:root{
  --paper: #F0F0EE;
  --surface: #FFFFFF;
  --surface-sunken: #E8E7E4;
  --ink: #202225;
  --ink-soft: #5B5E63;
  --ink-faint: #8B8D91;
  --line: #DCDBD7;
  --accent: #4C6A78;
  --accent-soft: #DDE5E7;
  --shadow: rgba(32,34,37,0.07);
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'IBM Plex Sans', sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

a{ color:inherit; }
:focus-visible{ outline:2px solid var(--accent); outline-offset:3px; }

.wrap{
  max-width:1120px;
  margin:0 auto;
  padding-left:clamp(20px, 5vw, 56px);
  padding-right:clamp(20px, 5vw, 56px);
}

.mono{
  font-family:'IBM Plex Mono', monospace;
}

/* ===== Kopfzeile ===== */
header{
  position:sticky;
  top:0;
  z-index:10;
  background:rgba(240,240,238,0.9);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}
.head-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  row-gap:10px;
  padding-top:18px;
  padding-bottom:18px;
}
.brand{
  display:flex;
  align-items:baseline;
  gap:10px;
}
.brand-mark{
  font-family:'IBM Plex Mono', monospace;
  font-size:13px;
  color:var(--accent);
  background:var(--accent-soft);
  padding:2px 7px;
  border-radius:3px;
}
.brand-name{
  font-family:'Spectral', serif;
  font-weight:600;
  font-size:18px;
  letter-spacing:-0.01em;
}
.head-controls{
  display:flex;
  align-items:center;
  gap:clamp(16px, 3vw, 30px);
  flex-wrap:wrap;
  row-gap:10px;
}
nav{
  display:flex;
  gap:clamp(16px, 3vw, 30px);
  font-size:14px;
}
nav a{
  text-decoration:none;
  color:var(--ink-soft);
  padding-bottom:2px;
  border-bottom:1px solid transparent;
  transition:color .15s ease, border-color .15s ease;
}
nav a:hover{ color:var(--ink); border-color:var(--accent); }

.lang-switch{ display:flex; gap:4px; }
.lang-btn{
  font-family:'IBM Plex Mono', monospace;
  font-size:11px;
  letter-spacing:0.04em;
  padding:4px 8px;
  border:1px solid var(--line);
  border-radius:4px;
  background:transparent;
  color:var(--ink-soft);
  cursor:pointer;
  transition:background-color .15s ease, border-color .15s ease, color .15s ease;
}
.lang-btn:hover{ border-color:var(--accent); color:var(--ink); }
.lang-btn.is-active{ background:var(--accent); border-color:var(--accent); color:#fff; }

@media (max-width:720px){
  nav{ width:100%; gap:20px; }
}

/* ===== Hero ===== */
.hero{
  padding-top:clamp(24px, 4vw, 44px);
  padding-bottom:clamp(20px, 3vw, 32px);
  display:grid;
  grid-template-columns:1.15fr 1fr;
  gap:clamp(28px, 5vw, 56px);
  align-items:center;
}
.hero-byline{
  display:flex;
  align-items:center;
  gap:14px;
  margin-bottom:22px;
}
.avatar{
  width:56px; height:56px;
  border-radius:50%;
  object-fit:cover;
  border:1px solid var(--line);
  background:var(--surface-sunken);
  flex-shrink:0;
}
.hero-byline .eyebrow{ margin:0; }
.hero-byline .eyebrow::before{ background:#66BB6A; }

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:'IBM Plex Mono', monospace;
  font-size:12px;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--ink-faint);
  margin:0 0 18px;
}
.eyebrow::before{
  content:"";
  width:7px; height:7px;
  border-radius:50%;
  background:var(--accent);
  display:inline-block;
}
.hero h2{
  font-family:'Spectral', serif;
  font-weight:450;
  font-size:clamp(20px, 3.4vw, 33px);
  line-height:1.15;
  letter-spacing:-0.01em;
  margin:0 0 20px;
}
.hero h2 .accent{ color:var(--accent); font-style:italic; font-weight:370; }
.hero p.lead{
  font-size:16.5px;
  color:var(--ink-soft);
  max-width:52ch;
  margin:0 0 28px;
}
.hero p.lead .lead-focus{
  display:block;
  margin-top:1.6em;
  font-style:italic;
  font-weight:400;
}
.hero-actions{ display:flex; gap:14px; flex-wrap:wrap; }
.btn{
  display:inline-block;
  font-size:14px;
  padding:11px 20px;
  border-radius:6px;
  text-decoration:none;
  border:1px solid var(--ink);
}
.btn-solid{ background:var(--ink); color:var(--paper); }
.btn-solid:hover{ background:var(--accent); border-color:var(--accent); }
.btn-ghost{ border-color:var(--line); color:var(--ink); }
.btn-ghost:hover{ border-color:var(--ink); }

/* Hero-Panel: wie ein kleines Code-/Profil-Snippet */
.file-card{
  width:100%;
  max-width:280px;
  justify-self:end;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:10px;
  box-shadow:0 18px 40px var(--shadow);
  padding:22px 20px;
  position:relative;
}
.file-card::before{
  content:attr(data-label);
  position:absolute;
  top:-13px; left:18px;
  background:var(--surface-sunken);
  border:1px solid var(--line);
  border-radius:4px;
  color:var(--ink-soft);
  font-family:'IBM Plex Mono', monospace;
  font-size:10px;
  letter-spacing:0.1em;
  padding:4px 10px;
}
.file-card dl{ margin:14px 0 0; }
.file-card dt{
  font-family:'IBM Plex Mono', monospace;
  font-size:10.5px;
  text-transform:uppercase;
  letter-spacing:0.08em;
  color:var(--ink-soft);
  margin-top:12px;
}
.file-card dt:first-child{ margin-top:0; }
.file-card dd{
  margin:2px 0 0;
  font-family:'Spectral', serif;
  font-weight:500;
  font-size:18px;
}

/* ===== Abschnittstitel ===== */
.section{ padding-top:clamp(44px, 7vw, 72px); padding-bottom:clamp(44px, 7vw, 72px); }
#leistungen{ padding-top:clamp(22px, 3.5vw, 36px); padding-bottom:clamp(22px, 3.5vw, 36px); }
#erfahrung{ padding-top:clamp(22px, 3.5vw, 36px); }
.section-head{
  max-width:60ch;
  margin-bottom:36px;
}
.section-head .eyebrow{ margin-bottom:12px; }
.section-head h2{
  font-family:'Spectral', serif;
  font-weight:600;
  font-size:clamp(24px, 3vw, 30px);
  margin:0 0 10px;
  letter-spacing:-0.01em;
}
.section-head p{
  color:var(--ink-soft);
  margin:0;
  font-size:15px;
}

/* ===== Karten: Leistungen ===== */
.cards{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:24px;
}
.card{
  background:transparent;
  border-radius:10px;
  perspective:1400px;
  cursor:pointer;
}
.card-inner{
  position:relative;
  min-height:280px;
  transition:transform .6s cubic-bezier(.2,.8,.2,1);
  transform-style:preserve-3d;
}
.card.is-flipped .card-inner{ transform:rotateY(180deg); }

.card-face{
  position:absolute;
  inset:0;
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:10px;
  overflow:hidden;
  backface-visibility:hidden;
  -webkit-backface-visibility:hidden;
  transform:translateZ(0);
  will-change:transform;
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:hover .card-face{
  box-shadow:0 14px 28px var(--shadow);
  border-color:#c9c8c4;
}
.card-face.back{ transform:rotateY(180deg) translateZ(0); }

.card-hint{
  margin-top:auto;
  flex-shrink:0;
  padding:12px 16px 14px;
  font-family:'IBM Plex Mono', monospace;
  font-size:11px;
  color:var(--ink-faint);
  border-top:1px solid var(--line);
}
.card-tab{ flex-shrink:0; }
.card-body{ flex:1 1 auto; min-height:0; overflow-y:auto; }
.card-face.back ul{
  margin:0;
  padding-left:18px;
  color:var(--ink-soft);
  font-size:14px;
}
.card-face.back li{ margin-bottom:6px; }

@media (prefers-reduced-motion: reduce){
  .card-inner{ transition:none; }
  /* Ohne 3D-Drehung: Rückseite einfach ein-/ausblenden */
  .card-inner{ transform-style:flat; position:relative; }
  .card-face.back{ transform:none; display:none; }
  .card.is-flipped .card-face.front{ display:none; }
  .card.is-flipped .card-face.back{ display:flex; }
}
.card-tab{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:11px 16px;
  background:var(--surface-sunken);
  border-bottom:1px solid var(--line);
}
.card-tab .filename{
  font-family:'IBM Plex Mono', monospace;
  font-size:12.5px;
  color:var(--ink-soft);
}
.card-tab .filename .ext{ color:var(--accent); }
.card-dots{ display:flex; gap:4px; }
.card-dots span{
  width:5px; height:5px;
  border-radius:50%;
  background:var(--ink-faint);
  opacity:0.5;
}
.card-body{ padding:22px 20px 24px; }
.card-body h3{
  font-family:'Spectral', serif;
  font-weight:600;
  font-size:19px;
  margin:0 0 10px;
}
.card-body p{
  color:var(--ink-soft);
  font-size:14.5px;
  margin:0 0 16px;
}
.card-tags{ display:flex; flex-wrap:wrap; gap:6px; }
.card-tags span{
  font-family:'IBM Plex Mono', monospace;
  font-size:11px;
  color:var(--accent);
  background:var(--accent-soft);
  padding:3px 8px;
  border-radius:4px;
}

@media (max-width:860px){
  .hero{ grid-template-columns:1fr; }
  .cards{ grid-template-columns:1fr; }
}

/* ===== Erfahrung / Skills ===== */
.skills{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.skills span{
  font-family:'IBM Plex Mono', monospace;
  font-size:13px;
  padding:7px 13px;
  border:1px solid var(--line);
  border-radius:999px;
  color:var(--ink-soft);
  background:var(--surface);
}

/* ===== Fusszeile ===== */
footer{
  border-top:1px solid var(--line);
  margin-top:24px;
  background:var(--surface-sunken);
}
.foot-inner{
  padding-top:40px;
  padding-bottom:26px;
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr;
  gap:20px;
}
@media (max-width:640px){
  .foot-inner{ grid-template-columns:1fr; }
}
.foot-inner h4{
  font-family:'IBM Plex Mono', monospace;
  font-size:11px;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--ink-faint);
  margin:0 0 10px;
}
.foot-links a{
  display:block;
  text-decoration:none;
  color:var(--ink-soft);
  font-size:14px;
  line-height:2;
}
.foot-links a:hover{ color:var(--accent); }
.foot-bottom{
  border-top:1px solid var(--line);
  padding-top:16px;
  padding-bottom:20px;
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:8px;
  font-family:'IBM Plex Mono', monospace;
  font-size:11.5px;
  color:var(--ink-faint);
}
.foot-bottom a{ text-decoration:none; color:var(--ink-faint); }
.foot-bottom a:hover{ color:var(--accent); }

/* ===== Impressum-Modal ===== */
dialog.modal{
  border:none;
  border-radius:10px;
  padding:0;
  max-width:440px;
  width:calc(100% - 40px);
  background:var(--surface);
  box-shadow:0 24px 60px var(--shadow);
}
dialog.modal::backdrop{
  background:rgba(32,34,37,0.45);
  backdrop-filter:blur(2px);
}
.modal-tab{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:11px 16px;
  background:var(--surface-sunken);
  border-bottom:1px solid var(--line);
  border-radius:10px 10px 0 0;
}
.modal-tab .filename{
  font-family:'IBM Plex Mono', monospace;
  font-size:12.5px;
  color:var(--ink-soft);
}
.modal-tab .filename .ext{ color:var(--accent); }
.modal-close{
  border:none;
  background:transparent;
  cursor:pointer;
  font-family:'IBM Plex Mono', monospace;
  font-size:18px;
  line-height:1;
  color:var(--ink-faint);
  padding:2px 6px;
}
.modal-close:hover{ color:var(--ink); }
.modal-body{
  padding:22px 24px 26px;
  font-size:14px;
  color:var(--ink-soft);
  line-height:1.7;
  max-height:70vh;
  overflow-y:auto;
}
.modal-body h4{
  font-family:'IBM Plex Mono', monospace;
  font-size:11px;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--ink-faint);
  margin:20px 0 6px;
}
.modal-body h4:first-child{ margin-top:0; }
.modal-body p{ margin:0 0 4px; }
.modal-body a{ color:var(--accent); text-decoration:none; }
.modal-body a:hover{ text-decoration:underline; }

@media (prefers-reduced-motion: reduce){
  *{ transition:none !important; }
}