:root {
    --azul: #2682c5;
    --celeste: #a6d9ef;
    --oscuro: #0d181c;
}
* {
    font-family: 'Inter', sans-serif;
}
body {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--oscuro) 0%, #142a3a 60%, #1a3d5c 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}
.login-card {
    background: rgba(255, 255, 255, 0.97);
    border-radius: 24px;
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.3);
}
.brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--oscuro);
}
.brand b {
    color: var(--azul);
}
.form-label {
    font-size: 0.82rem;
    font-weight: 600;
    color: #555;
    margin-bottom: 0.3rem;
}
.form-control {
    border-radius: 10px;
    border: 1.5px solid #e0e0e0;
    padding: 0.7rem 1rem;
    font-size: 0.92rem;
    transition: border 0.2s;
}
.form-control:focus {
    border-color: var(--azul);
    box-shadow: 0 0 0 3px rgba(38, 130, 197, 0.12);
}
.btn-ingresar {
    background: var(--azul);
    color: #fff;
    border: none;
    border-radius: 50px;
    padding: 0.85rem;
    font-weight: 700;
    font-size: 1rem;
    width: 100%;
    transition: all 0.3s;
}
.btn-ingresar:hover {
    background: #1a6aad;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(38, 130, 197, 0.4);
}
.tenant-badge {
    background: rgba(38, 130, 197, 0.08);
    border: 1px solid rgba(38, 130, 197, 0.2);
    border-radius: 10px;
    padding: 0.6rem 1rem;
    font-size: 0.82rem;
    color: var(--azul);
    font-weight: 600;
}
#alertError {
    display: none;
}