:root{
  --bg:#f7f9fc; --card:#ffffff; --ink:#1c2430; --muted:#5b6675;
  --accent:#2563eb; --accent-dark:#1d4ed8; --ring:#dbe4f3; --good:#15803d;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:880px;margin:0 auto;padding:20px 16px 64px}
header.site{background:var(--card);border-bottom:1px solid var(--ring)}
header.site .wrap{display:flex;align-items:center;gap:12px;padding:14px 16px}
.logo{font-weight:800;font-size:1.25rem;color:var(--ink);text-decoration:none}
.logo span{color:var(--accent)}
nav.main{display:flex;gap:4px;flex-wrap:wrap;margin-left:auto}
nav.main a{padding:8px 12px;border-radius:10px;font-size:.95rem;color:var(--muted)}
nav.main a:hover{background:#eef3fb;color:var(--ink);text-decoration:none}
.hero{background:linear-gradient(135deg,#eff6ff,#e0edff);border:1px solid var(--ring);border-radius:18px;padding:36px 28px;margin:24px 0}
.hero h1{margin:0 0 10px;font-size:2rem;line-height:1.25}
.hero p{margin:0 0 18px;color:var(--muted);font-size:1.05rem}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:12px 22px;border-radius:12px;font-weight:600;border:0;cursor:pointer;font-size:1rem}
.btn:hover{background:var(--accent-dark);color:#fff;text-decoration:none}
.card{background:var(--card);border:1px solid var(--ring);border-radius:16px;padding:24px;margin:18px 0;box-shadow:0 1px 2px rgba(20,40,80,.04)}
.card h2{margin-top:0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:18px 0}
.tool{background:var(--card);border:1px solid var(--ring);border-radius:14px;padding:20px}
.tool:hover{border-color:var(--accent)}
.tool h3{margin:0 0 6px;font-size:1.1rem}
.tool p{margin:0;color:var(--muted);font-size:.95rem}
label.field{display:block;margin:14px 0 6px;font-weight:600}
input[type=date],input[type=time],input[type=text],input[type=datetime-local],select{width:100%;padding:12px;border:1px solid #c9d5e8;border-radius:10px;font-size:1rem;background:#fff}
input:focus,select:focus{outline:2px solid var(--accent);border-color:var(--accent)}
.row{display:flex;gap:12px;flex-wrap:wrap}
.row>*{flex:1;min-width:160px}
.result{background:#f0f7ff;border:1px solid #bcd3f7;border-radius:14px;padding:20px;margin-top:20px;display:none}
.result.show{display:block}
.big-num{font-size:2.2rem;font-weight:800;color:var(--accent-dark)}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;margin-top:14px}
.stat{background:#fff;border:1px solid var(--ring);border-radius:10px;padding:10px;text-align:center}
.stat b{display:block;font-size:1.3rem;color:var(--ink)}
.stat span{font-size:.85rem;color:var(--muted)}
.countdown-display{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0}
.cd{background:#fff;border:1px solid var(--ring);border-radius:12px;padding:14px 18px;text-align:center;min-width:86px}
.cd b{display:block;font-size:2rem;color:var(--accent-dark);font-variant-numeric:tabular-nums}
.cd span{font-size:.85rem;color:var(--muted)}
.ad-slot{border:1px dashed #b6c2d4;border-radius:10px;padding:14px;text-align:center;color:#8a97a8;font-size:.85rem;margin:18px 0;background:#fafbfe}
.explainer h3{margin-top:22px}
footer.site{border-top:1px solid var(--ring);background:var(--card);margin-top:40px}
footer.site .wrap{display:flex;gap:18px;flex-wrap:wrap;align-items:center;padding:18px 16px;font-size:.9rem;color:var(--muted)}
footer.site nav{display:flex;gap:14px;margin-left:auto}
.note{font-size:.9rem;color:var(--muted)}
.error{color:#b91c1c;font-weight:600;margin-top:10px}
@media(max-width:560px){.hero h1{font-size:1.6rem}.big-num{font-size:1.7rem}}