:root {
  --bg: #063429;
  --bg-2: #0c523f;
  --surface: #ffffff;
  --surface-soft: #f6faf8;
  --mint: #e9fbf3;
  --mint-2: #d8f7e9;
  --green: #079a6e;
  --green-dark: #056b50;
  --green-deep: #043b2f;
  --text: #10231d;
  --muted: #5f706a;
  --line: #dbe8e2;
  --danger: #d94d4d;
  --warning: #f5b63a;
  --shadow: 0 22px 60px rgba(0, 34, 25, .18);
  --radius: 20px;
  --radius-sm: 12px;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--surface);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; }
a { color: inherit; }
button, input, select { font: inherit; }
button { cursor: pointer; }
[hidden] { display: none !important; }

.skip-link {
  position: fixed;
  left: 12px;
  top: 12px;
  z-index: 999;
  padding: 10px 14px;
  border-radius: 8px;
  background: #fff;
  transform: translateY(-160%);
}
.skip-link:focus { transform: none; }

.container { width: min(calc(100% - 32px), var(--max)); margin-inline: auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(4,59,47,.08);
}
.header-inner { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; letter-spacing: -.02em; }
.brand-mark { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 9px; background: var(--green); color: #fff; }
.brand small { color: var(--green); font-weight: 700; margin-left: 4px; }
.primary-nav { display: flex; align-items: center; gap: 8px; }
.primary-nav a { text-decoration: none; color: #31473f; font-size: .94rem; font-weight: 650; padding: 9px 12px; border-radius: 999px; }
.primary-nav a:hover, .primary-nav a[aria-current="page"] { background: var(--mint); color: var(--green-dark); }
.nav-cta { border: 1px solid #f0cf78; background: #fff9e8; color: #74510a !important; }
.menu-button { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: #fff; border-radius: 10px; }

.hero {
  position: relative;
  overflow: hidden;
  padding: 54px 0 82px;
  color: #fff;
  background:
    radial-gradient(circle at 85% 10%, rgba(16,171,126,.24), transparent 28%),
    linear-gradient(135deg, var(--bg), var(--bg-2));
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 34%;
  background: linear-gradient(90deg, rgba(7,154,110,.12), rgba(255,255,255,.02));
  pointer-events: none;
}
.hero-copy { position: relative; z-index: 1; text-align: center; max-width: 820px; margin: 0 auto 30px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 7px 12px; border-radius: 999px; background: rgba(255,255,255,.09); border: 1px solid rgba(255,255,255,.12); font-size: .82rem; }
.hero h1 { margin: 15px 0 8px; font-size: clamp(2rem, 5vw, 3.45rem); line-height: 1.08; letter-spacing: -.045em; }
.hero-copy p { margin: 0 auto; color: #cbe5db; max-width: 760px; font-size: 1.04rem; }

.calculator-shell { position: relative; z-index: 2; background: var(--surface); color: var(--text); border-radius: 24px; box-shadow: var(--shadow); border: 1px solid rgba(255,255,255,.55); overflow: hidden; }
.calculator-tabs { display: flex; justify-content: center; gap: 6px; padding: 14px; background: #fbfdfc; border-bottom: 1px solid var(--line); }
.calculator-tab { min-width: 170px; border: 0; background: transparent; color: var(--muted); border-radius: 10px; padding: 11px 18px; font-weight: 750; }
.calculator-tab.is-active { background: #fff; color: var(--green-dark); box-shadow: 0 3px 15px rgba(6,52,41,.10); }
.calculator-panel { padding: clamp(20px, 4vw, 40px); }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px; }
.form-grid-three { grid-template-columns: repeat(3, minmax(0,1fr)); }
label { display: grid; gap: 7px; color: #273c34; font-weight: 700; font-size: .9rem; }
input, select { width: 100%; min-height: 48px; padding: 10px 13px; border: 1px solid #cfddd7; border-radius: 10px; color: var(--text); background: #fff; outline: none; }
input:focus, select:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(7,154,110,.12); }
.input-help { color: var(--muted); font-size: .77rem; font-weight: 500; }
.segmented { display: inline-flex; gap: 3px; padding: 4px; border-radius: 10px; background: #eef4f1; }
.segmented label { display: block; position: relative; }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented span { display: block; padding: 8px 16px; border-radius: 8px; font-size: .85rem; font-weight: 750; color: var(--muted); }
.segmented input:checked + span { background: #fff; color: var(--green-dark); box-shadow: 0 2px 8px rgba(6,52,41,.08); }
.frequency-row { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 18px; }

.result-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px; margin-top: 20px; }
.result-card { padding: 20px; border-radius: 14px; background: var(--mint); border: 1px solid #dbf5e9; }
.result-card h3 { margin: 0 0 15px; font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; color: var(--green-dark); }
.metric { margin-top: 10px; }
.metric span { display: block; color: var(--muted); font-size: .78rem; }
.metric strong { display: block; font-size: 1.23rem; letter-spacing: -.02em; }
.tax-red { color: var(--danger) !important; }
.saving-panel { margin-top: 16px; padding: 16px 18px; display: flex; justify-content: space-between; gap: 20px; align-items: center; border-radius: 13px; border: 1px solid #bfeedd; background: linear-gradient(90deg, #eafff6, #fbfffd); }
.saving-panel strong { color: var(--green-dark); }
.saving-panel small { color: var(--muted); display: block; }

.analytics { margin-top: 24px; }
.analytics-top { display: flex; justify-content: space-between; gap: 18px; align-items: center; flex-wrap: wrap; }
.rate-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.rate-pill { padding: 7px 10px; border-radius: 999px; background: #eff6f3; color: #52635d; font-size: .8rem; }
.rate-pill strong { color: var(--green-dark); }
.action-buttons { display: flex; gap: 8px; }
.button { border: 0; border-radius: 10px; min-height: 43px; padding: 10px 16px; font-weight: 800; background: var(--green); color: #fff; }
.button:hover { background: var(--green-dark); }
.button-secondary { background: #eef5f2; color: var(--green-dark); }
.button-secondary:hover { background: #dfeee8; }
.button-outline { background: #fff; color: var(--green-dark); border: 1px solid #a9dfcd; }
.chart-panel { display: grid; grid-template-columns: 1.05fr .95fr; gap: 24px; margin-top: 16px; padding: 20px; border-radius: 14px; background: #fafcfb; border: 1px solid #edf2ef; }
.donut-wrap { display: grid; place-items: center; min-height: 270px; }
.donut { --tax-share: 0%; width: 210px; aspect-ratio: 1; border-radius: 50%; background: conic-gradient(var(--danger) 0 var(--tax-share), var(--green) var(--tax-share) 100%); position: relative; }
.donut::after { content: ""; position: absolute; inset: 30%; border-radius: 50%; background: #fff; }
.donut-center { position: absolute; inset: 0; z-index: 1; display: grid; place-content: center; text-align: center; font-size: .76rem; color: var(--muted); }
.donut-center strong { font-size: 1.25rem; color: var(--text); }
.donut-legend { display: flex; justify-content: center; gap: 16px; font-size: .82rem; margin-top: 10px; }
.legend-dot { width: 9px; height: 9px; display: inline-block; border-radius: 50%; margin-right: 5px; }
.legend-green { background: var(--green); }
.legend-red { background: var(--danger); }
.slab-panel h3 { margin-top: 0; }
.slab-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.slab-row { display: flex; justify-content: space-between; gap: 16px; padding: 9px 11px; border-radius: 8px; color: var(--muted); font-size: .82rem; }
.slab-row.is-active { background: var(--mint); color: var(--green-dark); outline: 1px solid #c6ecdd; }

.info-strip { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 18px; }
.info-box { padding: 14px; border-radius: 11px; background: #eefaf5; border: 1px solid #d6f0e5; color: #386455; font-size: .84rem; }
.info-box.blue { background: #eef5ff; border-color: #dce8fb; color: #3d5e85; }
.period-list { display: grid; gap: 14px; }
.period-card { padding: 18px; border-radius: 12px; border: 1px solid var(--line); background: #fff; }
.period-heading { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.period-heading h3 { margin: 0; font-size: 1rem; }
.icon-button { border: 1px solid var(--line); background: #fff; width: 34px; height: 34px; border-radius: 50%; color: var(--muted); font-size: 1.2rem; }
.multi-actions { display: flex; justify-content: space-between; gap: 16px; margin: 16px 0; }
.error-box { padding: 12px 14px; background: #fff2f2; color: #9e3333; border: 1px solid #f0cccc; border-radius: 10px; }
.multi-results { border-radius: 13px; background: var(--mint); border: 1px solid #d8f3e7; overflow: hidden; }
.year-result { display: grid; grid-template-columns: 1.4fr repeat(3,1fr); gap: 12px; align-items: center; padding: 15px 18px; border-bottom: 1px solid #ccebdd; }
.year-result small, .year-result span { display: block; color: var(--muted); font-size: .75rem; }
.multi-total { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; padding: 16px 18px; }
.multi-total span { display: block; color: var(--muted); font-size: .75rem; }
.multi-chart { margin-top: 16px; padding: 18px; border: 1px solid #edf2ef; border-radius: 12px; background: #fafcfb; }
.bar-group + .bar-group { margin-top: 16px; }
.bar-label { display: block; font-weight: 800; font-size: .82rem; margin-bottom: 6px; }
.bar-track { height: 20px; background: #edf3f0; border-radius: 7px; overflow: hidden; margin-top: 5px; }
.bar { display: block; height: 100%; border-radius: 7px; min-width: 2px; }
.bar i { color: #fff; font-style: normal; font-size: .68rem; margin-left: 8px; line-height: 20px; }
.gross-bar { background: #3d82ed; }
.net-bar { background: var(--green); }
.empty-state { padding: 20px; color: var(--muted); }

.section { padding: 72px 0; }
.section-soft { background: #f7faf8; }
.section-green { background: linear-gradient(135deg, var(--bg), var(--bg-2)); color: #fff; }
.section-heading { max-width: 760px; margin: 0 auto 32px; text-align: center; }
.section-heading h2 { margin: 8px 0; font-size: clamp(1.7rem, 3vw, 2.5rem); letter-spacing: -.035em; }
.section-heading p { margin: 0; color: var(--muted); }
.section-green .section-heading p { color: #c7ded5; }
.feature-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.feature-card { padding: 22px; border-radius: 14px; background: #fff; border: 1px solid var(--line); box-shadow: 0 8px 28px rgba(6,52,41,.06); }
.feature-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 10px; background: var(--mint); color: var(--green); font-weight: 900; }
.feature-card h3 { margin: 15px 0 8px; }
.feature-card p { margin: 0; color: var(--muted); font-size: .9rem; }

.content-grid { display: grid; grid-template-columns: minmax(0,1.35fr) minmax(260px,.65fr); gap: 32px; align-items: start; }
.prose h2, .prose h3 { letter-spacing: -.02em; }
.prose p, .prose li { color: #42564f; }
.prose a { color: var(--green-dark); font-weight: 700; }
.prose table { width: 100%; border-collapse: collapse; margin: 22px 0; font-size: .9rem; }
.prose th, .prose td { padding: 12px; border: 1px solid var(--line); text-align: left; }
.prose th { background: var(--mint); }
.note { padding: 15px 17px; border-left: 4px solid var(--green); background: var(--mint); border-radius: 8px; }
.sidebar-card { position: sticky; top: 92px; padding: 20px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.sidebar-card h3 { margin-top: 0; }
.sidebar-card a { display: block; padding: 9px 0; text-decoration: none; color: var(--green-dark); border-bottom: 1px solid #edf2ef; }

.faq-list { max-width: 820px; margin: 0 auto; display: grid; gap: 10px; }
.faq-item { border-radius: 12px; background: #fff; color: var(--text); overflow: hidden; }
.faq-question { width: 100%; border: 0; background: transparent; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 17px 18px; text-align: left; font-weight: 800; }
.faq-question::after { content: "+"; color: var(--green); font-size: 1.2rem; }
.faq-question[aria-expanded="true"]::after { content: "−"; }
.faq-answer { padding: 0 18px 18px; color: var(--muted); }
.faq-answer p { margin: 0; }

.page-hero { padding: 62px 0; color: #fff; background: linear-gradient(135deg, var(--bg), var(--bg-2)); }
.page-hero .container { max-width: 900px; }
.page-hero h1 { margin: 8px 0; font-size: clamp(2rem,4vw,3.2rem); letter-spacing: -.04em; }
.page-hero p { color: #c8e0d7; max-width: 760px; }
.breadcrumbs { font-size: .82rem; color: #bfdbd0; }
.breadcrumbs a { text-decoration: none; }

.site-footer { background: #033126; color: #d1e5dc; padding: 54px 0 22px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr .7fr .7fr; gap: 38px; }
.footer-brand p { color: #9fc0b3; max-width: 460px; font-size: .88rem; }
.footer-col h3 { font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; color: #fff; }
.footer-col a { display: block; color: #a9c8bc; text-decoration: none; font-size: .85rem; margin: 9px 0; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid rgba(255,255,255,.08); margin-top: 38px; padding-top: 20px; color: #86aa9c; font-size: .8rem; }

@media (max-width: 860px) {
  .menu-button { display: inline-grid; place-items: center; }
  .primary-nav { display: none; position: absolute; inset: 68px 16px auto; padding: 12px; flex-direction: column; align-items: stretch; background: #fff; border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); }
  .primary-nav.is-open { display: flex; }
  .primary-nav a { text-align: center; }
  .chart-panel, .content-grid { grid-template-columns: 1fr; }
  .sidebar-card { position: static; }
  .feature-grid { grid-template-columns: 1fr; }
  .form-grid-three { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .container { width: min(calc(100% - 20px), var(--max)); }
  .hero { padding: 36px 0 52px; }
  .calculator-tabs { align-items: stretch; }
  .calculator-tab { min-width: 0; flex: 1; padding-inline: 8px; }
  .calculator-panel { padding: 17px; }
  .form-grid, .result-grid, .info-strip { grid-template-columns: 1fr; }
  .frequency-row { align-items: stretch; flex-direction: column; }
  .saving-panel, .analytics-top, .multi-actions { align-items: stretch; flex-direction: column; }
  .action-buttons { width: 100%; }
  .action-buttons .button { flex: 1; }
  .year-result { grid-template-columns: 1fr 1fr; }
  .year-result > div:first-child { grid-column: 1 / -1; }
  .multi-total { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .footer-bottom { flex-direction: column; }
  .donut { width: 180px; }
}

@media print {
  .site-header, .hero-copy, .section, .site-footer, .action-buttons, .calculator-tabs { display: none !important; }
  .hero { background: #fff; color: #000; padding: 0; }
  .calculator-shell { box-shadow: none; border: 0; }
  .calculator-panel { padding: 0; }
  body { background: #fff; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}