/* ========================================
   PORTAL CSS - Página de seleção de sistemas
======================================== */

.portal {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 120px var(--spacing-xl) var(--spacing-3xl);
    background: linear-gradient(135deg, var(--vex-azul-profundo) 0%, var(--vex-azul-petroleo) 50%, var(--vex-azul-escuro) 100%);
}

.portal__header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.portal__logo {
    display: block;
    width: 180px;
    margin: 0 auto var(--spacing-xl);
}

.portal__title {
    font-family: var(--font-primary);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--vex-branco);
    margin-bottom: var(--spacing-sm);
}

.portal__subtitle {
    font-family: var(--font-secondary);
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.65);
}

.portal__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    width: 100%;
    max-width: 900px;
}

.portal__card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-2xl) var(--spacing-xl);
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-xl);
    text-align: center;
    transition: var(--transition-medium);
    text-decoration: none;
    color: var(--vex-branco);
}

.portal__card:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-6px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    color: var(--vex-branco);
}

.portal__card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-lg);
}

.portal__card-icon svg {
    width: 28px;
    height: 28px;
    fill: var(--vex-branco);
}

.portal__card--lab .portal__card-icon {
    background: linear-gradient(135deg, var(--vex-verde-agua), var(--vex-verde-escuro));
}

.portal__card--imagem .portal__card-icon {
    background: linear-gradient(135deg, #6366f1, #4f46e5);
}

.portal__card--admin .portal__card-icon {
    background: linear-gradient(135deg, var(--vex-amarelo-ouro), var(--vex-amarelo-escuro));
}

.portal__card-title {
    font-family: var(--font-primary);
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.portal__card-description {
    font-family: var(--font-secondary);
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.55);
    line-height: 1.5;
}

.portal__back {
    margin-top: var(--spacing-3xl);
    font-family: var(--font-secondary);
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.45);
    text-decoration: none;
    transition: var(--transition-fast);
}

.portal__back:hover {
    color: rgba(255, 255, 255, 0.8);
}

/* Responsive */
@media (max-width: 768px) {
    .portal {
        padding: 100px var(--spacing-lg) var(--spacing-2xl);
    }

    .portal__grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }

    .portal__logo {
        width: 140px;
    }
}