:root {
  --green: #0f7a4d;
  --green-dark: #0a5c39;
  --ink: #16201c;
  --ink-soft: #4a5650;
  --bg: #fbfaf7;
  --card: #ffffff;
  --line: #e4e2da;
  --accent: #e8633c;
  --radius: 14px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
}

a { color: var(--green-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 20px;
}

header.site {
  border-bottom: 1px solid var(--line);
  background: var(--card);
}

header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}

.brand {
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.brand span { color: var(--green); }

nav.site a {
  margin-left: 18px;
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.92rem;
}
nav.site a:hover { color: var(--green-dark); }

.hero {
  padding: 48px 0 28px;
}
.hero h1 {
  font-size: 2.1rem;
  line-height: 1.18;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}
.hero p.lead {
  font-size: 1.1rem;
  color: var(--ink-soft);
  max-width: 640px;
  margin: 0 0 6px;
}
.pill {
  display: inline-block;
  background: #eaf6ee;
  color: var(--green-dark);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 5px 11px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.calc-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  margin: 22px 0 36px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
@media (max-width: 560px) {
  .field-row { grid-template-columns: 1fr; }
}

label {
  display: block;
  font-weight: 700;
  font-size: 0.88rem;
  margin-bottom: 6px;
  color: var(--ink);
}
label .hint {
  display: block;
  font-weight: 400;
  font-size: 0.8rem;
  color: var(--ink-soft);
  margin-top: 2px;
}

input[type="number"], select {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid #cfcabf;
  border-radius: 8px;
  font-size: 1rem;
  background: #fff;
  color: var(--ink);
}
input[type="number"]:focus, select:focus {
  outline: 2px solid var(--green);
  border-color: var(--green);
}

button.calc-btn {
  background: var(--green);
  color: #fff;
  border: none;
  font-weight: 700;
  font-size: 1rem;
  padding: 13px 22px;
  border-radius: 9px;
  cursor: pointer;
  width: 100%;
  margin-top: 6px;
}
button.calc-btn:hover { background: var(--green-dark); }

.results {
  display: none;
  margin-top: 24px;
  border-top: 2px dashed var(--line);
  padding-top: 22px;
}
.results.show { display: block; }

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 18px;
}
@media (max-width: 560px) {
  .result-grid { grid-template-columns: 1fr; }
}

.result-box {
  background: #f6f5f0;
  border-radius: 10px;
  padding: 16px;
}
.result-box .num {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--ink);
}
.result-box.highlight {
  background: #eaf6ee;
}
.result-box.highlight .num { color: var(--green-dark); }
.result-box .lbl {
  font-size: 0.82rem;
  color: var(--ink-soft);
  font-weight: 600;
  margin-top: 2px;
}

.quarters {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 8px;
}
@media (max-width: 560px) {
  .quarters { grid-template-columns: repeat(2, 1fr); }
}
.qbox {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 10px;
  text-align: center;
}
.qbox .amt { font-weight: 800; font-size: 1.05rem; }
.qbox .due { font-size: 0.74rem; color: var(--ink-soft); margin-top: 2px; }

.breakdown {
  margin-top: 18px;
  font-size: 0.92rem;
}
.breakdown table { width: 100%; border-collapse: collapse; }
.breakdown td { padding: 6px 0; border-bottom: 1px solid var(--line); }
.breakdown td:last-child { text-align: right; font-weight: 700; }

.note {
  font-size: 0.8rem;
  color: var(--ink-soft);
  margin-top: 14px;
}

section.content { padding: 8px 0 40px; }
section.content h2 { font-size: 1.4rem; margin-top: 34px; }
section.content h3 { font-size: 1.12rem; margin-top: 22px; }
section.content ul { padding-left: 22px; }
section.content li { margin-bottom: 7px; }

.cta-box {
  background: #fff7ef;
  border: 1px solid #f0ddc4;
  border-radius: var(--radius);
  padding: 18px 22px;
  margin: 26px 0;
}
.cta-box .tag {
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #b35b22;
}
.cta-box a.btn {
  display: inline-block;
  margin-top: 10px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  padding: 9px 16px;
  border-radius: 8px;
}
.cta-box a.btn:hover { text-decoration: none; opacity: 0.92; }

.platform-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 18px 0 30px;
}
@media (max-width: 700px) {
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
}
.platform-grid a {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  font-weight: 700;
  color: var(--ink);
  font-size: 0.92rem;
}
.platform-grid a:hover {
  border-color: var(--green);
  text-decoration: none;
  color: var(--green-dark);
}

footer.site {
  border-top: 1px solid var(--line);
  margin-top: 40px;
  padding: 28px 0 40px;
  color: var(--ink-soft);
  font-size: 0.85rem;
}
footer.site a { color: var(--ink-soft); margin-right: 14px; }

.disclaimer-strip {
  font-size: 0.78rem;
  color: var(--ink-soft);
  background: #f3f2ec;
  border-radius: 8px;
  padding: 10px 14px;
  margin-top: 16px;
}