:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --text-main: #1f2937;
  --text-muted: #6b7280;
  --accent: #0f766e;
  --accent-hover: #115e59;
  --accent-tint: #f0fdfa;
  --accent-border: #ccfbf1;
  --card-bg: #f8fafc;
  --border: #e2e8f0;
  --max-w: 880px;
}

*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background-color: #ffffff;
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

header.site-head {
  border-bottom: 1px solid var(--border);
  padding: 1rem;
}

header.site-head .wrap,
main,
footer.site-foot {
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

header.site-head .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

header.site-head .logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-main);
}

header.site-head nav a {
  margin-left: 1rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

header.site-head nav a:hover {
  color: var(--text-main);
}

main {
  padding-top: 2rem;
  padding-bottom: 3rem;
}

h1 {
  font-size: 2.25rem;
  line-height: 1.2;
  margin: 0 0 0.5rem;
}

h2 {
  font-size: 1.5rem;
  line-height: 1.3;
  margin: 2rem 0 1rem;
}

p.lede {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin: 0 0 1.5rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 2rem;
}

form.checker {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

form.checker label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

form.checker input,
form.checker select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  font-size: 1rem;
  font-family: inherit;
  border: 1px solid var(--border);
  border-radius: 6px;
  background-color: #ffffff;
  color: var(--text-main);
}

form.checker input:focus,
form.checker select:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

button.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  background-color: var(--accent);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

button.btn:hover {
  background-color: var(--accent-hover);
}

.result {
  display: none;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.result.visible {
  display: block;
}

.result .verdict {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 0 0 0.5rem;
}

.result .pct {
  font-size: 3rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin: 0.5rem 0 1.25rem;
}

table.data {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

table.data th,
table.data td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
}

table.data th {
  background-color: #f1f5f9;
  text-align: left;
  font-weight: 600;
}

table.data tbody tr:nth-child(even) {
  background-color: var(--card-bg);
}

.cta {
  background-color: var(--accent-tint);
  border: 1px solid var(--accent-border);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 2rem 0;
  text-align: center;
}

.cta button.btn {
  width: auto;
  margin-top: 1rem;
}

.price {
  font-size: 1.75rem;
  font-weight: 700;
}

.note {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin: 0.75rem 0 0;
}

footer.site-foot {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  padding-bottom: 2rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
}

@media (min-width: 640px) {
  button.btn,
  form.checker button.btn {
    width: auto;
    align-self: flex-start;
  }
}

/* --- s1acalc page structure --- */
.container { max-width: var(--max-w); margin: 0 auto; padding-left: 1rem; padding-right: 1rem; }
header.site-head .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.5rem 1rem; }
header.site-head { padding-left: 0; padding-right: 0; }
.non-us-notice { background: var(--accent-tint); border: 1px solid var(--accent-border); border-radius: 6px; padding: 0.5rem 0.85rem; font-size: 0.9rem; }
form#calc .field { margin-bottom: 1rem; }
form#calc label { display: block; font-size: 0.9rem; font-weight: 600; margin-bottom: 0.35rem; }
form#calc input[type="number"], form#calc input[type="text"], form#calc select { width: 100%; padding: 0.65rem 0.85rem; font-size: 1rem; font-family: inherit; border: 1px solid var(--border); border-radius: 6px; background: #fff; color: var(--text-main); }
form#calc input:focus, form#calc select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
form#calc .checkbox label, form#calc .radio-group label { display: flex; align-items: flex-start; gap: 0.5rem; font-weight: 400; cursor: pointer; }
form#calc .checkbox input, form#calc .radio-group input { margin-top: 0.25rem; width: auto; }
form#calc fieldset { border: none; padding: 0; margin: 0 0 1rem; }
form#calc legend, form#calc h3 { font-size: 1.05rem; font-weight: 700; margin: 1.25rem 0 0.75rem; }
form#calc details { border: 1px solid var(--border); border-radius: 8px; padding: 0.75rem 1rem; margin-bottom: 1rem; background: #fff; }
form#calc details summary { font-weight: 700; cursor: pointer; padding: 0.25rem 0; }
.hint, .note { font-size: 0.85rem; color: var(--text-muted); }
.warning { background: #fef3c7; border: 1px solid #f59e0b; border-radius: 6px; padding: 0.6rem 0.85rem; font-size: 0.9rem; margin: 0.75rem 0; }
#result { background: var(--card-bg); border: 1px solid var(--border); border-radius: 8px; padding: 1.5rem; margin-bottom: 2rem; }
.result-row { display: flex; justify-content: space-between; gap: 1rem; padding: 0.5rem 0; border-bottom: 1px solid var(--border); }
.result-row .value { font-weight: 700; white-space: nowrap; }
.result-row.total { border-bottom: none; font-size: 1.1rem; }
.result-row.total .value { color: var(--accent); }
#r-mfs { background: #fef3c7; border: 1px solid #f59e0b; border-radius: 6px; padding: 0.75rem 1rem; margin: 1rem 0; }
#r-saved { font-size: 1.05rem; font-weight: 600; }
.rules-stamp { font-size: 0.8rem; color: var(--text-muted); }
.aff-slot { border: 1px dashed var(--border); border-radius: 8px; padding: 1rem 1.25rem; margin: 2rem 0; font-size: 0.9rem; color: var(--text-muted); }
.disclaimer { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }
footer nav a { margin: 0 0.5rem; }