:root{--primary:#1867C0;--text:#111827;--muted:#4b5563;--bg:#f5f7fb;--surface:#fff;--border:#e5e7eb;--shadow:0 10px 26px rgba(17,24,39,.08)}
*{box-sizing:border-box} html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial}
a{color:var(--primary);text-decoration:none} a:hover{text-decoration:underline}
.container{max-width:1200px;margin:0 auto;padding:0 18px}
.header{position:sticky;top:0;z-index:30;background:var(--surface);border-bottom:1px solid var(--border)}
.header .row{display:flex;align-items:center;justify-content:space-between;padding:12px 0;gap:12px}
.brand{display:flex;align-items:center;gap:10px}.brand img{height:36px}
nav{display:flex;gap:10px;flex-wrap:wrap} nav a{padding:8px 12px;border:1px solid var(--border);border-radius:999px;background:#fff}
nav a.active,nav a:hover{border-color:#c7cdd5}
.hero{padding:28px 0 12px}
h1{font-size:clamp(32px,4.8vw,52px);line-height:1.06;margin:6px 0 6px;font-weight:900;letter-spacing:-.2px}
.subtitle{color:var(--muted);max-width:900px}
.grid{display:grid;grid-template-columns:1.05fr .95fr;gap:18px}@media(max-width:980px){.grid{grid-template-columns:1fr}}
.panel{background:#fff;border:1px solid var(--border);border-radius:16px;padding:18px;box-shadow:var(--shadow)}
.section-title{font-weight:900;margin:8px 0 8px;font-size:22px}
.drop{border:2px dashed #cbd5e1;border-radius:14px;height:220px;display:grid;place-items:center;text-align:center;color:#6b7280;background:#fafafa;cursor:pointer;transition:.15s}
.drop:hover{background:#f8fafc}.drop.dragover{border-color:var(--primary);background:#eef5ff}
.btn{display:inline-flex;align-items:center;gap:10px;padding:12px 16px;border-radius:10px;font-weight:800;border:1px solid var(--primary);background:var(--primary);color:#fff;cursor:pointer}
.btn.secondary{background:#fff;border-color:#d1d5db;color:#111827}.btn:disabled{opacity:.6;cursor:not-allowed}
.card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:14px;margin-top:16px;box-shadow:var(--shadow)}
.meta{display:flex;gap:10px;flex-wrap:wrap;color:#6b7280;font-size:14px;margin-top:8px}
.tablewrap{max-height:300px;overflow:auto}
table{width:100%;border-collapse:collapse} th,td{padding:10px 8px;border-bottom:1px solid #eef2f7;font-size:14px;text-align:left}
th{color:#1f2937;font-weight:700}
.footer{margin:28px 0 50px;color:#6b7280;font-size:13px}

@media(max-width:680px){}
.content{line-height:1.8;background:#fff;border:1px solid var(--border);border-radius:16px;padding:18px;box-shadow:var(--shadow)}
.content h2{margin-top:18px;font-size:26px}.content h3{margin-top:14px;font-size:20px;color:#111827}.content p{margin:10px 0}.content ul,.content ol{padding-left:22px}
.kbd{border:1px solid var(--border);background:#f3f4f6;padding:0 6px;border-radius:6px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.callout{display:flex;gap:10px;align-items:flex-start;background:#f8fbff;border:1px solid #cfe0ff;border-radius:12px;padding:12px;margin:10px 0}
.progress{width:100%;background:#eee;border-radius:6px;overflow:hidden;margin-top:10px}
.progress>div{width:0%;background:#22c55e;color:#fff;text-align:center;font-size:12px;height:20px;line-height:20px;transition:width .15s}

/* --- Super Hero Refresh --- */
.super-hero{position:relative; overflow:hidden; padding:72px 0 28px; background:radial-gradient(1200px 500px at 10% -10%, #e0f2fe 10%, transparent 60%), radial-gradient(900px 380px at 90% 10%, #ecfeff 10%, transparent 60%);}
.super-hero .hero-inner{display:grid; grid-template-columns:1.1fr 1fr; align-items:center; gap:40px}
@media(max-width:980px){.super-hero .hero-inner{grid-template-columns:1fr; gap:18px} .super-hero{padding:48px 0 16px}}
.big-title{font-size:44px; line-height:1.15; font-weight:800; letter-spacing:-0.02em; margin:0 0 10px}
.highlight{background:linear-gradient(90deg,#2563EB,#06B6D4); -webkit-background-clip:text; background-clip:text; color:transparent}
.lead{font-size:18px; color:#475569; margin:6px 0 18px}
.cta-row{display:flex; gap:12px; flex-wrap:wrap}
.hero-cta{box-shadow:0 12px 20px rgba(37,99,235,.25)}
.trust{display:flex; flex-wrap:wrap; gap:14px; padding:0; margin:16px 0 0; list-style:none; color:#334155}
.trust li{display:flex; align-items:center; gap:6px; padding:8px 12px; background:#fff; border:1px solid #e5e7eb; border-radius:999px}
.hero-art img{width:100%; height:auto; border-radius:20px; box-shadow:0 24px 50px rgba(2,8,23,.08)}
/* floating orbs */
.bg-orbs{position:absolute; inset:0; pointer-events:none}
.bg-orbs span{position:absolute; width:220px; height:220px; background:radial-gradient(circle, #dbeafe, transparent 60%); filter:blur(12px); opacity:.8; border-radius:999px; animation:float 12s ease-in-out infinite}
.bg-orbs span:nth-child(1){top:-40px; left:-60px}
.bg-orbs span:nth-child(2){bottom:-60px; right:10%}
.bg-orbs span:nth-child(3){top:10%; right:-80px; width:260px; height:260px}
@keyframes float{50%{transform:translateY(-12px)}}
/* Header tweaks */
.header .brand img{height:34px}
.btn{border-radius:12px; font-weight:700; padding:12px 18px}
.btn.secondary{background:#fff; color:#0f172a; border:1px solid #e5e7eb}

/* ===== Mobile-friendly navigation ===== */
.header .container.row{display:flex; align-items:center; justify-content:space-between}
.nav-toggle{display:none; background:#0f172a; color:#fff; border:0; border-radius:10px; padding:10px 12px; font-size:18px; line-height:1; cursor:pointer}
.main-nav a{padding:10px 12px; display:inline-block}
@media (max-width: 900px){
  .nav-toggle{display:inline-block}
  .main-nav{position:fixed; top:64px; left:0; right:0; background:#ffffff; border-top:1px solid #e5e7eb; box-shadow:0 12px 24px rgba(15,23,42,.08); transform:translateY(-120%); transition:.25s ease; padding:10px 16px; z-index:50}
  .main-nav a{display:block; padding:14px 6px; font-size:16px}
  .header.menu-open .main-nav{transform:translateY(0)}
}
/* ===== Mobile hero & layout tweaks ===== */
@media (max-width: 980px){
  .big-title{font-size:32px}
  .lead{font-size:16px}
  .hero-art img{border-radius:16px; box-shadow:0 16px 36px rgba(2,8,23,.08)}
  .btn{padding:12px 16px; font-size:16px}
  .panel{padding:18px}
}
@media (max-width: 680px){
  .drop{min-height:180px}
  .tablewrap{overflow:auto; -webkit-overflow-scrolling:touch}
  table{min-width:520px}
}
/* Reduce animation for small screens/prefers-reduced-motion */
@media (max-width: 680px){
  .bg-orbs span{animation:none; opacity:.6}
}
@media (prefers-reduced-motion: reduce){
  .bg-orbs span{animation:none}
}