:root{--bg: #0b1220;--surface: #0f172a;--surface-100: #111827;--border-200: #1f2937;--border-300: #334155;--text-900: #e5e7eb;--text-800: #d1d5db;--text-600: #94a3b8;--primary-200: #93c5fd;--primary-500: #3b82f6;--primary-600: #60a5fa}*{box-sizing:border-box}html,body{height:100%}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji";background:var(--bg);color:var(--text-900)}.container{max-width:1080px;margin:0 auto;padding:0 16px}.app-header{background:var(--surface);border-bottom:1px solid var(--border-300);position:sticky;top:0;z-index:10;color:var(--text-900)}.app-header .brand{display:flex;align-items:center;gap:8px;padding:12px 0;font-weight:700}.app-header .logo{font-size:18px}.app-main{padding:16px 0}