:root {
  --ink: #172033;
  --muted: #607087;
  --line: #dfe6ef;
  --paper: #fffaf1;
  --card: rgba(255,255,255,.82);
  --green: #18775a;
  --green-2: #25a979;
  --amber: #f3a333;
  --blue: #2e6fbb;
  --shadow: 0 22px 70px rgba(43, 65, 93, .14);
  --radius: 28px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Trebuchet MS", "Gill Sans", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 0%, rgba(37,169,121,.24), transparent 32rem),
    radial-gradient(circle at 92% 8%, rgba(243,163,51,.22), transparent 30rem),
    linear-gradient(135deg, #fffaf1 0%, #eef7f0 54%, #f6efe2 100%);
  line-height: 1.6;
}
a { color: var(--green); text-decoration-thickness: 2px; text-underline-offset: 3px; }
img, svg { max-width: 100%; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(255,250,241,.82);
  border-bottom: 1px solid rgba(23,32,51,.08);
}
.nav {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  letter-spacing: -.02em;
}
.brand h2 { margin: 0; font-size: 20px; letter-spacing: -.02em; }
.brand a { color: var(--ink); text-decoration: none; }
.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: white;
  background: linear-gradient(135deg, var(--green), var(--amber));
  box-shadow: 0 12px 24px rgba(24,119,90,.25);
}
.nav-links { display: flex; gap: 18px; align-items: center; font-family: Verdana, sans-serif; font-size: 14px; }
.nav-links a { color: var(--muted); text-decoration: none; }
.wrap { width: min(1160px, calc(100% - 32px)); margin: 0 auto; }
.hero { padding: 64px 0 34px; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid rgba(24,119,90,.22);
  border-radius: 999px;
  background: rgba(255,255,255,.66);
  font-family: Verdana, sans-serif;
  font-size: 13px;
  color: var(--green);
}
h1, h2, h3 { line-height: 1.06; margin: 0; letter-spacing: -.045em; }
h1 { margin-top: 18px; font-size: clamp(46px, 7vw, 86px); max-width: 900px; }
h2 { font-size: clamp(30px, 4vw, 48px); margin-bottom: 18px; }
h3 { font-size: 25px; margin-bottom: 10px; }
p { margin: 0 0 16px; }
.lede { max-width: 760px; margin-top: 20px; font-size: 21px; color: var(--muted); }
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  align-items: stretch;
  margin-top: 34px;
  padding: 14px;
  border: 1px solid rgba(23,32,51,.1);
  border-radius: 34px;
  background: rgba(255,255,255,.5);
  box-shadow: var(--shadow);
}
.hero-grid::before {
  content: "";
  position: absolute;
  left: calc(50% - 25px);
  top: 76px;
  width: 50px;
  height: 2px;
  z-index: 4;
  background: linear-gradient(90deg, var(--green), var(--amber));
}
.panel {
  border: 1px solid rgba(23,32,51,.1);
  border-radius: var(--radius);
  background: var(--card);
  overflow: hidden;
  height: 100%;
}
.calculator {
  position: relative;
  padding: 34px 30px 34px;
  border-radius: 26px;
  box-shadow: none;
}
.step-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  padding: 7px 11px;
  border-radius: 999px;
  background: #e6f3ec;
  color: var(--green);
  font: 800 12px Verdana, sans-serif;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.result-card .step-label {
  background: rgba(255,255,255,.16);
  color: white;
  border: 1px solid rgba(255,255,255,.18);
}
.step-label .num {
  display: inline-grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 999px;
  color: white;
  background: var(--green);
}
.result-card .step-label .num { background: var(--amber); color: var(--ink); }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; }
.field { display: grid; gap: 7px; font-family: Verdana, sans-serif; font-size: 13px; color: var(--muted); }
.field.full { grid-column: 1 / -1; }
input, select {
  width: 100%;
  border: 1px solid rgba(23,32,51,.16);
  border-radius: 16px;
  padding: 14px 14px;
  background: rgba(255,255,255,.86);
  color: var(--ink);
  font: 16px Verdana, sans-serif;
  outline: none;
}
input:focus, select:focus { border-color: var(--green-2); box-shadow: 0 0 0 4px rgba(37,169,121,.14); }
.unit-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.quick { display: flex; flex-wrap: wrap; gap: 9px; margin: 16px 0 6px; }
.quick button, .btn {
  border: 0;
  border-radius: 999px;
  padding: 10px 14px;
  background: #e6f3ec;
  color: var(--green);
  font: 700 13px Verdana, sans-serif;
  cursor: pointer;
}
.btn.primary { background: linear-gradient(135deg, var(--green), var(--green-2)); color: white; padding: 14px 18px; box-shadow: 0 14px 28px rgba(24,119,90,.22); }
.advanced-toggle { margin-top: 14px; display: inline-flex; }
.advanced { display: none; margin-top: 14px; }
.advanced.open { display: grid; }
.result-card {
  min-height: 100%;
  padding: 34px 30px;
  border-radius: 26px;
  box-shadow: none;
  color: white;
  background:
    linear-gradient(160deg, rgba(23,32,51,.94), rgba(24,119,90,.92)),
    radial-gradient(circle at 90% 20%, rgba(243,163,51,.5), transparent 18rem);
}
.result-label { font: 700 13px Verdana, sans-serif; letter-spacing: .08em; text-transform: uppercase; color: rgba(255,255,255,.7); margin-top: 4px; }
.result-main { margin: 10px 0 8px; font-size: clamp(54px, 7vw, 86px); line-height: .95; letter-spacing: -.07em; }
.result-main span { font-size: .36em; letter-spacing: -.04em; }
.result-sub { color: rgba(255,255,255,.78); font-size: 18px; }
.metrics { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; margin-top: 24px; }
.metric { padding: 16px; border-radius: 20px; background: rgba(255,255,255,.11); border: 1px solid rgba(255,255,255,.14); }
.metric b { display: block; font-size: 24px; line-height: 1.1; }
.metric span { color: rgba(255,255,255,.7); font: 12px Verdana, sans-serif; }
.copy-row { display: flex; gap: 10px; margin-top: 20px; flex-wrap: wrap; }
.copy-row .btn { background: rgba(255,255,255,.16); color: white; }
.section { padding: 48px 0; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
.card { padding: 24px; border-radius: 24px; background: rgba(255,255,255,.72); border: 1px solid rgba(23,32,51,.09); box-shadow: 0 12px 36px rgba(43,65,93,.08); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-family: Verdana, sans-serif; font-size: 14px; }
th, td { padding: 13px 12px; text-align: left; border-bottom: 1px solid rgba(23,32,51,.1); }
th { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .05em; }
.link-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 12px; }
.link-card { padding: 16px; border-radius: 18px; background: rgba(255,255,255,.68); border: 1px solid rgba(23,32,51,.08); text-decoration: none; color: var(--ink); }
.link-card b { display: block; font-size: 18px; }
.link-card span { color: var(--muted); font-family: Verdana, sans-serif; font-size: 13px; }
.faq details { padding: 18px 0; border-bottom: 1px solid rgba(23,32,51,.11); }
.faq summary { cursor: pointer; font-weight: 800; font-size: 19px; }
.note { color: var(--muted); font-size: 15px; }
.footer { padding: 36px 0 54px; color: var(--muted); font-family: Verdana, sans-serif; font-size: 13px; }
.breadcrumb { margin-bottom: 18px; color: var(--muted); font-family: Verdana, sans-serif; font-size: 13px; }
.ad-slot {
  display: grid;
  place-items: center;
  min-height: 92px;
  margin: 22px 0;
  border: 1px dashed rgba(23,32,51,.22);
  border-radius: 20px;
  background: rgba(255,255,255,.45);
  color: var(--muted);
  font: 700 12px Verdana, sans-serif;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.ad-middle { margin-top: 14px; }
@media (max-width: 860px) {
  .nav { align-items: flex-start; padding: 14px 0; flex-direction: column; }
  .nav-links { flex-wrap: wrap; }
  .hero { padding-top: 38px; }
  .hero-grid, .grid-2 { grid-template-columns: 1fr; }
  .hero-grid { gap: 12px; padding: 8px; }
  .hero-grid::before { display: none; }
  .calculator, .result-card { border-radius: 24px; border: 1px solid rgba(23,32,51,.1); }
  .form-grid, .metrics { grid-template-columns: 1fr; }
  .link-grid { grid-template-columns: 1fr; }
  .result-main { font-size: 58px; }
}