/* Donation Platform Fee Calculator — single stylesheet, mobile-first, no framework */

:root {
  --bg: #f7f9fa;
  --surface: #ffffff;
  --ink: #15252b;
  --ink-soft: #4a5e66;
  --ink-faint: #66767d;
  --accent: #0f766e;
  --accent-dark: #0b5d57;
  --accent-soft: #e6f4f2;
  --warn-soft: #fdf3e3;
  --warn-ink: #8a5a12;
  --line: #dfe7ea;
  --best: #f0faf4;
  --best-line: #b9e3c9;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(21, 37, 43, 0.06), 0 4px 16px rgba(21, 37, 43, 0.05);
  --max: 60rem;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

img, svg { max-width: 100%; }

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

code { background: var(--accent-soft); padding: 0.1em 0.35em; border-radius: 5px; font-size: 0.9em; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1rem; }

/* ----------------------------- header ----------------------------- */

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1.25rem;
  padding-top: 0.85rem; padding-bottom: 0.85rem;
}
.brand {
  font-weight: 700; font-size: 1.05rem; color: var(--ink); text-decoration: none;
  display: inline-flex; align-items: center; gap: 0.5rem;
}
.brand .mark {
  width: 1.6rem; height: 1.6rem; border-radius: 8px; background: var(--accent);
  color: #fff; display: inline-flex; align-items: center; justify-content: center;
  font-size: 0.95rem; font-weight: 800;
}
.site-nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; font-size: 0.92rem; }
.site-nav a { color: var(--ink-soft); text-decoration: none; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--accent-dark); }

/* ------------------------------ hero ------------------------------ */

.hero { padding: 2.2rem 0 1rem; }
.hero h1 { font-size: 1.7rem; line-height: 1.25; margin: 0 0 0.6rem; letter-spacing: -0.01em; }
.hero .lede { color: var(--ink-soft); margin: 0; max-width: 46rem; }
.hero .lede strong { color: var(--ink); }

.neutral-strip {
  margin-top: 0.9rem; font-size: 0.85rem; color: var(--ink-faint);
  display: flex; flex-wrap: wrap; gap: 0.35rem 1.1rem;
}
.neutral-strip span::before { content: "✓ "; color: var(--accent); }

/* --------------------------- calculator --------------------------- */

.calc {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 1.1rem; margin: 1.4rem 0 2rem;
}

.calc-inputs {
  display: grid; gap: 1rem; grid-template-columns: 1fr;
  padding-bottom: 1.1rem; border-bottom: 1px solid var(--line); margin-bottom: 1.1rem;
}
.field label { display: block; font-weight: 600; font-size: 0.92rem; margin-bottom: 0.35rem; }
.field .out { float: right; font-weight: 500; color: var(--accent-dark); font-size: 0.88rem; }
.field .hint { margin: 0.35rem 0 0; font-size: 0.8rem; color: var(--ink-faint); line-height: 1.45; }

.money-wrap { position: relative; }
.money-wrap span {
  position: absolute; left: 0.75rem; top: 50%; transform: translateY(-50%);
  color: var(--ink-faint); font-weight: 600;
}
.money-wrap input {
  width: 100%; padding: 0.7rem 0.75rem 0.7rem 1.7rem;
  min-height: 44px;
  border: 1px solid var(--line); border-radius: 8px; font: inherit; font-weight: 600;
  color: var(--ink); background: #fff;
}
.money-wrap input:focus, input[type="range"]:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent);
}

input[type="range"] { width: 100%; accent-color: var(--accent); margin: 0.4rem 0 0; }

/* ----------------------------- focus-visible ---------------------- */

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ----------------------------- neutrality badge ------------------- */

.neutral-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 700;
  border-radius: 999px;
  padding: 4px 12px;
  white-space: nowrap;
}
.neutral-badge::before { content: "✓ "; }

.table-header-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}
.table-header-row h2 { margin: 0; }

/* fees-as-of stamp inside result rows */
.result-source {
  font-size: 0.77rem;
  color: var(--ink-faint);
  margin: 0.4rem 0 0;
}
.result-source a { color: var(--ink-faint); }
.result-source a:hover { color: var(--accent-dark); }

/* ----------------------------- results ---------------------------- */

.calc-summary { margin: 0 0 1rem; font-size: 0.95rem; color: var(--ink-soft); }
.calc-msg { margin: 0; color: var(--warn-ink); background: var(--warn-soft); padding: 0.75rem 1rem; border-radius: 8px; }

.result-row {
  border: 1px solid var(--line); border-radius: 10px; padding: 0.9rem 1rem;
  margin-bottom: 0.8rem; background: var(--surface);
}
.result-row.is-best { background: var(--best); border-color: var(--best-line); }

.result-head { display: flex; align-items: baseline; gap: 0.6rem; flex-wrap: wrap; }
.rank {
  font-weight: 800; color: var(--accent-dark); font-size: 0.9rem;
  background: var(--accent-soft); border-radius: 6px; padding: 0.1rem 0.45rem;
}
.result-name { margin: 0; font-size: 1.05rem; flex: 1 1 auto; }
.result-name .sublabel { font-weight: 500; color: var(--ink-faint); font-size: 0.85rem; }
.visit {
  font-size: 0.88rem; font-weight: 600; text-decoration: none;
  color: var(--accent-dark); white-space: nowrap;
}
.visit:hover { text-decoration: underline; }

.result-kept { margin: 0.55rem 0 0.45rem; }
.kept-num { font-size: 0.95rem; }
.kept-num strong { font-size: 1.25rem; letter-spacing: -0.01em; }
.bar { height: 8px; background: #e8eef0; border-radius: 99px; margin-top: 0.4rem; overflow: hidden; }
.bar-fill { height: 100%; background: linear-gradient(90deg, var(--accent), #14b8a6); border-radius: 99px; }

.result-meta { display: flex; flex-wrap: wrap; gap: 0.2rem 1.2rem; font-size: 0.88rem; color: var(--ink-soft); }
.result-meta .annual strong { color: var(--ink); }

.badges { margin-top: 0.5rem; display: flex; flex-wrap: wrap; gap: 0.35rem; }
.badge {
  font-size: 0.74rem; font-weight: 600; color: var(--accent-dark);
  background: var(--accent-soft); border-radius: 99px; padding: 0.15rem 0.6rem;
}
.badge-warn { color: var(--warn-ink); background: var(--warn-soft); }

.result-note { margin: 0.55rem 0 0; font-size: 0.84rem; color: var(--ink-faint); line-height: 1.5; }

.calc-foot { font-size: 0.78rem; color: var(--ink-faint); margin: 1rem 0 0; line-height: 1.55; }

/* --------------------------- content pages ------------------------ */

main { padding-bottom: 2.5rem; }
.content { max-width: 46rem; }
.content h2 { font-size: 1.32rem; margin: 2.2rem 0 0.6rem; letter-spacing: -0.01em; }
.content h3 { font-size: 1.05rem; margin: 1.5rem 0 0.4rem; }
.content p, .content li { color: var(--ink-soft); }
.content p strong, .content li strong { color: var(--ink); }
.answer-box {
  background: var(--accent-soft); border-left: 4px solid var(--accent);
  border-radius: 0 10px 10px 0; padding: 0.9rem 1.1rem; margin: 1.2rem 0;
}
.answer-box p { margin: 0; color: var(--ink); font-size: 1.02rem; }

.fee-table-wrap { overflow-x: auto; margin: 1rem 0; }
table.fee-table {
  border-collapse: collapse; width: 100%; font-size: 0.9rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px; overflow: hidden;
}
.fee-table caption { caption-side: bottom; font-size: 0.78rem; color: var(--ink-faint); padding: 0.5rem 0; text-align: left; }
.fee-table th, .fee-table td { padding: 0.55rem 0.75rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.fee-table thead th { background: #f0f4f5; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--ink-soft); }
.fee-table tbody tr:last-child td { border-bottom: none; }
.fee-table td.num, .fee-table th.num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }

.verdict {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 1rem 1.2rem; margin: 1.3rem 0;
}
.verdict h2, .verdict h3 { margin-top: 0.2rem; }

/* ------------------------------- FAQ ------------------------------- */

.faq details {
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px;
  padding: 0.8rem 1rem; margin-bottom: 0.6rem;
}
.faq summary { font-weight: 600; cursor: pointer; }
.faq details p { margin: 0.6rem 0 0; color: var(--ink-soft); }

/* ------------------------------ footer ----------------------------- */

.site-footer {
  border-top: 1px solid var(--line); margin-top: 2rem; background: var(--surface);
  font-size: 0.82rem; color: var(--ink-faint);
}
.site-footer .wrap { padding-top: 1.3rem; padding-bottom: 1.6rem; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 0.3rem 1.1rem; margin-bottom: 0.7rem; }
.site-footer a { color: var(--ink-soft); }
.site-footer p { margin: 0.3rem 0; line-height: 1.55; }

/* ------------------------------ misc ------------------------------- */

.center-page { text-align: center; padding: 4rem 1rem; }
.center-page h1 { font-size: 2rem; }

.skip-link {
  position: absolute; left: -9999px; top: 0; background: var(--accent); color: #fff;
  padding: 0.5rem 1rem; border-radius: 0 0 8px 0; z-index: 10;
}
.skip-link:focus { left: 0; }

/* ----------------------------- desktop ----------------------------- */

@media (min-width: 760px) {
  .hero h1 { font-size: 2.15rem; }
  .calc { padding: 1.5rem; }
  .calc-inputs { grid-template-columns: repeat(2, 1fr); gap: 1.1rem 1.5rem; }
  .calc-inputs .field:first-child { grid-column: 1; }
}

@media (prefers-reduced-motion: no-preference) {
  .bar-fill { transition: width 0.25s ease; }
}