/* ============================================================
   Measure Past — shared site skin
   One consistent design system for every tradition on the site.
   ============================================================ */

:root {
  --paper: #f9f7f2;
  --paper-raised: #ffffff;
  --paper-sunken: #f0ede4;
  --ink: #22262b;
  --ink-soft: #565f68;
  --ink-faint: #8b9198;
  --rule: #dcd6c8;
  --rule-soft: #e9e4d7;
  --brass: #9c7a2e;
  --brass-soft: #f3e9cc;
  --brass-strong: #7a5e1f;
  --accent: #2d5c56;
  --accent-soft: #e2ede9;
  --link: #1f5c8b;
  --focus: #1f6fb2;
  --danger: #a13a2e;
  --shadow: 0 1px 2px rgba(30, 26, 14, 0.06), 0 6px 20px -8px rgba(30, 26, 14, 0.18);
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #181a1c;
    --paper-raised: #212426;
    --paper-sunken: #141617;
    --ink: #e9e6df;
    --ink-soft: #adaa9f;
    --ink-faint: #7b7870;
    --rule: #34322c;
    --rule-soft: #29271f;
    --brass: #d1ab52;
    --brass-soft: #332a15;
    --brass-strong: #e6c168;
    --accent: #6fab9e;
    --accent-soft: #1c2b28;
    --link: #6fb2e8;
    --focus: #6fb2e8;
    --danger: #e2725e;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 6px 24px -8px rgba(0, 0, 0, 0.5);
  }
}

:root[data-theme="dark"] {
  --paper: #181a1c;
  --paper-raised: #212426;
  --paper-sunken: #141617;
  --ink: #e9e6df;
  --ink-soft: #adaa9f;
  --ink-faint: #7b7870;
  --rule: #34322c;
  --rule-soft: #29271f;
  --brass: #d1ab52;
  --brass-soft: #332a15;
  --brass-strong: #e6c168;
  --accent: #6fab9e;
  --accent-soft: #1c2b28;
  --link: #6fb2e8;
  --focus: #6fb2e8;
  --danger: #e2725e;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 6px 24px -8px rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Source Sans 3", ui-sans-serif, system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); }
a:focus-visible, button:focus-visible, select:focus-visible, input:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

h1, h2, h3, h4 {
  font-family: "Fraunces", ui-serif, Georgia, serif;
  font-weight: 600;
  color: var(--ink);
  margin: 0;
  text-wrap: balance;
}

.title-native {
  font-family: "Padauk", "Myanmar Text", "Noto Sans Myanmar", "Noto Sans Thai", "Noto Sans SC", "Noto Sans Devanagari", "Noto Sans JP", "Noto Sans Arabic", "Noto Sans KR", "Noto Sans Khmer", "Noto Sans", sans-serif;
  font-weight: 400;
  color: var(--ink-faint);
  font-size: 0.62em;
}

.mono, .num, code, .unit-select, .qc-table td, .qc-table th {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;
}

.num { font-variant-numeric: tabular-nums; }

/* ---------- layout shell ---------- */

.shell { max-width: 920px; margin: 0 auto; padding: 0 1.5rem; }

header.site-head {
  border-bottom: 1px solid var(--rule);
  background: var(--paper-raised);
}

.site-head-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.5rem;
  max-width: 920px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  text-decoration: none;
}
.brand .brand-mark {
  width: 26px;
  height: 26px;
  flex: none;
  align-self: center;
}
.brand .mark {
  font-family: "Fraunces", serif;
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--ink);
}
.brand .tagline {
  font-size: 0.78rem;
  color: var(--ink-faint);
  display: none;
}
@media (min-width: 640px) {
  .brand .tagline { display: inline; }
}

.site-nav { display: flex; gap: 1.1rem; font-size: 0.9rem; }
.site-nav a { color: var(--ink-soft); text-decoration: none; }
.site-nav a:hover { color: var(--link); }

.breadcrumb {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.74rem;
  letter-spacing: 0.02em;
  color: var(--ink-faint);
  margin: 1.6rem 0 0.6rem;
}
.breadcrumb a { color: var(--ink-faint); text-decoration: none; }
.breadcrumb a:hover { color: var(--link); }
.breadcrumb .sep { margin: 0 0.4rem; opacity: 0.6; }

main { padding-bottom: 5rem; }

.page-head { margin-bottom: 2.1rem; }
.page-head h1 {
  font-size: clamp(1.9rem, 4.4vw, 2.5rem);
  line-height: 1.1;
  margin-bottom: 0.7rem;
}
.page-head .lede {
  color: var(--ink-soft);
  max-width: 66ch;
  font-size: 1.04rem;
}

.eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--brass);
  margin: 0 0 0.7rem;
}

/* ---------- calculator ---------- */

.calc {
  background: var(--paper-raised);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.6rem;
  margin-bottom: 2.6rem;
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0.9rem;
  align-items: end;
}
@media (max-width: 620px) {
  .calc-grid { grid-template-columns: 1fr; }
  .calc-swap { justify-self: center; }
}

.calc-field label {
  display: block;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 0.4rem;
}

.calc-field input[type="text"],
.calc-field input[type="number"] {
  width: 100%;
  font-family: "JetBrains Mono", monospace;
  font-size: 1.15rem;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
}
.calc-field input:focus { border-color: var(--focus); }

.calc-field select {
  width: 100%;
  font-family: "Source Sans 3", sans-serif;
  font-size: 0.95rem;
  padding: 0.62rem 0.7rem;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  margin-top: 0.5rem;
}

.calc-swap {
  border: 1px solid var(--rule);
  background: var(--paper-sunken);
  color: var(--ink-soft);
  border-radius: 8px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.05rem;
  margin-bottom: 0.15rem;
  transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
}
.calc-swap:hover { background: var(--brass-soft); color: var(--brass-strong); transform: rotate(180deg); }

.calc-result {
  margin-top: 1.2rem;
  padding-top: 1.1rem;
  border-top: 1px dashed var(--rule);
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 1.02rem;
  color: var(--ink-soft);
}
.calc-result .answer {
  font-family: "JetBrains Mono", monospace;
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--accent);
}
.calc-result .factor {
  font-size: 0.82rem;
  color: var(--ink-faint);
  width: 100%;
}

/* ---------- quick conversion table ---------- */

.section { margin-top: 3rem; }
.section h2 { font-size: 1.4rem; margin-bottom: 0.5rem; }
.section .section-note { color: var(--ink-soft); max-width: 66ch; margin: 0.4rem 0 1.2rem; font-size: 0.97rem; }
.section .section-note strong { color: var(--ink); font-weight: 600; }

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper-raised);
}
table.qc-table { border-collapse: collapse; width: 100%; min-width: 480px; font-size: 0.92rem; }
.qc-table thead th {
  text-align: left;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 500;
  padding: 0.65rem 0.9rem;
  border-bottom: 1px solid var(--rule);
  white-space: nowrap;
}
.qc-table tbody td {
  padding: 0.55rem 0.9rem;
  border-bottom: 1px solid var(--rule-soft);
  white-space: nowrap;
}
.qc-table tbody tr:last-child td { border-bottom: none; }

/* ---------- definitions ---------- */

.def-grid { display: grid; gap: 0.85rem; margin-top: 1.1rem; }
.def-card {
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper-raised);
  padding: 1rem 1.15rem;
  display: grid;
  grid-template-columns: minmax(140px, 200px) 1fr;
  gap: 0.4rem 1.1rem;
  align-items: start;
}
@media (max-width: 600px) {
  .def-card { grid-template-columns: 1fr; }
}
.def-name { font-weight: 600; color: var(--ink); }
.def-name .script { font-weight: 400; color: var(--ink-faint); margin-left: 0.4em; font-size: 0.9em; }
.def-value {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.86rem;
  color: var(--brass-strong);
}
.def-text { color: var(--ink-soft); font-size: 0.93rem; grid-column: 1 / -1; }

/* ---------- formula box ---------- */

.formula-box {
  border-left: 3px solid var(--brass);
  background: var(--paper-sunken);
  border-radius: 0 8px 8px 0;
  padding: 0.9rem 1.15rem;
  margin-top: 1rem;
}
.formula-box .flabel {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--brass);
  margin-bottom: 0.5rem;
}
.formula-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 0.32rem; }
.formula-list code { font-size: 0.87rem; }

/* ---------- Burmese-language blocks ---------- */

.mm-block {
  margin-top: 0.5rem;
  padding-inline-start: 0.75rem;
  border-inline-start: 2px solid var(--rule);
}
.mm-tag {
  display: inline-block;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brass);
  margin-bottom: 0.25rem;
}
.mm-text {
  display: block;
  font-family: "Padauk", "Myanmar Text", "Noto Sans Myanmar", "Noto Sans Thai", "Noto Sans SC", "Noto Sans Devanagari", "Noto Sans JP", "Noto Sans Arabic", "Noto Sans KR", "Noto Sans Khmer", "Noto Sans", sans-serif;
  color: var(--ink-soft);
  font-size: 0.97rem;
  line-height: 1.6;
}
.mm-text p { margin: 0 0 0.55rem; }
.mm-text p:last-child { margin-bottom: 0; }
.mm-title {
  font-family: "Padauk", "Myanmar Text", "Noto Sans Myanmar", "Noto Sans Thai", "Noto Sans SC", "Noto Sans Devanagari", "Noto Sans JP", "Noto Sans Arabic", "Noto Sans KR", "Noto Sans Khmer", "Noto Sans", sans-serif;
  font-size: 1.02rem;
  margin: 0 0 0.4rem;
  color: var(--ink);
}
.def-text .mm-block { margin-top: 0.4rem; }
.callout .mm-callout { margin-top: 0.9rem; border-color: var(--rule-soft); }

/* ---------- callout ---------- */

.callout {
  margin-top: 1.4rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  background: linear-gradient(180deg, var(--brass-soft), var(--paper-raised));
}
.callout h3 { font-size: 1.05rem; margin-bottom: 0.5rem; }
.callout p { margin: 0 0 0.55rem; color: var(--ink-soft); font-size: 0.95rem; }
.callout p:last-child { margin-bottom: 0; }

/* ---------- system/category cards (home & hub pages) ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 1.6rem;
}
.card {
  display: block;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper-raised);
  padding: 1.25rem 1.3rem;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.card:hover { transform: translateY(-2px); border-color: var(--brass); }
.card .card-eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.card h3 { font-size: 1.12rem; margin-bottom: 0.4rem; }
.card p { margin: 0; color: var(--ink-soft); font-size: 0.9rem; }

.card.disabled { opacity: 0.55; cursor: default; }
.card.disabled:hover { transform: none; border-color: var(--rule); }
.card .mm-block { margin-top: 0.6rem; }
.card .mm-text { font-size: 0.85rem; }

/* ---------- footer ---------- */

footer.site-foot {
  border-top: 1px solid var(--rule);
  margin-top: 4rem;
  padding: 1.6rem 0 3rem;
  font-size: 0.85rem;
  color: var(--ink-faint);
}
footer.site-foot a { color: var(--ink-faint); }
footer.site-foot a:hover { color: var(--link); }
footer.site-foot .foot-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  justify-content: space-between;
  align-items: baseline;
}
footer.site-foot .disclaimer {
  margin: 0 0 1.2rem;
  padding: 0.85rem 1.1rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper-sunken);
  color: var(--ink-soft);
  font-size: 0.84rem;
  line-height: 1.55;
}
footer.site-foot .disclaimer strong {
  display: block;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--brass);
  margin-bottom: 0.3rem;
}
footer.site-foot .disclaimer a { color: var(--brass-strong); }