/* Color primario institucional */
:root {
    --primary-dark: #003366;
    --primary-hover: #00264d;
    --accent-color: #0056b3;
}

/* Estilos mejorados para el título principal */
.title-container {
    margin-bottom: 0.5rem;
}

.main-title {
    color: var(--primary-dark);
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    position: relative;
    display: inline-block;
    padding: 0.5rem 0;
}

    .main-title::after {
        content: "";
        position: absolute;
        left: 50%;
        bottom: 0;
        width: 80px;
        height: 4px;
        background: linear-gradient(90deg, var(--primary-dark), var(--accent-color));
        transform: translateX(-50%);
        border-radius: 2px;
    }

.text-primary-dark {
    color: var(--primary-dark);
}

.btn-primary-dark {
    background-color: var(--primary-dark);
    color: white;
    border: none;
    transition: all 0.3s ease;
}

    .btn-primary-dark:hover {
        background-color: var(--primary-hover);
        color: white;
        transform: translateY(-1px);
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    }

/* Tarjeta de login con sombra suave */
.login-card {
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

/* Logo */
.logo-img {
    height: 80px;
    max-width: 100%;
    object-fit: contain;
}

/* Campos de entrada personalizados */
.custom-input {
    border-radius: 0.375rem;
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

    .custom-input:focus {
        box-shadow: 0 0 0 0.25rem rgba(0, 51, 102, 0.15);
        border-color: var(--primary-dark);
    }

.input-group-text {
    border-radius: 0.375rem 0 0 0.375rem;
    border-color: #dee2e6;
}

/* Estiliza el captcha */
#captchaContainer {
    transform: scale(1);
    transform-origin: center;
}

/* Mejoras responsivas */
@media (max-width: 768px) {
    .main-title {
        font-size: 2rem;
    }
}

@media (max-width: 576px) {
    .card-body {
        padding: 2rem !important;
    }

    .main-title {
        font-size: 1.75rem;
    }
}