:root{--primary:#6366f1;--primary-dark:#4f46e5;--bg:#0f172a;--card:#1e2937;--card-hover:#334155;--text:#e2e8f0;--text-light:#94a3b8;--border:#475569}*{margin:0;padding:0;box-sizing:border-box;outline:0;text-decoration:none}body{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:var(--bg);color:var(--text);line-height:2}#app{min-height:100vh}.container{max-width:1280px;margin:0 auto;padding:0 20px}.btn{padding:10px 20px;border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.flex-center-center{display:flex;place-items:center;justify-content:center}.flex-row{display:flex;flex-direction:row}.flex-column{display:flex;flex-direction:column}.full-width-height{width:100%;height:100%}