:root{--bg:#f4f6fa;--card:#fff;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--dark:#111827;--accent:#0f766e;--accent2:#0369a1;--danger:#b91c1c;--soft:#f8fafc}*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink)}button,input,select{font:inherit}.topbar{position:sticky;top:0;z-index:10;background:var(--dark);color:white;padding:14px 16px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 6px 18px rgba(15,23,42,.25)}.brand{font-size:22px;font-weight:800;letter-spacing:.5px}.subtitle{color:#cbd5e1;font-size:13px;margin-top:2px}.wrap{width:min(860px,100%);margin:0 auto;padding:14px}.panel{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:16px;margin-bottom:14px;box-shadow:0 8px 28px 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#22c55e}.scan-status{margin:12px}.hidden{display:none!important}@media(max-width:520px){.wrap{padding:10px}.topbar{padding:12px 14px}.brand{font-size:20px}.grid-data{grid-template-columns:1fr}.stock{grid-template-columns:1fr 1fr 1fr}.stock-card b{font-size:21px}.calc-grid{grid-template-columns:1fr}.search-line{grid-template-columns:1fr}}