/* ==========================================================================
   Constropedia — shared stylesheet
   Binary and Bricks Pvt. Ltd.
   1. Tokens          6. Cards & article lists
   2. Reset & base    7. Bands (term, tools, newsletter, templates)
   3. Layout          8. Article pages
   4. Typography      9. App pages / tool pages
   5. Header/footer  10. Forms, tables, responsive
   ========================================================================== */

/* 1. TOKENS ============================================================== */

:root {
  /* Surfaces */
  --paper:        #FCFBF8;   /* page background, warm white */
  --card:         #FFFFFF;   /* cards, masthead */
  --tint:         #F4EEE4;   /* tinted band */

  /* Ink */
  --ink:          #211E1A;   /* text, dark bands, footer */
  --ink-border:   #3A362F;   /* borders inside dark bands */
  --body:         #5C574E;   /* body / secondary text */
  --muted:        #8A847A;   /* meta text */
  --on-dark:      #B9B2A6;   /* body text on dark bands */

  /* Accent */
  --accent:       #B45309;
  --accent-hover: #92400E;
  --accent-dark:  #E8A25C;   /* accent on dark backgrounds */

  /* Lines */
  --hairline:     #E9E4DB;
  --input-border: #DED7CA;
  --hairline-soft:#F0EBE2;

  /* Type */
  --serif: Newsreader, Georgia, 'Times New Roman', serif;
  --sans:  Archivo, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --mono:  'SFMono-Regular', Menlo, Consolas, 'Courier New', monospace;

  /* Metrics */
  --wrap:    1240px;
  --gutter:  40px;
  --radius:  6px;
  --radius-s: 4px;
}

/* 2. RESET & BASE ======================================================== */

*, *::before, *::after { box-sizing: border-box; }

/* `hidden` must win over layout rules such as .field-row { display: grid }. */
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 16px/1.5 var(--sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, video { max-width: 100%; }
img { height: auto; border: 0; }

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--accent); }

h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 600; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; }

hr.hairline { border: 0; border-top: 1px solid var(--hairline); margin: 0; }

button { font: inherit; color: inherit; }

::selection { background: rgba(180, 83, 9, 0.16); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--ink); color: #fff;
  padding: 12px 20px; border-radius: 0 0 var(--radius-s) 0;
  font: 600 14px/1 var(--sans);
}
.skip-link:focus { left: 0; color: #fff; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* 3. LAYOUT ============================================================== */

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.band          { background: var(--card); border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); }
.band--tint    { background: var(--tint); border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); }
.band--dark    { background: var(--ink); }
.band--paper   { background: var(--paper); }

/* Vertical padding only: these sit on the same element as .wrap, whose side
   padding is the page gutter. A `padding: Npx 0` shorthand would zero it and
   push text against the screen edge on phones. */
.section       { padding-top: 56px; padding-bottom: 56px; }
.section--tight{ padding-top: 44px; padding-bottom: 44px; }
.section--wide { padding-top: 64px; padding-bottom: 64px; }

.stack   { display: flex; flex-direction: column; }
.stack-6 { display: flex; flex-direction: column; gap: 6px; }
.stack-8 { display: flex; flex-direction: column; gap: 8px; }
.stack-12{ display: flex; flex-direction: column; gap: 12px; }
.stack-14{ display: flex; flex-direction: column; gap: 14px; }
.stack-20{ display: flex; flex-direction: column; gap: 20px; }
.stack-26{ display: flex; flex-direction: column; gap: 26px; }
.stack-28{ display: flex; flex-direction: column; gap: 28px; }

.grid    { display: grid; gap: 24px; }
.grid-2  { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3  { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; }
.grid-4  { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.section-head {
  display: flex; align-items: baseline;
  justify-content: space-between; gap: 24px;
}

/* 4. TYPOGRAPHY ========================================================== */

.serif { font-family: var(--serif); }

.kicker {
  font: 700 11px/1 var(--sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}
.kicker--ink   { color: var(--ink); }
.kicker--muted { color: var(--muted); }
.kicker--dark  { color: var(--accent-dark); }

.meta {
  font: 400 12.5px/1.4 var(--sans);
  color: var(--muted);
}

.lede {
  font: 400 17px/1.55 var(--sans);
  color: var(--body);
}

.page-title {
  font-family: var(--serif);
  font-size: 42px; line-height: 1.12; font-weight: 600;
  letter-spacing: -0.015em;
}

.h-xl { font-family: var(--serif); font-size: 32px; font-weight: 600; letter-spacing: -0.01em; line-height: 1.2; }
.h-l  { font-family: var(--serif); font-size: 30px; font-weight: 600; letter-spacing: -0.01em; line-height: 1.22; }
.h-m  { font-family: var(--serif); font-size: 26px; font-weight: 600; line-height: 1.25; }
.h-s  { font-family: var(--serif); font-size: 21px; font-weight: 600; line-height: 1.3; }

.link-more {
  font: 600 13.5px/1 var(--sans);
  color: var(--accent);
  white-space: nowrap;
}
.link-more:hover { color: var(--accent-hover); }

.breadcrumbs { font: 400 12.5px/1.4 var(--sans); color: var(--muted); }
.breadcrumbs a { color: var(--muted); }
.breadcrumbs a:hover { color: var(--accent); }
.breadcrumbs li { display: inline; list-style: none; }
.breadcrumbs li + li::before { content: ' › '; color: var(--muted); }

/* Buttons ---------------------------------------------------------------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--accent); color: #fff;
  border: 1px solid var(--accent); border-radius: var(--radius-s);
  padding: 13px 22px;
  font: 600 14px/1 var(--sans);
  cursor: pointer;
  transition: background-color .15s ease, border-color .15s ease;
}
.btn:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }

.btn-ghost {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: transparent; color: var(--ink);
  border: 1px solid var(--ink); border-radius: var(--radius-s);
  padding: 12px 22px;
  font: 600 14px/1 var(--sans);
  cursor: pointer;
  transition: background-color .15s ease, color .15s ease;
}
.btn-ghost:hover { background: var(--ink); color: #fff; }

.btn-ghost--dark { border-color: var(--ink-border); color: #fff; }
.btn-ghost--dark:hover { background: #fff; color: var(--ink); border-color: #fff; }

.btn-sm { padding: 9px 16px; font-size: 13px; }

/* 5. HEADER & FOOTER ===================================================== */

.utility {
  background: var(--ink);
}
.utility .wrap {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 34px; gap: 24px;
}
.utility__tag {
  font: 500 11.5px/1 var(--sans);
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--on-dark);
}
.utility__links { display: flex; gap: 24px; }
.utility__links a { font: 500 11.5px/1 var(--sans); color: var(--on-dark); }
.utility__links a:hover { color: #fff; }

.masthead {
  background: var(--card);
  border-bottom: 1px solid var(--hairline);
  position: sticky; top: 0; z-index: 40;
}
.masthead .wrap {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 76px; gap: 24px;
}

.brand { display: inline-flex; align-items: center; flex-shrink: 0; }
.brand img { display: block; width: 196px; height: auto; }
.brand:hover { opacity: .82; }

.nav { display: flex; align-items: center; gap: 30px; }
.nav a.navlink {
  font: 500 14px/1 var(--sans);
  color: var(--ink);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}
.nav a.navlink:hover { color: var(--accent); }
.nav a.navlink[aria-current='page'] { color: var(--accent); border-bottom-color: var(--accent); }

.search {
  display: flex; align-items: center; gap: 10px;
  border: 1px solid var(--input-border); border-radius: var(--radius-s);
  padding: 0 14px; height: 40px; width: 220px;
  background: var(--paper);
}
.search svg { flex-shrink: 0; }
.search input {
  border: 0; background: none; outline: none; width: 100%;
  font: 400 13px/1 var(--sans); color: var(--ink);
}
.search input::placeholder { color: var(--muted); }

.nav-toggle {
  display: none;
  align-items: center; justify-content: center;
  width: 42px; height: 42px;
  background: none; border: 1px solid var(--input-border);
  border-radius: var(--radius-s); cursor: pointer;
}

/* Footer ----------------------------------------------------------------- */

.site-footer { background: var(--ink); }
.site-footer__top {
  display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1fr); gap: 48px;
  padding: 56px 0 40px;
}
.site-footer__brand img { width: 220px; height: auto; display: block; }
.site-footer__blurb {
  font: 400 13.5px/1.6 var(--sans);
  color: var(--muted);
  max-width: 300px;
}
.foot-head {
  font: 700 11px/1 var(--sans);
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--body); margin-bottom: 12px;
}
.footlink { font: 400 13.5px/2.2 var(--sans); color: var(--on-dark); }
.footlink:hover { color: #fff; }

.site-footer__bottom { border-top: 1px solid var(--ink-border); }
.site-footer__bottom .wrap {
  display: flex; justify-content: space-between; align-items: center;
  gap: 24px; padding-top: 20px; padding-bottom: 20px;
}
.site-footer__bottom span,
.site-footer__bottom a { font: 400 12px/1.6 var(--sans); color: var(--body); }
.site-footer__bottom a:hover { color: #fff; }

/* 6. CARDS & ARTICLE LISTS =============================================== */

.card {
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
}

/* Blueprint-grid thumbnail placeholder */
.thumb {
  border-radius: var(--radius-s);
  background:
    repeating-linear-gradient(0deg,  rgba(180,83,9,0.07) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(90deg, rgba(180,83,9,0.07) 0 1px, transparent 1px 24px),
    var(--tint);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.thumb--hero { height: 340px; }
.thumb--lg   { height: 180px; }
.thumb--md   { height: 170px; }
.thumb--sm   { height: 150px; }
.thumb img { width: 100%; height: 100%; object-fit: cover; }

.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--input-border); border-radius: 999px;
  font: 500 13.5px/1 var(--sans);
  background: var(--card);
  white-space: nowrap;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip[aria-current='page'], .chip.is-active {
  background: var(--ink); border-color: var(--ink); color: #fff;
}

.chip-row {
  display: flex; align-items: center; gap: 10px;
  padding: 18px 0;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.chip-row::-webkit-scrollbar { display: none; }
.chip-row .chip { flex-shrink: 0; }
/* The blog filter row carries every category — let it wrap where there is room,
   and stay a single scrolling line on narrow screens. */
@media (min-width: 769px) {
  .chip-row[data-filter-row],
  .chip-row[data-wrap] { flex-wrap: wrap; overflow-x: visible; row-gap: 10px; }
}
.chip-row__label {
  font: 700 11px/1 var(--sans);
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--muted); margin-right: 6px; flex-shrink: 0;
}

/* Article card (thumb + kicker + serif title + meta) */
.acard { display: flex; flex-direction: column; gap: 12px; }
.acard__title {
  font-family: var(--serif);
  font-size: 20px; line-height: 1.3; font-weight: 500;
}
.acard--sm .acard__title { font-size: 18px; }
.acard__excerpt { font: 400 14px/1.55 var(--sans); color: var(--body); }

/* Hero */
.hero {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 48px; padding: 44px 0;
}
.hero__lead { grid-column: span 2; display: flex; flex-direction: column; gap: 20px; }
.hero__title {
  font-family: var(--serif);
  font-size: 38px; line-height: 1.15; font-weight: 600; letter-spacing: -0.01em;
}
.hero__dek {
  font: 400 16.5px/1.55 var(--sans);
  color: var(--body); max-width: 640px;
}

.rail__head {
  font: 700 11px/1 var(--sans);
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ink);
  padding-bottom: 16px;
  border-bottom: 2px solid var(--ink);
}
.rail__item {
  display: flex; flex-direction: column; gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--hairline);
}
.rail__item:last-child { border-bottom: 0; padding-bottom: 0; }
.rail__title {
  font-family: var(--serif);
  font-size: 18.5px; line-height: 1.3; font-weight: 500;
}

/* App teaser card (homepage "From our apps") */
.appcard {
  padding: 24px;
  display: flex; flex-direction: column; gap: 14px;
  height: 100%;
}
.appcard__name { font: 700 16px/1.3 var(--sans); }
.appcard__links { display: flex; flex-direction: column; gap: 10px; }
.appcard__links a {
  font: 400 13.5px/1.45 var(--sans); color: var(--body);
  border-bottom: 1px solid var(--hairline-soft);
  padding-bottom: 10px;
}
.appcard__links a:last-child { border-bottom: 0; padding-bottom: 0; }
.appcard__links a:hover { color: var(--accent); }
.appcard .link-more { margin-top: auto; }

/* 7. BANDS =============================================================== */

/* Term of the day */
.term {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 48px; padding: 40px 0; align-items: center;
}
.term__word { font-family: var(--serif); font-size: 34px; font-weight: 600; letter-spacing: -0.01em; }
.term__body { grid-column: span 2; display: flex; align-items: center; gap: 32px; }
.term__def  { font: 400 15.5px/1.6 var(--sans); color: var(--body); }
.term__body .btn-ghost { white-space: nowrap; flex-shrink: 0; }

/* Dark tools band */
.toolsband {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 48px; padding: 56px 0; align-items: center;
}
.toolsband__title { font-family: var(--serif); font-size: 32px; font-weight: 600; color: #fff; letter-spacing: -0.01em; line-height: 1.22; }
.toolsband__dek   { font: 400 15.5px/1.6 var(--sans); color: var(--on-dark); }
.toolsband__grid  { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }

.darktile {
  border: 1px solid var(--ink-border); border-radius: var(--radius);
  padding: 18px 20px;
  display: flex; flex-direction: column; gap: 4px;
}
a.darktile:hover { border-color: var(--accent-dark); }
.darktile__name { font: 600 14.5px/1.3 var(--sans); color: #fff; }
.darktile__sub  { font: 400 12.5px/1.4 var(--sans); color: var(--muted); }
.darktile__stat { font-family: var(--serif); font-size: 28px; font-weight: 600; color: #fff; }

/* Newsletter */
.newsletter { background: var(--card); border-bottom: 1px solid var(--hairline); }
.newsletter .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 48px; padding: 44px 0;
}
.newsletter__copy { display: flex; flex-direction: column; gap: 6px; max-width: 560px; }
.newsletter__title { font-family: var(--serif); font-size: 24px; font-weight: 600; }
.newsletter__sub   { font: 400 14.5px/1.5 var(--sans); color: var(--body); }
.newsletter__form  { display: flex; gap: 12px; }
.newsletter__form input[type='email'] {
  border: 1px solid var(--input-border); border-radius: var(--radius-s);
  padding: 13px 16px; width: 280px;
  font: 400 14px/1 var(--sans); color: var(--ink);
  background: var(--paper); outline: none;
}
.newsletter__form input[type='email']::placeholder { color: var(--muted); }
.newsletter__form input[type='email']:focus { border-color: var(--accent); }
.newsletter__note { font: 400 12.5px/1.5 var(--sans); color: var(--muted); }

/* Templates promo band — usable as `class="wrap promoband"` */
.promoband,
.promoband .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 48px; padding-top: 44px; padding-bottom: 44px;
}
.promoband .wrap { padding-left: 0; padding-right: 0; max-width: none; }
.promoband__left { display: flex; align-items: center; gap: 24px; }
.promoband__title { font-family: var(--serif); font-size: 26px; font-weight: 600; }
.promoband__sub   { font: 400 15px/1.5 var(--sans); color: var(--body); }

/* Offline / CTA split */
.split .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 48px; padding: 48px 0 56px;
}

/* 8. ARTICLE PAGES ======================================================= */

.article-head { padding-top: 40px; padding-bottom: 8px; }
.article-head__inner { max-width: 760px; display: flex; flex-direction: column; gap: 16px; }
.article-title {
  font-family: var(--serif);
  font-size: 44px; line-height: 1.12; font-weight: 600; letter-spacing: -0.015em;
}
.article-dek { font: 400 18px/1.55 var(--sans); color: var(--body); }

.byline {
  display: flex; align-items: center; gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  flex-wrap: wrap;
}
.byline__avatar {
  width: 40px; height: 40px; border-radius: 999px; background: var(--tint);
  display: flex; align-items: center; justify-content: center;
  font: 700 14px/1 var(--sans); color: var(--accent); flex-shrink: 0;
}
.byline__name { font: 600 13.5px/1 var(--sans); }
.byline__actions { margin-left: auto; display: flex; gap: 10px; }
.byline__actions button {
  border: 1px solid var(--input-border); background: none;
  border-radius: var(--radius-s); padding: 8px 14px;
  font: 600 12.5px/1 var(--sans); color: var(--body); cursor: pointer;
}
.byline__actions button:hover { border-color: var(--accent); color: var(--accent); }

.article-layout {
  display: grid; grid-template-columns: minmax(0, 760px) minmax(0, 1fr);
  gap: 64px; padding-top: 28px; padding-bottom: 56px;
}

.prose { display: flex; flex-direction: column; gap: 26px; min-width: 0; }
.prose p, .prose li {
  font: 400 18px/1.72 var(--serif);
  color: #33302A;
}
.prose h2 {
  font-family: var(--serif);
  font-size: 28px; font-weight: 600; line-height: 1.25;
  margin: 12px 0 0;
  scroll-margin-top: 100px;
}
.prose h3 {
  font-family: var(--serif);
  font-size: 21px; font-weight: 600; line-height: 1.3;
  margin: 4px 0 0;
  scroll-margin-top: 100px;
}
.prose ul, .prose ol { padding-left: 24px; display: flex; flex-direction: column; gap: 10px; }
.prose li { padding-left: 4px; }
.prose ul li::marker { color: var(--accent); }
.prose ol li::marker { color: var(--accent); font-family: var(--sans); font-size: 15px; font-weight: 700; }
.prose a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.prose a:hover { color: var(--accent-hover); }
.prose strong { font-weight: 700; color: var(--ink); }
/* Buttons inside prose must not inherit the prose link colour/underline. */
.prose .btn, .prose .btn:hover { color: #fff; text-decoration: none; }
.prose .btn-ghost { color: var(--ink); text-decoration: none; }
.prose .btn-ghost:hover { color: #fff; }
.prose blockquote {
  margin: 0; padding: 4px 0 4px 24px;
  border-left: 3px solid var(--accent);
}
.prose blockquote p { font-style: italic; color: var(--body); }
.prose figcaption, .caption,
.prose p.caption { font: 400 12.5px/1.5 var(--sans); color: var(--muted); margin-top: -14px; }

/* Imported-article blocks: figures, embeds, audio, deeper headings */
.prose figure.figure { margin: 0; display: flex; flex-direction: column; gap: 10px; align-items: flex-start; }
.prose figure.figure img { display: block; max-width: 100%; height: auto; border-radius: var(--radius); }
.prose figure.figure figcaption { margin-top: 0; }
.prose h4 {
  font-family: var(--serif);
  font-size: 18px; font-weight: 600; line-height: 1.35;
  margin: 0;
  scroll-margin-top: 100px;
}
.prose hr { width: 100%; border: 0; border-top: 1px solid var(--hairline); margin: 6px 0; }
.prose .embed { position: relative; width: 100%; aspect-ratio: 16 / 9; border-radius: var(--radius); overflow: hidden; background: var(--ink); }
.prose .embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.prose audio { width: 100%; }
.prose p .btn { display: inline-flex; }

/* Key takeaways */
.takeaways {
  background: var(--tint); border-radius: var(--radius);
  padding: 26px 30px;
  display: flex; flex-direction: column; gap: 12px;
}
.takeaways__head,
.prose .takeaways__head {
  font: 700 12px/1 var(--sans);
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink);
  margin: 0;
}
.takeaways p, .takeaways li,
.prose .takeaways p, .prose .takeaways li {
  font: 400 15px/1.6 var(--sans);
  color: #33302A;
}
.takeaways ul { padding-left: 20px; gap: 8px; }

/* Formula block */
.formula {
  background: var(--ink); border-radius: var(--radius);
  padding: 24px 30px;
}
.formula code, .formula__eq {
  font-family: var(--mono);
  font-size: 16.5px; line-height: 1.5; color: var(--accent-dark);
  display: block;
}
.formula__note,
.prose .formula__note { font: 400 13px/1.5 var(--sans); color: var(--muted); margin-top: 10px; }

/* In-article app promo */
.promo-card {
  display: flex; align-items: center; gap: 24px;
  padding: 22px 26px;
  border-left: 3px solid var(--accent);
}
.promo-card__icon { width: 52px; height: 52px; border-radius: 12px; flex-shrink: 0; display: block; }
.promo-card__title { font: 700 15px/1.3 var(--sans); }
.promo-card__text  { font: 400 13.5px/1.5 var(--sans); color: var(--body); }
.promo-card .btn { margin-left: auto; white-space: nowrap; }

/* Data table */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table.data { width: 100%; border-collapse: collapse; }
table.data th {
  text-align: left;
  font: 700 12px/1 var(--sans);
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted);
  padding: 14px 18px;
  background: var(--tint);
  border-bottom: 1px solid var(--hairline);
  white-space: nowrap;
}
table.data td {
  font: 400 14px/1.5 var(--sans); color: #33302A;
  padding: 14px 18px;
  border-bottom: 1px solid var(--hairline);
}
table.data tbody tr:last-child td { border-bottom: 0; }
table.data tbody tr:hover td { background: #FDFCFA; }
table.data td.num, table.data th.num { text-align: right; font-variant-numeric: tabular-nums; }

/* Sidebar */
.sidebar { display: flex; flex-direction: column; gap: 28px; min-width: 0; }
.sidebar__sticky { position: sticky; top: 100px; display: flex; flex-direction: column; gap: 28px; }
.toc { display: flex; flex-direction: column; gap: 4px; }
.toc__head {
  font: 700 11px/1 var(--sans);
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted);
  padding-bottom: 12px;
}
.toclink {
  font: 400 13.5px/1.45 var(--sans);
  color: var(--body);
  border-left: 2px solid var(--hairline);
  padding: 8px 0 8px 14px;
}
.toclink:hover { color: var(--accent); border-left-color: var(--input-border); }
.toclink.is-active { color: var(--accent); border-left-color: var(--accent); font-weight: 600; }

/* Dark sidebar tool card */
.toolpromo {
  background: var(--ink); border-color: var(--ink);
  padding: 26px;
  display: flex; flex-direction: column; gap: 14px;
}
.toolpromo__title { font-family: var(--serif); font-size: 21px; font-weight: 600; color: #fff; line-height: 1.3; }
.toolpromo__text  { font: 400 13.5px/1.55 var(--sans); color: var(--on-dark); }
.toolpromo .btn { align-self: flex-start; }

.related-list { display: flex; flex-direction: column; gap: 16px; }
.related-list__head {
  font: 700 11px/1 var(--sans);
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted);
}
.related-list a {
  font-family: var(--serif);
  font-size: 16.5px; line-height: 1.35; font-weight: 500;
  padding-bottom: 14px; border-bottom: 1px solid var(--hairline);
}
.related-list a:last-child { border-bottom: 0; padding-bottom: 0; }

/* FAQ */
.faq { display: flex; flex-direction: column; }
.faq__item { border-bottom: 1px solid var(--hairline); padding: 20px 0; }
.faq__item:first-child { border-top: 1px solid var(--hairline); }
.prose .faq__item p { font: 400 16px/1.65 var(--sans); color: #33302A; }
.faq__q,
.prose .faq__q { font-family: var(--serif); font-size: 20px; font-weight: 600; line-height: 1.3; margin: 0 0 10px; }

/* 9. APP & TOOL PAGES ==================================================== */

.apphero {
  display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 64px; padding: 64px 0; align-items: center;
}
.apphero__id { display: flex; align-items: center; gap: 18px; }
.apphero__icon {
  width: 72px; height: 72px; border-radius: 16px; flex-shrink: 0;
  display: block; object-fit: cover;
}
.apphero__title { font-family: var(--serif); font-size: 38px; font-weight: 600; color: #fff; letter-spacing: -0.01em; line-height: 1.15; }
.apphero__by  { font: 500 14px/1 var(--sans); color: var(--accent-dark); }
.apphero__dek { font: 400 16.5px/1.6 var(--sans); color: var(--on-dark); max-width: 540px; }
.store-row { display: flex; align-items: center; gap: 14px; margin-top: 6px; flex-wrap: wrap; }
.store-row__note {
  font: 400 12.5px/1.45 var(--sans); color: var(--on-dark); max-width: 30ch;
}
.appcard__cta { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-top: 2px; }
.appcard__cta .btn-sm { padding: 9px 15px; font-size: 13px; }
.feat {
  display: flex; align-items: center; gap: 10px;
  border: 1px solid var(--hairline); border-radius: var(--radius);
  background: var(--card);
  padding: 16px 18px;
  font: 500 14px/1.35 var(--sans);
}
.feat svg { flex-shrink: 0; }

.shots {
  display: flex; gap: 20px; overflow-x: auto;
  padding-bottom: 12px; -webkit-overflow-scrolling: touch;
  scroll-snap-type: x mandatory;
}
.shots img {
  width: 232px; flex-shrink: 0; scroll-snap-align: start;
  border: 1px solid var(--hairline); border-radius: 10px;
  background: var(--card);
}

.applist-card {
  padding: 22px 24px;
  display: flex; align-items: center; gap: 16px;
}
.applist-card img { width: 48px; height: 48px; border-radius: 11px; flex-shrink: 0; display: block; }
.applist-card__name { font: 700 15px/1.3 var(--sans); }
.applist-card__sub  { font: 400 12.5px/1.4 var(--sans); color: var(--muted); }

/* Tool cards */
.toolcard {
  background: var(--card); border: 1px solid var(--hairline);
  border-radius: var(--radius); padding: 24px;
  display: flex; flex-direction: column; gap: 12px;
  height: 100%;
}
a.toolcard:hover { border-color: var(--accent); }
.toolcard__name { font: 700 16px/1.3 var(--sans); }
.toolcard__text { font: 400 13.5px/1.5 var(--sans); color: var(--body); }
.toollink { font: 600 13px/1 var(--sans); color: var(--accent); margin-top: auto; }

/* Working calculator */
.calc {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px;
  align-items: start;
}
.calc__panel { padding: 28px; display: flex; flex-direction: column; gap: 18px; min-width: 0; }
.calc__results {
  background: var(--ink); border-color: var(--ink);
  padding: 28px; display: flex; flex-direction: column; gap: 18px; min-width: 0;
  position: sticky; top: 100px;
}
.calc__results h2, .calc__results h3 { color: #fff; }

.field { display: flex; flex-direction: column; gap: 7px; }
.field label { font: 600 12.5px/1 var(--sans); color: var(--body); }
.field input, .field select {
  border: 1px solid var(--input-border); border-radius: var(--radius-s);
  padding: 11px 14px; background: var(--card);
  font: 400 15px/1.2 var(--sans); color: var(--ink);
  outline: none; width: 100%;
  font-variant-numeric: tabular-nums;
}
.field input:focus, .field select:focus { border-color: var(--accent); }
.field__hint { font: 400 11.5px/1.4 var(--sans); color: var(--muted); }
.field-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 14px; }
.field-row-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }

.fieldset-head {
  font: 700 11px/1 var(--sans);
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted);
  padding-bottom: 2px;
}

/* Unit toggle */
.toggle {
  display: inline-flex; border: 1px solid var(--input-border);
  border-radius: var(--radius-s); overflow: hidden; background: var(--paper);
}
.toggle button {
  border: 0; background: none; cursor: pointer;
  padding: 9px 18px; font: 600 12.5px/1 var(--sans); color: var(--body);
}
.toggle button[aria-pressed='true'] { background: var(--ink); color: #fff; }

.result-row {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  padding: 12px 0; border-bottom: 1px solid var(--ink-border);
}
.result-row:last-child { border-bottom: 0; }
.result-row__label { font: 400 13.5px/1.4 var(--sans); color: var(--on-dark); }
.result-row__value {
  font-family: var(--serif); font-size: 22px; font-weight: 600; color: #fff;
  font-variant-numeric: tabular-nums; white-space: nowrap;
}
.result-row--major .result-row__value { font-size: 30px; color: var(--accent-dark); }

/* 10. RESPONSIVE ========================================================= */

@media (max-width: 1100px) {
  :root { --gutter: 28px; }

  .masthead .wrap { min-height: 68px; }
  .brand img { width: 168px; }
  .nav { gap: 20px; }
  .search { width: 168px; }

  .hero { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px; }
  .hero__lead { grid-column: span 2; }
  .hero__title { font-size: 34px; }

  .article-layout { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  /* One column: the contents list goes above the article; the tool card and
     related reading follow it instead of pushing the article down. */
  .sidebar, .sidebar__sticky { display: contents; }
  .sidebar .toc { order: -1; }
  .sidebar .toolpromo, .sidebar .related-list { order: 1; }
  .toc { flex-direction: row; flex-wrap: wrap; gap: 8px; }
  .toc__head { width: 100%; padding-bottom: 4px; }
  .toclink {
    border-left: 0; border: 1px solid var(--hairline);
    border-radius: 999px; padding: 8px 14px;
  }
  .toclink.is-active { border-color: var(--accent); }

  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }

  .term { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .term__body { grid-column: span 1; flex-direction: column; align-items: flex-start; gap: 20px; }

  .toolsband { grid-template-columns: minmax(0, 1fr); gap: 36px; }
  .apphero { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  .apphero__title { font-size: 32px; }

  .calc { grid-template-columns: minmax(0, 1fr); }
  .calc__results { position: static; }

  .site-footer__top { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 36px; }
  .article-title { font-size: 38px; }
  .page-title { font-size: 36px; }
}

@media (max-width: 768px) {
  :root { --gutter: 20px; }

  .section { padding-top: 40px; padding-bottom: 40px; }
  .section--wide { padding-top: 44px; padding-bottom: 44px; }

  /* Collapsing navigation */
  .nav-toggle { display: inline-flex; }
  .masthead .wrap { min-height: 62px; }
  .nav {
    display: none;
    position: absolute; left: 0; right: 0; top: 100%;
    background: var(--card);
    border-bottom: 1px solid var(--hairline);
    box-shadow: 0 12px 24px rgba(33, 30, 26, 0.07);
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 8px var(--gutter) 20px;
  }
  .nav.is-open { display: flex; }
  .nav a.navlink {
    padding: 14px 0; border-bottom: 1px solid var(--hairline-soft);
    font-size: 15.5px;
  }
  .nav a.navlink[aria-current='page'] { border-bottom-color: var(--hairline-soft); }
  .search { width: 100%; margin-top: 14px; }

  .utility .wrap { flex-direction: column; align-items: flex-start; gap: 6px; padding-top: 8px; padding-bottom: 8px; }
  .utility__links { gap: 18px; flex-wrap: wrap; }

  .hero { grid-template-columns: minmax(0, 1fr); gap: 32px; padding: 28px 0; }
  .hero__lead { grid-column: span 1; }
  .hero__title { font-size: 29px; }
  .hero__dek { font-size: 15.5px; }
  .thumb--hero { height: 220px; }

  .grid-3, .grid-4 { grid-template-columns: minmax(0, 1fr); gap: 28px; }

  .section-head { flex-direction: row; align-items: baseline; }
  .h-xl, .h-l { font-size: 25px; }
  .h-m { font-size: 22px; }
  .page-title { font-size: 30px; }
  .article-title { font-size: 30px; }
  .article-dek { font-size: 16.5px; }
  .prose p, .prose li { font-size: 17px; }
  .prose h2 { font-size: 24px; }

  .toolsband__title { font-size: 25px; }
  .toolsband__grid { grid-template-columns: minmax(0, 1fr); }

  .newsletter .wrap,
  .promoband,
  .promoband .wrap,
  .split .wrap { flex-direction: column; align-items: flex-start; gap: 24px; }
  .newsletter__form { width: 100%; flex-direction: column; }
  .newsletter__form input[type='email'] { width: 100%; }
  .promoband__left { flex-direction: column; align-items: flex-start; gap: 16px; }

  .promo-card { flex-wrap: wrap; gap: 16px; }
  .promo-card .btn { margin-left: 0; width: 100%; }

  .takeaways { padding: 22px 20px; }
  .formula { padding: 20px 20px; }
  .formula code, .formula__eq { font-size: 14.5px; }

  .byline__actions { margin-left: 0; width: 100%; }

  .field-row, .field-row-3 { grid-template-columns: minmax(0, 1fr); }

  .site-footer__top { grid-template-columns: minmax(0, 1fr); gap: 28px; padding: 40px 0 28px; }
  .site-footer__bottom .wrap { flex-direction: column; align-items: flex-start; gap: 8px; }
}

@media (max-width: 480px) {
  :root { --gutter: 16px; }

  .brand img { width: 148px; }
  .hero__title { font-size: 26px; }
  .article-title { font-size: 26px; }
  .page-title { font-size: 26px; }
  .term__word { font-size: 28px; }
  .thumb--hero { height: 180px; }
  .thumb--lg, .thumb--md { height: 160px; }

  .btn, .btn-ghost { width: 100%; }
  .store-row { flex-direction: column; align-items: flex-start; }
  .store-row__note { max-width: none; }
  .split .wrap > div:last-child { width: 100%; display: flex; flex-direction: column; gap: 12px; }

  .chip { padding: 9px 15px; font-size: 13px; }
  .shots img { width: 190px; }
  table.data th, table.data td { padding: 11px 13px; font-size: 13px; }
}

/* Search page ------------------------------------------------------------ */
.searchpage__form { display: flex; gap: 10px; margin-top: 6px; flex-wrap: wrap; }
.searchpage__form input {
  flex: 1 1 340px; min-width: 0;
  border: 1px solid var(--input-border); border-radius: var(--radius-s);
  background: var(--card); padding: 13px 16px;
  font: 400 15px/1 var(--sans); color: var(--ink);
}
.searchpage__form input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.searchpage__status { font: 500 13.5px/1.5 var(--sans); color: var(--muted); margin-top: 12px; }

.searchpage__filters { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 26px; }
.searchpage__filters .chip { cursor: pointer; font-family: var(--sans); }

.sresult {
  display: flex; flex-direction: column; gap: 7px;
  padding-bottom: 20px; margin-bottom: 20px;
  border-bottom: 1px solid var(--hairline);
}
.sresult:last-child { border-bottom: 0; margin-bottom: 0; }
.sresult__kind {
  font: 600 11px/1 var(--sans); letter-spacing: .09em; text-transform: uppercase;
  color: var(--accent);
}
.sresult__title { font: 500 21px/1.3 var(--serif); color: var(--ink); }
.sresult__title a { color: inherit; text-decoration: none; }
.sresult__title a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.sresult__desc { font: 400 15px/1.6 var(--sans); color: var(--body); max-width: 68ch; }
.sresult mark { background: #FBE8D0; color: inherit; padding: 0 1px; border-radius: 2px; }

@media (max-width: 480px) {
  .searchpage__form input { flex-basis: 100%; }
  .searchpage__form .btn { width: 100%; }
  .sresult__title { font-size: 19px; }
}

/* Print ------------------------------------------------------------------ */
@media print {
  .utility, .masthead, .site-footer, .sidebar, .toolsband, .newsletter, .promo-card { display: none !important; }
  body { background: #fff; }
  .article-layout { grid-template-columns: minmax(0, 1fr); padding: 0; }
  .prose p, .prose li { font-size: 11pt; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* 11. CALCULATOR UI ====================================================== */

/* A <form> inside the panel must carry the panel's own column gap. */
.calc__panel > form {
  display: flex; flex-direction: column; gap: 18px;
}
.calc__panel .fieldset-head { margin-top: 6px; }
.calc__panel .fieldset-head:first-child { margin-top: 0; }

.field input[type='number'] { -moz-appearance: textfield; }
.field input:disabled,
table.data input:disabled {
  background: var(--tint); color: var(--muted); cursor: not-allowed;
}

.field-check {
  display: flex; align-items: center; gap: 10px;
  font: 500 13.5px/1.3 var(--sans); color: var(--body);
}
.field-check input { width: 17px; height: 17px; accent-color: var(--accent); flex-shrink: 0; }

.field-suffix { position: relative; display: block; }
.field-suffix input { padding-right: 46px; }
.field-suffix span {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  font: 500 12.5px/1 var(--sans); color: var(--muted); pointer-events: none;
}

/* Editable cells inside a data table (BBS rows, cost stages) */
table.data input,
table.data select {
  width: 100%; min-width: 62px;
  border: 1px solid var(--input-border); border-radius: var(--radius-s);
  padding: 7px 9px; background: var(--card);
  font: 400 13px/1.2 var(--sans); color: var(--ink);
  outline: none; font-variant-numeric: tabular-nums;
}
table.data input:focus, table.data select:focus { border-color: var(--accent); }
table.data td { vertical-align: middle; }
table.data.compact th, table.data.compact td { padding: 8px 10px; }

.btn-row {
  width: 30px; height: 30px; padding: 0;
  border: 1px solid var(--input-border); border-radius: var(--radius-s);
  background: var(--card); color: var(--muted);
  font: 400 18px/1 var(--sans); cursor: pointer;
}
.btn-row:hover { border-color: var(--accent); color: var(--accent); }

.calc__actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }

/* Result panel extras */
.calc__results .result-note {
  font: 400 12.5px/1.5 var(--sans); color: var(--muted);
  padding-top: 4px;
}
.calc__results .formula {
  background: #191713; border: 1px solid var(--ink-border); padding: 16px 18px;
}
.calc__results .formula code { font-size: 13.5px; }

.calc-warn {
  display: block;
  background: rgba(180, 83, 9, 0.08);
  border-left: 3px solid var(--accent);
  padding: 12px 16px; border-radius: 0 var(--radius-s) var(--radius-s) 0;
  font: 500 13px/1.5 var(--sans); color: var(--accent-hover);
}

/* Wide calculators (BBS, cost) use the full column instead of a 2-up split */
.calc--wide { grid-template-columns: minmax(0, 1fr); }
.calc--wide .calc__results { position: static; }

.tool-explainer { max-width: 760px; }
.tool-explainer p, .tool-explainer li {
  font: 400 16px/1.7 var(--sans); color: #33302A;
}
.tool-explainer ul, .tool-explainer ol {
  padding-left: 22px; display: flex; flex-direction: column; gap: 8px;
}
.tool-explainer li::marker { color: var(--accent); }
.tool-explainer a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

@media (max-width: 768px) {
  .calc__panel, .calc__results { padding: 20px; }
  .calc__results .result-row__value { font-size: 19px; }
  .calc__results .result-row--major .result-row__value { font-size: 25px; }
  .result-row { flex-wrap: wrap; gap: 4px; }
}