:root{
  --bg:#E8EBEE; --panel:#FFFFFF; --ink:#101214; --muted:#5C646D; --line:#C6CCD2; --accent:#FFD400;
  --ok:#1B7F3B; --warn:#C77700; --warn-bg:#FFF3E0; --err:#C62828; --err-bg:#FDECEC; --info-bg:#EEF3FF;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font:15px/1.45 -apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
a{color:inherit}
button,input,select,textarea{font:inherit}
.hidden{display:none !important}

/* ---- chrome */
header.top{background:var(--ink);color:#fff;padding:0 24px;display:flex;align-items:center;gap:24px;height:52px;position:sticky;top:0;z-index:20}
header.top .brand{font-weight:700;letter-spacing:-.01em;font-size:18px}
header.top .brand span{color:var(--accent)}
header.top nav{display:flex;gap:2px;margin-left:8px}
header.top nav a{color:#D9DEE3;text-decoration:none;padding:15px 12px;font-weight:600;border-bottom:3px solid transparent}
header.top nav a.active{color:#fff;border-bottom-color:var(--accent)}
header.top nav a:hover{color:#fff}
header.top .user{margin-left:auto;color:#B8C0C8;font-size:13px;display:flex;gap:12px;align-items:center}
header.top .user a{color:#fff}
main.app{max-width:1240px;margin:0 auto;padding:24px 24px 80px}
h1{font-size:26px;line-height:1.1;margin:0 0 16px;font-weight:700;letter-spacing:-.01em}
h1 small{display:block;font-size:14px;font-weight:400;color:var(--muted);margin-top:6px}
h2{font-size:18px;margin:26px 0 10px}
h3{font-size:15px;margin:16px 0 8px}
.muted{color:var(--muted)}
.small{font-size:13px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.93em}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.right{margin-left:auto}

/* ---- panels & forms */
.panel{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:16px 18px;margin-top:16px}
.drop{margin-top:16px;border:2px dashed var(--line);border-radius:8px;background:var(--panel);padding:30px 24px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s}
.drop.over{border-color:var(--ink);background:#FFFBE0}
.drop strong{display:block;font-size:17px;margin-bottom:4px}
.drop span{color:var(--muted)}
.drop input{display:none}
.toolbar{position:sticky;top:52px;z-index:5;margin-top:16px;background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:12px 18px;display:flex;flex-wrap:wrap;gap:12px 22px;align-items:center}
.toolbar .count{font-size:16px;font-weight:700}
.toolbar .count em{font-style:normal;color:var(--muted);font-weight:400}
.btn{font-weight:700;border:2px solid var(--ink);border-radius:6px;padding:8px 16px;background:var(--accent);color:var(--ink);cursor:pointer;text-decoration:none;display:inline-block;line-height:1.2}
.btn:hover{background:#FFE35A}
.btn.secondary{background:#fff}
.btn.secondary:hover{background:#F1F3F5}
.btn.small{padding:4px 10px;font-size:13px;border-width:1.5px}
.btn.danger{border-color:var(--err);color:var(--err);background:#fff}
.btn.danger:hover{background:var(--err-bg)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn:focus-visible,.drop:focus-visible{outline:3px solid var(--ink);outline-offset:2px}
input[type=text],input[type=number],input[type=date],input[type=search],select,textarea{padding:6px 9px;border:1px solid var(--line);border-radius:6px;background:#fff}
input.w-weight{width:82px;text-align:right}
label.chk{display:inline-flex;align-items:center;gap:7px;cursor:pointer;white-space:nowrap}
.field{display:flex;flex-direction:column;gap:4px;margin:8px 0}
.field > span{font-size:13px;color:var(--muted)}
.notice{margin-top:14px;padding:12px 16px;border-radius:8px;border:1px solid var(--line);background:var(--panel)}
.notice.warn{background:var(--warn-bg);border-color:#F2C27B}
.notice.err{background:var(--err-bg);border-color:#E8A0A0;color:#8A1C1C}
.notice.ok{background:#E8F5EC;border-color:#9FD3AF}
.notice.info{background:var(--info-bg);border-color:#B9C8F0}
.help{margin-top:14px;background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:12px 18px}
.help summary{cursor:pointer;font-weight:600}
.help ol{margin:10px 0 4px 18px;padding:0}
.help code{background:#F1F3F5;padding:1px 5px;border-radius:4px;font-size:.92em}

/* ---- tables */
table.grid{width:100%;border-collapse:collapse;background:var(--panel);border:1px solid var(--line);border-radius:8px;margin-top:12px;font-size:14px}
table.grid th,table.grid td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
table.grid th{font-size:12.5px;text-transform:uppercase;letter-spacing:.03em;color:var(--muted);background:#F6F7F9}
table.grid tr:last-child td{border-bottom:0}
table.grid tr.excluded td{background:var(--warn-bg)}
table.grid tr.blocked td{background:#FFF8E6}
table.grid tr.dim td{opacity:.55}
table.grid td.num{text-align:right;white-space:nowrap}
.band{margin-top:22px;padding:10px 14px;border-radius:8px;font-weight:700;display:flex;align-items:center;gap:12px}
.band.orange{background:#FFE1B3;color:#6B3E00}
.band.yellow{background:#FFF1B8;color:#5C4A00}
.band.green{background:#D6F0DD;color:#0E4D22}
.tag{display:inline-block;padding:1px 8px;border-radius:99px;font-size:12px;font-weight:600;background:#EEF0F2;color:var(--muted);white-space:nowrap}
.tag.ok{background:#D6F0DD;color:#0E4D22}
.tag.warn{background:#FFE1B3;color:#6B3E00}
.tag.err{background:#F8D3D3;color:#8A1C1C}
.tag.info{background:#DCE6FF;color:#1E3A8A}
.tag.tier{background:var(--ink);color:#fff}

/* ---- stock cards */
.cards{display:flex;gap:12px;flex-wrap:wrap;margin-top:12px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:12px 16px;min-width:150px}
.card .k{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.03em}
.card .v{font-size:26px;font-weight:700;line-height:1.1;margin-top:2px}
.card .v small{font-size:13px;color:var(--muted);font-weight:400}
.card.alert{border-color:#F2C27B;background:var(--warn-bg)}
.card.zero{border-color:#E8A0A0;background:var(--err-bg)}

/* ---- sheet preview grid */
.sheetpage{margin-top:14px}
.sheetpage h3{display:flex;align-items:center;gap:14px}
.stampgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
.stamp{border:2px solid var(--line);border-radius:6px;background:#fff;padding:6px;cursor:pointer;font-size:12px;position:relative;user-select:none}
.stamp img{width:100%;display:block;border:1px solid #eee;background:#fff}
.stamp .n{font-family:ui-monospace,Menlo,monospace;font-size:11px;margin-top:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.stamp .s{display:flex;justify-content:space-between;align-items:center;margin-top:3px}
.stamp.available{border-color:var(--ok)}
.stamp.used{border-color:#9AA3AB;opacity:.6}
.stamp.used img{filter:grayscale(1)}
.stamp.skip{border-color:var(--err);background:var(--err-bg)}
.stamp.problem{border-color:var(--err)}
.stamp .pos{position:absolute;top:4px;left:4px;background:var(--ink);color:#fff;font-size:10px;padding:0 5px;border-radius:99px}

/* ---- toast */
#toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:12px 18px;border-radius:8px;box-shadow:0 4px 18px rgba(0,0,0,.25);z-index:50;max-width:80vw;opacity:0;transition:opacity .2s;pointer-events:none}
#toast.show{opacity:1}
#toast.err{background:var(--err)}

/* ---- login */
body.login{display:flex;align-items:center;justify-content:center;min-height:100vh}
.login-box{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:34px 40px;text-align:center;max-width:420px}
.login-box h1 small{margin-bottom:22px}
.login-box .error{color:var(--err);margin:0 0 16px}

@media (max-width:760px){
  header.top{padding:0 12px;gap:10px;overflow-x:auto}
  header.top nav a{padding:15px 8px}
  main.app{padding:14px 12px 60px}
}