:root {
  --sand-0: #fcfcf9;
  --sand-25: #f7f6f2;
  --sand-50: #efede7;
  --slate-100: #ddd9cf;
  --slate-200: #c7c1b3;
  --slate-300: #a8a08f;
  --slate-400: #7f786b;
  --slate-500: #60594f;
  --slate-600: #454039;
  --slate-700: #2f2b26;
  --slate-800: #1d1b18;
  --blue-500: #315cff;
  --blue-600: #2649cf;
  --green-500: #16835f;
  --green-50: #edf8f3;
  --amber-500: #a96b14;
  --amber-50: #fbf4e8;
  --white: #ffffff;
  --color-bg: var(--sand-0);
  --color-bg-subtle: var(--sand-25);
  --color-surface: var(--white);
  --color-surface-muted: #f8f7f4;
  --color-surface-strong: var(--slate-800);
  --color-text: var(--slate-800);
  --color-text-soft: var(--slate-500);
  --color-text-muted: var(--slate-400);
  --color-text-inverse: var(--white);
  --color-border: rgba(29, 27, 24, 0.10);
  --color-border-strong: rgba(29, 27, 24, 0.18);
  --color-divider: rgba(29, 27, 24, 0.08);
  --color-brand: var(--blue-500);
  --color-brand-hover: var(--blue-600);
  --color-success: var(--green-500);
  --color-success-bg: var(--green-50);
  --color-warning: var(--amber-500);
  --color-warning-bg: var(--amber-50);
  --font-sans: "Inter", system-ui, sans-serif;
  --font-serif: "Instrument Serif", Georgia, serif;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-md: 1.125rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 2rem;
  --text-3xl: 2.75rem;
  --text-4xl: 4rem;
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --leading-tight: 1.08;
  --leading-snug: 1.25;
  --leading-normal: 1.55;
  --leading-relaxed: 1.7;
  --tracking-tight: -0.03em;
  --tracking-soft: -0.015em;
  --space-1: .25rem;
  --space-2: .5rem;
  --space-3: .75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(17,17,17,0.04);
  --shadow-md: 0 10px 30px rgba(17,17,17,0.06);
  --shadow-lg: 0 24px 60px rgba(17,17,17,0.08);
  --shadow-focus: 0 0 0 4px rgba(49,92,255,0.14);
  --duration-fast: 140ms;
  --duration-base: 180ms;
  --ease-standard: cubic-bezier(0.2, 0.8, 0.2, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: linear-gradient(180deg, #fcfcf9 0%, #f7f6f2 100%);
  color: var(--color-text);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
button, input, select { font: inherit; }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.narrow { width: min(860px, calc(100% - 32px)); margin: 0 auto; }
.section { padding: var(--space-20) 0; }
.section-alt { background: rgba(255,255,255,0.45); }
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(252,252,249,.78);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
}

.nav {
  min-height: 72px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}

.brand {
  display: flex;
  align-items: center;
  gap: .15rem;
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-soft);
  font-size: 1.08rem;
}

.brand span { color: var(--color-brand); }

nav {
  display: flex;
  gap: 1.15rem;
  flex-wrap: wrap;
  color: var(--color-text-soft);
  font-size: var(--text-sm);
}

nav a:hover { color: var(--color-text); }

.hero { padding: var(--space-20) 0 var(--space-12); }
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: var(--space-8);
  align-items: center;
}

.eyebrow, .section-tag, .tiny-label {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  color: var(--color-text-soft);
  font-size: var(--text-sm);
  letter-spacing: .02em;
  font-weight: var(--weight-medium);
}

.eyebrow, .section-tag {
  margin-bottom: 1rem;
  padding: .45rem .75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,.6);
}

h1, h2, h3, h4, p { margin-top: 0; }

h1 {
  margin: 1rem 0;
  font-size: clamp(2.5rem, 6vw, 5rem);
  line-height: .96;
  letter-spacing: -.05em;
  max-width: 12ch;
}

h1 .serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
}

h2 {
  font-size: clamp(2rem, 3.8vw, 3.4rem);
  line-height: 1.02;
  letter-spacing: -.035em;
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.2rem;
  line-height: var(--leading-snug);
  letter-spacing: -.02em;
  margin-bottom: .75rem;
}

p, li, summary, label, input, button, select {
  font-size: var(--text-base);
  line-height: var(--leading-normal);
}

.hero-copy, .section-copy, .hero-note, .card p, .assumptions li, .footer-content p, details p {
  color: var(--color-text-soft);
}

.hero-actions {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  margin: 1.75rem 0 1.25rem;
}

.hero-note {
  max-width: 720px;
  padding: 1rem 1.1rem;
  border-radius: 18px;
  background: rgba(255,255,255,.62);
  border: 1px solid var(--color-border);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  min-height: 48px;
  padding: .85rem 1.15rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: transform var(--duration-fast) var(--ease-standard), background var(--duration-base), border-color var(--duration-base), color var(--duration-base), box-shadow var(--duration-base);
  cursor: pointer;
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-soft);
}

.button:hover { transform: translateY(-1px); }
.button:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.button.primary {
  background: var(--color-brand);
  color: var(--color-text-inverse);
  box-shadow: 0 14px 28px rgba(49,92,255,.16);
}

.button.primary:hover { background: var(--color-brand-hover); }
.button.ghost {
  background: transparent;
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

.hero-panel,
.form-card,
.results,
.step,
.three-up .card,
.cta,
details.card {
  padding: 1.5rem;
}

.bullet-list {
  padding-left: 1.1rem;
  color: var(--color-text-soft);
}

.metric-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .9rem;
  margin-top: 1.5rem;
}

.metric-row div,
.result-grid div,
.scenario,
.form-intro,
.results-highlight {
  padding: 1rem;
  border-radius: 16px;
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-divider);
}

.metric-label {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-soft);
  margin-bottom: .25rem;
}

.three-up, .steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.step span {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  background: #eef2ff;
  color: var(--color-brand);
  font-weight: 800;
  margin-bottom: 1rem;
}

.calculator-layout {
  display: grid;
  grid-template-columns: .92fr 1.08fr;
  gap: 1.25rem;
  align-items: start;
}

.form-card {
  display: grid;
  gap: 1rem;
}

.form-intro,
.results-highlight {
  display: grid;
  gap: .35rem;
}

label {
  display: grid;
  gap: .5rem;
  font-weight: var(--weight-semibold);
}

input,
select {
  width: 100%;
  min-height: 52px;
  border-radius: 14px;
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface);
  color: var(--color-text);
  padding: 0 .9rem;
}

input::placeholder { color: var(--color-text-muted); }

.results-header, .cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: .4rem .75rem;
  border-radius: 999px;
  background: var(--color-success-bg);
  border: 1px solid rgba(22,131,95,.12);
  color: var(--color-success);
  font-size: var(--text-sm);
  font-weight: 700;
}

.pill.subtle {
  background: rgba(255,255,255,.72);
  border-color: var(--color-border);
  color: var(--color-text-soft);
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .9rem;
  margin: 1.25rem 0;
}

.result-grid span {
  display: block;
  color: var(--color-text-soft);
  font-size: .92rem;
  line-height: 1.45;
  margin-bottom: .35rem;
}

.result-grid strong {
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  letter-spacing: -.02em;
}

.assumptions {
  padding-top: 1.1rem;
  border-top: 1px solid var(--color-divider);
}

.assumptions ul { padding-left: 1.1rem; }

.faq-list {
  display: grid;
  gap: 1rem;
}

details summary {
  cursor: pointer;
  font-weight: var(--weight-semibold);
  list-style: none;
}

details summary::-webkit-details-marker { display: none; }
details p { margin: .7rem 0 0; }

.cta-section { padding-top: 1.5rem; }
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding: 1.75rem 0 2.75rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--color-text-soft);
}

@media (max-width: 980px) {
  .hero-grid,
  .calculator-layout,
  .three-up,
  .steps,
  .result-grid,
  .metric-row {
    grid-template-columns: 1fr;
  }

  .nav,
  .results-header,
  .cta {
    align-items: flex-start;
    flex-direction: column;
  }

  h1 { max-width: none; }
}

@media (max-width: 640px) {
  .section { padding: 4.5rem 0; }
  .hero { padding-top: 3.5rem; }
  nav { gap: .75rem; }
  .button { width: 100%; }
  .container, .narrow { width: min(100% - 24px, 1120px); }
}