:root {
  color-scheme: light dark;
  --canvas: #f7f7f0;
  --text: #232e29;
  --accent: #225940;
  --panel: #e9f1e7;
  --border: #c3d1c5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #17221c;
    --text: #e8eee9;
    --accent: #a6dcb7;
    --panel: #24372c;
    --border: #4b6456;
  }
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--text);
  font: 1rem/1.75 system-ui, -apple-system, "PingFang SC", sans-serif;
}

main {
  width: min(42rem, calc(100% - 2.5rem));
  margin: 0 auto;
  padding: clamp(2rem, 7vw, 4.5rem) 0 2.5rem;
}

.app-name {
  color: var(--accent);
  font-weight: 700;
  margin: 0 0 0.5rem;
}

h1, h2, h3 {
  line-height: 1.35;
  margin: 0 0 0.6rem;
}

h1 { font-size: clamp(2rem, 7vw, 3rem); }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.05rem; margin-top: 1.25rem; }
p { margin: 0 0 0.75rem; }
section { margin-top: 1.75rem; }

.contact {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0.9rem;
  padding: 1.2rem;
}

.contact p { margin: 0.65rem 0 0; }

a {
  color: var(--accent);
  overflow-wrap: anywhere;
  text-underline-offset: 0.17em;
}

footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}