:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --text: #1c2430;
  --muted: #5b6776;
  --line: #d9dee5;
  --brand: #1f3a5f;
  --brand-2: #2c5d94;
  --up: #b3261e;
  --down: #1b7f3b;
  --err-bg: #fbe3e5;
  --err: #a1121f;
  --warn-bg: #fff4d1;
  --warn: #7a5600;
  --info-bg: #e7f0fb;
  --info: #1f4f8a;
  --ok-bg: #e3f4e6;
  --manual-bg: #e6eefb;
  --radius: 8px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  color: var(--text);
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
h1, h2 { margin: 0; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.hidden { display: none !important; }

button { font: inherit; cursor: pointer; border-radius: 6px; border: 1px solid var(--line); background: #fff; padding: .45rem .8rem; }
button:disabled { cursor: not-allowed; opacity: .55; }
.btn-primary { background: var(--brand); border-color: var(--brand); color: #fff; font-weight: 600; }
.btn-primary:hover:not(:disabled) { background: var(--brand-2); }
.btn-large { padding: .75rem 1.4rem; font-size: 1.05rem; }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.4); }
.btn-small { padding: .2rem .5rem; font-size: .85rem; }
input, select, textarea { font: inherit; color: inherit; }

/* top bar */
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  background: var(--brand); color: #fff; padding: .7rem 1.25rem; }
.brand { font-weight: 700; font-size: 1.1rem; }
.brand span { font-weight: 400; opacity: .85; margin-left: .35rem; }
main { max-width: 1800px; margin: 0 auto; padding: 1.25rem; }

/* input panels */
.inputs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.source { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; min-width: 0; }
.source h2 { font-size: 1.02rem; display: flex; align-items: center; gap: .5rem; }
.step { display: inline-grid; place-items: center; width: 1.6rem; height: 1.6rem; border-radius: 50%;
  background: var(--brand); color: #fff; font-size: .85rem; flex: none; }
.hint { color: var(--muted); margin: .4rem 0 .6rem; font-size: .9rem; }
textarea { width: 100%; min-height: 240px; resize: vertical; padding: .6rem; border: 1px solid var(--line);
  border-radius: 6px; font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace; font-size: .82rem;
  white-space: pre; overflow: auto; tab-size: 12; }
textarea:focus, input:focus, select:focus { outline: 2px solid var(--brand-2); outline-offset: 1px; }

.mapping:empty { display: none; }
.mapping { margin-top: .75rem; border-top: 1px dashed var(--line); padding-top: .75rem; }
.map-meta { display: flex; flex-wrap: wrap; gap: .4rem 1rem; align-items: center; font-size: .88rem; color: var(--muted); }
.map-grid { display: grid; grid-template-columns: 1fr; gap: .45rem; margin: .6rem 0; }
.map-field { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: .5rem; align-items: center;
  padding: .3rem .45rem; border-radius: 6px; font-size: .9rem; }
.map-field select { width: 100%; padding: .3rem; border: 1px solid var(--line); border-radius: 5px; background: #fff; }
.map-field.ambiguous { background: var(--warn-bg); }
.map-field.missing { background: var(--err-bg); }
.req { color: var(--err); }
.notes { margin: .4rem 0; padding: 0; list-style: none; font-size: .86rem; }
.notes li { background: var(--warn-bg); color: var(--warn); padding: .35rem .5rem; border-radius: 5px; margin-bottom: .3rem; }
.confirm-row { display: flex; gap: .5rem; align-items: center; margin: .3rem 0 .6rem; font-size: .88rem; }

.preview { width: 100%; border-collapse: collapse; font-size: .78rem; }
.preview th, .preview td { border: 1px solid var(--line); padding: .2rem .35rem; text-align: left; white-space: nowrap;
  max-width: 180px; overflow: hidden; text-overflow: ellipsis; }
.preview th { background: #eef1f5; font-weight: 600; }
.preview th .role { display: block; font-weight: 700; color: var(--brand); }
.preview .col-mapped { background: #eef5ff; }

.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; margin: 1.25rem 0; }

/* results */
#results { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; }
.summary { display: flex; flex-wrap: wrap; gap: .6rem; margin-bottom: .8rem; }
.stat { border: 1px solid var(--line); border-radius: 6px; padding: .45rem .8rem; min-width: 120px; background: #fafbfc;
  cursor: pointer; text-align: left; }
.stat b { display: block; font-size: 1.35rem; }
.stat.err b { color: var(--err); } .stat.warn b { color: var(--warn); } .stat.chg b { color: var(--down); }
.global-list { list-style: none; padding: 0; margin: 0 0 .8rem; font-size: .9rem; }
.global-list li { padding: .35rem .6rem; border-radius: 5px; margin-bottom: .3rem; }
.lvl-error { background: var(--err-bg); color: var(--err); }
.lvl-warning { background: var(--warn-bg); color: var(--warn); }
.lvl-info { background: var(--info-bg); color: var(--info); }
details { margin-bottom: .9rem; }
summary { cursor: pointer; font-weight: 600; padding: .3rem 0; }
.mini { border-collapse: collapse; font-size: .82rem; width: 100%; }
.mini th, .mini td { border-bottom: 1px solid var(--line); padding: .3rem .45rem; text-align: left; vertical-align: top; }
.mini th { background: #eef1f5; }

.toolbar { display: flex; flex-wrap: wrap; gap: .6rem; align-items: center; margin: .4rem 0; }
.toolbar input[type=search] { flex: 1 1 260px; max-width: 420px; padding: .45rem .6rem; border: 1px solid var(--line); border-radius: 6px; }
.toolbar select { padding: .45rem; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.spacer { flex: 1; }

.table-wrap { overflow-x: auto; max-width: 100%; }
.result-wrap { max-height: 75vh; overflow: auto; border: 1px solid var(--line); border-radius: 6px; }
#result-table { border-collapse: separate; border-spacing: 0; width: 100%; font-size: .85rem; }
#result-table th { position: sticky; top: 0; z-index: 1; background: var(--brand); color: #fff; text-align: left;
  padding: .5rem .45rem; font-weight: 600; white-space: nowrap; cursor: pointer; user-select: none; }
#result-table th.num { text-align: right; }
#result-table th .arrow { opacity: .8; margin-left: .2rem; }
#result-table td { border-bottom: 1px solid var(--line); padding: .35rem .45rem; vertical-align: top; background: #fff; }
#result-table td.num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
#result-table tr.st-error td { background: var(--err-bg); }
#result-table tr.st-warning td { background: #fffaea; }
#result-table tr.st-manual td { background: var(--manual-bg); }
#result-table tr.st-changed td { background: #f4fbf5; }
#result-table td.sell-new { font-weight: 700; }
#result-table tr.is-changed td.sell-new { background: #cdebd3; }
.up { color: var(--up); font-weight: 600; }
.down { color: var(--down); font-weight: 600; }
.zero { color: var(--muted); }
.cell-input { width: 6.5rem; text-align: right; padding: .2rem .35rem; border: 1px solid var(--line); border-radius: 4px;
  background: #fff; font-variant-numeric: tabular-nums; }
.cell-input.manual { border-color: var(--brand-2); background: #eaf2ff; font-weight: 700; }
.status-badge { display: inline-block; padding: .08rem .45rem; border-radius: 10px; font-size: .78rem; font-weight: 600; white-space: nowrap; }
.badge-error { background: var(--err); color: #fff; }
.badge-warning { background: #e0a800; color: #1c1c1c; }
.badge-manual { background: var(--brand-2); color: #fff; }
.badge-changed { background: var(--down); color: #fff; }
.badge-unchanged { background: #d5dae1; color: #333; }
.issue-list { list-style: none; margin: .25rem 0 0; padding: 0; font-size: .78rem; min-width: 260px; }
.issue-list li { margin: .1rem 0; }
.issue-list .i-error { color: var(--err); } .issue-list .i-warning { color: var(--warn); } .issue-list .i-info { color: var(--info); }
.change-text { color: var(--muted); font-size: .78rem; display: block; max-width: 260px; }

#toast { position: fixed; bottom: 1rem; right: 1rem; max-width: 90vw; background: #222; color: #fff; padding: .7rem 1rem;
  border-radius: 6px; opacity: 0; transition: opacity .2s; pointer-events: none; }
#toast.show { opacity: .95; }
#toast.error { background: var(--err); }

/* login */
.login-page { display: grid; place-items: center; min-height: 100vh; padding: 16px; }
.login-card { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 2rem; width: 100%; max-width: 380px; }
.login-card h1 { font-size: 1.2rem; color: var(--brand); }
.login-card h1 span { display: block; font-weight: 400; color: var(--text); font-size: 1rem; }
.login-card form { display: grid; gap: .6rem; margin-top: 1rem; }
.login-card input { padding: .6rem; border: 1px solid var(--line); border-radius: 6px; }
.login-error { background: var(--err-bg); color: var(--err); padding: .5rem .7rem; border-radius: 6px; }

@media (max-width: 1100px) {
  .inputs { grid-template-columns: 1fr; }
  textarea { min-height: 170px; }
}
@media (max-width: 600px) {
  main { padding: 16px; }
  .topbar { padding: .6rem 16px; }
  .brand span { display: none; }
  .map-field { grid-template-columns: 1fr; }
  .toolbar input[type=search] { max-width: none; }
  #btn-export { width: 100%; }
}