/* ArthaCalc WordPress theme — main stylesheet
   Palette/typography ported from the original design tokens. */

:root {
  --font-sans: "Figtree", ui-sans-serif, system-ui, sans-serif;
  --font-display: "Newsreader", "Iowan Old Style", Georgia, serif;

  --color-bg: #f3f0e8;
  --color-bg-elevated: #fcfaf5;
  --color-surface: #fffdf8;
  --color-ink: #161513;
  --color-muted: #6a655c;
  --color-subtle: #8a8478;
  --color-pine: #1e4d43;
  --color-pine-fg: #f4f2ed;
  --color-pine-soft: #e4ede8;
  --color-pine-deep: #14352e;
  --color-border: #e4dfd4;
  --color-danger: #8f2d2d;
  --color-warn: #8a5a12;

  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;

  --shadow-border: 0px 0px 0px 1px rgba(22,21,19,0.06), 0px 1px 2px -1px rgba(22,21,19,0.06), 0px 2px 4px 0px rgba(22,21,19,0.04);
  --shadow-lift: 0px 0px 0px 1px rgba(22,21,19,0.08), 0px 8px 24px -8px rgba(22,21,19,0.16);
}

* { box-sizing: border-box; }
html { -webkit-font-smoothing: antialiased; background: var(--color-bg); color: var(--color-ink); }
body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-ink);
  min-height: 100dvh;
  margin: 0;
  display: flex;
  flex-direction: column;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 500; letter-spacing: -0.01em; margin: 0; }
p { margin: 0; line-height: 1.6; }
button, [role="button"] { cursor: pointer; font-family: inherit; }
::selection { background: var(--color-pine); color: var(--color-pine-fg); }

.wrap { max-width: 72rem; margin: 0 auto; padding: 0 1.25rem; }
.muted { color: var(--color-muted); }
.subtle { color: var(--color-subtle); }
.kicker { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase; color: var(--color-pine); }

/* ---------- Header ---------- */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(252,250,245,0.95); backdrop-filter: blur(8px); border-bottom: 1px solid var(--color-border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; height: 4rem; }
.logo { display: flex; align-items: center; gap: 0.5rem; font-family: var(--font-display); font-weight: 600; font-size: 1.25rem; color: var(--color-ink); }
.logo .dot { color: var(--color-pine); }

.main-nav { display: none; align-items: center; gap: 0.25rem; }
@media (min-width: 1024px) { .main-nav { display: flex; } .mobile-toggle { display: none !important; } }
.main-nav > .nav-item { position: relative; }
.main-nav > .nav-item > a, .main-nav > .nav-item > button {
  display: flex; align-items: center; gap: 0.25rem; height: 4rem; padding: 0 0.85rem;
  font-size: 0.85rem; font-weight: 500; background: none; border: none; color: var(--color-ink);
}
.main-nav > .nav-item.active > a, .main-nav > .nav-item.active > button { color: var(--color-pine); }
.nav-dropdown {
  position: absolute; top: 100%; left: 0; min-width: 15rem; background: var(--color-surface);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-lift); padding: 0.5rem; display: none; margin-top: 0.25rem;
}
.nav-item:hover .nav-dropdown, .nav-item.open .nav-dropdown { display: block; }
.nav-dropdown a { display: block; padding: 0.6rem 0.75rem; border-radius: var(--radius-sm); }
.nav-dropdown a:hover { background: var(--color-pine-soft); }
.nav-dropdown .child-label { font-weight: 500; font-size: 0.9rem; }
.nav-dropdown .child-desc { font-size: 0.78rem; color: var(--color-muted); display: block; margin-top: 0.1rem; }

.mobile-toggle { background: none; border: none; padding: 0.5rem; }
.mobile-menu { display: none; position: fixed; inset: 4rem 0 0 0; background: var(--color-bg-elevated); z-index: 49; overflow-y: auto; padding: 1rem 1.25rem 2rem; }
.mobile-menu.open { display: block; }
.mobile-menu details { border-bottom: 1px solid var(--color-border); padding: 0.75rem 0; }
.mobile-menu summary { font-weight: 600; cursor: pointer; }
.mobile-menu .mm-link { display: block; padding: 0.6rem 0; font-weight: 500; border-bottom: 1px solid var(--color-border); }
.mobile-menu .mm-child { display: block; padding: 0.4rem 0 0.4rem 0.75rem; font-size: 0.9rem; color: var(--color-muted); }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 0.5rem; height: 3rem; padding: 0 1.25rem; border-radius: var(--radius-md); font-size: 0.9rem; font-weight: 500; border: none; }
.btn-primary { background: var(--color-pine); color: var(--color-pine-fg); }
.btn-primary:hover { background: var(--color-pine-deep); }
.btn-secondary { background: transparent; color: var(--color-ink); box-shadow: var(--shadow-border); }
.btn-secondary:hover { background: var(--color-surface); }

/* ---------- Sections / cards ---------- */
.section { padding: 3rem 0; }
.section-elevated { background: var(--color-bg-elevated); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.hero { background: var(--color-bg-elevated); border-bottom: 1px solid var(--color-border); padding: 3.5rem 0 5rem; }
.hero h1 { font-size: 2.4rem; line-height: 1.1; max-width: 40rem; margin-top: 1rem; }
@media (min-width: 640px) { .hero h1 { font-size: 3.6rem; } }
.hero p.lead { max-width: 34rem; margin-top: 1.1rem; font-size: 1.05rem; color: var(--color-muted); }
.hero .cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }

.card { background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-border); padding: 1.25rem; transition: box-shadow .15s; }
.card:hover { box-shadow: var(--shadow-lift); }
.card h3 { font-size: 1.15rem; }
.card p { margin-top: 0.4rem; font-size: 0.9rem; color: var(--color-muted); }

.grid-4 { display: grid; gap: 0.85rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .grid-4 { grid-template-columns: repeat(2,1fr); } }
@media (min-width: 1024px) { .grid-4 { grid-template-columns: repeat(4,1fr); } }
.grid-2 { display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
@media (min-width: 768px) { .grid-2 { grid-template-columns: repeat(2,1fr); } }

.cat-list { margin-top: 1rem; background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-border); overflow: hidden; }
.cat-list li { border-bottom: 1px solid var(--color-border); }
.cat-list li:last-child { border-bottom: none; }
.cat-list a { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; padding: 0.85rem 1rem; min-height: 3rem; }
.cat-list a:hover { background: rgba(228,237,232,0.5); }
.cat-list .desc { font-size: 0.78rem; color: var(--color-muted); display: none; }
@media (min-width: 640px) { .cat-list .desc { display: inline; } }

.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.section-head h2 { font-size: 1.6rem; }
.link-more { font-size: 0.9rem; font-weight: 500; color: var(--color-pine); }
.link-more:hover { text-decoration: underline; }

.blog-card .meta { font-size: 0.75rem; color: var(--color-subtle); }
.blog-card h3 { margin-top: 0.5rem; font-size: 1.2rem; line-height: 1.35; }
.blog-card p { margin-top: 0.5rem; }

/* ---------- Calculator page ---------- */
.calc-hero { background: var(--color-bg-elevated); border-bottom: 1px solid var(--color-border); padding: 2.5rem 0; }
.calc-hero h1 { font-size: 2rem; margin-top: 0.5rem; }
@media (min-width: 640px) { .calc-hero h1 { font-size: 2.6rem; } }
.calc-hero .sub { margin-top: 0.75rem; max-width: 42rem; color: var(--color-muted); }

.ac-calculator { margin-top: 2rem; }
.ac-grid { display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
@media (min-width: 900px) { .ac-grid { grid-template-columns: minmax(0,1fr) minmax(0,1fr); align-items: start; } }
.ac-col-form, .ac-col-result { background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-border); padding: 1.5rem; }

.ac-field { margin-bottom: 1.35rem; }
.ac-field-label-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.4rem; }
.ac-field-label { font-size: 0.85rem; font-weight: 500; }
.ac-field-value { font-size: 0.85rem; font-weight: 600; color: var(--color-pine); font-variant-numeric: tabular-nums; }
.ac-field-help { margin-top: 0.35rem; font-size: 0.76rem; color: var(--color-subtle); }
.ac-range { width: 100%; accent-color: var(--color-pine); height: 1.4rem; }
.ac-number { width: 100%; margin-top: 0.5rem; padding: 0.5rem 0.65rem; border-radius: var(--radius-sm); border: 1px solid var(--color-border); background: var(--color-bg-elevated); font-family: inherit; }
.ac-select { width: 100%; padding: 0.6rem 0.65rem; border-radius: var(--radius-sm); border: 1px solid var(--color-border); background: var(--color-bg-elevated); font-family: inherit; font-size: 0.9rem; }

.ac-metrics { display: grid; grid-template-columns: repeat(2,1fr); gap: 0.85rem; }
.ac-metric { display: flex; flex-direction: column; gap: 0.25rem; padding: 0.85rem; border-radius: var(--radius-md); background: var(--color-bg-elevated); }
.ac-metric-main { grid-column: 1 / -1; background: var(--color-pine-soft); }
.ac-metric-label { font-size: 0.75rem; color: var(--color-muted); }
.ac-metric-value { font-family: var(--font-display); font-size: 1.4rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.ac-metric-main .ac-metric-value { color: var(--color-pine-deep); font-size: 1.9rem; }

.ac-donut-wrap { margin-top: 1.25rem; }
.ac-donut-bar { display: flex; width: 100%; height: 0.85rem; border-radius: 999px; overflow: hidden; background: var(--color-border); }
.ac-donut-seg { display: inline-block; height: 100%; }
.ac-donut-legend { display: flex; flex-wrap: wrap; gap: 0.75rem 1.25rem; margin-top: 0.75rem; }
.ac-legend-item { display: flex; align-items: center; gap: 0.4rem; font-size: 0.78rem; color: var(--color-muted); }
.ac-legend-item i { width: 0.6rem; height: 0.6rem; border-radius: 999px; display: inline-block; }

.ac-notes { margin: 1.25rem 0 0; padding-left: 1.1rem; }
.ac-notes li { font-size: 0.8rem; color: var(--color-muted); margin-bottom: 0.4rem; line-height: 1.55; }

.ac-table-wrap { margin-top: 1.25rem; max-height: 22rem; overflow: auto; border-radius: var(--radius-md); border: 1px solid var(--color-border); }
.ac-table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
.ac-table th, .ac-table td { padding: 0.5rem 0.75rem; text-align: left; border-bottom: 1px solid var(--color-border); white-space: nowrap; }
.ac-table thead th { position: sticky; top: 0; background: var(--color-bg-elevated); font-weight: 600; }
.ac-error { color: var(--color-danger); font-size: 0.9rem; }

.calc-formula, .calc-about { margin-top: 2rem; padding: 1.25rem 1.5rem; background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-border); }
.calc-formula h2, .calc-about h2 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.calc-formula code { display: block; font-family: var(--font-sans); font-size: 0.9rem; background: var(--color-bg-elevated); padding: 0.75rem 1rem; border-radius: var(--radius-sm); }
.calc-about p { color: var(--color-muted); font-size: 0.92rem; }

/* ---------- Article / static pages ---------- */
.article, .static-page { padding: 3rem 0; max-width: 42rem; margin: 0 auto; }
.article h1, .static-page h1 { font-size: 2.1rem; }
.article .dek, .static-page .dek { margin-top: 0.75rem; color: var(--color-muted); font-size: 1.05rem; }
.article .meta { margin-top: 0.75rem; font-size: 0.8rem; color: var(--color-subtle); }
.article .content, .static-page .content { margin-top: 2rem; }
.article .content p, .static-page .content p { margin-bottom: 1.1rem; line-height: 1.75; color: var(--color-ink); }
.static-page .content h2 { margin-top: 2rem; margin-bottom: 0.6rem; font-size: 1.25rem; }
.static-page .content ul { padding-left: 1.2rem; margin-bottom: 1.1rem; }

.blog-list { padding: 3rem 0; }

/* ---------- Footer ---------- */
.site-footer { margin-top: auto; border-top: 1px solid var(--color-border); background: var(--color-bg-elevated); }
.footer-grid { display: grid; gap: 2.25rem; padding: 2.75rem 0; grid-template-columns: 1fr; }
@media (min-width: 640px) { .footer-grid { grid-template-columns: repeat(2,1fr); } }
@media (min-width: 900px) { .footer-grid { grid-template-columns: 1.4fr repeat(4,1fr); } }
.footer-grid .f-desc { margin-top: 0.75rem; max-width: 18rem; font-size: 0.88rem; color: var(--color-muted); }
.footer-grid .f-title { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.16em; color: var(--color-subtle); text-transform: uppercase; }
.footer-grid ul { list-style: none; margin: 0.6rem 0 0; padding: 0; }
.footer-grid li { margin-bottom: 0.35rem; }
.footer-grid a { font-size: 0.86rem; color: var(--color-muted); }
.footer-grid a:hover { color: var(--color-ink); }
.footer-bottom { border-top: 1px solid var(--color-border); padding: 1.1rem 0; display: flex; flex-direction: column; gap: 0.4rem; font-size: 0.75rem; color: var(--color-subtle); }
@media (min-width: 640px) { .footer-bottom { flex-direction: row; align-items: center; justify-content: space-between; } }

/* Skip link */
.skip-link { position: absolute; left: -999px; top: auto; background: var(--color-pine); color: var(--color-pine-fg); padding: 0.6rem 1rem; border-radius: var(--radius-sm); z-index: 100; }
.skip-link:focus { left: 1rem; top: 0.75rem; }