:root{
  --bg:#f3f6f6;
  --card:#ffffff;
  --ink:#16292b;
  --muted:#5b6f71;
  --line:#d6e1e2;
  --accent:#0f766e;
  --accent-ink:#ffffff;
  --accent-soft:#e3f2f0;
  --danger:#b42318;
  --danger-soft:#fdecea;
  --ok:#067647;
  --ok-soft:#e6f6ec;
  --warn:#8a5a00;
  --warn-soft:#fff4dc;
  --radius:12px;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0f1b1c;
    --card:#172526;
    --ink:#e6f0f0;
    --muted:#9bb2b3;
    --line:#2b3f40;
    --accent:#2dd4bf;
    --accent-ink:#052421;
    --accent-soft:#143b38;
    --danger:#ff8a80;
    --danger-soft:#3a1d1b;
    --ok:#6ee7a8;
    --ok-soft:#14331f;
    --warn:#fcd34d;
    --warn-soft:#3a2f10;
  }
}
:root[data-theme="dark"]{
  --bg:#0f1b1c;--card:#172526;--ink:#e6f0f0;--muted:#9bb2b3;--line:#2b3f40;
  --accent:#2dd4bf;--accent-ink:#052421;--accent-soft:#143b38;
  --danger:#ff8a80;--danger-soft:#3a1d1b;--ok:#6ee7a8;--ok-soft:#14331f;--warn:#fcd34d;--warn-soft:#3a2f10;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:Tahoma,"Segoe UI",Arial,sans-serif;
  font-size:15px;
  line-height:1.7;
  min-height:100vh;
}
[hidden]{display:none !important}
h1,h2,h3{margin:.2em 0 .5em;line-height:1.4}
h2{font-size:18px}
h3{font-size:15px;color:var(--muted)}
.muted{color:var(--muted)}
.small{font-size:13px}
.err{color:var(--danger)}
.nojs{padding:24px;text-align:center}

/* ----- کارت و دکمه ----- */
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:18px;
  margin-bottom:16px;
  box-shadow:0 1px 2px rgba(0,0,0,.04);
}
.btn{
  font:inherit;
  border:1px solid transparent;
  border-radius:9px;
  padding:9px 16px;
  cursor:pointer;
  background:var(--card);
  color:var(--ink);
  border-color:var(--line);
  transition:background .15s;
}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);font-weight:bold}
.btn.primary:hover:not(:disabled){filter:brightness(1.07)}
.btn.ghost{background:transparent}
.btn.small{padding:5px 11px;font-size:13px}
.btn.wide{width:100%;margin-top:12px}
.btn.danger{color:var(--danger)}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px;justify-content:flex-start}

/* ----- ورودی‌ها ----- */
input,select{
  font:inherit;
  width:100%;
  padding:9px 11px;
  border:1px solid var(--line);
  border-radius:9px;
  background:var(--card);
  color:var(--ink);
  direction:ltr;
  text-align:right;
}
select{direction:rtl}
label{display:block;margin:10px 0 4px;color:var(--muted);font-size:13px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-items:end}
.align-end{align-self:end;padding-bottom:10px}

/* ----- هدر و تب‌ها ----- */
.topbar{
  display:flex;justify-content:space-between;align-items:center;
  padding:12px 16px;background:var(--card);border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:5;
}
.brand{display:flex;align-items:center;gap:10px}
.brand strong{display:block;font-size:16px}
.brand small{color:var(--muted)}
.brand-mark{
  display:inline-grid;place-items:center;
  width:56px;height:56px;border-radius:14px;background:var(--accent);color:var(--accent-ink);
  font-size:26px;font-weight:bold;
}
.brand-mark.sm{width:36px;height:36px;font-size:18px;border-radius:10px}
.tabs{
  display:flex;gap:4px;overflow-x:auto;padding:10px 12px 0;
  background:var(--card);border-bottom:1px solid var(--line);
}
.tab{
  border:0;background:transparent;color:var(--muted);font:inherit;
  padding:10px 14px;cursor:pointer;border-bottom:3px solid transparent;white-space:nowrap;
}
.tab.active{color:var(--accent);border-bottom-color:var(--accent);font-weight:bold}
.content{padding:16px;max-width:1200px;margin:0 auto}
.pane{display:none}
.pane.active{display:block}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}

/* ----- پیش‌نمایش ----- */
.preview{border:1px dashed var(--line);border-radius:10px;padding:8px;background:#fff}
.preview canvas{width:100%;height:auto;display:block}

/* ----- بررسی و نتیجه ----- */
.check-box{margin-top:12px;padding:10px 12px;border-radius:10px;background:var(--accent-soft);font-size:14px}
.check-box.bad{background:var(--danger-soft);color:var(--danger)}
.check-box.good{background:var(--ok-soft);color:var(--ok)}
.check-box ul{margin:6px 0 0;padding-right:18px}
.result{margin-top:14px;padding:12px;border-radius:10px;background:var(--ok-soft);color:var(--ok)}
.result a{color:inherit;font-weight:bold}

/* ----- سریال آزاد ----- */
.free-grid{display:grid;gap:10px}
.free-item{display:grid;grid-template-columns:70px 1fr;gap:10px;align-items:center}
.free-item .hint{grid-column:2;font-size:13px;min-height:20px;color:var(--muted)}
.free-item .hint.good{color:var(--ok)}
.free-item .hint.bad{color:var(--danger)}
.free-item .hint.warn{color:var(--warn)}
.free-item .idx{color:var(--muted);font-size:13px}
.free-item input{font-size:18px;letter-spacing:2px}
.free-item.dup input{border-color:var(--danger)}

/* ----- بایگانی ----- */
.search-row{grid-template-columns:1fr auto auto}
.list{margin-top:12px;display:grid;gap:10px}
.batch{border:1px solid var(--line);border-radius:10px;padding:12px 14px}
.batch-head{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;align-items:center}
.batch-meta{color:var(--muted);font-size:13px}
.batch-serials{margin-top:8px;font-family:Consolas,monospace;direction:ltr;text-align:left;font-size:13px;color:var(--muted);word-break:break-all}
.badge{display:inline-block;padding:1px 9px;border-radius:99px;background:var(--accent-soft);color:var(--accent);font-size:12px;font-weight:bold}

/* ----- تنظیمات ----- */
.table-wrap{overflow-x:auto}
.rtable{width:100%;border-collapse:collapse;min-width:720px}
.rtable th,.rtable td{padding:6px 6px;border-bottom:1px solid var(--line);text-align:right;vertical-align:middle}
.rtable th{color:var(--muted);font-size:13px;font-weight:normal}
.rtable input,.rtable select{padding:6px 8px;font-size:14px}
.rtable td.ltr input{direction:ltr;text-align:left;font-family:Consolas,monospace}

/* ----- ورود ----- */
.login-wrap{min-height:100vh;display:grid;place-items:center;padding:16px}
.login-card{width:100%;max-width:340px;text-align:center}
.login-card .brand-mark{margin:4px auto 8px}
.login-card input{text-align:center;font-size:22px;letter-spacing:6px}

/* ----- پیام کوتاه ----- */
.toast{
  position:fixed;bottom:18px;left:50%;transform:translateX(-50%);
  background:var(--ink);color:var(--card);padding:10px 18px;border-radius:10px;
  box-shadow:0 6px 24px rgba(0,0,0,.2);z-index:50;max-width:92vw;text-align:center;
}

@media (max-width: 860px){
  .grid-2{grid-template-columns:1fr}
  .content{padding:12px}
  .row{grid-template-columns:1fr}
  .search-row{grid-template-columns:1fr}
  .card{padding:14px}
}