:root {
  --bg: #faf7f2;
  --ink: #111827;
  --muted: #374151;
  --eco: #00b489;
  --gold: #f2c94c;
  --forest: #003d29;
  --coral: #e85d4c;
  --coral-ring: #f3b7a8;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  min-height: 100dvh;
}

body {
  margin: 0;
  font-family: 'Plus Jakarta Sans', Inter, system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--eco);
}

.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  max-width: 1920px;
  margin: 0 auto;
  padding: 12px 12px 12px;
}

@media (min-width: 640px) {
  .bar { padding-left: 16px; padding-right: 16px; }
}
@media (min-width: 1280px) {
  .bar { padding-left: 24px; padding-right: 24px; }
}
@media (min-width: 1536px) {
  .bar { padding-left: 32px; padding-right: 32px; }
}

header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: #ffffff;
  padding-top: env(safe-area-inset-top);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  border-bottom: 1px solid #f0f0f0;
}

header nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 14px;
  font-size: 12px;
  font-weight: 600;
}

header nav a {
  color: var(--ink);
  text-decoration: none;
  opacity: 0.6;
  transition: opacity 0.15s, color 0.15s;
}

header nav a:hover,
header nav a.active {
  opacity: 1;
  color: var(--eco);
}

.brand {
  display: flex;
  align-items: center;
  color: var(--ink);
  text-decoration: none;
  flex-shrink: 0;
}

.brand img {
  display: block;
  height: 44px;
  width: auto;
}

@media (min-width: 640px) {
  .brand img { height: 52px; }
}

.shell {
  width: 100%;
  max-width: 1920px;
  margin: 0 auto;
  padding: 20px 12px 80px;
}

@media (min-width: 640px) {
  .shell { padding-left: 16px; padding-right: 16px; }
}
@media (min-width: 1280px) {
  .shell { padding-left: 24px; padding-right: 24px; }
}

main {
  max-width: 820px;
}

h1 {
  font-size: 28px;
  line-height: 1.2;
  margin: 0 0 12px;
  color: var(--ink);
  font-weight: 800;
}

h2 {
  font-size: 18px;
  margin: 28px 0 10px;
  color: var(--ink);
  font-weight: 700;
}

p, li {
  line-height: 1.6;
  font-size: 15px;
  color: var(--muted);
}

.hero p,
.lead {
  font-size: 16px;
  color: var(--ink);
}

.toc,
.summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin: 16px 0 8px;
  padding: 14px 16px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid #f0f0f0;
}

.summary {
  display: block;
}

.summary ol {
  margin: 8px 0 0;
}

.toc a,
.summary a {
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

h2[id] {
  scroll-margin-top: 84px;
}

.cta {
  display: inline-block;
  margin-top: 14px;
  background: var(--eco);
  color: #fff;
  text-decoration: none;
  padding: 12px 18px;
  border-radius: 12px;
  font-weight: 800;
  box-shadow: 0 2px 8px rgba(0, 180, 137, 0.25);
  transition: background 0.15s;
}

.cta:hover {
  background: #00956f;
  color: #fff;
}

.grid {
  display: grid;
  gap: 12px;
  margin: 22px 0;
}

@media (min-width: 640px) {
  .grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
}

.card {
  background: #ffffff;
  border-radius: 16px;
  padding: 16px;
  border: 1px solid #f0f0f0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.card strong {
  display: block;
  color: var(--ink);
  margin-bottom: 6px;
}

.note {
  font-size: 13px;
  color: #6b7280;
}

footer {
  background: #ffffff;
  border-top: 1px solid #f0f0f0;
}

.foot {
  display: grid;
  gap: 20px;
  width: 100%;
  max-width: 1920px;
  margin: 0 auto;
  padding: 32px 16px;
  font-size: 12px;
}

@media (min-width: 640px) {
  .foot {
    grid-template-columns: 1.4fr 1fr 1fr;
    padding-left: 16px;
    padding-right: 16px;
  }
}

@media (min-width: 1280px) {
  .foot { padding-left: 24px; padding-right: 24px; }
}

.tagline {
  margin: 8px 0 0;
  max-width: 280px;
  font-size: 12px;
  line-height: 1.5;
  color: #9ca3af;
}

.foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-content: flex-start;
}

.foot-links a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.15s;
}

.foot-links a:hover {
  color: var(--eco);
}

.rights {
  margin: 0;
  font-size: 11px;
  color: #9ca3af;
}

@media (min-width: 640px) {
  .rights { text-align: right; }
}

ol {
  padding-left: 18px;
}

code {
  font-size: 13px;
  background: #f3f4f6;
  padding: 1px 6px;
  border-radius: 6px;
}