*{box-sizing:border-box}
body{margin:0;font-family:Arial,sans-serif;background:#f3f5f9;color:#172033}
header{background:#121827;color:#fff;padding:16px 5%;display:flex;justify-content:space-between;align-items:center;gap:15px}
nav{display:flex;gap:14px;flex-wrap:wrap}
nav a{color:#fff;text-decoration:none}
.container{max-width:1100px;margin:28px auto;padding:0 16px}
.auth-wrap{max-width:460px;margin:40px auto;padding:16px}
.brand{text-align:center;font-size:30px;font-weight:800;margin-bottom:20px}
.brand span{color:#6c5ce7}
.brand small{display:block;font-size:12px;color:#777;margin-top:5px}
.card{background:#fff;border-radius:14px;padding:22px;margin-bottom:20px;box-shadow:0 4px 20px rgba(0,0,0,.07)}
label{display:block;margin:12px 0 6px;font-weight:600}
input,select{width:100%;padding:12px;border:1px solid #d8dce5;border-radius:8px;font-size:15px}
button{width:100%;padding:13px;margin-top:16px;border:0;border-radius:8px;background:#5d4de0;color:#fff;font-weight:700;cursor:pointer}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px}
.balance{font-size:20px;background:#fff;padding:18px;border-radius:12px;margin:18px 0}
.colors{display:flex;gap:8px}
.color-option{flex:1}
.color-option input{display:none}
.color-option span{display:block;padding:12px;text-align:center;border:1px solid #ddd;border-radius:8px}
.color-option input:checked+span{background:#eee;border:2px solid #555}
.notice{padding:12px;background:#fff4cf;border-radius:8px;margin:12px 0}
.error{padding:12px;background:#ffe1e1;color:#a00000;border-radius:8px;margin:12px 0}
.closed{padding:15px;background:#f1f1f1;border-radius:8px}
.muted{color:#697386;font-size:13px}
.admin-link{text-align:center}
.wa{display:inline-block;margin-top:14px;padding:12px 18px;background:#25d366;color:#fff;border-radius:8px;text-decoration:none}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse;min-width:700px}
th,td{padding:10px;border-bottom:1px solid #eee;text-align:left;font-size:14px}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin-bottom:20px}
.stats div{background:#fff;padding:20px;border-radius:12px}
.stats strong{display:block;font-size:28px;margin-top:8px}
.welcome{font-size:22px;font-weight:700}
@media(max-width:650px){
header{align-items:flex-start;flex-direction:column}
.stats{grid-template-columns:1fr}
.brand{font-size:25px}
}