:root{--bg:#f4f6fa;--card:#fff;--fg:#1d2433;--mut:#6b7385;--line:#dde2ec;--pri:#1f45c8;--pri2:#1938a3;--err:#c62828;--ok:#2e7d32;--warn:#a15c00}
@media (prefers-color-scheme:dark){:root{--bg:#141820;--card:#1d222d;--fg:#e6e9f0;--mut:#9aa3b5;--line:#2e3545;--pri:#4d7dff;--pri2:#3a66e0}}
*{box-sizing:border-box}
body{margin:0;font:15px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--fg);min-height:100vh;display:flex;flex-direction:column}
.top{display:flex;align-items:center;gap:1rem;flex-wrap:wrap;padding:.7rem 1.2rem;background:var(--card);border-bottom:1px solid var(--line)}
.brand{font-weight:700;font-size:1.1rem}
nav{display:flex;gap:.3rem;flex-wrap:wrap;margin-left:auto}
nav a{color:var(--fg);text-decoration:none;padding:.4rem .7rem;border-radius:6px}
nav a.on,nav a:hover{background:var(--bg)}
main{flex:1;width:100%;max-width:1200px;margin:0 auto;padding:1rem}
footer{text-align:center;color:var(--mut);font-size:.8rem;padding:1rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:1.1rem 1.2rem;margin-bottom:1rem}
.narrow{max-width:380px;margin:3rem auto}
h2{margin:.1rem 0 .8rem;font-size:1.2rem}h3{font-size:1rem;margin:1rem 0 .5rem}
label{display:flex;flex-direction:column;gap:.25rem;margin-bottom:.7rem;font-weight:500;flex:1;min-width:120px}
label.chk{flex-direction:row;align-items:center;gap:.5rem;font-weight:400}
input,select,textarea{font:inherit;padding:.45rem .55rem;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--fg)}
input[type=color]{padding:2px;height:2.3rem}
textarea{resize:vertical}
small,.muted{color:var(--mut);font-weight:400}.small{font-size:.85rem}
.row{display:flex;gap:1rem;flex-wrap:wrap;align-items:flex-start}
.grid2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:1rem}
@media (max-width:800px){.grid2{grid-template-columns:1fr}}
fieldset{border:1px solid var(--line);border-radius:8px;margin:0 0 .8rem;padding:.6rem .8rem}
legend{font-weight:600;padding:0 .3rem}
.btn{display:inline-block;font:inherit;padding:.5rem .9rem;border-radius:6px;border:1px solid var(--line);background:var(--bg);color:var(--fg);cursor:pointer;text-decoration:none}
.btn:hover{border-color:var(--pri)}
.btn.primary{background:var(--pri);border-color:var(--pri);color:#fff}.btn.primary:hover{background:var(--pri2)}
.btn.danger{color:var(--err)}
.btn:disabled{opacity:.6;cursor:wait}
.toolbar{display:flex;gap:.5rem;flex-wrap:wrap;align-items:center;margin:.3rem 0 .8rem}
.badge{background:var(--bg);border:1px solid var(--line);border-radius:20px;padding:.3rem .7rem;font-size:.85rem;margin-right:auto}
.flash{padding:.6rem .8rem;border-radius:6px;margin-bottom:.6rem;border:1px solid}
.flash.err{color:var(--err);border-color:var(--err)}.flash.ok{color:var(--ok);border-color:var(--ok)}
.warn{color:var(--warn);font-size:.85rem;margin:.2rem 0}
.drop{flex:2;min-width:240px;border:2px dashed var(--line);border-radius:10px;padding:1.6rem;text-align:center;cursor:pointer;color:var(--mut)}
.drop strong{display:block;color:var(--fg);font-size:1.05rem}
.drop.hover,.drop:hover{border-color:var(--pri);color:var(--fg)}.drop.busy{opacity:.6}
.files{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1rem}
.fileCard{border:1px solid var(--line);border-radius:8px;padding:.6rem;background:var(--bg)}
.fname{font-weight:600;margin-bottom:.4rem;word-break:break-all}
.pageWrap{position:relative;width:100%;background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.2);user-select:none;touch-action:none}
.pageWrap .page{width:100%;height:100%;display:block}
.stampOv{position:absolute;cursor:move;outline:1px dashed rgba(31,69,200,.6);touch-action:none}
.stampOv img{width:100%;height:100%;display:block;pointer-events:none;opacity:.92}
.handle{position:absolute;right:-7px;bottom:-7px;width:14px;height:14px;background:var(--pri);border:2px solid #fff;border-radius:3px;cursor:nwse-resize}
ul.dl{list-style:none;padding:0;display:flex;flex-direction:column;gap:.4rem}
.stampPreview{background:#fff;border:1px solid var(--line);border-radius:8px;padding:1rem;text-align:center}
.stampPreview img{max-width:100%}
.sticky{position:sticky;top:1rem;align-self:start}
code{background:var(--bg);padding:0 .25rem;border-radius:3px}
.block{border:1px solid var(--line);border-radius:8px;margin-bottom:.5rem;background:var(--bg)}
.block summary{display:flex;align-items:center;gap:.6rem;padding:.45rem .6rem;cursor:pointer;list-style:none}
.block summary::-webkit-details-marker{display:none}
.block summary::before{content:"▸";color:var(--mut);transition:transform .15s}
.block[open] summary::before{transform:rotate(90deg)}
.btype{font-weight:600;white-space:nowrap}
.bsum{color:var(--mut);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0;font-size:.9rem}
.bact{display:flex;gap:.2rem}
.ib{font:inherit;font-size:.8rem;width:1.9rem;height:1.9rem;border:1px solid var(--line);border-radius:5px;background:var(--card);color:var(--fg);cursor:pointer}
.ib:hover:not(:disabled){border-color:var(--pri)}.ib:disabled{opacity:.35;cursor:default}
.ib.del{color:var(--err)}.ib.del:hover{border-color:var(--err)}
.bbody{display:flex;flex-wrap:wrap;gap:0 1rem;padding:.3rem .8rem .6rem;border-top:1px solid var(--line)}
.bbody .wide{flex-basis:100%}
.optcolor{display:flex;align-items:center;gap:.5rem}
.addRow{display:flex;gap:.5rem;margin:.6rem 0 1rem;flex-wrap:wrap}
.addRow select{flex:1;min-width:150px}
footer a{color:inherit}
.stampGrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1rem}
.stampCard{border:1px solid var(--line);border-radius:8px;padding:.7rem;background:var(--bg);display:flex;flex-direction:column;gap:.3rem}
.stampCard .thumb{background:#fff;border-radius:6px;padding:.6rem;height:150px;display:flex;align-items:center;justify-content:center}
.stampCard .thumb img{max-width:100%;max-height:100%}
.sname{font-weight:600}
.sact{display:flex;gap:.3rem;flex-wrap:wrap;margin-top:.3rem}
.ib2{padding:.45rem .6rem}
.btn:disabled{opacity:.4;cursor:default}
.vexplain ul{margin:.3rem 0 .6rem}
.version .vhead{display:flex;gap:.8rem;align-items:baseline;flex-wrap:wrap}
.version .vhead .badge{margin-right:0}
.vnum{font-weight:700;font-size:1.15rem;color:var(--pri)}
.vtitle{font-weight:600;flex:1}
.version ul{margin:.5rem 0 0;padding-left:1.2rem}
.version.current{border-color:var(--pri)}
.stampPick{display:flex;flex-direction:column;gap:.25rem;margin-bottom:.7rem;font-weight:500;flex:1;min-width:180px}
.edHead{display:flex;align-items:center;gap:1rem;margin-bottom:.6rem}.edHead h2{margin:0}
.imgEd{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:1rem}
@media (max-width:900px){.imgEd{grid-template-columns:1fr}}
.elTools{margin-top:.2rem}.elTools .btn{padding:.35rem .6rem;font-size:.9rem}
.canvasWrap{background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:1rem}
.canvas,.checker{background-color:#fff;background-image:linear-gradient(45deg,#eee 25%,transparent 25%),linear-gradient(-45deg,#eee 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#eee 75%),linear-gradient(-45deg,transparent 75%,#eee 75%);background-size:16px 16px;background-position:0 0,0 8px,8px -8px,-8px 0}
.canvas{position:relative;width:100%;user-select:none;touch-action:none}
.canvas #bg{width:100%;height:100%;display:block;pointer-events:none}
.el{position:absolute;border:1.5px dashed #1f45c8;background:rgba(31,69,200,.08);cursor:move;font:11px/1.1 system-ui,sans-serif;color:#1f45c8;display:flex;align-items:center;justify-content:center;overflow:hidden;white-space:nowrap;touch-action:none}
.el.check{border-style:solid;background:rgba(31,69,200,.12)}
.el.field{border-color:#d32f2f;color:#d32f2f;background:rgba(211,47,47,.08);justify-content:flex-start;padding-left:3px}
.el.date{font-weight:700}
.el.cover{background:rgba(255,255,255,.92);border-color:#888;color:#888}
.el.sel{outline:2px solid #ff9800;outline-offset:1px;z-index:5}
.el .h{position:absolute;right:-1px;bottom:-1px;width:10px;height:10px;background:#ff9800;cursor:nwse-resize}
.props{border:1px solid var(--line);border-radius:8px;padding:.6rem .8rem;margin:.6rem 0;background:var(--bg)}
.props .row{align-items:flex-end}
.props h3{margin:.1rem 0 .5rem}
.imgProc{margin:.8rem 0;border:1px solid var(--line);border-radius:8px;padding:.5rem .8rem}
.imgProc summary{cursor:pointer;font-weight:600}
input[type=range]{padding:0}