:root{
  --paper:#faf7f0; --card:#fffdf8; --ink:#2b2620; --muted:#8a7f6d;
  --red:#b03a2e; --red-soft:#f6e3df; --line:#e6ddcd; --gold:#c8963e;
  --done:#3e7d4e;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;min-height:100vh;display:flex;flex-direction:column}
a{color:var(--red)}
button{font-family:inherit;cursor:pointer}
select{padding:7px 8px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);font-size:14px}

.topbar{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 28px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:14px}
.seal{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;background:var(--red);color:#fff;font-family:"Noto Serif SC","Songti SC",serif;font-size:26px;font-weight:700;border-radius:8px;box-shadow:0 2px 8px rgba(176,58,46,.3)}
.brand h1{margin:0;font-family:"Noto Serif SC","Songti SC",serif;font-size:26px;letter-spacing:2px}
.brand p{margin:2px 0 0;color:var(--muted);font-size:13px}
.top-actions{display:flex;align-items:center;gap:12px}
.ghost-btn{background:transparent;border:1px solid var(--line);border-radius:8px;padding:7px 14px;font-size:14px;color:var(--ink)}
.ghost-btn:hover{border-color:var(--red);color:var(--red)}
.primary-btn{background:var(--red);color:#fff;border:0;border-radius:8px;padding:10px 22px;font-size:15px}
.primary-btn:hover{background:#933025}
.primary-btn:disabled,.ghost-btn:disabled{opacity:.5;cursor:default}

main{flex:1;width:100%;max-width:880px;margin:0 auto;padding:28px 20px 40px}
.intro{color:var(--muted);font-size:15px;line-height:1.7;margin:0 0 22px}
.intro strong{color:var(--ink)}

.dropzone{background:var(--card);border:2px dashed var(--line);border-radius:14px;padding:36px 20px 28px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s;outline:none}
.dropzone:hover,.dropzone:focus{border-color:var(--gold)}
.dropzone.dragging{border-color:var(--red);background:var(--red-soft)}
.dz-icon{font-size:38px;line-height:1}
.dz-title{font-family:"Noto Serif SC","Songti SC",serif;font-size:21px;letter-spacing:1px;margin:12px 0 2px}
.dz-or{color:var(--muted);font-size:13px;margin:6px 0 12px}
.dz-hint{color:var(--muted);font-size:12px;margin:14px 0 0}

.controls{display:flex;flex-wrap:wrap;gap:18px 28px;align-items:flex-end;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 20px;margin-top:20px}
.control{display:flex;flex-direction:column;gap:8px}
.control label{font-size:13px;color:var(--muted);font-weight:600}
.control input[type=range]{width:200px;accent-color:var(--red)}
.qval{color:var(--red);font-weight:700}
.controls-note{flex-basis:100%;margin:0;color:var(--muted);font-size:12px}

.summary{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 20px;margin-top:20px;font-size:15px}
.summary[hidden]{display:none}
.summary-actions{display:flex;gap:10px}
.summary .save-pct{color:var(--done);font-weight:700}

.empty{color:var(--muted);text-align:center;font-size:14px;margin:34px 0 0}

.results{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px;margin-top:20px}
.result-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px;display:flex;flex-direction:column;gap:8px}
.result-card .thumb{width:100%;height:150px;object-fit:contain;background:var(--paper);border:1px solid var(--line);border-radius:8px}
.result-card .fname{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.result-card .sizes{font-size:13px;color:var(--muted);line-height:1.6;margin:0}
.result-card .sizes .after{color:var(--ink);font-weight:600}
.badge{align-self:flex-start;border-radius:20px;padding:2px 10px;font-size:12px;font-weight:700;background:#e4efe6;color:var(--done)}
.badge.bigger{background:var(--red-soft);color:var(--red)}
.badge.working{background:#f3e8cf;color:var(--gold)}
.badge.error{background:var(--red-soft);color:var(--red)}
.card-note{font-size:12px;color:var(--gold);margin:0}
.card-error{font-size:12px;color:var(--red);margin:0}
.result-card .dl-btn{margin-top:auto}

footer{border-top:1px solid var(--line);padding:20px 28px;text-align:center;color:var(--muted);font-size:13px}
.foot-links{display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:center;align-items:center;margin-bottom:12px}
.foot-label{font-weight:600;color:var(--ink)}
.foot-links a{color:var(--muted);text-decoration:none}
.foot-links a:hover{color:var(--red);text-decoration:underline}

@media (max-width:560px){
  main{padding:20px 14px 32px}
  .control input[type=range]{width:160px}
  .summary{flex-direction:column;align-items:flex-start}
}