:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --border: #dfe3e8;
  --text: #1c2024;
  --muted: #6b7280;
  --accent: #1f5fd8;
  --accent-ink: #ffffff;
  --danger: #b42318;
  --danger-bg: #fef3f2;
  --warn: #b54708;
  --warn-bg: #fffaeb;
  --ok: #067647;
  --radius: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --surface: #1c1f24;
    --border: #2f343b;
    --text: #e6e8eb;
    --muted: #9aa1ab;
    --accent: #5b8def;
    --accent-ink: #0d1117;
    --danger: #f97066;
    --danger-bg: #2c1615;
    --warn: #f5b544;
    --warn-bg: #2a2113;
    --ok: #47cd89;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 1rem 4rem;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.masthead {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 0 1.25rem;
}

.masthead h1 {
  margin: 0 0 .3rem;
  font-size: 1.6rem;
  letter-spacing: -.01em;
}

.masthead p {
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
  font-size: .92rem;
}

/* ── Tabs ── */

.tabs {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  gap: .25rem;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.tab {
  appearance: none;
  border: 1px solid transparent;
  border-bottom: none;
  background: none;
  color: var(--muted);
  font: inherit;
  font-weight: 600;
  padding: .7rem 1.05rem;
  border-radius: var(--radius) var(--radius) 0 0;
  cursor: pointer;
  white-space: nowrap;
  margin-bottom: -1px;
}

.tab:hover { color: var(--text); }

.tab.is-active {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
  border-bottom: 1px solid var(--surface);
}

/* ── Panels ── */

main { max-width: 900px; margin: 0 auto; }

.panel { display: none; }
.panel.is-active { display: block; }

.panel-intro {
  margin: 1.4rem 0 1.2rem;
  max-width: 72ch;
  color: var(--muted);
  font-size: .92rem;
}

/* ── The two paste boxes ── */

.box {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.15rem 1.15rem;
  margin: 0 0 1rem;
}

.box-title {
  display: block;
  margin-bottom: .55rem;
  font-weight: 600;
  font-size: .84rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--muted);
}

textarea, input {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .6rem .7rem;
  width: 100%;
}

textarea {
  resize: vertical;
  line-height: 1.55;
  min-height: 8rem;
}

textarea::placeholder { color: var(--muted); opacity: .75; }

textarea:focus, input:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
  border-color: var(--accent);
}

.box small {
  display: block;
  margin-top: .55rem;
  max-width: 78ch;
  font-size: .8rem;
  line-height: 1.5;
  color: var(--muted);
}

.box small.warn { color: var(--warn); }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .92em;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0 .25em;
}

/* ── Actions ── */

.actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: .35rem 0 1rem;
}

.create {
  appearance: none;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: var(--accent-ink);
  font: inherit;
  font-weight: 700;
  padding: .7rem 2.2rem;
  cursor: pointer;
}

.create:hover { filter: brightness(1.08); }
.create:disabled { opacity: .6; cursor: progress; }

.status { font-size: .88rem; color: var(--muted); }
.status.is-error { color: var(--danger); font-weight: 600; }
.status.is-warn { color: var(--warn); font-weight: 600; }
.status.is-ok { color: var(--ok); font-weight: 600; }

/* ── Result ── */

.result {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.15rem 1.15rem;
  margin-bottom: 2rem;
}

.result-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-bottom: .8rem;
  border-bottom: 1px solid var(--border);
}

.result-head strong {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .86rem;
  word-break: break-all;
}

.download, .regen {
  appearance: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font: inherit;
  font-weight: 600;
  font-size: .84rem;
  padding: .45rem 1rem;
  cursor: pointer;
  white-space: nowrap;
}

.download:hover, .regen:hover { border-color: var(--accent); color: var(--accent); }

/* ── Missing-field banner ── */

.missing {
  margin: .9rem 0 0;
  padding: .8rem 1rem;
  border: 1px solid var(--warn);
  background: var(--warn-bg);
  border-radius: 6px;
  font-size: .86rem;
}

.missing.is-critical {
  border-color: var(--danger);
  background: var(--danger-bg);
}

.missing strong { display: block; margin-bottom: .4rem; color: var(--warn); }
.missing.is-critical strong { color: var(--danger); }

.missing ul { margin: 0; padding-left: 1.2rem; }
.missing li.is-critical { color: var(--danger); font-weight: 600; }

.missing-help {
  margin: .6rem 0 0;
  color: var(--muted);
  font-size: .8rem;
}

/* ── "Đã tự điền" banner — a value the app supplied, not one the user gave ── */

.assumed {
  margin: .7rem 0 0;
  padding: .7rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 6px;
  font-size: .84rem;
}

.assumed strong { display: block; margin-bottom: .35rem; color: var(--accent); }
.assumed ul { margin: 0; padding-left: 1.2rem; color: var(--muted); }

/* ── "Số liệu chưa khớp" banner — nothing missing, but two numbers disagree ── */

.inconsistent {
  margin: .7rem 0 0;
  padding: .7rem 1rem;
  border: 1px solid var(--warn);
  background: var(--warn-bg);
  border-radius: 6px;
  font-size: .84rem;
}

.inconsistent strong { display: block; margin-bottom: .35rem; color: var(--warn); }
.inconsistent ul { margin: 0; padding-left: 1.2rem; }

/* ── Derived-value summary ── */

.summary {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .3rem 1rem;
  margin: 1rem 0 0;
  font-size: .86rem;
}

.summary dt { color: var(--muted); }
.summary dd { margin: 0; font-weight: 600; }
.summary dd.is-missing { color: var(--danger); font-weight: 700; }

/* ── Review card ── */

.review {
  margin-top: 1.1rem;
  border-top: 1px solid var(--border);
  padding-top: .9rem;
}

.review > summary {
  cursor: pointer;
  font-weight: 600;
  font-size: .88rem;
  color: var(--accent);
}

/* Grouped like the document itself: a heading per block, then "Nhãn: [ô nhập]" rows. */

.review-group { margin: 1.1rem 0 0; }

.review-group h4 {
  margin: 0 0 .55rem;
  padding-bottom: .3rem;
  border-bottom: 1px solid var(--border);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--muted);
}

.review-rows { display: flex; flex-direction: column; gap: .4rem; }

.review-row {
  display: grid;
  grid-template-columns: 13rem 1fr;
  align-items: center;
  gap: .3rem .9rem;
  font-size: .82rem;
  font-weight: 600;
  color: var(--muted);
}

@media (max-width: 640px) {
  .review-row { grid-template-columns: 1fr; gap: .25rem; }
}

.review-label { line-height: 1.3; }

.review-value input { font-weight: 400; font-size: .9rem; }

.review-value small {
  display: block;
  margin-top: .2rem;
  font-size: .74rem;
  font-weight: 600;
  color: var(--accent);
}

.review-row.is-missing { color: var(--danger); }
.review-row.is-missing input { border-color: var(--danger); }

.review-row.is-assumed input { border-color: var(--accent); }

.review-row.is-check .review-value input { width: auto; }

/* ── Read-only scope preview ── */

.scope-preview {
  margin: 0 0 1rem;
  padding: .8rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: .85rem;
}

.scope-title {
  display: block;
  margin-bottom: .5rem;
  font-weight: 600;
  font-size: .78rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--muted);
}

.scope-preview table {
  width: 100%;
  border-collapse: collapse;
}

.scope-preview th, .scope-preview td {
  text-align: left;
  padding: .3rem .5rem .3rem 0;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.scope-preview th {
  font-size: .76rem;
  text-transform: uppercase;
  letter-spacing: .03em;
  color: var(--muted);
}

.scope-preview ul { margin: 0; padding-left: 1.1rem; }
.scope-preview ul ul { margin-top: .2rem; list-style: circle; }

.scope-preview small {
  display: block;
  margin-top: .6rem;
  color: var(--muted);
  font-size: .78rem;
}

footer {
  max-width: 900px;
  margin: 1rem auto 0;
  color: var(--muted);
  font-size: .8rem;
}