:root{
  --blue:#1e6dff;--blue-dark:#134dc2;--dark:#12131a;--orange:#ea8f00;--green:#1f9d55;
  --ink:#1d1d1a;--muted:#667085;--line:#e6e9f2;--bg:#f6f7fb;--white:#fff;
  --radius:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);min-height:100vh;display:flex;flex-direction:column;-webkit-font-smoothing:antialiased}
a{color:var(--blue)}
.skip-link{position:absolute;left:-9999px;top:8px;padding:8px 16px;background:var(--dark);color:#fff;border-radius:6px;font-size:.9rem;text-decoration:none;z-index:200}
.skip-link:focus{left:8px}

/* ── Nawigacja ── */
.topbar{position:sticky;top:0;z-index:50;background:rgba(18,19,26,.92);backdrop-filter:saturate(180%) blur(10px);
  color:#fff;padding:14px 28px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px}
.topbar-brand{font-size:.95rem;font-weight:700;letter-spacing:.2px;display:flex;align-items:center;gap:8px}
.topbar-brand .bolt{width:9px;height:9px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--orange));flex-shrink:0}
.topbar a.link-btn{color:#fff;text-decoration:none;font-size:.83rem;font-weight:600;border:1px solid rgba(255,255,255,.28);
  padding:7px 16px;border-radius:100px;transition:background .2s,border-color .2s}
.topbar a.link-btn:hover,.topbar a.link-btn:focus-visible{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.5);outline:none}

/* ── Hero ── */
.hero{background:linear-gradient(160deg,#12131a 0%,#161c33 55%,#173163 100%);color:#fff;padding:56px 28px 68px}
.hero-inner{max-width:1080px;margin:0 auto}
.hero h1{font-size:2.65rem;font-weight:800;letter-spacing:-.02em;line-height:1.08;
  background:linear-gradient(90deg,#fff,#cfe0ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .subtitle{font-size:1.05rem;color:#b7c2e0;margin-top:12px;max-width:620px;line-height:1.55}
.hero-stats{display:flex;gap:28px;margin-top:30px;flex-wrap:wrap}
.hero-stat{display:flex;flex-direction:column;gap:2px}
.hero-stat b{font-size:1.5rem;font-weight:800}
.hero-stat span{font-size:.78rem;color:#9db0da;text-transform:uppercase;letter-spacing:.5px}

/* ── Layout ── */
.container{max-width:1080px;margin:0 auto;padding:0 28px 64px;flex:1}
section.events-section{margin-top:52px}
.section-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:22px;flex-wrap:wrap}
.section-title{font-size:1.35rem;font-weight:800;display:flex;align-items:center;gap:10px;letter-spacing:-.01em}
.section-icon{width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0;color:#fff}
.section-icon svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.section-icon.upcoming{background:linear-gradient(135deg,var(--blue),#5b8dff)}
.section-icon.archive{background:linear-gradient(135deg,var(--green),#57c583)}
.section-count{font-size:.78rem;font-weight:700;color:var(--muted);background:#eef1f8;padding:4px 12px;border-radius:100px}
.empty-note{color:var(--muted);font-size:.92rem;background:var(--white);border:1px dashed var(--line);border-radius:var(--radius);padding:22px;text-align:center}

/* ── Karty ── */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px;list-style:none}
.card{background:var(--white);border-radius:var(--radius);border:1px solid var(--line);display:flex;flex-direction:column;
  overflow:hidden;transition:box-shadow .2s ease,transform .2s ease;position:relative}
.card:hover{box-shadow:0 14px 32px -12px rgba(20,30,70,.18);transform:translateY(-4px)}
.card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--blue)}
.card.orange::before{background:var(--orange)}
.card.green::before{background:var(--green)}
.card-body{padding:22px 22px 16px 26px;flex:1;display:flex;flex-direction:column;gap:12px}
.card-top-row{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.card-date{font-size:.76rem;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
.card-type-badge{font-size:.68rem;font-weight:700;padding:3px 10px;border-radius:100px;background:#eef1f8;color:var(--ink);
  white-space:nowrap;flex-shrink:0}
.card-title{font-size:1.12rem;font-weight:750;line-height:1.32;letter-spacing:-.005em}
.card-presenter{display:flex;align-items:center;gap:8px;font-size:.85rem;color:var(--muted)}
.card-presenter .avatar{width:24px;height:24px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--blue-dark));
  color:#fff;font-size:.68rem;font-weight:800;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.card.orange .card-presenter .avatar{background:linear-gradient(135deg,var(--orange),#c26f00)}
.card.green  .card-presenter .avatar{background:linear-gradient(135deg,var(--green),#157a41)}
.card-venue{font-size:.82rem;color:var(--muted)}
.card-footer{padding:14px 22px 20px 26px;display:flex;flex-wrap:wrap;gap:8px;margin-top:auto}

/* ── Przyciski ── */
.btn{display:inline-flex;align-items:center;gap:6px;text-decoration:none;padding:8px 16px;border-radius:100px;
  font-size:.8rem;font-weight:700;transition:opacity .15s,transform .15s;cursor:pointer;border:none}
.btn:hover{opacity:.9;transform:translateY(-1px)}
.btn:focus-visible{outline:3px solid var(--blue);outline-offset:2px}
.btn-play{background:var(--ink);color:#fff}
.btn-register{background:var(--blue);color:#fff;box-shadow:0 4px 14px -4px rgba(30,109,255,.5)}
.btn-slides{background:#eef1f8;color:var(--ink)}
.btn-soon{background:#fbf3e6;color:#8a5a00;border:1px dashed #e3b563;border-radius:100px;font-size:.76rem;font-weight:700;
  padding:7px 14px;display:inline-flex;align-items:center;gap:6px;cursor:default;pointer-events:none;user-select:none}
.btn svg,.btn-soon svg{width:13px;height:13px;flex-shrink:0;stroke:currentColor;fill:none;stroke-width:2.5;stroke-linecap:round;stroke-linejoin:round}

/* ── Stopka strony ── */
.logos{display:flex;align-items:center;justify-content:center;gap:40px;padding:32px 0;margin-top:12px;
  border-top:1px solid var(--line);flex-wrap:wrap}
.logos img{height:44px;width:auto;object-fit:contain;opacity:.85}
.project-info{text-align:center;font-size:.83rem;color:var(--muted);margin-bottom:32px;line-height:1.7}
.info-box{background:#eef4ff;border-left:4px solid var(--blue);border-radius:0 var(--radius) var(--radius) 0;
  padding:18px 22px;margin:40px 0 0;font-size:.9rem;line-height:1.65;color:#1e2840}
.info-box a{color:var(--blue);font-weight:700;text-decoration:none;border-bottom:1px solid transparent;transition:border .2s}
.info-box a:hover{border-bottom-color:var(--blue)}
footer.site-footer{background:var(--dark);color:#aab2c8;padding:22px;text-align:center;font-size:.82rem}

@media(max-width:640px){
  .hero{padding:44px 20px 52px}
  .hero h1{font-size:2rem}
  .container{padding:0 20px 48px}
  .grid{grid-template-columns:1fr}
  .logos{flex-direction:column;gap:18px}
}