:root{--blue:#3157d5;--dark:#203da6;--ink:#172033;--muted:#667085;--line:#dfe4ee;--bg:#f6f8fc;--soft:#eef2ff;--danger:#b42318}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px Arial,sans-serif}a{text-decoration:none;color:inherit}.wrap{width:min(980px,calc(100% - 28px));margin:auto}header{height:68px;background:#fff;border-bottom:1px solid var(--line)}.nav{height:68px;display:flex;align-items:center;justify-content:space-between}.brand{font-size:23px;font-weight:900}.brand b{color:var(--blue)}nav{display:flex;gap:24px}nav .active{color:var(--blue);font-weight:700}.intro{text-align:center;padding:46px 0 24px}.tag{color:var(--blue);font-size:12px;font-weight:800;letter-spacing:.12em}.intro h1{font-size:clamp(34px,5vw,50px);margin:9px 0}.intro p{color:var(--muted);margin:0;line-height:1.6}.panel{background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px;box-shadow:0 14px 40px #1b31540d}.drop{min-height:220px;border:2px dashed #aebee8;border-radius:16px;display:grid;place-content:center;text-align:center;padding:20px;cursor:pointer;background:#f9fbff}.drop.over{background:var(--soft);border-color:var(--blue)}.drop input{display:none}.mark{width:58px;height:58px;border-radius:16px;background:var(--blue);color:#fff;display:grid;place-items:center;margin:0 auto 13px;font-weight:900}.drop strong{font-size:19px}.drop span{color:var(--muted);margin-top:8px}.work{display:none}.filebar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:18px;border-bottom:1px solid var(--line)}.filebar span{font-size:14px;color:var(--muted)}.btn{border:0;border-radius:10px;background:var(--blue);color:#fff;font-weight:800;padding:13px 20px;cursor:pointer;font-size:14px}.btn.alt{background:var(--soft);color:#2947b4}.btn.danger{background:#fee4e2;color:var(--danger)}.btn:disabled{opacity:.45;cursor:not-allowed}.section{margin-top:22px}.section h2{font-size:20px;margin:0 0 6px}.section>p{color:var(--muted);font-size:14px;line-height:1.5;margin:0 0 15px}.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.field label,.field>span{display:block;font-size:13px;font-weight:800;margin-bottom:7px}.field input[type=text],.field input[type=number],.field select,.field textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:12px;background:#fff;font:15px Arial}.field textarea{min-height:88px;resize:vertical}.row{display:flex;gap:10px;align-items:end}.row>*{flex:1}.item{border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:10px;background:#fff}.item-head{display:flex;justify-content:space-between;gap:12px;margin-bottom:10px}.item-head span{font-size:13px;color:var(--muted)}.notice{background:var(--soft);color:#39466a;padding:13px 15px;border-radius:10px;margin-top:18px;font-size:14px;line-height:1.5}.actions{display:flex;justify-content:center;gap:10px;margin-top:22px}.status{text-align:center;color:var(--muted);min-height:24px;margin-top:15px}.status.err{color:var(--danger)}.status.ok{color:#15803d}.bar{height:7px;background:#edf0f5;border-radius:9px;overflow:hidden;margin-top:18px}.bar i{display:block;width:0;height:100%;background:var(--blue);transition:.2s}canvas{width:100%;height:150px;border:1px solid var(--line);border-radius:10px;background:#fff;touch-action:none}.empty{padding:20px;text-align:center;border:1px dashed var(--line);border-radius:12px;color:var(--muted)}footer{margin-top:64px;background:#fff;border-top:1px solid var(--line)}.foot{min-height:90px;display:flex;justify-content:space-between;align-items:center;color:var(--muted)}@media(max-width:680px){.grid{grid-template-columns:1fr}.panel{padding:16px}.filebar{align-items:flex-start}.row{flex-direction:column;align-items:stretch}.actions{flex-direction:column}.actions .btn{width:100%}.foot{flex-direction:column;justify-content:center;gap:8px}nav{gap:12px;font-size:14px}}