/* =========================================================
   Wassilij Klug — Systemintegrator
   Persönliche Visitenkarten-Webseite
   ========================================================= */

:root{
  --bg:#070b12;
  --bg-2:#0a0f19;
  --surface:#0e1624;
  --surface-2:#131e30;
  --border:rgba(255,255,255,.08);
  --border-2:rgba(255,255,255,.14);
  --text:#eaf1fb;
  --text-2:#9db0cc;
  --text-3:#63748f;
  --violet:#8b5cf6;
  --cyan:#22d3ee;
  --grad:linear-gradient(135deg,#8b5cf6 0%,#22d3ee 100%);
  --grad-soft:linear-gradient(135deg,rgba(139,92,246,.18),rgba(34,211,238,.14));
  --ok:#34d399;
  --radius:18px;
  --radius-sm:12px;
  --radius-lg:26px;
  --shadow:0 30px 70px -30px rgba(0,0,0,.85);
  --container:1160px;
  --header-h:72px;
}

/* ---------- Reset & Base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{
  margin:0;
  font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  background:var(--bg);color:var(--text);
  line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
h1,h2,h3{font-family:'Sora','Inter',sans-serif;line-height:1.15;letter-spacing:-.02em;margin:0 0 .5em;font-weight:700}
h1{font-size:clamp(2.05rem,4.8vw,3.4rem);font-weight:800}
h2{font-size:clamp(1.55rem,3.2vw,2.3rem)}
h3{font-size:1.08rem;font-weight:600}
p{margin:0 0 1em}
a{color:inherit;text-decoration:none;transition:color .2s}
img{max-width:100%;display:block}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;cursor:pointer}

.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:22px}
.skip{position:absolute;left:-9999px;top:0;background:var(--violet);color:#fff;padding:10px 16px;z-index:999;border-radius:0 0 8px 0}
.skip:focus{left:0}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.dot{color:var(--cyan)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-weight:600;font-size:.95rem;
  padding:12px 20px;border-radius:12px;border:1px solid transparent;
  transition:transform .22s,box-shadow .22s,background .22s,border-color .22s;
  white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#08111c;box-shadow:0 12px 34px -12px rgba(139,92,246,.7)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 40px -14px rgba(34,211,238,.7)}
.btn-ghost{background:transparent;border-color:var(--border-2);color:var(--text)}
.btn-ghost:hover{background:rgba(255,255,255,.06);border-color:var(--cyan)}
.btn-lg{padding:15px 26px;font-size:1rem}
.btn-sm{padding:9px 15px;font-size:.86rem}
.btn-block{width:100%}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(7,11,18,.72);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid transparent;
  transition:background .3s,border-color .3s;
}
.site-header.scrolled{background:rgba(7,11,18,.92);border-bottom-color:var(--border)}
.header-inner{display:flex;align-items:center;gap:14px;height:var(--header-h)}

.brand{display:flex;align-items:center;gap:11px;font-weight:700;font-size:1.05rem;letter-spacing:-.02em}
.brand-mark{
  width:38px;height:38px;border-radius:11px;
  display:grid;place-items:center;flex-shrink:0;
  background:var(--grad);color:#08111c;
  font-family:'Sora',sans-serif;font-weight:800;font-size:.9rem;letter-spacing:.02em;
}

.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{padding:9px 14px;border-radius:9px;font-size:.92rem;font-weight:500;color:var(--text-2)}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.05)}
.nav-cta{margin-left:10px}

/* ---------- Language switch ---------- */
.lang-switch{
  display:flex;gap:2px;padding:3px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--border);border-radius:9px;
}
.lang-switch button{
  background:none;border:0;color:var(--text-3);
  font:inherit;font-size:.74rem;font-weight:700;letter-spacing:.05em;
  padding:6px 9px;border-radius:6px;transition:.2s;
}
.lang-switch button.active{background:var(--grad);color:#08111c}
.lang-switch button:hover:not(.active){color:var(--text)}

.nav-toggle{
  display:none;margin-left:auto;
  width:42px;height:42px;border-radius:10px;
  background:none;border:1px solid var(--border);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{width:20px;height:2px;background:var(--text);border-radius:2px;transition:.25s}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{position:relative;padding:88px 0 76px;overflow:hidden}
.hero-bg{
  position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(900px 520px at 78% -8%,rgba(139,92,246,.22),transparent 62%),
    radial-gradient(800px 500px at 8% 8%,rgba(34,211,238,.16),transparent 60%);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:58px 58px;
  mask-image:radial-gradient(ellipse at 50% 35%,#000 25%,transparent 72%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 35%,#000 25%,transparent 72%);
}

.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}

.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:.76rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  color:#c4b5fd;
  background:rgba(139,92,246,.12);
  border:1px solid rgba(139,92,246,.28);
  padding:7px 14px;border-radius:100px;margin-bottom:22px;
}
.pulse{width:8px;height:8px;border-radius:50%;background:var(--cyan);animation:pulse 2s infinite;flex-shrink:0}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(34,211,238,.55)}
  70%{box-shadow:0 0 0 10px rgba(34,211,238,0)}
  100%{box-shadow:0 0 0 0 rgba(34,211,238,0)}
}

.hero-lead{font-size:1.1rem;color:var(--text-2);max-width:56ch}

.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0 30px}

.hero-chips{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:.9rem;color:var(--text-2)}
.hero-chips li{display:flex;align-items:center;gap:8px}
.dot-ok{
  width:7px;height:7px;border-radius:50%;background:var(--ok);
  box-shadow:0 0 0 3px rgba(52,211,153,.18);flex-shrink:0;
}

/* ---------- ID Card ---------- */
.hero-visual{perspective:1100px}
.id-card{
  position:relative;
  background:linear-gradient(160deg,var(--surface-2) 0%,var(--surface) 55%,#0b131f 100%);
  border:1px solid var(--border-2);
  border-radius:var(--radius-lg);
  padding:26px;
  box-shadow:var(--shadow);
  transform-style:preserve-3d;
  transition:transform .35s cubic-bezier(.2,.8,.2,1);
  overflow:hidden;
}
.id-card-glow{
  position:absolute;inset:-1px;border-radius:inherit;padding:1px;
  background:linear-gradient(140deg,rgba(139,92,246,.6),transparent 40%,transparent 60%,rgba(34,211,238,.55));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  pointer-events:none;
}
.id-top{display:flex;align-items:center;gap:14px;padding-bottom:20px;border-bottom:1px solid var(--border)}
.avatar{
  width:58px;height:58px;border-radius:16px;flex-shrink:0;
  display:grid;place-items:center;
  background:var(--grad);color:#08111c;
  font-family:'Sora',sans-serif;font-weight:800;font-size:1.15rem;
  box-shadow:0 10px 24px -10px rgba(139,92,246,.8);
}
.id-id{display:flex;flex-direction:column;min-width:0}
.id-id strong{font-family:'Sora',sans-serif;font-weight:700;font-size:1.08rem;letter-spacing:-.01em}
.id-id span{font-size:.84rem;color:var(--text-2)}
.status{
  margin-left:auto;display:flex;align-items:center;gap:7px;
  font-size:.7rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;
  color:var(--ok);background:rgba(52,211,153,.1);
  padding:5px 10px;border-radius:100px;border:1px solid rgba(52,211,153,.22);
}

.id-body{padding:18px 0}
.id-body li{display:flex;justify-content:space-between;align-items:baseline;gap:14px;padding:9px 0;font-size:.9rem}
.id-body li span{color:var(--text-3);font-size:.82rem}
.id-body li strong{font-weight:600;color:var(--text);text-align:right}

.id-foot{display:flex;gap:10px;padding-top:18px;border-top:1px solid var(--border)}
.id-btn{
  flex:1;display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 14px;border-radius:11px;font-size:.84rem;font-weight:600;
  background:var(--grad);color:#08111c;border:0;
  transition:transform .2s,box-shadow .2s,background .2s,border-color .2s;
}
.id-btn:hover{transform:translateY(-2px);box-shadow:0 14px 30px -12px rgba(34,211,238,.65)}
.id-btn.ghost{background:transparent;border:1px solid var(--border-2);color:var(--text)}
.id-btn.ghost:hover{background:rgba(255,255,255,.06);border-color:var(--cyan)}

/* ---------- Stats ---------- */
.stats-band{background:var(--bg-2);border-block:1px solid var(--border);padding:44px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;text-align:center}
.stat-num{
  display:block;font-family:'Sora',sans-serif;font-weight:800;
  font-size:clamp(1.7rem,3.4vw,2.4rem);
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat-label{font-size:.85rem;color:var(--text-2)}

/* ---------- Sections ---------- */
.section{padding:92px 0}
.section-alt{background:var(--bg-2);border-block:1px solid var(--border)}
.section-head{max-width:720px;margin:0 auto 52px;text-align:center}
.section-sub{color:var(--text-2);font-size:1.03rem}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:start}
.about-text .eyebrow{margin-bottom:18px}
.about-text p{color:var(--text-2)}
.about-quote{
  margin-top:26px;padding:18px 22px;
  border-left:3px solid var(--cyan);
  background:var(--grad-soft);
  border-radius:0 12px 12px 0;
  font-style:italic;color:var(--text)!important;font-size:.98rem;
}

.timeline{position:relative;padding-left:8px}
.tl-item{position:relative;display:grid;grid-template-columns:74px 1fr;gap:18px;padding-bottom:30px}
.tl-item::before{
  content:"";position:absolute;left:80px;top:26px;bottom:-4px;width:1px;
  background:linear-gradient(to bottom,var(--border-2),transparent);
}
.tl-item:last-child::before{display:none}
.tl-year{
  font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  color:var(--cyan);padding-top:4px;text-align:right;
}
.tl-body{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:20px 22px;
  transition:border-color .25s,transform .25s;
}
.tl-item:hover .tl-body{border-color:var(--border-2);transform:translateX(4px)}
.tl-body h3{margin-bottom:.35em;font-size:1rem}
.tl-body p{margin:0;color:var(--text-2);font-size:.9rem}

/* ---------- Grid & Cards ---------- */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

.card{
  position:relative;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:26px;
  transition:transform .28s,border-color .28s,box-shadow .28s;
  display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-5px);border-color:var(--border-2);box-shadow:var(--shadow)}
.card h3{margin-bottom:.55em}
.card p{margin:0;color:var(--text-2);font-size:.93rem}
.card-icon{
  display:grid;place-items:center;width:48px;height:48px;
  border-radius:13px;margin-bottom:18px;
  background:rgba(139,92,246,.13);
  border:1px solid rgba(139,92,246,.25);
  color:#c4b5fd;
}
.card-icon svg{width:24px;height:24px}
.card-tag{
  margin-top:auto;padding-top:16px;
  font-size:.74rem;font-weight:600;letter-spacing:.05em;
  color:var(--text-3);text-transform:uppercase;
}
.card-feature{
  background:linear-gradient(165deg,rgba(139,92,246,.14),rgba(34,211,238,.07) 60%,var(--surface));
  border-color:rgba(139,92,246,.32);
}
.card-feature .card-icon{background:rgba(34,211,238,.14);border-color:rgba(34,211,238,.3);color:#a5f3fc}
.card-badge{
  position:absolute;top:-11px;right:22px;
  font-size:.66rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;
  padding:5px 12px;border-radius:100px;
  background:var(--grad);color:#08111c;
}

/* ---------- Skills ---------- */
.skills-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.skill-group{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:24px;
  transition:border-color .25s,transform .25s;
}
.skill-group:hover{border-color:var(--border-2);transform:translateY(-3px)}
.skill-group h3{display:flex;align-items:center;gap:10px;font-size:.94rem;margin-bottom:16px;color:var(--text)}
.skill-dot{width:8px;height:8px;border-radius:50%;background:var(--grad);flex-shrink:0}
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tags li{
  font-size:.8rem;padding:6px 12px;border-radius:100px;
  background:rgba(255,255,255,.045);
  border:1px solid var(--border);color:var(--text-2);
  transition:background .2s,color .2s,border-color .2s;
}
.tags li:hover{background:rgba(139,92,246,.15);color:var(--text);border-color:rgba(139,92,246,.35)}

/* ---------- Why cards ---------- */
.why-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:26px;
  transition:transform .28s,border-color .28s;
}
.why-card:hover{transform:translateY(-5px);border-color:var(--border-2)}
.why-num{
  display:inline-block;font-family:'Sora',sans-serif;font-weight:800;
  font-size:.9rem;letter-spacing:.06em;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  margin-bottom:12px;
}
.why-card h3{font-size:.98rem;margin-bottom:.5em}
.why-card p{margin:0;color:var(--text-2);font-size:.88rem}

/* ---------- Projects ---------- */
.projects-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.project-card{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);overflow:hidden;
  transition:transform .28s,border-color .28s,box-shadow .28s;
}
.project-card:hover{transform:translateY(-5px);border-color:var(--border-2);box-shadow:var(--shadow)}
.project-head{
  position:relative;display:flex;align-items:center;justify-content:space-between;
  padding:22px 24px;
  background:linear-gradient(155deg,rgba(139,92,246,.16),rgba(34,211,238,.08) 60%,transparent);
  border-bottom:1px solid var(--border);
}
.project-icon{
  width:44px;height:44px;border-radius:12px;
  display:grid;place-items:center;
  background:rgba(34,211,238,.14);
  border:1px solid rgba(34,211,238,.3);
  color:#a5f3fc;
}
.project-icon svg{width:22px;height:22px}
.project-cat{
  font-size:.7rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;
  color:#c4b5fd;
  background:rgba(139,92,246,.14);
  border:1px solid rgba(139,92,246,.28);
  padding:4px 10px;border-radius:100px;
}
.project-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1}
.project-body h3{margin-bottom:.5em;font-size:1.02rem}
.project-body p{margin:0 0 16px;color:var(--text-2);font-size:.9rem}
.project-url{
  display:inline-flex;align-items:center;gap:6px;margin-top:auto;
  font-size:.85rem;font-weight:600;color:var(--cyan);
  padding-top:14px;border-top:1px solid var(--border);
  transition:gap .2s;
}
.project-url:hover{gap:10px}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:start}
.contact-intro .eyebrow{margin-bottom:18px}
.contact-intro p{color:var(--text-2)}

.contact-list{display:flex;flex-direction:column;gap:16px;margin:30px 0}
.contact-list li{display:flex;gap:14px;align-items:center}
.ci-icon{
  width:44px;height:44px;flex-shrink:0;border-radius:12px;
  display:grid;place-items:center;
  background:var(--surface);border:1px solid var(--border);
  color:var(--cyan);
}
.ci-icon svg{width:20px;height:20px}
.ci-label{display:block;font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--text-3);margin-bottom:1px}
.ci-value{font-size:.95rem;font-weight:600;color:var(--text);cursor:pointer}
a.ci-value:hover{color:var(--cyan)}
.ci-value.copied::after{content:" ✓";font-size:.8rem;color:var(--ok);font-weight:500}

.contact-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- Form ---------- */
.contact-form-wrap{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:32px;
  box-shadow:var(--shadow);
}
.form{display:grid;gap:18px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:7px}
.field label{font-size:.85rem;font-weight:600;color:var(--text-2)}
.field .opt{font-weight:400;color:var(--text-3)}
.field input,.field select,.field textarea{
  background:var(--bg-2);
  border:1px solid var(--border);border-radius:11px;
  padding:12px 14px;color:var(--text);font:inherit;font-size:.94rem;
  transition:border-color .2s,box-shadow .2s;width:100%;
}
.field select{
  appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none'%3E%3Cpath d='M6 9l6 6 6-6' stroke='%239db0cc' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;padding-right:40px;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--violet);
  box-shadow:0 0 0 3px rgba(139,92,246,.2);
}
.field textarea{resize:vertical;min-height:130px;font-family:inherit}
.field .error{font-size:.78rem;color:#fca5a5;display:none}
.field.invalid input,.field.invalid textarea,.field.invalid select{border-color:#ef4444}
.field.invalid .error{display:block}

.form-note{font-size:.79rem;color:var(--text-3);margin:0;text-align:center}
.form-success{
  display:none;
  background:rgba(52,211,153,.1);border:1px solid rgba(52,211,153,.3);
  color:#a7f3d0;padding:14px 18px;border-radius:11px;
  font-size:.9rem;margin-bottom:20px;
}
.form-success.show{display:block}

/* ---------- Footer ---------- */
.site-footer{background:var(--bg-2);border-top:1px solid var(--border);padding:44px 0}
.footer-inner{display:flex;align-items:center;gap:28px;flex-wrap:wrap}
.footer-brand{display:flex;align-items:center;gap:13px}
.footer-brand strong{display:block;font-family:'Sora',sans-serif;font-size:.98rem}
.footer-brand span:not(.brand-mark){font-size:.83rem;color:var(--text-3)}
.footer-nav{display:flex;gap:22px;margin-left:auto;flex-wrap:wrap}
.footer-nav a{font-size:.87rem;color:var(--text-2)}
.footer-nav a:hover{color:var(--cyan)}
.footer-copy{
  font-size:.82rem;color:var(--text-3);margin:0;
  flex-basis:100%;padding-top:20px;border-top:1px solid var(--border);
}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .65s ease,transform .65s ease}
.reveal.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .pulse{animation:none}
  .id-card{transition:none}
}

/* ---------- Responsive ---------- */
@media (max-width:1000px){
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .hero-visual{max-width:440px;margin-inline:auto;width:100%}
  .about-grid{grid-template-columns:1fr;gap:44px}
  .contact-grid{grid-template-columns:1fr;gap:44px}
  .grid-3,.projects-grid{grid-template-columns:repeat(2,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .skills-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:34px}
}

@media (max-width:720px){
  .nav{
    position:fixed;top:var(--header-h);left:0;right:0;
    background:var(--bg-2);border-bottom:1px solid var(--border);
    flex-direction:column;align-items:stretch;gap:4px;
    padding:16px 22px 24px;
    transform:translateY(-130%);transition:transform .3s;
    margin:0;max-height:calc(100vh - var(--header-h));overflow-y:auto;
  }
  .nav.open{transform:translateY(0)}
  .nav-toggle{display:flex}
  .lang-switch{order:-1;margin-left:auto}
  .header-inner{gap:10px}
  .nav-cta{margin:10px 0 0}
  .grid-3,.grid-4,.skills-grid,.projects-grid,.form-row{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr;gap:26px}
  .section{padding:64px 0}
  .hero{padding:60px 0 56px}
  .contact-form-wrap{padding:24px}
  .tl-item{grid-template-columns:60px 1fr;gap:14px}
  .tl-item::before{left:66px}
  .footer-nav{margin-left:0;flex-basis:100%}
}