* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); min-height: 100vh; color: #fff; line-height: 1.6; }
#app { max-width: 480px; margin: 0 auto; min-height: 100vh; background: rgba(0,0,0,0.15); display: flex; flex-direction: column; }
header { padding: 1.5rem 1rem; border-bottom: 1px solid rgba(255,255,255,0.2); }
h1 { font-size: 1.5rem; margin-bottom: 1rem; }
nav { display: flex; gap: 0.5rem; flex-wrap: wrap; }
nav a { color: #fff; text-decoration: none; padding: 0.4rem 0.8rem; background: rgba(255,255,255,0.15); border-radius: 6px; font-size: 0.9rem; transition: background 0.2s; }
nav a:hover, nav a.active { background: rgba(255,255,255,0.3); }
main { flex: 1; padding: 1.5rem 1rem; }
main h2 { margin-bottom: 1rem; font-size: 1.3rem; }
main p { margin-bottom: 0.8rem; }
main code { background: rgba(0,0,0,0.3); padding: 0.15rem 0.4rem; border-radius: 4px; font-size: 0.85rem; }
footer { padding: 1rem; border-top: 1px solid rgba(255,255,255,0.2); opacity: 0.8; font-size: 0.8rem; text-align: center; }
.box { background: rgba(255,255,255,0.1); padding: 1rem; border-radius: 8px; margin: 1rem 0; }
img { max-width: 100%; border-radius: 8px; }