:root{--bg:#f4f7fb;--panel:#fff;--ink:#162033;--muted:#657188;--line:#dce3ee;--primary:#1769e0;--soft:#eef5ff;--danger:#b42318;--ok:#16803c}
*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--ink)}
.topbar{height:62px;background:#101827;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 24px;font-size:14px}.topbar strong{font-size:18px}.badge{background:#22324e;border:1px solid #344866;padding:7px 11px;border-radius:20px;color:#cfe0ff}
.app{display:grid;grid-template-columns:220px 1fr;min-height:calc(100vh - 62px)}.sidebar{padding:24px 14px;border-right:1px solid var(--line);background:#fff}.step{padding:14px 12px;border-radius:10px;margin-bottom:7px;color:#647086;cursor:pointer}.step b{display:inline-block;width:35px;color:#9aa5b6}.step.active{background:var(--soft);color:var(--primary);font-weight:700}
.workspace{max-width:1250px;width:100%;margin:auto;padding:24px}.notice{background:#fff8e6;border:1px solid #f3d48a;padding:12px 14px;border-radius:10px;margin-bottom:18px;font-size:13px;color:#6d5100}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:0 3px 15px rgba(20,35,60,.04)}.hidden{display:none}h1{font-size:24px;margin:0 0 8px}.muted{color:var(--muted);line-height:1.5}
.dropzone{min-height:180px;border:2px dashed #b8c5d8;border-radius:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:7px;margin:18px 0;cursor:pointer;background:#fbfdff}.dropzone input{display:none}.dropicon{font-size:40px;color:var(--primary)}.dropzone small{color:var(--muted)}
.grid2,.grid3,.grid4{display:grid;gap:12px;margin:15px 0}.grid2{grid-template-columns:repeat(2,1fr)}.grid3{grid-template-columns:repeat(3,1fr)}.grid4{grid-template-columns:repeat(4,1fr)}
label{font-size:12px;color:#5c687c;font-weight:700}input{display:block;width:100%;margin-top:6px;padding:10px 11px;border:1px solid #cbd5e1;border-radius:8px;background:#fff;color:var(--ink);font-size:14px}
button{border:1px solid #cbd5e1;background:#fff;color:#24324a;padding:10px 13px;border-radius:8px;cursor:pointer;font-weight:700}button:hover{background:#f3f6fa}button.primary{background:var(--primary);border-color:var(--primary);color:#fff}.toolbar,.exportgrid{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}.hint{color:var(--muted);font-size:12px;margin-top:8px}
.drawing{width:100%;height:auto;min-height:360px;border:1px solid #ccd5e3;background:#fff;border-radius:10px}.profile{margin-top:18px}
table{width:100%;border-collapse:collapse;margin-top:15px;font-size:13px}th,td{border-bottom:1px solid var(--line);padding:10px;text-align:left}th{background:#f7f9fc}
.calcgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.card{border:1px solid var(--line);border-radius:10px;padding:14px;background:#fbfdff}.card span,.card small{display:block;color:var(--muted)}.card strong{display:block;font-size:20px;margin:7px 0}.formula{margin-top:16px;padding:15px;border:1px solid var(--line);border-radius:10px;background:#fbfdff}.formula code{display:block;padding:9px;background:#111827;color:#e5edf9;border-radius:6px;margin:6px 0;font-family:Consolas,monospace}
.warnings{margin-top:12px;padding:10px;border-radius:8px;background:#fff8e6;color:#6d5100;font-size:12px}.draft{margin-top:18px;background:#fff;border:1px solid #111827;padding:30px;min-height:500px}.draft h2{border-bottom:2px solid #111827;padding-bottom:8px}.draft .sheet{display:grid;grid-template-columns:1fr 1fr;gap:18px}.draft .box{border:1px solid #222;padding:12px}.small{font-size:11px;color:#5c687c}
.ok{color:var(--ok)}.err{color:var(--danger)}
@media(max-width:900px){.app{grid-template-columns:1fr}.sidebar{display:flex;overflow:auto}.step{min-width:130px}.grid4,.grid3,.grid2,.calcgrid{grid-template-columns:1fr}.workspace{padding:12px}}
@media print{.topbar,.sidebar,.notice,.exportgrid{display:none!important}.app{display:block}.workspace{padding:0}.panel{box-shadow:none;border:0}.panel:not(#step5){display:none}.draft{border:0;margin:0}}