/*
Theme Name: FinCalc
Theme URI: https://financial-calculator.ru/
Description: Lightweight theme for the compound interest investment calculator.
Author: Financial Calculator
Version: 1.0.0
Requires PHP: 7.4
Text Domain: fincalc
*/

:root {
  --paper: #f6f7f5;
  --card: #ffffff;
  --ink: #1b2431;
  --ink-2: #57606e;
  --muted: #8a9099;
  --line: #e3e6e1;
  --accent: #1c5cab;
  --accent-2: #2a78d6;
  --pos: #1baf7a;
  --pos-ink: #0e7a54;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent-2); }

img { max-width: 100%; height: auto; }

h1, h2, h3 { line-height: 1.25; text-wrap: balance; }
h1 { font-size: clamp(1.55rem, 4vw, 2.15rem); margin: 0 0 .35em; }
h2 { font-size: 1.35rem; margin: 1.8em 0 .6em; }
h3 { font-size: 1.1rem; margin: 1.4em 0 .5em; }

.wrap { max-width: 1020px; margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */

.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  padding-top: 14px;
  padding-bottom: 14px;
}
.site-logo {
  font-weight: 700;
  font-size: 1.06rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -.01em;
  white-space: nowrap;
}
.site-logo .mark {
  display: inline-block;
  width: 10px; height: 10px;
  margin-right: 8px;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--accent-2), var(--pos));
}
.site-nav { display: flex; gap: 4px 18px; flex-wrap: wrap; }
.site-nav a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: .95rem;
  padding: 4px 0;
}
.site-nav a:hover { color: var(--accent); }

.skip-link {
  position: absolute;
  left: -9999px;
  background: var(--card);
  padding: 8px 14px;
}
.skip-link:focus { left: 12px; top: 12px; z-index: 10; }

/* ---------- Page body ---------- */

.site-main { padding: 36px 0 56px; }
.page-intro { max-width: 72ch; color: var(--ink-2); margin: 0 0 26px; }

.entry-content { max-width: 72ch; }
.entry-content li { margin-bottom: .35em; }
.entry-content table { border-collapse: collapse; width: 100%; }
.entry-content th, .entry-content td {
  border: 1px solid var(--line);
  padding: 8px 12px;
  text-align: left;
}

/* ---------- Calculator ---------- */

.calc {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 26px 30px;
  margin-bottom: 40px;
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px 20px;
  margin-bottom: 26px;
}
@media (max-width: 760px) { .calc-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .calc-grid { grid-template-columns: 1fr; } }

.field label {
  display: block;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--ink-2);
  margin-bottom: 6px;
}
.field input, .field select {
  width: 100%;
  height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  color: var(--ink);
  font: inherit;
  font-variant-numeric: tabular-nums;
}
.field input:focus, .field select:focus {
  outline: 2px solid var(--accent-2);
  outline-offset: 1px;
  border-color: var(--accent-2);
}

.calc-results {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 14px;
  margin-bottom: 26px;
}
@media (max-width: 640px) { .calc-results { grid-template-columns: 1fr; } }

.stat {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 18px 16px;
}
.stat .label {
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--muted);
}
.stat .value {
  font-size: 1.45rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  margin-top: 2px;
  letter-spacing: -.01em;
}
.stat-hero { background: #f2f7fd; border-color: #cfe1f6; }
.stat-hero .value { font-size: 1.9rem; color: var(--accent); }
.stat-income .value { color: var(--pos-ink); }
.stat .sub { font-size: .85rem; color: var(--muted); margin-top: 2px; }

.calc-chart-block { margin-bottom: 8px; }
.chart-legend {
  display: flex;
  gap: 22px;
  font-size: .88rem;
  color: var(--ink-2);
  margin-bottom: 10px;
}
.chart-legend .chip { display: inline-flex; align-items: center; gap: 7px; }
.chart-legend .swatch { width: 14px; height: 4px; border-radius: 2px; display: inline-block; }

.chart-wrap { position: relative; }
#calc-chart { width: 100%; height: 320px; display: block; touch-action: pan-y; }
#chart-tip {
  position: absolute;
  pointer-events: none;
  background: var(--ink);
  color: #fff;
  border-radius: 8px;
  padding: 9px 12px;
  font-size: .82rem;
  line-height: 1.5;
  white-space: nowrap;
  display: none;
  z-index: 5;
}
#chart-tip .t-year { font-weight: 700; }
#chart-tip .t-row { display: flex; align-items: center; gap: 7px; }
#chart-tip .dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }

.calc-table-details { margin-top: 18px; }
.calc-table-details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--accent);
}
.calc-table-wrap { overflow-x: auto; margin-top: 12px; }
.calc-table { border-collapse: collapse; width: 100%; font-size: .92rem; }
.calc-table th, .calc-table td {
  padding: 8px 14px;
  border-bottom: 1px solid var(--line);
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.calc-table th:first-child, .calc-table td:first-child { text-align: left; }
.calc-table th {
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--muted);
  font-weight: 600;
}

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

.site-footer {
  background: var(--card);
  border-top: 1px solid var(--line);
  padding: 34px 0 30px;
  color: var(--ink-2);
  font-size: .92rem;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 700px) { .footer-cols { grid-template-columns: 1fr; } }
.footer-cols h2 {
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--muted);
  margin: 0 0 10px;
}
.footer-cols ul { list-style: none; margin: 0; padding: 0; }
.footer-cols li { margin-bottom: 7px; }
.footer-cols a { color: var(--ink-2); text-decoration: none; }
.footer-cols a:hover { color: var(--accent); }
.footer-bottom {
  margin-top: 26px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .85rem;
}