body,html {height:100%;margin:0;font-family:"Open Sans",sans-serif;background:#f9f9f9;color:#333}
.container{max-width:400px;margin:5% auto;background:#fff;padding:2rem;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1)}
h1{font-size:1.5rem;margin-bottom:1rem}
input{width:100%;padding:.75rem;margin-bottom:1rem;border:1px solid #ccc;border-radius:4px}
button{width:100%;padding:.75rem;background:#000;color:#fff;border:none;border-radius:4px;cursor:pointer}
button:hover{opacity:.9}
.hidden{display:none!important}
.overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(255,255,255,0.95);display:flex;align-items:center;justify-content:center;z-index:1000}
.overlay.hidden{display:none!important}
.warning-content{background:#fff;padding:1.5rem;border-radius:8px;text-align:center;box-shadow:0 2px 8px rgba(0,0,0,0.1)}
.warning-content button{margin-top:1rem;padding:.5rem 1rem}