:root { color-scheme: light; --ink:#172033; --accent:#3157a4; --paper:#f4f6fb; }
* { box-sizing: border-box; }
body { margin:0; min-height:100vh; font-family: Arial, Helvetica, sans-serif; color:var(--ink);
       background:linear-gradient(135deg,#edf2ff,#f8f9fc); display:grid; place-items:center; padding:24px; }
main { width:min(680px,100%); background:white; padding:clamp(24px,5vw,48px); border-radius:22px;
       box-shadow:0 16px 48px rgba(25,42,80,.12); }
h1 { margin:0 0 12px; font-size:clamp(1.8rem,5vw,2.5rem); }
p { line-height:1.6; color:#526078; }
.grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:12px; margin:28px 0; }
a.tile, .nav a { text-decoration:none; color:white; background:var(--accent); border-radius:12px;
                 padding:16px; text-align:center; font-weight:700; }
a.tile { font-size:1.2rem; }
a.tile:hover, .nav a:hover { background:#203f83; }
audio { display:block; width:100%; margin:24px 0; }
.nav { display:flex; flex-wrap:wrap; gap:10px; margin-top:24px; }
.nav a { padding:12px 16px; font-size:.95rem; }
.home { background:#e9eefb !important; color:var(--accent) !important; }
.note { font-size:.9rem; background:#f3f5fa; border-left:4px solid #9aaddb; padding:12px 14px; border-radius:8px; }
@media (max-width:420px) { .grid { grid-template-columns:repeat(2,minmax(0,1fr)); } }