* { box-sizing: border-box; }
body {
    font-family: -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    background: #f4f5f7;
    color: #1f2430;
    margin: 0;
}
.container { max-width: 1100px; margin: 0 auto; padding: 24px 16px 60px; }
.container-centro {
    max-width: 380px; margin: 80px auto; background: #fff; padding: 32px;
    border-radius: 10px; box-shadow: 0 2px 10px rgba(0,0,0,.06);
}
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.topbar a { color: #2563eb; text-decoration: none; margin-left: 12px; }
.user-chip { background: #e5e7eb; padding: 4px 10px; border-radius: 999px; font-size: 13px; }
.card {
    background: #fff; border-radius: 10px; padding: 20px 24px; margin-bottom: 20px;
    box-shadow: 0 1px 4px rgba(0,0,0,.05);
}
h1 { font-size: 22px; margin: 0; }
h2 { font-size: 16px; margin-top: 0; }
label { display: block; font-size: 13px; margin: 12px 0 4px; color: #4b5563; }
input[type=text], input[type=password], input[type=number] {
    width: 100%; padding: 9px 10px; border: 1px solid #d1d5db; border-radius: 6px; font-size: 14px;
}
button {
    margin-top: 16px; background: #2563eb; color: #fff; border: none; padding: 10px 18px;
    border-radius: 6px; font-size: 14px; cursor: pointer;
}
button:hover { background: #1d4ed8; }
button:disabled { background: #9ca3af; cursor: default; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid #eee; white-space: nowrap; }
th { color: #6b7280; font-weight: 600; }
.tabla-scroll { overflow-x: auto; }
.muted { color: #6b7280; font-size: 13px; }
.aviso-error { background: #fee2e2; color: #991b1b; padding: 10px; border-radius: 6px; margin-bottom: 14px; font-size: 13px; }
.aviso-ok { background: #dcfce7; color: #166534; padding: 10px; border-radius: 6px; margin-bottom: 14px; font-size: 13px; }
.progreso { margin-top: 20px; }
.progreso.oculto { display: none; }
.barra { background: #e5e7eb; border-radius: 999px; height: 10px; overflow: hidden; margin-top: 8px; }
.barra-relleno { background: #2563eb; height: 100%; width: 0%; transition: width .3s; }