:root {
  --solar-green: #16a34a;
  --solar-green-soft: #e9f7ef;
  --ink-dark: #0f172a;
  --ink-muted: #475569;
}

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

body {
  margin: 0;
  font-family: "Inter", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink-dark);
  background: #ffffff;
}

.section {
  padding: 4rem 1.25rem;
}

.section-muted {
  background: #f7f8fa;
}

.section-lead {
  padding: 5rem 1.25rem;
  background: linear-gradient(
    180deg,
    var(--solar-green-soft) 0%,
    #ffffff 65%
  );
}

.section-break {
  text-align: center;
  font-size: 1.1rem;
  background: #ffffff;
}

.section-break::before {
  content: "";
  display: block;
  width: 60px;
  height: 4px;
  background: var(--solar-green);
  margin: 0 auto 1.5rem;
  border-radius: 2px;
}

.section-footer {
  background: var(--ink-dark);
  color: #ffffff;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

.eyebrow {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--solar-green);
  margin-bottom: 1rem;
  display: block;
}

h1 {
  font-size: 2.6rem;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h2 {
  font-size: 1.7rem;
  margin-bottom: 1.25rem;
}

h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.lead-text {
  max-width: 720px;
  font-size: 1.1rem;
  color: var(--ink-muted);
}

.grid-2,
.grid-3 {
  display: grid;
  gap: 1.75rem;
}

.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }

.context-card,
.step-card,
.range-box,
.pdf-card {
  background: #ffffff;
  border: 1px solid rgba(22, 163, 74, 0.15);
  padding: 1.75rem;
  border-radius: 12px;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.context-card:hover,
.step-card:hover,
.range-box:hover,
.pdf-card:hover {
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.07);
  transform: translateY(-2px);
}

.step {
  color: var(--solar-green);
  font-weight: 600;
  font-size: 0.85rem;
}

.trust-list {
  list-style: none;
  padding-left: 0;
}

.trust-list li {
  padding-left: 1.4em;
  position: relative;
  margin-bottom: 0.6em;
}

.trust-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--solar-green);
}

.note {
  font-size: 0.9rem;
  color: var(--ink-muted);
  max-width: 720px;
}

.section-footer .note {
  color: #e5e7eb;
}

.pdf-link a {
  font-weight: 500;
}

a {
  color: var(--solar-green);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 900px) {
  h1 { font-size: 3rem; }
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 420px) {
  .section { padding: 3rem 1.25rem; }
  .section-lead { padding: 4rem 1.25rem; }
}

.pdf-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.pdf-icon {
  font-size: 1.4rem;
  line-height: 1;
}