/* Pastel theme: lavender brand, mint/sky/butter/peach/rose for result groups.
   Deep tones carry text so every label keeps ≥ 4.5:1 contrast on its pastel fill. */
:root {
  color-scheme: light;
  --bg: #f6f4fb; --panel: #ffffff; --panel2: #faf8fe; --ink: #2d2a3e; --muted: #6a6680; --line: #e6e1f2;
  --lav: #b9a7ee; --lav-d: #5e4bb8; --lav-l: #efeafd;
  --mint: #bfe9d7; --mint-d: #23775a; --mint-l: #eaf8f1;
  --sky: #c8e3f8; --sky-d: #24669e; --sky-l: #edf6fd;
  --butter: #fdeeb3; --butter-d: #7d630c; --butter-l: #fff9e3;
  --peach: #ffd8c4; --peach-d: #a64f22; --peach-l: #fff1ea;
  --rose: #f9c9d6; --rose-d: #a2334f; --rose-l: #fdeef2;
  --shadow: 0 1px 2px rgba(60, 40, 120, .06), 0 6px 18px rgba(60, 40, 120, .06);
  --r: 14px;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font-family: 'IBM Plex Sans Thai', 'Sarabun', system-ui, sans-serif; background: var(--bg); color: var(--ink); font-size: 14px; line-height: 1.5; }
h1 { font-size: 18px; margin: 0; font-weight: 600; }
h2 { font-size: 16px; margin: 0 0 10px; font-weight: 600; color: var(--lav-d); }
h3 { font-size: 14px; margin: 0 0 8px; font-weight: 600; color: var(--lav-d); }
p { margin: 0 0 8px; }
button, select, input, textarea { font: inherit; color: inherit; }
button { border: 1px solid var(--line); background: #fff; border-radius: 10px; padding: 6px 12px; cursor: pointer; transition: background .15s, border-color .15s; }
button:hover { border-color: var(--lav); background: var(--lav-l); }
button.primary { background: var(--lav-d); border-color: var(--lav-d); color: #fff; }
button.primary:hover { background: #4f3ea3; }
button.soft { background: var(--lav-l); border-color: transparent; color: var(--lav-d); }
button.danger { color: var(--rose-d); }
button.icon { padding: 4px 8px; }
button:disabled { opacity: .5; cursor: default; }
input, select, textarea { border: 1px solid var(--line); border-radius: 9px; padding: 5px 8px; background: #fff; min-width: 0; }
input:focus, select:focus, textarea:focus, button:focus-visible { outline: 2px solid var(--lav); outline-offset: 1px; }
input[type=range] { padding: 0; accent-color: var(--lav-d); }
input[type=checkbox] { accent-color: var(--lav-d); }
label { font-size: 12px; color: var(--muted); }

.topbar { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 12px 16px; background: linear-gradient(120deg, #efe9ff 0%, #e7f6f0 55%, #fdf0e8 100%); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.logo-mark { width: 40px; height: 40px; border-radius: 12px; background: #fff; display: grid; place-items: center; box-shadow: var(--shadow); flex: none; }
.topbar .sub { font-size: 12px; color: var(--muted); }
.top-controls { display: flex; gap: 8px; align-items: center; }
.logos { display: flex; gap: 8px; background: #fff; border-radius: 10px; padding: 4px 10px; align-items: center; box-shadow: var(--shadow); }
.logos img { height: 32px; width: auto; display: block; }
.logos img + img { height: 24px; }
@media (max-width: 600px) { .logos img { height: 24px; } .logos img + img { height: 18px; } }
.rp-head .rp-logo { height: 40px; width: auto; }
.rp-head .rp-logo.sts { height: 28px; }
.tabs { display: flex; gap: 4px; padding: 8px 16px 0; background: var(--panel); border-bottom: 1px solid var(--line); overflow-x: auto; position: sticky; top: 0; z-index: 20; }
.tabs button { border: 0; border-radius: 10px 10px 0 0; padding: 9px 14px; white-space: nowrap; background: transparent; color: var(--muted); border-bottom: 3px solid transparent; }
.tabs button.active { color: var(--lav-d); font-weight: 600; border-bottom-color: var(--lav-d); background: var(--lav-l); }
main { padding: 16px; max-width: 1600px; margin: 0 auto; }
.tab { display: none; }
.tab.active { display: block; }

.grid { display: grid; gap: 14px; }
.cols-side { grid-template-columns: minmax(260px, 330px) minmax(0, 1fr); }
.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cols-learn { grid-template-columns: minmax(250px, 320px) minmax(0, 1.25fr) minmax(0, 1fr); }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); padding: 14px; box-shadow: var(--shadow); min-width: 0; }
.card.flat { box-shadow: none; background: var(--panel2); }
.stack { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.row.end { justify-content: flex-end; }
.spacer { flex: 1; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 10px; }
.form .full { grid-column: 1 / -1; }
.form label { display: flex; flex-direction: column; gap: 2px; }
.seg { display: inline-flex; background: var(--lav-l); border-radius: 11px; padding: 3px; gap: 2px; }
.seg button { border: 0; background: transparent; border-radius: 8px; padding: 5px 12px; color: var(--lav-d); }
.seg button.on { background: #fff; box-shadow: var(--shadow); font-weight: 600; }

.view3d { position: relative; height: 520px; border-radius: var(--r); overflow: hidden; background: linear-gradient(180deg, #f3efff 0%, #fbf9ff 60%, #f3faf6 100%); border: 1px solid var(--line); }
.view3d canvas { display: block; }
.view3d .overlay { position: absolute; left: 10px; top: 10px; display: flex; gap: 6px; flex-wrap: wrap; }
.view3d .legend { position: absolute; left: 10px; bottom: 10px; background: rgba(255,255,255,.85); border-radius: 10px; padding: 6px 10px; font-size: 12px; display: flex; gap: 10px; flex-wrap: wrap; }
.view3d .readout { position: absolute; right: 10px; top: 10px; background: rgba(255,255,255,.9); border-radius: 10px; padding: 6px 10px; font-size: 12px; font-variant-numeric: tabular-nums; }
.swatch { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 4px; vertical-align: -1px; }
.chart { width: 100%; height: 340px; }
.chart.tall { height: 520px; }
.chart.short { height: 260px; }

.badge { display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: 999px; font-weight: 600; font-size: 13px; white-space: nowrap; }
.g-good { background: var(--mint); color: var(--mint-d); }
.g-minor { background: var(--sky); color: var(--sky-d); }
.g-flaw { background: var(--butter); color: var(--butter-d); }
.g-defect { background: var(--rose); color: var(--rose-d); }
.g-inconclusive, .g-unknown { background: var(--lav-l); color: var(--lav-d); }
.result-head { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 8px; }
.result-head .big { font-size: 22px; padding: 6px 16px; }

table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { padding: 6px 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12px; background: var(--panel2); position: sticky; top: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.table-wrap { overflow: auto; max-height: 460px; border: 1px solid var(--line); border-radius: 10px; }
tr.sel td { background: var(--lav-l); }

.trace { list-style: none; padding: 0; margin: 0; counter-reset: step; }
.trace li { position: relative; padding: 8px 10px 8px 38px; border-bottom: 1px dashed var(--line); }
.trace li::before { counter-increment: step; content: counter(step); position: absolute; left: 6px; top: 8px; width: 22px; height: 22px; border-radius: 50%; background: var(--lav-l); color: var(--lav-d); font-size: 12px; display: grid; place-items: center; font-weight: 600; }
.trace li.cls::before { background: var(--lav-d); color: #fff; content: '✓'; }
.trace .tags { display: flex; gap: 6px; margin-top: 3px; flex-wrap: wrap; }
.tag { font-size: 11px; padding: 1px 8px; border-radius: 999px; background: var(--sky-l); color: var(--sky-d); cursor: help; border: 1px solid transparent; }
.tag.assume { background: var(--butter-l); color: var(--butter-d); }
.warns { list-style: none; padding: 0; margin: 8px 0 0; }
.warns li { padding: 6px 10px; border-radius: 10px; background: var(--peach-l); color: var(--peach-d); margin-bottom: 6px; font-size: 13px; }
.gloss td { font-size: 13px; }
.gloss td:first-child { white-space: nowrap; color: var(--lav-d); }
.refs dt { font-weight: 600; color: var(--lav-d); margin-top: 6px; }
.refs dd { margin: 0 0 4px; font-size: 12px; color: var(--muted); }
details > summary { cursor: pointer; color: var(--lav-d); font-weight: 600; }

.lessons { display: flex; flex-direction: column; gap: 6px; }
.lessons button { text-align: left; border-radius: 10px; border: 1px solid var(--line); background: #fff; }
.lessons button.on { background: var(--lav-l); border-color: var(--lav); color: var(--lav-d); font-weight: 600; }
.lesson-body { font-size: 14px; }
.lesson-body ul { padding-left: 18px; margin: 4px 0 8px; }
.slider { display: grid; grid-template-columns: 1fr auto; gap: 2px 8px; align-items: center; }
.slider input { grid-column: 1 / -1; width: 100%; }
.slider output { font-variant-numeric: tabular-nums; font-size: 12px; color: var(--lav-d); }
.quiz { background: var(--mint-l); border-radius: var(--r); padding: 12px; }
.quiz.wrong { background: var(--peach-l); }

.drop { border: 2px dashed var(--lav); border-radius: var(--r); padding: 28px; text-align: center; background: var(--lav-l); color: var(--lav-d); cursor: pointer; }
.drop.over { background: #e4dcff; }
.file-card { border: 1px solid var(--line); border-radius: var(--r); background: #fff; padding: 12px; }
.file-card .fname { font-weight: 600; }
.dig-wrap { position: relative; overflow: auto; max-height: 520px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.dig-wrap canvas { display: block; cursor: crosshair; }
.pdf-text { white-space: pre-wrap; font-family: ui-monospace, Consolas, monospace; font-size: 12px; max-height: 260px; overflow: auto; background: var(--panel2); border-radius: 10px; padding: 8px; }
.progress { height: 6px; background: var(--lav-l); border-radius: 99px; overflow: hidden; }
.progress > div { height: 100%; background: var(--lav-d); width: 0; transition: width .2s; }

#toast { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); background: var(--ink); color: #fff; padding: 8px 16px; border-radius: 999px; font-size: 13px; opacity: 0; pointer-events: none; transition: opacity .2s; z-index: 50; }
#toast.show { opacity: .92; }

/* report */
.report { background: #fff; color: #222; }
.page { width: 210mm; min-height: 297mm; padding: 14mm 14mm 16mm; margin: 0 auto 16px; background: #fff; box-shadow: var(--shadow); position: relative; }
.page h2 { color: #3f3290; }
.page table { font-size: 11px; }
.page th { position: static; }
.rp-head { display: flex; justify-content: space-between; align-items: flex-end; border-bottom: 2px solid var(--lav-d); padding-bottom: 6px; margin-bottom: 10px; }
.rp-head .t { font-size: 17px; font-weight: 700; color: #3f3290; }
.rp-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2px 10px; font-size: 11px; margin-bottom: 8px; }
.rp-grid b { color: #555; font-weight: 600; }
.rp-img { width: 100%; border: 1px solid #eee; border-radius: 6px; }
.rp-trace { font-size: 10.5px; margin: 0; padding-left: 18px; }
.rp-trace li { margin-bottom: 2px; }
.sign { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 18px; font-size: 11px; text-align: center; }
.sign div { border-top: 1px solid #999; padding-top: 4px; margin-top: 34px; }
.disclaimer { font-size: 10px; color: #666; border-top: 1px solid #ddd; margin-top: 10px; padding-top: 6px; }

@media (max-width: 1250px) { .cols-learn { grid-template-columns: minmax(240px, 300px) minmax(0, 1fr); } .cols-learn > :last-child { grid-column: 1 / -1; } }
@media (max-width: 900px) {
  .cols-side, .cols-2, .cols-learn { grid-template-columns: minmax(0, 1fr); }
  .view3d { height: 380px; }
  .form { grid-template-columns: minmax(0, 1fr); }
  .rp-grid { grid-template-columns: repeat(2, 1fr); }
  main { padding: 12px 16px; }
}
@media print {
  body { background: #fff; }
  .no-print, .topbar, .tabs { display: none !important; }
  main { padding: 0; max-width: none; }
  .tab { display: none !important; }
  #tab-report { display: block !important; }
  .page { box-shadow: none; margin: 0; page-break-after: always; width: auto; min-height: auto; padding: 0; }
  @page { size: A4; margin: 12mm; }
}