/* ---------- Tokens ---------- */
:root{
  --bg:#f6f7f9; --panel:#ffffff; --panel-2:#f0f2f5;
  --text:#14171c; --muted:#666f7d; --line:#e2e6ec;
  --accent:#3b6cf6; --accent-soft:#e8eeff;
  --good:#0f9d58; --warn:#d97706; --danger:#d63b3b;
  --radius:14px; --shadow:0 1px 2px rgba(16,24,40,.06),0 8px 24px rgba(16,24,40,.06);
  color-scheme:light dark;
}
:root[data-theme="dark"]{
  --bg:#0e1116; --panel:#161a21; --panel-2:#1d222b;
  --text:#e8ecf2; --muted:#98a2b3; --line:#262c36;
  --accent:#5b8cff; --accent-soft:#1b2540;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px rgba(0,0,0,.35);
}

*{box-sizing:border-box}
body{
  margin:0; background:var(--bg); color:var(--text);
  font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{margin:0;line-height:1.25}
.muted{color:var(--muted)}
.small{font-size:12.5px}
.center{text-align:center}
main{max-width:1000px;margin:0 auto;padding:0 20px 60px}

/* ---------- Topbar ---------- */
.topbar{
  max-width:1000px;margin:0 auto;padding:26px 20px 18px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{display:flex;align-items:center;gap:14px}
.logo{font-size:32px;line-height:1}
.topbar h1{font-size:21px;letter-spacing:-.02em}
.tag{margin:2px 0 0;color:var(--muted);font-size:13px}

/* ---------- Buttons ---------- */
button{font:inherit;cursor:pointer;border-radius:10px;transition:.15s}
.primary-btn{
  background:var(--accent);color:#fff;border:none;padding:11px 22px;font-weight:600;
}
.primary-btn:hover:not(:disabled){filter:brightness(1.08)}
.secondary-btn{
  background:var(--panel-2);color:var(--text);border:1px solid var(--line);padding:11px 18px;font-weight:500;
}
.secondary-btn:hover:not(:disabled){border-color:var(--accent)}
.ghost-btn{background:transparent;border:1px solid var(--line);color:var(--muted);padding:8px 14px}
.ghost-btn:hover{color:var(--text);border-color:var(--accent)}
.ghost-btn.small{padding:5px 11px;font-size:12.5px}
.link-btn{background:none;border:none;color:var(--accent);padding:0;text-decoration:underline;font-weight:500}
button:disabled{opacity:.45;cursor:not-allowed}

/* ---------- Dropzone ---------- */
.dropzone{
  border:2px dashed var(--line); border-radius:var(--radius); background:var(--panel);
  padding:44px 20px; text-align:center; transition:.18s; outline:none;
}
.dropzone:hover,.dropzone:focus-visible{border-color:var(--accent);background:var(--accent-soft)}
.dropzone.drag{border-color:var(--accent);background:var(--accent-soft);transform:scale(1.005)}
.dz-icon{font-size:38px;margin-bottom:6px}
.dropzone h2{font-size:18px;margin-bottom:6px}
.dropzone p{margin:4px 0;color:var(--muted);font-size:13.5px}

/* ---------- Panel ---------- */
.panel{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;margin-top:18px;box-shadow:var(--shadow);
}
.panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.panel-head h3{font-size:15px}
.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field.span2{grid-column:1/-1}
label{font-size:13px;font-weight:600}
select,input[type="number"]{
  background:var(--panel-2);color:var(--text);border:1px solid var(--line);
  border-radius:9px;padding:9px 10px;font:inherit;font-size:14px;width:100%;
}
select:focus,input:focus{outline:2px solid var(--accent);outline-offset:0}
.hint{font-size:12px;color:var(--muted)}
.checks{gap:10px;justify-content:center}
.check{display:flex;align-items:center;gap:8px;font-weight:400;font-size:13.5px;cursor:pointer}
.check input{accent-color:var(--accent);width:15px;height:15px}

input[type="range"]{width:100%;accent-color:var(--accent)}
#qualityOut{
  background:var(--accent-soft);color:var(--accent);border-radius:6px;
  padding:1px 8px;font-weight:700;font-size:12.5px;margin-left:6px;
}
.range-legend{display:flex;justify-content:space-between;font-size:11.5px;color:var(--muted)}

.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px;padding-top:18px;border-top:1px solid var(--line)}

/* ---------- Summary ---------- */
.summary[hidden]{display:none}
.summary{
  display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:18px;
}
.stat{
  background:var(--panel);border:1px solid var(--line);border-radius:12px;
  padding:14px 16px;display:flex;flex-direction:column;gap:3px;
}
.stat.highlight{border-color:var(--good);background:linear-gradient(0deg,transparent,transparent)}
.stat-label{font-size:11.5px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.stat-val{font-size:19px;font-weight:700;letter-spacing:-.02em}
.stat.highlight .stat-val{color:var(--good)}

/* ---------- List ---------- */
.list{display:flex;flex-direction:column;gap:10px;margin-top:18px}
.item{
  background:var(--panel);border:1px solid var(--line);border-radius:12px;
  padding:12px;display:grid;grid-template-columns:56px 1fr auto;gap:14px;align-items:center;
}
.thumb{
  width:56px;height:56px;border-radius:9px;object-fit:cover;background:var(--panel-2);
  border:1px solid var(--line);
}
.meta{min-width:0}
.fname{font-weight:600;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.fsub{font-size:12.5px;color:var(--muted);margin-top:2px;display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.arrow{opacity:.6}
.badge{
  border-radius:20px;padding:1px 9px;font-size:11.5px;font-weight:700;
  background:var(--panel-2);color:var(--muted);
}
.badge.save{background:rgba(15,157,88,.14);color:var(--good)}
.badge.none{background:rgba(217,119,6,.14);color:var(--warn)}
.badge.err{background:rgba(214,59,59,.14);color:var(--danger)}
.badge.fmt{background:var(--accent-soft);color:var(--accent)}
.bar{height:4px;border-radius:4px;background:var(--panel-2);margin-top:8px;overflow:hidden}
.bar>i{display:block;height:100%;background:var(--good);width:0;transition:width .4s ease}
.row-actions{display:flex;gap:6px;align-items:center}
.spinner{
  width:16px;height:16px;border:2px solid var(--line);border-top-color:var(--accent);
  border-radius:50%;animation:spin .7s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- Modal ---------- */
.modal[hidden]{display:none}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.65);display:flex;align-items:center;justify-content:center;padding:20px;z-index:50}
.modal-box{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);max-width:900px;width:100%;padding:16px;box-shadow:var(--shadow)}
.modal-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.modal-head h3{font-size:15px}
.compare{position:relative;overflow:hidden;border-radius:10px;background:var(--panel-2);user-select:none;line-height:0;max-height:70vh}
.compare img{width:100%;display:block;max-height:70vh;object-fit:contain}
.cmp-clip{position:absolute;inset:0;width:50%;overflow:hidden}
.cmp-clip img{width:auto;height:100%;max-width:none}
.cmp-handle{position:absolute;top:0;bottom:0;left:50%;width:3px;background:#fff;cursor:ew-resize;transform:translateX(-1.5px)}
.cmp-handle span{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  background:#fff;color:#111;border-radius:50%;width:32px;height:32px;
  display:flex;align-items:center;justify-content:center;font-size:14px;line-height:1;
}
.cmp-tag{position:absolute;bottom:10px;background:rgba(0,0,0,.6);color:#fff;font-size:11.5px;padding:3px 9px;border-radius:20px;line-height:1.6}
.cmp-tag.left{left:10px} .cmp-tag.right{right:10px}

.footer{max-width:1000px;margin:0 auto;padding:0 20px 40px;color:var(--muted);font-size:12.5px;text-align:center}

@media (max-width:680px){
  .settings-grid{grid-template-columns:1fr}
  .summary{grid-template-columns:1fr 1fr}
  .item{grid-template-columns:44px 1fr;row-gap:10px}
  .thumb{width:44px;height:44px}
  .row-actions{grid-column:1/-1;justify-content:flex-end}
}