narrow', 'Arial Narrow', sans-serif;
  --font-body: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --measure: 68ch;
}

*, *::before, *::after{ box-sizing:border-box; }

html{ scroll-behavior:smooth; }

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

a{ color:var(--accent); }
a:hover{ color:var(--ink); }

h1,h2,h3{
  font-family:var(--font-head);
  font-weight:700;
  line-height:1.15;
  color:var(--ink);
  margin:0 0 .5em;
}

p{ margin:0 0 1em; max-width:var(--measure); }
ul{ margin:0 0 1.2em; padding-left:1.3em; max-width:var(--measure); }
li{ margin-bottom:.4em; }
strong{ color:var(--ink); }

.skip-link{
  position:absolute; left:-999px; top:0;
  background:var(--ink); color:var(--paper);
  padding:.6em 1em; z-index:100;
}
.skip-link:focus{ left:1em; top:1em; }

/* ---------- header ---------- */
header.site{
  position:sticky; top:0; z-index:20;
  background:var(--paper);
  border-bottom:1px solid var(--line);
}
.site-bar{
  max-width:1080px; margin:0 auto;
  display:flex; align-items:center; justify-content:space-between;
  gap:1.5rem;
  padding:.9rem 1.5rem;
}
.brand{
  display:flex; align-items:baseline; gap:.6em;
  font-family:var(--font-head);
  text-decoration:none;
  color:var(--ink);
}
.brand strong{
  font-size:1.35rem; font-weight:700; letter-spacing:.01em;
}
.brand span{
  font-size:.85rem; color:var(--ink-soft); font-family:var(--font-body); font-style:italic;
}
nav.site-nav{
  display:flex; flex-wrap:wrap; gap:1.1rem;
  font-family:var(--font-head);
  font-size:.92rem;
}
nav.site-nav a{
  color:var(--ink-soft); text-decoration:none; border-bottom:1px solid transparent;
  padding-bottom:2px;
}
nav.site-nav a:hover{ color:var(--accent); border-color:var(--accent); }
.nav-toggle{
  display:none;
  background:none; border:1px solid var(--line); border-radius:2px;
  font-family:var(--font-head); font-size:.9rem;
  padding:.4em .8em; color:var(--ink); cursor:pointer;
}

/* ---------- hero ---------- */
.hero{
  max-width:1080px; margin:0 auto;
  padding:3.4rem 1.5rem 2.4rem;
  border-bottom:1px solid var(--line);
}
.hero h1{
  font-size:clamp(1.7rem, 3.2vw, 2.5rem);
  max-width:22ch;
  margin-bottom:.7em;
}
.hero .lede{
  font-size:1.08rem;
  color:var(--ink-soft);
  max-width:var(--measure);
}
.hero .lede p:last-child{ margin-bottom:0; }

.credentials{
  margin-top:2.2rem;
  display:flex; flex-wrap:wrap; gap:.7rem;
}
.stamp{
  display:flex; flex-direction:column; gap:.15em;
  border:1px solid var(--ink);
  padding:.55em .85em;
  min-width:11rem;
  background:var(--paper-raised);
}
.stamp .label{
  font-family:var(--font-head);
  font-weight:700; font-size:.85rem;
  color:var(--ink);
}
.stamp .id{
  font-family:var(--font-mono);
  font-size:.72rem;
  color:var(--accent);
  letter-spacing:.02em;
}

/* ---------- section intros ---------- */
.section-intro{
  max-width:1080px; margin:0 auto;
  padding:2.4rem 1.5rem 0;
}
.section-intro h2{
  font-size:1.1rem;
  text-transform:none;
  color:var(--ink-soft);
  border-top:1px solid var(--line);
  padding-top:1.4rem;
  margin-bottom:0;
}

/* ---------- accordion ---------- */
.accordion{
  max-width:1080px; margin:0 auto;
  padding:1rem 1.5rem 3rem;
}
details.acc-item{
  border-bottom:1px solid var(--line);
}
details.acc-item:first-child{ border-top:1px solid var(--line); }

details.acc-item > summary{
  list-style:none;
  cursor:pointer;
  display:flex; align-items:center; gap:1rem;
  padding:1.1rem 0;
  font-family:var(--font-head);
}
details.acc-item > summary::-webkit-details-marker{ display:none; }

summary .tag{
  font-family:var(--font-mono);
  font-size:.78rem;
  color:var(--accent);
  border:1px solid var(--accent-soft);
  padding:.15em .5em;
  min-width:2.6em;
  text-align:center;
  flex:none;
}
summary .heading{
  font-size:1.18rem; font-weight:700; color:var(--ink);
  flex:1;
}
summary .icon{
  flex:none;
  width:1.4em; height:1.4em;
  position:relative;
}
summary .icon::before,
summary .icon::after{
  content:''; position:absolute;
  background:var(--ink);
  top:50%; left:50%;
  transform:translate(-50%,-50%);
}
summary .icon::before{ width:100%; height:2px; }
summary .icon::after{ width:2px; height:100%; transition:transform .18s ease; }
details.acc-item[open] summary .icon::after{ transform:translate(-50%,-50%) rotate(90deg) scaleX(0); }

.acc-body{
  padding:0 0 2rem 3.6rem;
  max-width:calc(var(--measure) + 3.6rem);
}
.acc-body h3{
  font-size:1rem;
  margin-top:1.6em;
}
.acc-body h3:first-child{ margin-top:0; }
.acc-body .note{
  font-family:var(--font-head);
  font-style:normal;
  color:var(--ink-soft);
  font-size:.92rem;
  border-left:3px solid var(--accent-soft);
  padding-left:.8em;
}
.acc-body blockquote{
  margin:1em 0; padding:.8em 1.1em;
  background:var(--paper-raised);
  border-left:3px solid var(--ink);
  font-size:.95rem;
  color:var(--ink-soft);
}
.acc-body blockquote strong{ color:var(--ink); }

.grid-list{
  columns:2; column-gap:2rem;
}
@media (max-width:560px){ .grid-list{ columns:1; } }

/* ---------- kontakt ---------- */
.kontakt{
  max-width:1080px; margin:0 auto;
  padding:2.6rem 1.5rem;
  border-top:1px solid var(--line);
  display:flex; flex-wrap:wrap; gap:3rem;
}
.kontakt h2{ font-size:1.3rem; }
.kontakt address{ font-style:normal; color:var(--ink-soft); line-height:1.7; }
.kontakt address strong{ color:var(--ink); }

/* ---------- impressum ---------- */
.impressum{
  max-width:1080px; margin:0 auto;
  padding:2.6rem 1.5rem 3.5rem;
  border-top:1px solid var(--line);
}
.impressum h2{ font-size:1.3rem; }
.impressum h3{ font-size:.98rem; margin-top:1.6em; }
.impressum .todo{
  display:inline-block;
  background:var(--accent-soft);
  color:#5C2A0C;
  font-family:var(--font-mono);
  font-size:.85rem;
  padding:.1em .4em;
}

/* ---------- footer ---------- */
footer.site{
  border-top:1px solid var(--line);
  padding:1.4rem 1.5rem;
}
footer.site .wrap{
  max-width:1080px; margin:0 auto;
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:.6rem;
  font-size:.85rem; color:var(--ink-soft);
}

/* ---------- responsive nav ---------- */
@media (max-width:760px){
  .nav-toggle{ display:inline-block; }
  nav.site-nav{
    display:none;
    position:absolute; left:0; right:0; top:100%;
    background:var(--paper);
    border-bottom:1px solid var(--line);
    flex-direction:column; gap:0;
    padding:.5rem 1.5rem 1rem;
  }
  nav.site-nav.open{ display:flex; }
  nav.site-nav a{ padding:.6em 0; border-bottom:1px solid var(--line-soft); }
  .acc-body{ padding-left:1.2rem; }
}