:root[data-theme="light"] {
  --bg:#f8fafc; --card-bg:#fff; --text:#0f172a; --text-muted:#64748b;
  --accent:#3b82f6; --accent-hover:#2563eb; --accent-light:#60a5fa;
  --border:#e2e8f0;
  --shadow:0 1px 3px rgba(15,23,42,.06),0 4px 12px rgba(15,23,42,.04);
  --shadow-hover:0 8px 24px rgba(59,130,246,.15);
}
:root[data-theme="dark"] {
  --bg:#0f172a; --card-bg:#1e293b; --text:#f8fafc; --text-muted:#94a3b8;
  --accent:#3b82f6; --accent-hover:#60a5fa; --accent-light:#60a5fa;
  --border:#334155;
  --shadow:0 1px 3px rgba(0,0,0,.3),0 4px 12px rgba(0,0,0,.2);
  --shadow-hover:0 8px 24px rgba(59,130,246,.25);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;display:flex;flex-direction:column;transition:background .3s,color .3s;-webkit-font-smoothing:antialiased}
header{background:var(--card-bg);border-bottom:1px solid var(--border);padding:16px 24px;position:sticky;top:0;z-index:100;backdrop-filter:blur(8px)}
.header-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:800;color:var(--text);text-decoration:none;letter-spacing:-.02em}
.logo-emoji{font-size:1.5rem}
.logo-text span{color:var(--accent)}
.header-actions{display:flex;align-items:center;gap:8px}
.icon-btn{background:var(--bg);border:1px solid var(--border);color:var(--text);padding:8px 14px;border-radius:10px;cursor:pointer;font-size:.9rem;font-weight:600;transition:all .2s;font-family:inherit}
.icon-btn:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
.wrap{flex:1;max-width:1200px;margin:0 auto;padding:32px 24px 64px;width:100%}
.hero{text-align:center;padding:48px 16px 32px}
.hero h1{font-size:clamp(1.75rem,4vw,2.75rem);font-weight:800;letter-spacing:-.03em;margin-bottom:12px;line-height:1.15}
.hero h1 .accent{color:var(--accent)}
.hero p{color:var(--text-muted);font-size:1.1rem;max-width:640px;margin:0 auto}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px;margin:40px 0}
.tool-card{background:var(--card-bg);border:1px solid var(--border);border-radius:16px;padding:24px;text-decoration:none;color:var(--text);transition:all .3s;display:flex;flex-direction:column;gap:8px;box-shadow:var(--shadow)}
.tool-card:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:var(--shadow-hover)}
.tool-card .emoji{font-size:2rem;line-height:1;margin-bottom:4px}
.tool-card h3{font-size:1.1rem;font-weight:700;color:var(--text)}
.tool-card p{font-size:.9rem;color:var(--text-muted);line-height:1.5}
.tool-card .arrow{margin-top:auto;color:var(--accent);font-weight:600;font-size:.85rem}
.calc-card{background:var(--card-bg);border:1px solid var(--border);border-radius:16px;padding:28px;margin:24px 0;box-shadow:var(--shadow)}
.calc-card h2{font-size:1.25rem;margin-bottom:20px;display:flex;align-items:center;gap:8px}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:.9rem;font-weight:600;margin-bottom:6px;color:var(--text)}
.form-group input,.form-group select{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text);font-size:1rem;font-family:inherit;transition:border-color .2s}
.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(59,130,246,.12)}
.btn{background:var(--accent);color:#fff;border:none;padding:12px 24px;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s;font-family:inherit;width:100%}
.btn:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 6px 16px rgba(59,130,246,.3)}
.result-box{background:linear-gradient(135deg,rgba(59,130,246,.08),rgba(96,165,250,.04));border:1px solid var(--accent);border-radius:12px;padding:20px;margin-top:20px;display:none}
.result-box.show{display:block;animation:fadeIn .3s}
.result-box .big-num{font-size:2rem;font-weight:800;color:var(--accent);letter-spacing:-.02em}
.result-box .label{font-size:.85rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-weight:600}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.faq{margin:48px 0}
.faq h2{font-size:1.5rem;margin-bottom:20px;text-align:center}
.faq-item{background:var(--card-bg);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:12px}
.faq-item h3{font-size:1rem;margin-bottom:8px;color:var(--accent)}
.faq-item p{color:var(--text-muted);font-size:.95rem}
.network-links{margin:48px 0 24px;padding:32px 24px;background:var(--card-bg);border:1px solid var(--border);border-radius:16px}
.network-links h2{font-size:1.35rem;margin-bottom:6px;text-align:center}
.network-links .subtitle{text-align:center;color:var(--text-muted);margin-bottom:24px;font-size:.95rem}
.network-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.network-item{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--bg);border:1px solid var(--border);border-radius:12px;text-decoration:none;color:var(--text);transition:all .2s}
.network-item:hover{border-color:var(--accent);transform:translateX(4px)}
.network-item .net-emoji{font-size:1.5rem;flex-shrink:0}
.network-item .net-info{display:flex;flex-direction:column;min-width:0}
.network-item .net-name{font-weight:700;font-size:.95rem}
.network-item .net-desc{font-size:.78rem;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
footer{background:var(--card-bg);border-top:1px solid var(--border);padding:32px 24px;margin-top:auto}
.footer-inner{max-width:1200px;margin:0 auto;display:flex;flex-direction:column;gap:20px}
.footer-links{display:flex;flex-wrap:wrap;gap:20px;justify-content:center}
.footer-links a{color:var(--text-muted);text-decoration:none;font-size:.9rem;font-weight:500;transition:color .2s}
.footer-links a:hover{color:var(--accent)}
.footer-copy{text-align:center;color:var(--text-muted);font-size:.85rem;padding-top:16px;border-top:1px solid var(--border)}
.footer-copy strong{color:var(--text)}
.breadcrumb{font-size:.85rem;color:var(--text-muted);margin-bottom:12px}
.breadcrumb a{color:var(--accent);text-decoration:none}
.breadcrumb a:hover{text-decoration:underline}
.ad-slot{overflow:hidden;max-width:100%}
#offline-wall{display:none;position:fixed;inset:0;background:#0f172a;z-index:999999;align-items:center;justify-content:center;color:#f8fafc;text-align:center;padding:24px}
#offline-wall.show{display:flex}
#offline-wall .off-inner h2{font-size:2rem;margin-bottom:12px}
#offline-wall .off-inner p{color:#94a3b8;max-width:400px}
@media(max-width:640px){.wrap{padding:20px 16px 48px}.hero{padding:32px 8px 24px}.calc-card{padding:20px}.network-grid{grid-template-columns:1fr}.header-inner{gap:8px}.logo{font-size:1.1rem}}
@media print{header,footer,.ad-slot,.network-links{display:none!important}body{background:#fff;color:#000}}