/* WalletCalcs — shared stylesheet */
:root {
  --bg: #f6f8fa;
  --surface: #ffffff;
  --ink: #1a2332;
  --ink-soft: #4a5568;
  --ink-faint: #718096;
  --brand: #0b6e4f;
  --brand-dark: #08523b;
  --brand-soft: #e6f4ef;
  --accent: #f0b429;
  --border: #e2e8f0;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.08), 0 4px 16px rgba(16, 24, 40, 0.06);
  --max-width: 860px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  font-size: 17px;
}

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.logo {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.logo span { color: var(--brand); }
.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  margin-left: 20px;
}
.site-nav a:hover { color: var(--brand); }

/* Breadcrumb */
.breadcrumb {
  font-size: 0.85rem;
  color: var(--ink-faint);
  margin: 20px 0 8px;
}
.breadcrumb a { color: var(--brand); text-decoration: none; }

/* Page title */
.page-title { font-size: 2rem; letter-spacing: -0.02em; line-height: 1.2; margin-bottom: 8px; }
.page-subtitle { color: var(--ink-soft); font-size: 1.05rem; margin-bottom: 28px; }

/* Calculator card */
.calc-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  margin-bottom: 40px;
}
.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px 24px;
  margin-bottom: 8px;
}
.calc-grid .full { grid-column: 1 / -1; }
.field label {
  display: block;
  font-weight: 600;
  font-size: 0.88rem;
  margin-bottom: 6px;
  color: var(--ink-soft);
}
.field .hint { font-weight: 400; color: var(--ink-faint); }
.input-wrap { position: relative; }
.input-wrap .prefix,
.input-wrap .suffix {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ink-faint);
  font-size: 0.95rem;
  pointer-events: none;
}
.input-wrap .prefix { left: 12px; }
.input-wrap .suffix { right: 12px; }
input[type="number"], input[type="text"], select {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--ink);
  background: #fff;
  transition: border-color 0.15s;
}
.input-wrap .prefix ~ input { padding-left: 28px; }
.input-wrap .suffix ~ input { padding-right: 34px; }
input:focus, select:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(11, 110, 79, 0.12);
}
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; }
input[type="number"] { -moz-appearance: textfield; appearance: textfield; }

/* Results */
.results {
  margin-top: 22px;
  border-top: 1px solid var(--border);
  padding-top: 22px;
}
.result-hero {
  background: var(--brand-soft);
  border-radius: 10px;
  padding: 18px 22px;
  margin-bottom: 16px;
}
.result-hero .label { font-size: 0.85rem; font-weight: 600; color: var(--brand-dark); text-transform: uppercase; letter-spacing: 0.04em; }
.result-hero .value { font-size: 2.1rem; font-weight: 800; color: var(--brand-dark); letter-spacing: -0.02em; }
.result-hero .sub { color: var(--ink-soft); font-size: 0.92rem; }
.result-rows { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 24px; }
.result-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 0.95rem;
}
.result-row .k { color: var(--ink-soft); }
.result-row .v { font-weight: 700; white-space: nowrap; }
.result-note { margin-top: 14px; font-size: 0.88rem; color: var(--ink-faint); }

/* Data tables (amortization etc.) */
.table-wrap { overflow-x: auto; margin-top: 18px; }
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
table.data th, table.data td {
  padding: 8px 10px;
  text-align: right;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
table.data th {
  background: var(--bg);
  color: var(--ink-soft);
  font-weight: 700;
  position: sticky;
  top: 0;
}
table.data th:first-child, table.data td:first-child { text-align: left; }

/* Article content */
article.content h2 {
  font-size: 1.45rem;
  letter-spacing: -0.01em;
  margin: 36px 0 12px;
}
article.content h3 { font-size: 1.15rem; margin: 26px 0 10px; }
article.content p { margin-bottom: 14px; color: var(--ink-soft); }
article.content ul, article.content ol { margin: 0 0 14px 24px; color: var(--ink-soft); }
article.content li { margin-bottom: 6px; }
article.content strong { color: var(--ink); }
article.content .formula {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--brand);
  border-radius: 8px;
  padding: 14px 18px;
  font-family: "SF Mono", Consolas, monospace;
  font-size: 0.92rem;
  margin: 14px 0;
  overflow-x: auto;
}
article.content table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 0.92rem; }
article.content table th, article.content table td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}
article.content table th { background: var(--surface); }

/* FAQ */
.faq { margin-top: 36px; }
.faq h2 { font-size: 1.45rem; margin-bottom: 16px; }
.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0;
  margin-bottom: 10px;
}
.faq summary {
  cursor: pointer;
  font-weight: 700;
  padding: 15px 18px;
  list-style: none;
  position: relative;
}
.faq summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  color: var(--brand);
  font-weight: 800;
}
.faq details[open] summary::after { content: "\2212"; }
.faq .faq-a { padding: 0 18px 15px; color: var(--ink-soft); }

/* Related tools */
.related { margin-top: 40px; }
.related h2 { font-size: 1.25rem; margin-bottom: 14px; }
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}
.tool-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  text-decoration: none;
  color: var(--ink);
  transition: border-color 0.15s, transform 0.15s;
}
.tool-card:hover { border-color: var(--brand); transform: translateY(-2px); }
.tool-card .t { font-weight: 700; margin-bottom: 4px; }
.tool-card .d { font-size: 0.85rem; color: var(--ink-faint); line-height: 1.45; }

/* Home hero */
.hero { text-align: center; padding: 48px 0 36px; }
.hero h1 { font-size: 2.4rem; letter-spacing: -0.03em; line-height: 1.15; margin-bottom: 12px; }
.hero p { color: var(--ink-soft); font-size: 1.1rem; max-width: 560px; margin: 0 auto; }
.category { margin: 36px 0 12px; font-size: 1.3rem; }

/* Ad slots (filled after AdSense approval; collapsed until then) */
.ad-slot { margin: 28px 0; text-align: center; min-height: 0; }

/* Footer */
.site-footer {
  margin-top: 64px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 32px 0;
  font-size: 0.85rem;
  color: var(--ink-faint);
}
.site-footer .container { display: flex; flex-direction: column; gap: 10px; }
.site-footer a { color: var(--ink-soft); text-decoration: none; margin-right: 16px; }
.site-footer .disclaimer { max-width: 720px; }

@media (max-width: 640px) {
  body { font-size: 16px; }
  .calc-grid { grid-template-columns: 1fr; }
  .result-rows { grid-template-columns: 1fr; }
  .page-title { font-size: 1.55rem; }
  .hero h1 { font-size: 1.8rem; }
  .calc-card { padding: 20px 16px; }
}