:root{--bg:#f4f7fb;--card:#fff;--text:#0f172a;--muted:#64748b;--line:#e2e8f0;--blue:#2563eb;--cyan:#0891b2;--green:#16a34a;--red:#dc2626;--shadow:0 8px 28px rgba(15,23,42,.08)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;padding-bottom:28px}body.dark{--bg:#0b1220;--card:#111827;--text:#f8fafc;--muted:#94a3b8;--line:#273449;--shadow:none}header{padding:calc(16px + env(safe-area-inset-top)) 16px 14px;background:linear-gradient(135deg,#2563eb,#0891b2);color:white;display:flex;justify-content:space-between;align-items:center}.brand{font-weight:800;font-size:20px}.sub{font-size:12px;opacity:.85;margin-top:3px}.iconBtn{border:0;background:#ffffff22;color:#fff;width:40px;height:40px;border-radius:12px;font-size:20px}nav{position:sticky;top:0;z-index:10;display:grid;grid-template-columns:repeat(4,1fr);background:var(--card);border-bottom:1px solid var(--line)}nav button{border:0;background:transparent;color:var(--muted);padding:12px 4px;font-weight:700;font-size:12px}nav button.active{color:var(--blue);border-bottom:3px solid var(--blue)}main{max-width:820px;margin:auto;padding:14px}.page{display:none}.page.active{display:block}.toolbar{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:12px}.toolbar label,.form label,.field{display:flex;flex-direction:column;gap:6px;color:var(--muted);font-size:12px;font-weight:700;min-width:0}input,select{width:100%;min-width:0;border:1px solid var(--line);background:var(--card);color:var(--text);border-radius:12px;padding:12px;font-size:16px;outline:none}input:focus,select:focus{border-color:var(--blue)}.hero{background:linear-gradient(135deg,#1d4ed8,#0e7490);color:white;border-radius:20px;padding:20px;display:grid;grid-template-columns:1fr 1fr;gap:16px;box-shadow:var(--shadow)}.hero span{display:block;font-size:12px;opacity:.85}.hero strong{display:block;font-size:24px;margin-top:6px}.cards{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:12px 0}.cards article,.panel{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:15px;box-shadow:var(--shadow)}.cards span{font-size:12px;color:var(--muted)}.cards b{display:block;font-size:18px;margin-top:6px}.panel{margin:12px 0}.panel h2,.panel h3{margin:0 0 14px}.panelTitle{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.panelTitle span{font-size:12px;color:var(--muted)}canvas{width:100%;display:block}.tierRow,.historyRow,.meterRow,.compareRow{display:grid;align-items:center;gap:8px;padding:10px 0;border-top:1px solid var(--line)}.tierRow{grid-template-columns:1fr auto}.historyRow{grid-template-columns:80px 1fr auto}.meterRow{grid-template-columns:1fr auto}.compareRow{grid-template-columns:75px 1fr auto}.bar{height:8px;background:var(--line);border-radius:99px;overflow:hidden}.bar i{display:block;height:100%;background:linear-gradient(90deg,#2563eb,#06b6d4);border-radius:99px}.muted{color:var(--muted);font-size:12px}.form{display:grid;gap:12px}.primary,.secondary,.danger,.smallBtn{border:0;border-radius:12px;padding:12px 14px;font-weight:800;font-size:14px}.primary{background:var(--blue);color:#fff}.secondary{background:#e0e7ff;color:#1e40af}.danger{background:#fee2e2;color:#991b1b}.smallBtn{padding:8px 10px;background:#e0e7ff;color:#1e40af}.tip{font-size:12px;color:var(--muted);line-height:1.5}.tiers{display:grid;grid-template-columns:1fr 1fr;gap:10px}.tierInput{background:var(--bg);border-radius:12px;padding:10px}.tierInput span{font-size:11px;color:var(--muted);display:block;margin-bottom:5px}.tierInput input{background:var(--card)}.actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}.dangerZone{border-color:#fecaca!important}#toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(80px);background:#0f172a;color:white;padding:11px 16px;border-radius:12px;opacity:0;transition:.25s;z-index:50;font-size:13px}#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}.empty{text-align:center;padding:24px 6px;color:var(--muted);font-size:13px}@media(max-width:380px){main{padding:10px}.hero{padding:16px}.hero strong{font-size:20px}.toolbar{gap:8px}input,select{font-size:15px;padding:11px 9px}.tiers{grid-template-columns:1fr}.actions{grid-template-columns:1fr}}