:root{--bg: #0f172a;--card: #111827;--text: #e5e7eb;--accent: #60a5fa}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,"Apple Color Emoji","Segoe UI Emoji";background:var(--bg);color:var(--text)}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.app{min-height:100vh;display:flex;flex-direction:column}.navbar{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;border-bottom:1px solid #1f2937;position:sticky;top:0;background:var(--bg);z-index:10}.navbar__brand a{font-weight:700;color:var(--text)}.navbar__links a{margin:0 8px;padding:6px 8px;border-radius:6px}.navbar__links a.active{background:#1f2937}.container{width:100%;max-width:960px;padding:20px;margin:0 auto;flex:1}.card{background:var(--card);border:1px solid #1f2937;border-radius:12px;padding:16px;margin-bottom:16px}.footer{padding:16px 20px;border-top:1px solid #1f2937;text-align:center}