:root {
  --bg: #0D0B1A;
  --fg: #F5F5FA;
  --muted: #B8AEDD;
  --brand: #6C46FF;
  --brand-2: #A03AFF;
  --highlight: #E14CFF;
  --card: #181427;
  --border: #2D2645;
  --shadow: 0 10px 30px rgba(0,0,0,.5);
}

:root.light {
  --bg: #FAF9FF;
  --fg: #201A3D;
  --muted: #605980;
  --brand: #6C46FF;
  --brand-2: #A03AFF;
  --highlight: #D43AFF;
  --card: #FFFFFF;
  --border: #E0DAF5;
  --shadow: 0 10px 30px rgba(0,0,0,.08);
}


*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:Inter,system-ui,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.6}
.skip-link{position:absolute;left:-9999px;z-index:999;padding:.5rem 1rem;background:var(--brand);color:white;text-decoration:none;border-radius:4px}
.skip-link:focus{left:1rem;top:1rem}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:all .3s ease}
h1,h2,h3{line-height:1.2;margin:0 0 .5rem}
h1{font-size:clamp(2rem,4vw,3rem)}
h2{font-size:clamp(1.4rem,3vw,2rem)}
.section{padding:4rem 1rem;max-width:1100px;margin:0 auto;opacity:0;transform:translateY(30px);transition:opacity .8s ease, transform .8s ease}
.section.visible{opacity:1;transform:translateY(0)}
.section-head{display:flex;justify-content:space-between;gap:1rem;align-items:center;margin-bottom:1rem}
.link{opacity:.9;transition:opacity .3s ease}
.link:hover{opacity:1;text-decoration:underline}

.site-header{position:sticky;top:0;z-index:100;background:linear-gradient(180deg, rgba(15,15,19,.9), rgba(15,15,19,0));backdrop-filter:saturate(1.3) blur(8px);padding:.6rem 1rem;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border)}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:700}
.brand .logo{width:40px;height:40px;border-radius:8px;object-fit:cover}
.brand-text .strong{color:var(--brand)}
.nav .nav-list{display:flex;gap:.6rem;align-items:center;list-style:none;margin:0;padding:0}
.nav-toggle{display:none}
.btn{border:1px solid var(--border);background:transparent;padding:.55rem .9rem;border-radius:10px;cursor:pointer;transition:all .3s ease;position:relative;overflow:hidden}
.btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(108,70,255,.3)}
.btn:active{transform:translateY(0)}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:white;border:0}
.btn-primary:hover{box-shadow:0 8px 20px rgba(108,70,255,.4)}
.btn-outline{background:transparent}
.btn-outline:hover{background:rgba(108,70,255,.1)}
.btn-ghost{border:0;opacity:.85}
.btn-ghost:hover{opacity:1}

.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:2rem;align-items:center;padding:4rem 1rem;max-width:1100px;margin:0 auto}
.hero .hero-art{position:relative;min-height:300px}
.gradient-orb{position:absolute;inset:-20% -10% auto auto;aspect-ratio:1/1;border-radius:50%;filter:blur(40px);background:radial-gradient(circle at 30% 30%, var(--brand), transparent 60%), radial-gradient(circle at 70% 70%, var(--brand-2), transparent 60%);opacity:.6;animation:pulse 4s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:.6;transform:scale(1)}50%{opacity:.8;transform:scale(1.05)}}
.card-stack{position:absolute;inset:auto 0 0 0;display:grid;gap:.8rem}
.card-stack .card{background:var(--card);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow);padding:1rem 1.2rem;font-weight:600;max-width:260px;animation:slideIn .8s ease backwards}
.card-stack .card:nth-child(1){animation-delay:.2s}
.card-stack .card:nth-child(2){animation-delay:.4s}
.card-stack .card:nth-child(3){animation-delay:.6s}
.card-stack .card:nth-child(4){animation-delay:.8s}
@keyframes slideIn{from{opacity:0;transform:translateX(30px)}to{opacity:1;transform:translateX(0)}}
.badges{display:flex;gap:.5rem;flex-wrap:wrap;margin-top:1rem}
.badges .badge{border:1px solid var(--border);padding:.25rem .5rem;border-radius:999px;font-size:.85rem;opacity:.9;transition:all .3s ease}
.badges .badge:hover{opacity:1;transform:translateY(-2px);border-color:var(--brand);background:rgba(108,70,255,.1)}
.cta-group{display:flex;gap:.6rem;margin-top:1rem}

.grid{display:grid;gap:1rem}
.cards{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.projects{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:1.1rem;box-shadow:var(--shadow);transition:all .3s ease;cursor:pointer}
.card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,.3);border-color:var(--brand)}
.card h3{margin-bottom:.25rem;transition:color .3s ease}
.card:hover h3{color:var(--brand)}
.card p{color:var(--muted)}

.tag-cloud{display:flex;flex-wrap:wrap;gap:.5rem;list-style:none;margin:0;padding:0}
.tag-cloud li{border:1px solid var(--border);padding:.4rem .6rem;border-radius:999px;transition:all .3s ease;cursor:default}
.tag-cloud li:hover{border-color:var(--brand);background:rgba(108,70,255,.1);transform:translateY(-2px)}
.tag-cloud.small li{font-size:.85rem}

.about{display:grid;grid-template-columns:1.2fr .8fr;gap:1rem}
.checklist{margin:.6rem 0 0 0;padding-left:1rem}
.checklist li{margin:.25rem 0}
.kpis{display:grid;grid-template-columns:repeat(2,1fr);gap:.5rem}
.kpis .kpi{padding:.9rem;border-radius:12px;background:linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,0));border:1px solid var(--border)}
.kpi .value{font-size:1.6rem;font-weight:800}
.kpi .label{color:var(--muted);font-size:.9rem}

.contact-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:1rem}
label{display:flex;flex-direction:column;font-size:.9rem;gap:.3rem;margin-bottom:.6rem}
input,textarea{background:transparent;border:1px solid var(--border);border-radius:10px;padding:.6rem;color:var(--fg)}
.form-ok{color:#22c55e;margin-top:.5rem}

.site-footer{display:flex;justify-content:space-between;gap:1rem;align-items:center;padding:2rem 1rem;border-top:1px solid var(--border)}
.foot-nav a{margin-right:.8rem;opacity:.9}
.foot-nav a:hover{opacity:1;text-decoration:underline}

.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:.8rem;margin-top:1rem}
.stat{padding:1rem;border:1px dashed var(--border);border-radius:12px;text-align:center;transition:all .3s ease}
.stat:hover{border-color:var(--brand);background:rgba(108,70,255,.05);transform:scale(1.05)}
.stat .big{font-size:1.8rem;font-weight:800;background:linear-gradient(135deg,var(--brand),var(--brand-2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

.error-message{position:fixed;top:1rem;right:1rem;background:#ef4444;color:white;padding:1rem 1.5rem;border-radius:12px;box-shadow:0 10px 30px rgba(0,0,0,.3);z-index:1000;animation:slideInRight .3s ease}
@keyframes slideInRight{from{opacity:0;transform:translateX(100px)}to{opacity:1;transform:translateX(0)}}
.copy-tooltip{position:absolute;bottom:100%;left:50%;transform:translateX(-50%);background:var(--brand);color:white;padding:.3rem .6rem;border-radius:6px;font-size:.85rem;white-space:nowrap;margin-bottom:.3rem;animation:fadeIn .3s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}

@media (max-width: 900px){
  .hero, .about, .contact-grid{grid-template-columns:1fr}
  .nav .nav-list{display:none;position:absolute;right:1rem;top:56px;background:var(--card);padding:1rem;border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow)}
  .nav .nav-list.open{display:flex;flex-direction:column;animation:slideDown .3s ease}
  .nav-toggle{display:block}
}
@keyframes slideDown{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}