/* ============================================================
   DIVIDEND CALCULATOR — main.css
   "Heritage Ledger" design system
   ============================================================ */

/* --- Custom properties --- */
:root {
  --green:       #1a3d2b;
  --green-mid:   #2c5f42;
  --green-light: #e8f2ec;
  --brass:       #b5892a;
  --brass-light: #f5e9c8;
  --paper:       #faf8f3;
  --paper-dark:  #f0ede4;
  --slate:       #3a3d3c;
  --slate-mid:   #5c6360;
  --slate-light: #8c9290;
  --white:       #ffffff;
  --border:      #d4cfc4;
  --shadow:      0 2px 12px rgba(26,61,43,.10);
  --radius:      6px;
  --font-body:   -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                 "Helvetica Neue", Arial, "Liberation Sans", sans-serif;
  --font-mono:   "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono",
                 Consolas, "Courier New", monospace;
  --tabular:     "tnum", "tabular-nums";
  --transition:  160ms ease;
}

/* --- Reset & base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--slate);
  line-height: 1.65;
  min-height: 100vh;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--green-mid); }
a:hover { color: var(--brass); }

/* --- Typography --- */
h1, h2, h3, h4 {
  color: var(--green);
  line-height: 1.25;
  font-weight: 700;
}
h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); margin-bottom: .5rem; }
h2 { font-size: clamp(1.25rem, 3vw, 1.75rem); margin-bottom: .75rem; }
h3 { font-size: 1.125rem; margin-bottom: .5rem; }
h4 { font-size: 1rem; margin-bottom: .25rem; }
p  { margin-bottom: 1rem; }
ul, ol { margin-bottom: 1rem; padding-left: 1.5rem; }
li { margin-bottom: .35rem; }

/* --- Layout --- */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* --- Site header --- */
.site-header {
  background: var(--green);
  color: var(--paper);
  padding: .75rem 0;
  border-bottom: 3px solid var(--brass);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
}
.site-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--paper);
  text-decoration: none;
  letter-spacing: .03em;
}
.site-logo span { color: var(--brass); }
.site-nav a {
  color: var(--paper);
  text-decoration: none;
  font-size: .875rem;
  margin-left: 1.25rem;
  opacity: .85;
  transition: opacity var(--transition);
}
.site-nav a:hover, .site-nav a[aria-current="page"] { opacity: 1; color: var(--brass); }

/* --- Hero / page header --- */
.page-hero {
  background: linear-gradient(135deg, var(--green) 0%, var(--green-mid) 100%);
  color: var(--paper);
  padding: 3rem 0 2.5rem;
  text-align: center;
}
.page-hero h1 { color: var(--white); margin-bottom: .75rem; }
.page-hero .tagline {
  font-size: 1.1rem;
  color: var(--brass-light);
  max-width: 620px;
  margin: 0 auto;
}

/* --- Main content area --- */
main { padding: 2.5rem 0 3rem; }

/* --- Card / panel --- */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.75rem;
  margin-bottom: 2rem;
}
.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--green);
  text-transform: uppercase;
  letter-spacing: .08em;
  border-bottom: 2px solid var(--brass);
  padding-bottom: .5rem;
  margin-bottom: 1.25rem;
}

/* --- Form grid --- */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.1rem 1.5rem;
}

.form-group { display: flex; flex-direction: column; gap: .35rem; }

label {
  font-size: .8125rem;
  font-weight: 600;
  color: var(--slate-mid);
  letter-spacing: .04em;
  text-transform: uppercase;
}

input[type="number"],
input[type="text"],
select {
  width: 100%;
  padding: .55rem .75rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--slate);
  font-family: var(--font-body);
  font-size: .9375rem;
  font-variant-numeric: var(--tabular);
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
}
input[type="number"]:focus,
input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--green-mid);
  box-shadow: 0 0 0 3px rgba(44,95,66,.15);
}
/* Remove number spinners */
input[type="number"] { -moz-appearance: textfield; }
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; }

/* Select arrow */
.select-wrap { position: relative; }
.select-wrap select { padding-right: 2rem; }
.select-wrap::after {
  content: "▾";
  position: absolute;
  right: .65rem;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--slate-mid);
  font-size: .75rem;
}

/* Toggle / checkbox */
.toggle-group {
  display: flex;
  align-items: center;
  gap: .6rem;
  flex-direction: row;
  padding-top: 1.1rem;
}
.toggle-group label {
  text-transform: none;
  letter-spacing: 0;
  font-size: .9rem;
  font-weight: 600;
  color: var(--slate);
  cursor: pointer;
}
/* Custom checkbox */
.toggle-group input[type="checkbox"] {
  appearance: none;
  width: 2.5rem;
  height: 1.35rem;
  background: var(--border);
  border-radius: 1rem;
  position: relative;
  cursor: pointer;
  transition: background var(--transition);
  flex-shrink: 0;
  border: none;
  padding: 0;
}
.toggle-group input[type="checkbox"]::after {
  content: "";
  position: absolute;
  width: 1rem;
  height: 1rem;
  background: var(--white);
  border-radius: 50%;
  top: .175rem;
  left: .175rem;
  transition: transform var(--transition);
  box-shadow: 0 1px 3px rgba(0,0,0,.25);
}
.toggle-group input[type="checkbox"]:checked { background: var(--green-mid); }
.toggle-group input[type="checkbox"]:checked::after { transform: translateX(1.15rem); }
.toggle-group input[type="checkbox"]:focus {
  outline: 3px solid rgba(44,95,66,.35);
  outline-offset: 2px;
}

/* --- Calculate button --- */
.btn-calc {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  margin-top: 1.25rem;
  padding: .75rem 2rem;
  background: var(--green);
  color: var(--white);
  border: none;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: .03em;
  transition: background var(--transition), transform var(--transition);
}
.btn-calc:hover { background: var(--green-mid); }
.btn-calc:active { transform: scale(.98); }
.btn-calc:focus {
  outline: 3px solid rgba(44,95,66,.35);
  outline-offset: 3px;
}

/* --- Results summary cards --- */
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.result-tile {
  background: var(--green-light);
  border: 1px solid rgba(44,95,66,.2);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  text-align: center;
}
.result-tile.highlight {
  background: var(--green);
  color: var(--white);
}
.result-tile .tile-label {
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--slate-mid);
  margin-bottom: .3rem;
}
.result-tile.highlight .tile-label { color: var(--brass-light); }
.result-tile .tile-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--green);
  font-variant-numeric: var(--tabular);
  line-height: 1.15;
}
.result-tile.highlight .tile-value { color: var(--white); }
.result-tile .tile-sub {
  font-size: .7rem;
  color: var(--slate-light);
  margin-top: .2rem;
}
.result-tile.highlight .tile-sub { color: var(--brass-light); }

/* Brass accent tile */
.result-tile.accent {
  background: var(--brass-light);
  border-color: var(--brass);
}
.result-tile.accent .tile-label { color: #7a5c12; }
.result-tile.accent .tile-value { color: #7a5c12; }

/* --- Chart area --- */
.chart-wrap {
  position: relative;
  width: 100%;
  overflow: hidden;
}
#snowball-chart {
  width: 100%;
  height: auto;
  display: block;
}

/* Chart legend */
.chart-legend {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-top: .75rem;
  font-size: .8125rem;
  color: var(--slate-mid);
}
.legend-item { display: flex; align-items: center; gap: .4rem; }
.legend-swatch {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  flex-shrink: 0;
}

/* --- Year-by-year table --- */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
  font-variant-numeric: var(--tabular);
  white-space: nowrap;
}
thead {
  background: var(--green);
  color: var(--white);
  position: sticky;
  top: 0;
}
thead th {
  padding: .6rem .9rem;
  text-align: right;
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
}
thead th:first-child { text-align: center; }
tbody tr:nth-child(even) { background: var(--paper-dark); }
tbody tr:hover { background: var(--brass-light); }
tbody td {
  padding: .5rem .9rem;
  text-align: right;
  color: var(--slate);
  border-bottom: 1px solid var(--border);
}
tbody td:first-child { text-align: center; font-weight: 600; color: var(--green-mid); }

/* --- Income-goal calculator --- */
.goal-calc {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem 1.5rem;
  align-items: end;
}
.goal-result {
  margin-top: 1.25rem;
  padding: 1.1rem 1.25rem;
  background: var(--brass-light);
  border: 1px solid var(--brass);
  border-radius: var(--radius);
  display: none;
}
.goal-result.visible { display: block; }
.goal-result .amount {
  font-size: 2rem;
  font-weight: 700;
  color: #7a5c12;
  font-variant-numeric: var(--tabular);
}
.goal-result p { font-size: .875rem; color: var(--slate-mid); margin-top: .35rem; margin-bottom: 0; }

/* --- Content sections --- */
.content-section {
  margin-bottom: 2.5rem;
}
.content-section h2 { margin-top: 0; }

/* --- Formula block --- */
.formula-block {
  background: var(--paper-dark);
  border-left: 4px solid var(--brass);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
  font-family: var(--font-mono);
  font-size: .875rem;
  color: var(--slate);
  overflow-x: auto;
}

/* --- Glossary --- */
.glossary { list-style: none; padding: 0; }
.glossary li {
  padding: .65rem 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: .75rem;
}
.glossary li:last-child { border-bottom: none; }
.glossary .term { font-weight: 700; color: var(--green-mid); }
@media (max-width: 520px) {
  .glossary li { grid-template-columns: 1fr; }
}

/* --- FAQ --- */
.faq-list { list-style: none; padding: 0; }
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-item:last-child { border-bottom: none; }
.faq-question {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  padding: 1rem 0;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--green);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.faq-question:focus {
  outline: 2px solid var(--green-mid);
  outline-offset: 2px;
  border-radius: 2px;
}
.faq-icon {
  font-size: 1.25rem;
  line-height: 1;
  color: var(--brass);
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-item[open] .faq-icon { transform: rotate(45deg); }
.faq-answer {
  padding: 0 0 1rem;
  color: var(--slate);
  font-size: .9375rem;
}
.faq-answer p:last-child { margin-bottom: 0; }

/* --- Disclaimer --- */
.disclaimer {
  background: var(--paper-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .85rem 1.1rem;
  font-size: .8125rem;
  color: var(--slate-mid);
  margin-top: 2rem;
}
.disclaimer strong { color: var(--slate); }

/* --- Footer --- */
.site-footer {
  background: var(--green);
  color: rgba(250,248,243,.7);
  padding: 1.5rem 0;
  font-size: .8125rem;
  text-align: center;
  margin-top: 3rem;
}
.site-footer a { color: var(--brass); }

/* --- Hidden until calculated --- */
#results-section { display: none; }
#results-section.visible { display: block; }

/* --- Utility --- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   Responsive tweaks
   ============================================================ */
@media (max-width: 640px) {
  .card { padding: 1.25rem 1rem; }
  .form-grid { grid-template-columns: 1fr 1fr; }
  h1 { font-size: 1.6rem; }
  .results-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 400px) {
  .form-grid { grid-template-columns: 1fr; }
  .results-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   ARTICLE / BLOG styles
   ============================================================ */

.article-hero {
  background: linear-gradient(135deg, var(--green) 0%, var(--green-mid) 100%);
  color: var(--paper);
  padding: 3rem 0 2.5rem;
}
.article-hero h1 { color: var(--white); font-size: clamp(1.5rem, 3.5vw, 2.2rem); margin-bottom: .5rem; }
.article-meta { font-size: .875rem; color: var(--brass-light); margin-top: .5rem; }
.article-meta span { margin-right: 1.25rem; }

.article-body { max-width: 760px; margin: 0 auto; padding: 2.5rem 0 3rem; }
.article-body h2 { margin-top: 2.25rem; margin-bottom: .75rem; }
.article-body h3 { margin-top: 1.75rem; color: var(--green-mid); }
.article-body p { font-size: 1.0125rem; line-height: 1.75; margin-bottom: 1.1rem; }
.article-body ul, .article-body ol { font-size: 1.0125rem; line-height: 1.75; margin-bottom: 1.1rem; }
.article-body li { margin-bottom: .5rem; }
.article-body strong { color: var(--green); }

/* Pull quote */
.pull-quote {
  border-left: 4px solid var(--brass);
  background: var(--brass-light);
  padding: 1.1rem 1.5rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.75rem 0;
  font-size: 1.1rem;
  font-weight: 600;
  color: #7a5c12;
  font-style: italic;
}

/* Data table inside articles */
.data-table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9375rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.data-table thead { background: var(--green); color: var(--white); }
.data-table thead th { padding: .65rem 1rem; text-align: right; font-size: .8125rem; text-transform: uppercase; letter-spacing: .06em; }
.data-table thead th:first-child { text-align: left; }
.data-table tbody tr:nth-child(even) { background: var(--paper-dark); }
.data-table tbody td { padding: .55rem 1rem; text-align: right; border-bottom: 1px solid var(--border); }
.data-table tbody td:first-child { text-align: left; font-weight: 600; color: var(--green-mid); }

/* CTA box */
.article-cta {
  background: var(--green);
  color: var(--white);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  margin: 2.5rem 0;
  text-align: center;
}
.article-cta h3 { color: var(--white); margin-bottom: .5rem; }
.article-cta p { color: var(--brass-light); margin-bottom: 1.1rem; font-size: .9375rem; }
.article-cta .btn-calc { margin: 0 auto; }

/* SVG diagram wrapper */
.diagram-wrap {
  margin: 2rem 0;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  overflow-x: auto;
}
.diagram-caption {
  font-size: .8125rem;
  color: var(--slate-mid);
  text-align: center;
  margin-top: .75rem;
  font-style: italic;
}

/* Blog index */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}
.blog-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), transform var(--transition);
}
.blog-card:hover { box-shadow: 0 6px 24px rgba(26,61,43,.15); transform: translateY(-2px); }
.blog-card-body { padding: 1.25rem 1.5rem; flex: 1; }
.blog-card-tag {
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--brass);
  margin-bottom: .5rem;
}
.blog-card h2 { font-size: 1.1rem; margin-bottom: .5rem; }
.blog-card h2 a { color: var(--green); text-decoration: none; }
.blog-card h2 a:hover { color: var(--brass); }
.blog-card p { font-size: .875rem; color: var(--slate-mid); margin-bottom: 0; }
.blog-card-footer {
  padding: .75rem 1.5rem;
  border-top: 1px solid var(--border);
  font-size: .8rem;
  color: var(--slate-light);
  display: flex;
  justify-content: space-between;
}

/* Article nav breadcrumb */
.breadcrumb {
  font-size: .8125rem;
  color: var(--slate-mid);
  padding: .75rem 0;
  margin-bottom: .5rem;
}
.breadcrumb a { color: var(--slate-mid); }
.breadcrumb span { margin: 0 .4rem; }