/* =========================================================
   Peter Balon — IT-Consultant
   Design: "Schaltplan" — Systemdenken sichtbar gemacht.
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&family=Space+Grotesk:wght@500;600;700&display=swap');

:root{
  --paper:      #E9EDEE;
  --paper-2:    #DFE5E6;
  --panel:      #F5F7F7;
  --ink:        #131C24;
  --ink-soft:   #445062;
  --line:       #B9C5CA;
  --line-soft:  #CFD8DB;
  --amber:      #C4832A;
  --amber-ink:  #7A4E14;
  --teal:       #1E6E67;
  --teal-ink:   #0F433F;
  --danger:     #A8402F;

  --display: 'Space Grotesk', 'IBM Plex Sans', sans-serif;
  --body: 'IBM Plex Sans', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;

  --maxw: 1180px;
  --radius: 2px;
}

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

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; }
}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

/* -------- background: faint blueprint grid -------- */
.gridfield{
  position:fixed; inset:0; z-index:-1; pointer-events:none;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity:0.35;
  -webkit-mask-image: linear-gradient(to bottom, black, black 60%, transparent 100%);
          mask-image: linear-gradient(to bottom, black, black 60%, transparent 100%);
}

a{ color:inherit; }
img{ max-width:100%; display:block; }

.wrap{ max-width:var(--maxw); margin:0 auto; padding:0 32px; }
@media (max-width:640px){ .wrap{ padding:0 20px; } }

/* -------- eyebrow / labels -------- */
.eyebrow{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--teal-ink);
  display:flex; align-items:center; gap:10px;
}
.eyebrow::before{
  content:"";
  width:18px; height:1px;
  background:var(--amber);
  display:inline-block;
}

h1,h2,h3,h4{
  font-family:var(--display);
  font-weight:600;
  color:var(--ink);
  margin:0 0 .4em;
  letter-spacing:-0.01em;
}
h1{ font-size:clamp(2.4rem,5vw,4rem); line-height:1.04; font-weight:700; }
h2{ font-size:clamp(1.5rem,3vw,2.1rem); line-height:1.15; }
h3{ font-size:1.15rem; }
p{ margin:0 0 1em; color:var(--ink-soft); }
strong{ color:var(--ink); }

/* -------- header / nav -------- */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(233,237,238,0.88);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.site-header .wrap{
  display:flex; align-items:center; justify-content:space-between;
  height:76px;
}
.brand{
  display:flex; flex-direction:column; gap:2px;
  text-decoration:none;
}
.brand-mark{
  display:flex; align-items:center; gap:10px;
}
.brand-node{
  width:12px; height:12px; border-radius:50%;
  background:var(--amber);
  box-shadow:0 0 0 3px rgba(196,131,42,0.18);
}
.brand-name{
  font-family:var(--display); font-weight:700; font-size:1.08rem; color:var(--ink);
  letter-spacing:-0.01em;
}
.brand-role{
  font-family:var(--mono); font-size:11px; color:var(--ink-soft);
  letter-spacing:.06em; padding-left:22px;
}

nav.mainnav{ display:flex; gap:2px; align-items:center; }
nav.mainnav a{
  font-family:var(--mono); font-size:13px; letter-spacing:.03em;
  text-decoration:none; color:var(--ink-soft);
  padding:10px 14px; border-radius:var(--radius);
  border-bottom:2px solid transparent;
  transition:color .15s ease, border-color .15s ease;
}
nav.mainnav a:hover{ color:var(--ink); }
nav.mainnav a.active{ color:var(--ink); border-color:var(--amber); }

.navtoggle{
  display:none; background:none; border:1px solid var(--line); border-radius:var(--radius);
  width:40px; height:40px; align-items:center; justify-content:center; cursor:pointer;
}
.navtoggle span, .navtoggle span::before, .navtoggle span::after{
  content:""; display:block; width:18px; height:2px; background:var(--ink); position:relative;
  transition:transform .2s ease, opacity .2s ease;
}
.navtoggle span::before{ position:absolute; top:-6px; }
.navtoggle span::after{ position:absolute; top:6px; }

@media (max-width:860px){
  nav.mainnav{
    position:absolute; top:76px; left:0; right:0;
    background:var(--panel); border-bottom:1px solid var(--line);
    flex-direction:column; align-items:stretch; gap:0;
    max-height:0; overflow:hidden;
    transition:max-height .25s ease;
  }
  nav.mainnav.open{ max-height:400px; }
  nav.mainnav a{ padding:16px 20px; border-bottom:1px solid var(--line-soft); border-left:2px solid transparent; }
  nav.mainnav a.active{ border-left-color:var(--amber); border-bottom-color:var(--line-soft); }
  .navtoggle{ display:flex; }
}

/* -------- hero -------- */
.hero{ padding:96px 0 72px; position:relative; }
.hero-kicker{ margin-bottom:22px; }
.hero h1{ max-width:14ch; }
.hero-role{
  font-family:var(--mono); font-size:15px; color:var(--teal-ink);
  margin:18px 0 28px; letter-spacing:.02em;
}
.hero-lede{ max-width:52ch; font-size:1.08rem; }
.hero-actions{ display:flex; gap:14px; margin-top:32px; flex-wrap:wrap; }

.btn{
  font-family:var(--mono); font-size:13px; letter-spacing:.03em;
  text-decoration:none; padding:13px 22px; border-radius:var(--radius);
  display:inline-flex; align-items:center; gap:8px;
  border:1px solid var(--ink); transition:background .15s ease, color .15s ease, transform .15s ease;
}
.btn-primary{ background:var(--ink); color:var(--paper); }
.btn-primary:hover{ background:var(--teal-ink); border-color:var(--teal-ink); transform:translateY(-1px); }
.btn-ghost{ background:transparent; color:var(--ink); }
.btn-ghost:hover{ background:var(--ink); color:var(--paper); }

/* -------- network diagram -------- */
.diagram-panel{
  margin-top:56px; border:1px solid var(--line); background:var(--panel);
  border-radius:var(--radius); padding:20px 20px 8px;
}
.diagram-panel .cap{
  font-family:var(--mono); font-size:11px; color:var(--ink-soft);
  display:flex; justify-content:space-between; padding-bottom:14px;
  letter-spacing:.05em;
}
svg.netviz{ width:100%; height:auto; display:block; }
.netviz .link{ stroke:var(--line); stroke-width:1; }
.netviz .link-live{ stroke:var(--amber); stroke-width:1.4; stroke-dasharray:4 4; animation:dash 6s linear infinite; }
@keyframes dash{ to{ stroke-dashoffset:-80; } }
.netviz .node-core circle{ fill:var(--ink); }
.netviz .node-core text{ fill:var(--paper); font-family:var(--mono); font-size:10px; }
.netviz .node circle{ fill:var(--panel); stroke:var(--teal); stroke-width:1.4; }
.netviz .node text{ fill:var(--ink); font-family:var(--mono); font-size:9.5px; }
.netviz .node:hover circle{ fill:var(--amber); stroke:var(--amber); }

/* -------- sections -------- */
section{ padding:64px 0; }
section.tight{ padding:40px 0; }
.section-head{ max-width:60ch; margin-bottom:40px; }
.rule{ border:none; border-top:1px solid var(--line); margin:0; }

.pillar-grid{
  display:grid; grid-template-columns:repeat(3,1fr); gap:1px;
  background:var(--line); border:1px solid var(--line);
}
.pillar{
  background:var(--panel); padding:26px 24px; min-height:170px;
  display:flex; flex-direction:column; gap:8px;
}
.pillar .num{ font-family:var(--mono); font-size:12px; color:var(--amber-ink); }
.pillar h3{ font-size:1.02rem; }
.pillar p{ font-size:.92rem; margin:0; }
@media (max-width:860px){ .pillar-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:560px){ .pillar-grid{ grid-template-columns:1fr; } }

/* -------- accordion (skill profile) -------- */
.accordion{ border-top:1px solid var(--line); }
.acc-item{ border-bottom:1px solid var(--line); }
.acc-trigger{
  width:100%; background:none; border:none; cursor:pointer;
  display:flex; align-items:center; justify-content:space-between; gap:20px;
  padding:22px 0; text-align:left; font-family:var(--display); font-weight:600;
  color:var(--ink); font-size:1.05rem;
}
.acc-trigger .tag{
  font-family:var(--mono); font-size:11px; color:var(--teal-ink);
  border:1px solid var(--teal); border-radius:99px; padding:3px 10px;
  white-space:nowrap; margin-right:auto; margin-left:16px;
}
.acc-trigger .idx{ font-family:var(--mono); font-size:12px; color:var(--ink-soft); min-width:2.4em; }
.acc-trigger .plus{
  font-family:var(--mono); font-size:18px; color:var(--amber-ink); transition:transform .2s ease; flex-shrink:0;
}
.acc-item.open .acc-trigger .plus{ transform:rotate(45deg); }
.acc-panel{ max-height:0; overflow:hidden; transition:max-height .3s ease; }
.acc-item.open .acc-panel{ max-height:900px; }
.acc-panel-inner{ padding:0 0 28px; }
.acc-panel-inner ul{ margin:0; padding:0; list-style:none; columns:2; column-gap:36px; }
@media (max-width:700px){ .acc-panel-inner ul{ columns:1; } }
.acc-panel-inner li{
  position:relative; padding:8px 0 8px 18px; font-size:.95rem; color:var(--ink-soft);
  break-inside:avoid; border-top:1px solid var(--line-soft);
}
.acc-panel-inner li:first-child{ border-top:none; }
.acc-panel-inner li::before{
  content:""; position:absolute; left:0; top:16px; width:6px; height:1px; background:var(--amber);
}

/* -------- quick facts / meta strip -------- */
.metastrip{
  display:grid; grid-template-columns:repeat(4,1fr); border:1px solid var(--line); background:var(--panel);
}
.metastrip div{ padding:20px 22px; border-left:1px solid var(--line); }
.metastrip div:first-child{ border-left:none; }
.metastrip .k{ font-family:var(--mono); font-size:11px; color:var(--ink-soft); text-transform:uppercase; letter-spacing:.06em; }
.metastrip .v{ font-family:var(--display); font-weight:600; font-size:1.15rem; margin-top:6px; }
@media (max-width:720px){ .metastrip{ grid-template-columns:1fr 1fr; } .metastrip div:nth-child(3){ border-left:none; } }
@media (max-width:420px){ .metastrip{ grid-template-columns:1fr; } .metastrip div{ border-left:none !important; border-top:1px solid var(--line); } .metastrip div:first-child{ border-top:none; } }

/* -------- lists (languages/education) -------- */
.deflist{ border-top:1px solid var(--line); }
.deflist .row{
  display:grid; grid-template-columns:180px 1fr; gap:24px; padding:18px 0; border-bottom:1px solid var(--line);
}
.deflist .row .k{ font-family:var(--mono); font-size:13px; color:var(--teal-ink); }
.deflist .row .v{ color:var(--ink-soft); }
@media (max-width:560px){ .deflist .row{ grid-template-columns:1fr; gap:4px; } }

.timeline{ border-top:1px solid var(--line); }
.timeline .row{ display:grid; grid-template-columns:180px 1fr; gap:24px; padding:20px 0; border-bottom:1px solid var(--line); }
.timeline .row .when{ font-family:var(--mono); font-size:13px; color:var(--amber-ink); }
@media (max-width:560px){ .timeline .row{ grid-template-columns:1fr; gap:4px; } }

.tagcloud{ display:flex; flex-wrap:wrap; gap:8px; }
.tagcloud span{
  font-family:var(--mono); font-size:12px; color:var(--ink-soft);
  border:1px solid var(--line); padding:6px 12px; border-radius:99px;
}

/* -------- cards (industries) -------- */
.card-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.card{ background:var(--panel); padding:24px; }
.card h3{ font-size:1rem; margin-bottom:8px; }
.card p{ font-size:.92rem; margin:0; }
@media (max-width:700px){ .card-grid{ grid-template-columns:1fr; } }

/* -------- CTA band -------- */
.ctaband{
  background:var(--ink); color:var(--paper); padding:64px 0; margin-top:20px;
}
.ctaband h2{ color:var(--paper); }
.ctaband p{ color:#B9C5CA; max-width:52ch; }
.ctaband .btn-primary{ background:var(--amber); border-color:var(--amber); color:var(--ink); }
.ctaband .btn-primary:hover{ background:var(--paper); border-color:var(--paper); color:var(--ink); }
.ctaband .btn-ghost{ color:var(--paper); border-color:#3A4655; }
.ctaband .btn-ghost:hover{ background:var(--paper); color:var(--ink); }

/* -------- footer -------- */
footer.site-footer{ border-top:1px solid var(--line); padding:48px 0 32px; margin-top:40px; }
.footer-grid{ display:flex; justify-content:space-between; gap:32px; flex-wrap:wrap; }
.footer-grid h4{ font-size:.85rem; font-family:var(--mono); text-transform:uppercase; letter-spacing:.06em; color:var(--ink-soft); margin-bottom:14px; }
.footer-links{ display:flex; flex-direction:column; gap:8px; }
.footer-links a{ text-decoration:none; font-size:.92rem; color:var(--ink); }
.footer-links a:hover{ color:var(--teal-ink); }
.footer-bottom{
  margin-top:40px; padding-top:20px; border-top:1px solid var(--line-soft);
  display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap;
  font-family:var(--mono); font-size:11.5px; color:var(--ink-soft);
}

/* -------- page header (inner pages) -------- */
.pagehead{ padding:64px 0 40px; }
.pagehead .eyebrow{ margin-bottom:18px; }
.pagehead p{ max-width:56ch; font-size:1.05rem; }

/* -------- contact page -------- */
.contact-grid{ display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--line); border:1px solid var(--line); }
.contact-panel{ background:var(--panel); padding:36px; }
@media (max-width:800px){ .contact-grid{ grid-template-columns:1fr; } }

.field{ margin-bottom:20px; }
.field label{ display:block; font-family:var(--mono); font-size:12px; color:var(--ink-soft); margin-bottom:8px; letter-spacing:.03em; }
.field input, .field textarea{
  width:100%; background:var(--paper); border:1px solid var(--line); border-radius:var(--radius);
  padding:12px 14px; font-family:var(--body); font-size:.95rem; color:var(--ink);
}
.field input:focus, .field textarea:focus{ outline:2px solid var(--amber); outline-offset:1px; border-color:var(--amber); }
.field textarea{ min-height:130px; resize:vertical; }
.formnote{ font-family:var(--mono); font-size:12px; color:var(--ink-soft); margin-top:12px; }

.contactline{ display:flex; align-items:baseline; gap:14px; padding:14px 0; border-bottom:1px solid var(--line-soft); }
.contactline:first-of-type{ border-top:1px solid var(--line-soft); }
.contactline .k{ font-family:var(--mono); font-size:12px; color:var(--teal-ink); min-width:70px; }
.contactline a{ text-decoration:none; }
.contactline a:hover{ color:var(--teal-ink); }

/* -------- legal pages -------- */
.legal{ max-width:74ch; }
.legal h2{ margin-top:2em; font-size:1.2rem; }
.legal h3{ margin-top:1.6em; font-size:1rem; }
.legal p, .legal li{ color:var(--ink-soft); font-size:.96rem; }
.legal ul{ padding-left:1.2em; }

/* -------- focus visibility -------- */
a:focus-visible, button:focus-visible{ outline:2px solid var(--amber); outline-offset:2px; }

/* skip link */
.skip-link{
  position:absolute; left:-999px; top:0; background:var(--ink); color:var(--paper);
  padding:10px 16px; z-index:100; font-family:var(--mono); font-size:13px;
}
.skip-link:focus{ left:16px; top:16px; }