:root {
  --bg: #f7f1e6;
  --paper: #fffcf6;
  --ink: #2b1d17;
  --muted: #6f5d52;
  --line: #e4d6c1;
  --maroon: #7a1f2b;
  --maroon-ink: #fff6e8;
  --gold: #b8862b;
  --gold-soft: #f3e3bd;
  --good: #23704a;
  --good-soft: #dcefe3;
  --bad: #a2312b;
  --bad-soft: #f6dcd8;
  --neutral-soft: #ece6dc;
  --shadow: 0 1px 2px rgba(60, 30, 10, .06), 0 6px 24px rgba(60, 30, 10, .06);
  --radius: 14px;
  --si: 'Noto Sans Sinhala', system-ui, sans-serif;
  --si-serif: 'Noto Serif Sinhala', 'Noto Sans Sinhala', serif;
  --en-serif: 'Source Serif 4', Georgia, serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1b1412; --paper: #241b18; --ink: #f2e7da; --muted: #bba99a; --line: #3d2f29;
    --maroon: #c25563; --maroon-ink: #1b1412; --gold: #e0b45c; --gold-soft: #3a2e1a;
    --good: #6fd09c; --good-soft: #1f3a2b; --bad: #f08a80; --bad-soft: #42221f; --neutral-soft: #33291f;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #1b1412; --paper: #241b18; --ink: #f2e7da; --muted: #bba99a; --line: #3d2f29;
  --maroon: #c25563; --maroon-ink: #1b1412; --gold: #e0b45c; --gold-soft: #3a2e1a;
  --good: #6fd09c; --good-soft: #1f3a2b; --bad: #f08a80; --bad-soft: #42221f; --neutral-soft: #33291f;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.55 var(--si);
}
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
a { color: var(--maroon); }

/* ------------------------------------------------------------- masthead */
.masthead { background: var(--maroon); color: var(--maroon-ink); }
:root[data-theme="dark"] .masthead { color: #fff; }
.masthead-inner { padding-top: 22px; }
.brand { display: flex; gap: 14px; align-items: center; }
.brand-mark {
  flex: none; width: 52px; height: 52px; border-radius: 50%;
  display: grid; place-items: center; background: var(--gold-soft); color: var(--maroon);
  font: 700 30px/1 var(--si-serif); border: 2px solid var(--gold);
}
h1 { margin: 0; font: 700 clamp(24px, 4vw, 32px)/1.15 var(--si-serif); }
.brand-en { font: 400 .62em var(--en-serif); letter-spacing: .04em; opacity: .85; margin-left: 6px; }
.tagline { margin: 2px 0 0; opacity: .85; font-size: 14px; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .masthead { color: #fff; background: #5a1620; } }

.tabs { display: flex; gap: 4px; margin-top: 18px; overflow-x: auto; scrollbar-width: none; }
.tabs button {
  border: 0; background: transparent; color: inherit; opacity: .78; cursor: pointer;
  padding: 10px 14px; font: 500 15px var(--si); border-radius: 10px 10px 0 0; white-space: nowrap;
}
.tabs button[aria-selected="true"] { background: var(--bg); color: var(--ink); opacity: 1; }
.tabs button:focus-visible { outline: 2px solid var(--gold); outline-offset: -2px; }

main { padding-top: 22px; padding-bottom: 40px; }

/* ------------------------------------------------------------- panels & forms */
.panel { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 22px; }
.field-wide { grid-column: 1 / -1; }
@media (max-width: 640px) { .form-grid { grid-template-columns: 1fr; } }
fieldset { border: 0; padding: 0; margin: 0; min-width: 0; }
legend, label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; color: var(--ink); }
.hint { font-weight: 400; color: var(--muted); font-size: 13px; }
input[type="text"], input[type="url"], input[type="password"], input[type="number"], select {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px;
  background: var(--bg); color: var(--ink); font: 16px var(--si);
}
input:focus, select:focus { outline: 2px solid var(--gold); outline-offset: 1px; }
.check { display: flex; gap: 8px; align-items: flex-start; font-weight: 400; margin-top: 8px; font-size: 14px; }
.check input { margin-top: 4px; accent-color: var(--maroon); }

.seg { display: flex; flex-wrap: wrap; gap: 6px; }
.seg label { margin: 0; font-weight: 500; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg span {
  display: inline-block; padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px;
  background: var(--bg); cursor: pointer; font-size: 15px;
}
.seg input:checked + span { background: var(--maroon); border-color: var(--maroon); color: var(--maroon-ink); }
.seg input:focus-visible + span { outline: 2px solid var(--gold); }

.prefix-row { display: flex; gap: 10px; align-items: stretch; }
.prefix-row input { flex: 1; min-width: 0; }
.prefix-preview {
  min-width: 96px; display: grid; place-items: center; padding: 0 12px; border-radius: 10px;
  background: var(--gold-soft); color: var(--ink); font: 600 22px var(--si-serif); border: 1px dashed var(--gold);
}

.advanced summary { cursor: pointer; font-weight: 600; font-size: 14px; color: var(--maroon); }
.adv-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; margin-top: 14px; }
@media (max-width: 640px) { .adv-grid { grid-template-columns: 1fr; } }
.adv-grid input[type="range"] { width: 100%; accent-color: var(--maroon); }
.adv-grid label { margin-top: 12px; }
.rules { margin-top: 14px; }
.gana-checks { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 12px; }
.gana-checks .check { margin-top: 4px; }

.actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 4px; }
button { font: 600 15px var(--si); border-radius: 10px; padding: 10px 16px; cursor: pointer; border: 1px solid var(--line); background: var(--paper); color: var(--ink); }
button.primary { background: var(--maroon); border-color: var(--maroon); color: var(--maroon-ink); }
button.primary:hover { filter: brightness(1.08); }
button.ghost { background: transparent; }
button:disabled { opacity: .55; cursor: progress; }
.status { color: var(--muted); font-size: 14px; }
.status.error { color: var(--bad); }

/* ------------------------------------------------------------- results */
.results { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; margin-top: 22px; }
@media (max-width: 400px) { .results { grid-template-columns: 1fr; } }
.results-summary { grid-column: 1 / -1; color: var(--muted); font-size: 14px; margin: 0; }
.card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 18px; display: flex; flex-direction: column; gap: 10px; position: relative; overflow: hidden;
}
.card::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; background: var(--good); }
.card.bad::before { background: var(--bad); }
.card.neutral::before { background: var(--muted); }
.card-head { display: flex; justify-content: space-between; gap: 10px; align-items: flex-start; }
.name-si { margin: 0; font: 700 34px/1.2 var(--si-serif); color: var(--ink); word-break: break-word; }
.name-en { margin: 2px 0 0; font: 400 17px var(--en-serif); color: var(--muted); letter-spacing: .02em; }
.copy { padding: 6px 10px; font-size: 13px; }

.syllables { display: flex; flex-wrap: wrap; gap: 6px; }
.syl {
  display: inline-flex; flex-direction: column; align-items: center; min-width: 44px;
  border-radius: 10px; padding: 4px 8px; border: 1px solid var(--line); background: var(--bg);
}
.syl .t { font: 600 20px/1.3 var(--si-serif); }
.syl .w { margin-top: 2px; }
.syl.first3 { border-color: var(--gold); background: var(--gold-soft); }
.w { display: inline-block; font: 700 11px/1 ui-monospace, monospace; padding: 3px 6px; border-radius: 6px; letter-spacing: .05em; }
.w-S { background: var(--neutral-soft); color: var(--ink); }
.w-L { background: var(--maroon); color: var(--maroon-ink); padding-left: 12px; padding-right: 12px; }
.syl .why { font-size: 10px; color: var(--muted); max-width: 90px; text-align: center; line-height: 1.2; margin-top: 2px; }

.gana-line { margin: 0; font-size: 15px; }
.gana-pill { display: inline-block; padding: 3px 10px; border-radius: 999px; font-weight: 600; font-size: 14px; }
.gana-pill.good { background: var(--good-soft); color: var(--good); }
.gana-pill.bad { background: var(--bad-soft); color: var(--bad); }
.gana-pill.neutral { background: var(--neutral-soft); color: var(--muted); }

.meaning { font-size: 15px; }
.meaning p { margin: 0 0 6px; }
.meaning .si { font-family: var(--si-serif); }
.meaning .ety { color: var(--muted); font-size: 14px; }
.meaning .none { color: var(--muted); font-style: italic; font-size: 14px; }
.badges { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 4px; }
.badge { font-size: 12px; padding: 3px 8px; border-radius: 6px; background: var(--neutral-soft); color: var(--muted); }
.badge.ok { background: var(--good-soft); color: var(--good); }
.badge.warn { background: var(--bad-soft); color: var(--bad); }
.badge.gold { background: var(--gold-soft); color: var(--ink); }

.skeleton { height: 220px; border-radius: var(--radius); background: linear-gradient(90deg, var(--paper), var(--neutral-soft), var(--paper)); background-size: 200% 100%; animation: shimmer 1.4s infinite; border: 1px solid var(--line); }
@keyframes shimmer { to { background-position: -200% 0; } }
@media (prefers-reduced-motion: reduce) { .skeleton { animation: none; } }

.check-form { display: grid; gap: 10px; }
#check-result { margin-top: 18px; display: grid; gap: 16px; }
#check-result .card { max-width: 560px; }

.settings { display: grid; gap: 6px; max-width: 640px; }
.settings label { margin-top: 10px; }
.note { color: var(--muted); font-size: 14px; margin: 0 0 6px; }
.model-info { margin-top: 18px; max-width: 640px; font-size: 14px; color: var(--muted); }

.prose { max-width: 760px; }
.prose h2 { font: 700 24px var(--si-serif); margin-top: 0; }
.prose h3 { font: 600 18px var(--si-serif); margin-top: 22px; }
.prose li { margin-bottom: 6px; }
.cite { font-size: 13px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 10px; margin-top: 20px; }
table.gana { width: 100%; border-collapse: collapse; font-size: 14px; margin: 8px 0; }
table.gana th, table.gana td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); }
table.gana td.ex { font: 600 17px var(--si-serif); }
.table-scroll { overflow-x: auto; }

.footer { color: var(--muted); font-size: 13px; padding-bottom: 28px; }