/* ChatBotCR — Login / autenticación. Mobile-first. */
:root {
    --cbcr-primary: #2563eb;
    --cbcr-primary-dark: #1d4ed8;
    --cbcr-bg-1: #0f172a;
    --cbcr-bg-2: #1e3a8a;
    --cbcr-card: #ffffff;
    --cbcr-text: #0f172a;
    --cbcr-muted: #64748b;
    --cbcr-border: #e2e8f0;
    --cbcr-danger: #dc2626;
    --cbcr-radius: 16px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    min-height: 100%;
}

body.cbcr-auth {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.25rem;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--cbcr-text);
    background: radial-gradient(1200px 600px at 50% -10%, var(--cbcr-bg-2), var(--cbcr-bg-1));
}

.cbcr-auth-card {
    width: 100%;
    max-width: 410px;
    background: var(--cbcr-card);
    border-radius: var(--cbcr-radius);
    box-shadow: 0 20px 50px rgba(2, 6, 23, .35);
    padding: 2rem 1.6rem;
    animation: cbcr-pop .35s ease;
}

@keyframes cbcr-pop {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

.cbcr-brand {
    text-align: center;
    margin-bottom: 1.5rem;
}
.cbcr-brand .cbcr-logo {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--cbcr-primary), var(--cbcr-bg-2));
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.9rem;
    margin-bottom: .75rem;
}
.cbcr-brand h1 {
    font-size: 1.35rem;
    font-weight: 700;
    margin: 0;
}
.cbcr-brand p {
    margin: .25rem 0 0;
    color: var(--cbcr-muted);
    font-size: .9rem;
}

.cbcr-form label {
    font-weight: 600;
    font-size: .85rem;
    margin-bottom: .35rem;
    display: block;
}
.cbcr-form .form-control {
    border-radius: 10px;
    padding: .7rem .9rem;
    border: 1px solid var(--cbcr-border);
}
.cbcr-form .form-control:focus {
    border-color: var(--cbcr-primary);
    box-shadow: 0 0 0 .2rem rgba(37, 99, 235, .15);
}
.cbcr-input-group { position: relative; }
.cbcr-toggle-pass {
    position: absolute;
    top: 50%;
    right: .6rem;
    transform: translateY(-50%);
    background: none;
    border: 0;
    color: var(--cbcr-muted);
    cursor: pointer;
    padding: .25rem .4rem;
    line-height: 1;
}

.cbcr-btn {
    width: 100%;
    border: 0;
    border-radius: 10px;
    padding: .8rem 1rem;
    font-weight: 600;
    color: #fff;
    background: var(--cbcr-primary);
    transition: background .15s ease;
}
.cbcr-btn:hover { background: var(--cbcr-primary-dark); }
.cbcr-btn:disabled { opacity: .65; cursor: not-allowed; }

.cbcr-alert {
    background: #fef2f2;
    color: var(--cbcr-danger);
    border: 1px solid #fecaca;
    border-radius: 10px;
    padding: .7rem .9rem;
    font-size: .88rem;
    margin-bottom: 1rem;
}

.cbcr-foot {
    text-align: center;
    color: var(--cbcr-muted);
    font-size: .78rem;
    margin-top: 1.4rem;
}

@media (min-width: 576px) {
    .cbcr-auth-card { padding: 2.4rem 2.2rem; }
}