/* ZeroFee Tools - date-difference-calculator styles */
*{box-sizing:border-box;margin:0;padding:0}
:root{--a:#7c3aed;--b:#4f46e5;--ink:#1e293b;--muted:#64748b;--line:#e2e8f0;--bg:#f7f5ff;--card:#fff;--ok:#16a34a}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
#siteHeader{background:linear-gradient(135deg,var(--a),var(--b));color:#fff;padding:26px 0 8px}
.header-inner{display:flex;align-items:center}
.brand{display:flex;gap:14px;align-items:center}
.hub-link{color:#fff;text-decoration:none;font-size:.85rem;opacity:.85;display:block;margin-bottom:2px}
.hub-link:hover{text-decoration:underline;opacity:1}
.brand-name{font-size:1.7rem;line-height:1.15}
.brand-tag{opacity:.9;font-size:.9rem}
#main{padding:30px 0 10px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;margin:18px 0}
.card h2{font-size:1.15rem;margin-bottom:12px}
label{display:block;font-size:.9rem;font-weight:600;margin-bottom:12px}
input[type=date],input[type=number],select{display:block;width:100%;margin-top:6px;padding:10px 12px;font-size:1rem;border:1px solid var(--line);border-radius:8px;font-family:inherit;background:#fff;color:var(--ink)}
.btn{display:inline-block;background:var(--a);color:#fff;border:none;border-radius:8px;padding:10px 18px;font-size:.95rem;font-weight:600;cursor:pointer;margin:4px 6px 4px 0}
.btn:hover{filter:brightness(.92)}
.btn.secondary{background:#fff;color:var(--a);border:1px solid var(--a)}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.tab{border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 18px;font-size:.92rem;cursor:pointer;color:var(--ink);font-weight:600}
.tab.active{background:var(--a);border-color:var(--a);color:#fff}
.panel{display:none}
.panel.active{display:block;animation:fade .2s ease}
@keyframes fade{from{opacity:0}to{opacity:1}}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:700px){.grid2{grid-template-columns:1fr}}
.result-hero{text-align:center;background:linear-gradient(135deg,#ede9fe,#eef2ff);border:1px solid #c4b5fd;border-radius:12px;padding:22px;margin:14px 0}
.result-hero .big{font-size:2rem;font-weight:800;color:var(--a);line-height:1.3}
.result-hero .sub{color:var(--muted);margin-top:6px}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin-top:14px}
.stat{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:14px;text-align:center}
.stat .k{font-size:.78rem;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.stat .v{font-size:1.3rem;font-weight:700}
.check-row{display:flex;align-items:center;gap:8px;font-weight:500;margin:10px 0;cursor:pointer}
.muted{color:var(--muted)}.small{font-size:.85rem}
.err{background:#fef2f2;border:1px solid #fecaca;color:#991b1b;border-radius:10px;padding:12px 16px;margin:12px 0}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);background:#0f172a;color:#fff;padding:10px 18px;border-radius:999px;font-size:.9rem;opacity:0;pointer-events:none;transition:.25s;z-index:50}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}