/* Shared styles for /tools/ pages — palette matches the main site */
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 400 800; font-display: swap;
  src: url(/fonts/inter-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 400 800; font-display: swap;
  src: url(/fonts/inter-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF; }
/* Arial resized per weight to Inter's metrics, so text doesn't reflow when Inter loads */
@font-face { font-family: 'Inter Fallback'; font-weight: 400 500; src: local('Arial'), local('ArialMT'), local('Liberation Sans'), local('Helvetica');
  size-adjust: 105.4%; ascent-override: 91.92%; descent-override: 22.98%; line-gap-override: 0%; }
@font-face { font-family: 'Inter Fallback'; font-weight: 600 700; src: local('Arial Bold'), local('Arial-BoldMT'), local('Liberation Sans Bold'), local('Helvetica Bold');
  size-adjust: 101.4%; ascent-override: 95.54%; descent-override: 23.89%; line-gap-override: 0%; }
@font-face { font-family: 'Inter Fallback'; font-weight: 800; src: local('Arial Bold'), local('Arial-BoldMT'), local('Liberation Sans Bold'), local('Helvetica Bold');
  size-adjust: 103.0%; ascent-override: 94.06%; descent-override: 23.51%; line-gap-override: 0%; }
:root {
  --navy: #1e3a8a;
  --blue: #1d4ed8;
  --green: #10b981;
  --green-dark: #059669;
  --surface: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --body: #475569;
  --muted: #64748b;
  --border: #e2e8f0;
  --accent: #7F77DD;
  --warn-bg: #fffbeb;
  --warn-text: #92400e;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', 'Inter Fallback', sans-serif; background: var(--surface); color: var(--text); line-height: 1.6; }
a { color: var(--blue); }

/* Header */
.site-header { background: #0f172a; position: sticky; top: 0; z-index: 10; }
.site-header .wrap { max-width: 1100px; margin: 0 auto; padding: 14px 16px; display: flex; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-weight: 800; font-size: 19px; letter-spacing: -0.5px; }
.brand img { width: 30px; height: 30px; }
.brand .accent { color: var(--accent); }
.site-header nav { display: flex; align-items: center; gap: 22px; margin-left: auto; }
.site-header nav a { color: rgba(255,255,255,0.75); text-decoration: none; font-size: 14px; font-weight: 500; }
.site-header nav a:hover, .site-header nav a[aria-current="page"] { color: #fff; }
.site-header nav .btn { background: var(--green); color: #fff; padding: 8px 16px; border-radius: 8px; font-weight: 600; }
.site-header nav .btn:hover { background: var(--green-dark); }

/* Page hero */
.page-hero { background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 60%, #1d4ed8 100%); color: #fff; padding: 40px 16px 56px; }
.page-hero .wrap { max-width: 1100px; margin: 0 auto; }
.crumbs { font-size: 13px; color: rgba(255,255,255,0.6); margin-bottom: 14px; }
.crumbs a { color: rgba(255,255,255,0.75); text-decoration: none; }
.crumbs a:hover { color: #fff; }
.page-hero h1 { font-size: 36px; font-weight: 800; letter-spacing: -0.8px; line-height: 1.15; margin-bottom: 10px; }
.page-hero p { color: rgba(255,255,255,0.78); font-size: 17px; max-width: 680px; }

main { max-width: 1100px; margin: -32px auto 0; padding: 0 16px 64px; }

/* Calculator card */
.calc { background: var(--card); border: 1px solid var(--border); border-radius: 14px; box-shadow: 0 10px 30px rgba(15,23,42,0.08); display: grid; grid-template-columns: 1fr 1fr; overflow: hidden; }
.calc-inputs { padding: 28px; border-right: 1px solid var(--border); }
.calc-results { padding: 28px; background: #fbfcfe; }
.calc h2 { font-size: 15px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.8px; color: var(--muted); margin-bottom: 18px; }

.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.field .hint { font-size: 12px; color: var(--muted); margin-top: 4px; }
.field input, .field select { width: 100%; font: inherit; font-size: 15px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; background: #fff; color: var(--text); }
.field input:focus, .field select:focus { outline: 2px solid #bfdbfe; border-color: var(--blue); }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.prefix { position: relative; }
.prefix span { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: 15px; }
.prefix input { padding-left: 28px; }
.seg { display: flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.seg label { flex: 1; margin: 0; text-align: center; padding: 9px 6px; font-size: 13px; font-weight: 600; color: var(--body); cursor: pointer; border-right: 1px solid var(--border); }
.seg label:last-child { border-right: none; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label:has(input:checked) { background: var(--navy); color: #fff; }
.seg label:has(input:focus-visible) { outline: 2px solid #bfdbfe; outline-offset: -2px; }

/* Results */
.big { background: var(--navy); color: #fff; border-radius: 12px; padding: 18px 20px; margin-bottom: 16px; }
.big .label { font-size: 13px; color: rgba(255,255,255,0.7); }
.big .value { font-size: 30px; font-weight: 800; letter-spacing: -0.5px; font-variant-numeric: tabular-nums; }
.big .sub { font-size: 13px; color: rgba(255,255,255,0.7); margin-top: 2px; }
.lines { list-style: none; }
.lines li { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 14px; color: var(--body); }
.lines li strong { color: var(--text); font-variant-numeric: tabular-nums; text-align: right; }
.lines li.total { border-bottom: none; font-weight: 700; color: var(--text); font-size: 15px; }
.note { font-size: 13px; color: var(--body); background: #eff6ff; border-radius: 8px; padding: 10px 12px; margin-top: 14px; }
.note.warn { background: var(--warn-bg); color: var(--warn-text); }

/* Tables */
.table-wrap { overflow-x: auto; margin-top: 8px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 9px 10px; text-align: right; border-bottom: 1px solid var(--border); white-space: nowrap; font-variant-numeric: tabular-nums; }
th:first-child, td:first-child { text-align: left; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--muted); font-weight: 700; background: var(--surface); }
tr.bump td { background: #ecfdf5; }

/* Content */
.content { max-width: 760px; margin: 48px auto 0; }
.content h2 { font-size: 24px; font-weight: 800; letter-spacing: -0.4px; margin: 36px 0 10px; }
.content h3 { font-size: 17px; font-weight: 700; margin: 22px 0 6px; }
.content p, .content li { color: var(--body); font-size: 15.5px; }
.content p { margin-bottom: 12px; }
.content ul, .content ol { margin: 0 0 12px 22px; }
.content li { margin-bottom: 6px; }
.content code { background: #eef2ff; padding: 1px 6px; border-radius: 4px; font-size: 14px; }
.formula { background: var(--card); border: 1px solid var(--border); border-left: 4px solid var(--navy); border-radius: 8px; padding: 12px 16px; margin: 12px 0 16px; font-size: 15px; color: var(--text); }

details { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 14px 18px; margin-bottom: 10px; }
summary { font-weight: 600; cursor: pointer; color: var(--text); }
details p { margin: 10px 0 0; }

/* CTA */
.cta { background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%); color: #fff; border-radius: 14px; padding: 28px; margin: 40px 0 0; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.cta h2 { color: #fff; margin: 0 0 4px; font-size: 21px; }
.cta p { color: rgba(255,255,255,0.75); margin: 0; font-size: 15px; }
.cta a { background: var(--green); color: #fff; text-decoration: none; font-weight: 600; padding: 12px 20px; border-radius: 8px; white-space: nowrap; }
.cta a:hover { background: var(--green-dark); }

/* Tools index cards */
.tool-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.tool-card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 24px; text-decoration: none; color: inherit; box-shadow: 0 4px 16px rgba(15,23,42,0.05); transition: box-shadow 0.2s, transform 0.2s; display: block; }
.tool-card:hover { box-shadow: 0 12px 30px rgba(15,23,42,0.12); transform: translateY(-2px); }
.tool-card .icon { width: 44px; height: 44px; border-radius: 10px; background: #eff6ff; display: flex; align-items: center; justify-content: center; margin-bottom: 14px; }
.tool-card h2 { font-size: 18px; font-weight: 700; margin-bottom: 6px; color: var(--text); }
.tool-card p { font-size: 14.5px; color: var(--body); }
.tool-card .go { display: inline-block; margin-top: 12px; font-size: 14px; font-weight: 600; color: var(--blue); }

/* Related tools strip */
.related { margin-top: 40px; }
.related h2 { margin-top: 0; }
.related ul { list-style: none; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.related a { display: block; background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; text-decoration: none; font-weight: 600; font-size: 14.5px; color: var(--text); }
.related a:hover { border-color: var(--blue); color: var(--blue); }

footer.site-footer { text-align: center; padding: 28px 16px; font-size: 13px; color: var(--muted); border-top: 1px solid var(--border); margin-top: 40px; }
footer.site-footer a { color: var(--muted); margin: 0 8px; }

@media (max-width: 820px) {
  .calc { grid-template-columns: 1fr; }
  .calc-inputs { border-right: none; border-bottom: 1px solid var(--border); }
  .tool-grid, .related ul { grid-template-columns: 1fr; }
  .cta { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 640px) {
  .site-header nav a:not(.btn) { display: none; }
  .page-hero h1 { font-size: 28px; }
  .page-hero p { font-size: 15.5px; }
  .calc-inputs, .calc-results { padding: 20px 16px; }
  .big .value { font-size: 26px; }
}