/* Layout Principal */
.app-layout {
    display: flex;
    min-height: calc(100vh - 70px); /* Altura total menos header */
}

/* Menu Lateral */
.menu-lateral {
    width: 250px;
    background-color: var(--card-bg);
    border-right: 1px solid var(--border-color);
    padding: 20px 0;
    flex-shrink: 0;
}

.menu-lateral ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.menu-lateral li {
    padding: 15px 25px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text-secondary);
    transition: all 0.2s;
    font-weight: 500;
}

.menu-lateral li:hover, .menu-lateral li.active {
    background-color: var(--bg-color);
    color: var(--text-color);
    border-left: 4px solid var(--text-color);
}

.menu-lateral li i {
    width: 20px;
    text-align: center;
}

/* Área de Conteúdo */
.app-container {
    flex: 1;
    padding: 40px;
    background-color: var(--bg-color);
    overflow-y: auto;
}

.tab-content {
    max-width: 600px;
    margin: 0 auto;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

h3 {
    margin-bottom: 25px;
    font-size: 1.5rem;
    color: var(--text-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

/* Grid de Formulários */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 20px;
}

/* Resultado */
.result {
    margin-top: 25px;
    padding: 20px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
}

/* --- ESTILOS ESPECÍFICOS DO RESISTOR --- */
.resistor-options {
    display: flex;
    justify-content: center;
    gap: 30px; /* Espaço entre as opções */
    margin-bottom: 20px;
    align-items: center;
}

.resistor-options label {
    cursor: pointer;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Responsivo */
@media (max-width: 768px) {
    .app-layout {
        flex-direction: column;
    }

    .menu-lateral {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        overflow-x: auto;
    }

    .menu-lateral ul {
        display: flex;
        padding: 10px;
    }

    .menu-lateral li {
        padding: 10px 15px;
        white-space: nowrap;
        border-left: none;
        border-bottom: 3px solid transparent;
        border-radius: 4px;
    }

    .menu-lateral li:hover, .menu-lateral li.active {
        border-left: none;
        border-bottom-color: var(--text-color);
    }

    .app-container {
        padding: 20px;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }
}