*{box-sizing:border-box}body{margin:0;background:#f4f2ed;color:#252a29;font:16px system-ui,-apple-system,sans-serif}
main{max-width:820px;margin:52px auto;padding:0 20px 32px}header{display:flex;align-items:center;gap:12px;color:#48635a;font-size:13px;font-weight:650;letter-spacing:.035em}
.mark{display:grid;place-items:center;width:32px;height:32px;background:#e3e9df;border:1px solid #cad4c6;border-radius:9px;font-size:21px;color:#315448}.header-line{height:1px;flex:1;background:#d8dcd2;margin-left:12px}
.lead{margin:36px 0 26px}.context{font-size:12px;color:#70786f;letter-spacing:.04em;margin:0 0 13px}h1{font-size:36px;letter-spacing:-.035em;line-height:1.12;margin:0 0 14px;font-weight:650}
#intro{color:#687067;max-width:610px;line-height:1.6;margin:0}p{overflow-wrap:anywhere}.workspace{background:#fffefb;border:1px solid #dfe2d8;border-radius:16px;padding:24px;box-shadow:0 12px 36px #34443305}
.form-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.form-head label{font-weight:620;font-size:16px}.format{font:11px ui-monospace,monospace;color:#68756a;border:1px solid #dde2d8;border-radius:5px;padding:4px 6px}
.helper{color:#7b8278;font-size:13px;line-height:1.6;margin:10px 0 16px}
.guide{margin:0 0 24px;padding:0 2px}.guide h2{font-size:13px;font-weight:600;color:#6b7969;margin:0 0 14px}.guide ol{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.guide li{display:flex;align-items:flex-start;gap:10px}.step{display:grid;place-items:center;flex-shrink:0;width:22px;height:22px;background:#e7ebdf;border:1px solid #d8dfcf;border-radius:50%;font-size:11px;font-weight:600;color:#50684c}.guide h3{font-size:13px;margin:2px 0 6px;font-weight:650}.guide p{font-size:12px;line-height:1.55;color:#7a8173;margin:0 0 7px}.guide a{font-size:12px;color:#426449;text-decoration:none}.guide a:hover{text-decoration:underline}
textarea{display:block;width:100%;resize:vertical;background:#f7f8f3;border:1px solid #e0e5d8;border-radius:10px;padding:16px;color:#304137;line-height:1.55;font:13px ui-monospace,SFMono-Regular,Consolas,monospace;outline:none;min-height:210px}
textarea:focus{border-color:#668b73;box-shadow:0 0 0 3px #315f4610}.file-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:17px 0 0;color:#70796e;font-size:12px}.file-row input{max-width:100%;font:inherit}
input::file-selector-button{background:#eaf0e3;color:#436049;border:0;border-radius:6px;padding:8px 11px;margin-right:9px;cursor:pointer}.form-bottom{border-top:1px solid #ebeee5;margin-top:24px;padding-top:20px;display:flex;align-items:center;justify-content:space-between;gap:20px}
#note{max-width:325px;color:#8a9085;font-size:12px;line-height:1.5;margin:0}button{border:0;border-radius:9px;background:#315b47;color:#fffefb;padding:13px 18px;font:600 14px system-ui,sans-serif;cursor:pointer;white-space:nowrap}
button:hover{background:#274b3a}button:disabled{opacity:.45;cursor:wait}.return-row{display:flex;align-items:center;gap:18px;justify-content:space-between;margin:20px 2px 0}.return-row a{color:#5d7160;text-decoration:none;font-size:13px}.return-row a:hover{text-decoration:underline}
.quiet{background:none;color:#788375;padding:5px;font-size:12px;font-weight:500}.quiet:hover{background:#e8ebdf}.received{display:flex;gap:18px;background:#e9eee2;border:1px solid #d9e0ce;border-radius:16px;padding:25px}
.received-icon{display:grid;place-items:center;flex-shrink:0;width:34px;height:34px;border-radius:50%;background:#d5e0c9;color:#396048;font-size:18px}.received h2{font-size:19px;margin:2px 0 9px;letter-spacing:-.02em}.received p{margin:6px 0;font-size:14px;line-height:1.55;color:#5f7058}
#account{font:13px ui-monospace,monospace;color:#3f5a43}.challenge-card{padding:24px;background:#f5ede0;border:1px solid #e4d8c6;border-radius:16px;margin-top:18px}.challenge-card p{color:#79694e;font-size:14px;line-height:1.6;margin:0 0 16px}.challenge-card button{background:#886a3f}
#notice,#status{font-size:13px;color:#8b6243;line-height:1.6}#notice:empty{display:none}[hidden]{display:none!important}@media(max-width:540px){main{margin:25px 14px;padding:0 0 32px}h1{font-size:28px}.lead{margin:28px 0 22px}.workspace{padding:18px}.form-bottom{align-items:stretch;flex-direction:column;gap:16px}.form-bottom button{width:100%}textarea{min-height:190px}.return-row{align-items:flex-start}.received{padding:19px;gap:12px}.guide ol{grid-template-columns:1fr;gap:13px}.guide p{margin-bottom:3px}}