:root {
  --bg: #fdfcf9;
  --text: #1d1d1f;
  --muted: #5c5c66;
  --accent: #1f5e4a;
  --border: #e3e0d8;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #16161a; --text: #ececf0; --muted: #a0a0ab; --accent: #7fd1b0; --border: #2c2c33; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main, header, footer { max-width: 42rem; margin: 0 auto; padding: 0 1rem; }
header { padding-top: 2.5rem; text-align: center; }
header img { display: block; margin: 0 auto 1rem; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 .5rem; }
h2 { font-size: 1.3rem; margin: 2.5rem 0 .75rem; padding-bottom: .3rem; border-bottom: 1px solid var(--border); }
.tagline { color: var(--muted); margin: 0; }
a { color: var(--accent); }
ul { padding-left: 1.25rem; }
li { margin: .4rem 0; }
.muted { color: var(--muted); font-size: .9rem; }
footer { margin-top: 3rem; padding-bottom: 2rem; color: var(--muted); font-size: .9rem; border-top: 1px solid var(--border); padding-top: 1rem; }
img { max-width: 100%; height: auto; }

.contact { margin-top: 1rem; font-weight: 600; }
.principles { padding-left: 1.75rem; }
.principles li { margin: .55rem 0; padding-left: .25rem; }
.principles li::marker { color: var(--accent); font-weight: 700; }
.poster { margin: 0 0 1.5rem; }
.poster img { display: block; width: 100%; max-width: 28rem; margin: 0 auto; border-radius: 6px; box-shadow: 0 4px 18px rgba(0,0,0,.18); }
.calendar { position: relative; width: 100%; height: 32rem; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; background: #fff; }
.calendar iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }