:root {
  --green: #1f6f5b;
  --green-soft: #e4f1ec;
  --ink: #17201c;
  --muted: #5f6b66;
  --paper: #fbfaf7;
  --white: #ffffff;
  --line: #e2e5e1;
  --sidebar: 280px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
}

h1, h2, h3, .side-nav, .tag, .num, .stat strong, .brand, .legal, summary {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

a { color: var(--green); text-decoration: none; }

.page {
  display: grid;
  grid-template-columns: var(--sidebar) 1fr;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 2.5rem 2rem;
  background: var(--white);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.brand { display: flex; align-items: center; gap: 0.85rem; }
.brand strong { display: block; font-size: 1rem; }
.brand small { color: var(--muted); font-size: 0.8rem; }
.mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(145deg, var(--green), #3f9a80);
  flex-shrink: 0;
}

.side-nav { display: flex; flex-direction: column; gap: 0.25rem; }
.side-nav a {
  padding: 0.6rem 0.85rem;
  border-radius: 8px;
  color: var(--muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: background 0.15s, color 0.15s;
}
.side-nav a:hover, .side-nav a.active { background: var(--green-soft); color: var(--green); }

.side-note {
  margin-top: auto;
  font-size: 0.85rem;
  color: var(--muted);
  font-style: italic;
}

/* Content */
.content { padding: 4rem 5vw 4rem; max-width: 860px; }

.block { padding: 3rem 0; border-bottom: 1px solid var(--line); }
.block:last-child { border-bottom: none; }

.tag {
  display: inline-block;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  background: var(--green-soft);
  color: var(--green);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.25rem;
}

h1 {
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  line-height: 1.1;
  margin: 0 0 1.25rem;
  letter-spacing: -0.02em;
}
h2 {
  font-size: 1.6rem;
  margin: 0 0 1.75rem;
  color: var(--green);
}
h3 { font-size: 1.15rem; margin: 0 0 0.4rem; }

.lead { font-size: 1.25rem; color: var(--muted); }

.list { display: flex; flex-direction: column; gap: 2rem; }
.item { display: grid; grid-template-columns: 56px 1fr; gap: 1rem; }
.item p { margin: 0; color: var(--muted); }
.num {
  font-weight: 700;
  color: var(--green);
  font-size: 1rem;
  padding-top: 0.25rem;
  opacity: 0.7;
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}
.stat {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.5rem;
}
.stat strong { display: block; font-size: 2rem; color: var(--green); letter-spacing: -0.02em; }
.stat span { color: var(--muted); font-size: 0.95rem; }

details {
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
}
summary { cursor: pointer; font-weight: 600; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::before { content: "+"; display: inline-block; width: 1.5rem; color: var(--green); }
details[open] summary::before { content: "–"; }
details p { margin: 0.75rem 0 0 1.5rem; color: var(--muted); }

.footer {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
  color: var(--muted);
}
.footer p { margin: 0.5rem 0 0; }
.legal { display: flex; flex-direction: column; gap: 0.4rem; font-size: 0.9rem; }

@media (max-width: 860px) {
  .page { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; flex-direction: row; flex-wrap: wrap; align-items: center; gap: 1.5rem; padding: 1.5rem; }
  .side-nav { flex-direction: row; flex-wrap: wrap; }
  .side-note { display: none; }
  .content { padding: 2rem 1.5rem; }
}